【025】◀▶ ArcObjects 类库（二）

ArcObjects 类库（二）

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Geometry 命名空间

A1 ………… IGeometry 接口
　　 IGeometryCollection 接口
A2 ………… IEnvelope 接口
A3 ………… IPoint 接口
A4 ………… ICurve3 接口
A5 ………… ISegment 接口
A6 ………… ICircularArc 接口
　　 IConstructCircularArc2 接口
A7 ………… ILine2 接口
A8 ………… IEllipticArc 接口
A9 ………… IBezierCurve3 接口
Aa ………… IPath 接口
Ab ………… IRing2 接口
Ac ………… IPolycurve2 接口
Ad ………… IPolyline6 接口
Ae ………… IPolygon4 接口
Af ………… ITopologicalOperator5 接口
Ag ………… IArea 接口
Ah ………… ISegmentCollection 接口
Ai ………… ISpatialReferenceFactory3 接口
Aj ………… IGeographicCoordinateSystemEdit 接口
Ak ………… IGeographicCoordinateSystem2 接口
Al ………… IProjectedCoordinateSystemEdit 接口
Am………… IProjectedCoordinateSystem5 接口
An ………… IVerticalCoordinateSystemEdit 接口
Ao ………… IVerticalCoordinateSystem 接口
Ap ………… IRelationalOperator 接口
Aq ………… IRelationalOperator 接口
Ar ………… IRelationalOperator 接口
As ………… IRelationalOperator 接口
At ………… IRelationalOperator 接口

 Display 命名空间

G1 ………… IRgbColor 接口
G2 ………… ISimpleLineSymbol 接口
G3 ………… ISimpleFillSymbol 接口
G4 ………… IDisplayTransformation 接口
G5 ………… IScreenDisplay 接口
G6 ………… ITextSymbol 接口
G7 ………… IRgbColor 接口
G8 ………… ISimpleLineSymbol 接口
G9 ………… ISimpleFillSymbol 接口
Ga ………… IDisplayTransformation 接口
Gb ………… IScreenDisplay 接口
Gc ………… ITextSymbol 接口
Gd ………… FileSystemInfo 接口

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●·● Geometry 命名空间

1. Geometry 类库中提供了和矢量的几何体相关的对象，例如：点、线、面、三维模型等。矢量数据由最小的单元点组成，每个点都有 x、y、z、m 四个坐标值，z 表示高程，m 值表示测量值，一般用来存储里程值。对几何体的创建和修改，以及几何体之间的空间分析都通过该类库来实现。下图为一个点、线、面等对象之间的关系。

【025】◀▶ ArcObjects 类库（二）

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●·● IGeometry 接口：

1. IGeometry5. Please consider using the more recent version.

　　Common properties and methods shared by all geometric objects. Geometries are objects that define a spatial location and an associated geometric shape.

　　CoClasses that implement IGeometry

CoClasses and Classes	Description
BezierCurve	A cubic Bezier curve defined between two points; optionally has measure, height and ID attributes at each endpoint.
CircularArc	A portion of a circle that connects two points optionally has measure, height and ID attributes at each endpoint.
EllipticArc	A portion of the boundary of a 2D ellipse that connects two points; optionally has measure, height and ID attributes at each endpoint.
Envelope	A rectangle with sides parallel to a coordinate system defining the extent of another geometry; optionally has min and max measure, height and ID attributes.
GeoEllipse (esriDefenseSolutions)	Its a spheroidal ellipse.
GeometryBag	An ordered collection of objects that support the IGeometry interface.
GeoPolygon (esriDefenseSolutions)	Its a spheroidal polygon.
GeoPolyline (esriDefenseSolutions)	This is a spheroidal polyline.
Line	A 2D straight line between a pair of 2D endpoints; can optionally have height, measure and ID attributes at each endpoint.
MultiPatch	A collection of surface patches.
Multipoint	An ordered collection of points; optionally has measure, height and ID attributes.
Path	A sequence of connected segments.
Point	A two dimensional point, optionally with measure, height, and ID attributes.
Polygon	A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes.
Polyline	An ordered collection of paths; optionally has measure, height and ID attributes.
Ray	A 3D ray that begins at a point and extends infinitely along a line in one direction only.
Ring	An area bounded by one, closed sequence of connected segments; optionally has measure, height and ID attributes at each vertex.
Sphere	A complete sphere.
TriangleFan	A continuous 3D fan of triangles, where each triangle after the first shares an edge with the preceding triangle, and all triangles share a common pivot point.
Triangles	A collection of 3D triangles, where each consecutive triplet of vertices defines a new triangle
TriangleStrip	A continuous 3D strip of triangles, where each triangle after the first shares an edge with the preceding triangle.

2. 属性和方法：

		Description
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	GeometryType esriGeometryType 枚举	The type of this geometry. 空、点、多点、线、圆、椭圆、贝塞尔、路径、折线、环、多边形……
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	IsEmpty	Indicates whether this geometry contains any points.
	Project	Projects this geometry into a new spatial reference.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	SetEmpty	Removes all points from this geometry.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.

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●·● IGeometryCollection 接口：

1. Provides access to members that can be used for accessing, adding and removing individual geometries of a multi-part geometry (Multipoint, Polyline, Polygon, MultiPatch, and GeometryBag).

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●·● IEnvelope 接口：

1. IEnvelope2. Please consider using the more recent version.

【025】◀▶ ArcObjects 类库（二）

YMax of the object. Envelopes can also serve as the viewing area for a particular view screen or data frame.

IGeometry

Envelope：CoClass

2. 属性和方法：

	属性和方法	Description
	CenterAt	Moves this envelope so it is centered at p.
	DefineFromPoints	Defines the envelope to cover all the points.
	Depth	The depth of the envelope.
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	Expand (double dx, double dy, bool asRatio)	Moves the X and Y coordinates of the sides toward or away from each other. dx, dy 取大于1的数是缩小，取小于1的数是放大。 iEnv.Expand(0.5, 0.5, true); //放大 iEnv.Expand(2, 2, true); //缩小 pEnv = axMapControl1.Extent;　　//当前赋值 pEnv.Expand(2,2,true);　　　　//缩小操作 axMapControl1.Extent = pEnv;　　//赋值给当前
	ExpandM	Moves the measure of the sides toward or away from each other.
	ExpandZ	Moves the Z attribute of the sides toward or away from each other.
	GeometryType	The type of this geometry.
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	Height	The height of the envelope.
	Intersect	Adjusts to include only the area also included by inEnvelope.
	IsEmpty	Indicates whether this geometry contains any points.
	LowerLeft	The lower left corner.
	LowerRight	The lower right corner.
	MMax	The maximum measure value in the area of the envelope.
	MMin	The minimum measure value in the area of the envelope.
	Offset	Moves the sides x units horizontally and y units vertically.
	OffsetM	Moves the sides m units.
	OffsetZ	Moves the sides z units.
	Project	Projects this geometry into a new spatial reference.
	PutCoords	Constructs an envelope from the coordinate values of lower, left and upper, right corners.
	QueryCoords	Returns the coordinates of lower, left and upper, right corners.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	SetEmpty	Removes all points from this geometry.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.
	Union (IEnvelope inEnvelope)	Adjusts to overlap inEnvelope. 注意在用的时候，union的主体不能为null，否则会出错的~！
	UpperLeft	The upper left corner.
	UpperRight	The upper right corner.
	Width	The width of the envelope.
	XMax	The position of the right side. 获取最大的地图横坐标.
	XMin	The position of the left side. 获取最小的地图横坐标.
	YMax	The position of the top.
	YMin	The position of the bottom.
	ZMax	The maximum Z value in the area of the envelope.
	ZMin	The minimum Z value in the area of the envelope.

利用union的方法，实现缩放到选择的要素

首先：获取选择要素的OID值~

然后：将所有的envelope合并到一起~

最后：实现、刷新~

private void 缩放到所有选择要素ToolStripMenuItem_Click(object sender, EventArgs e)
{
    DataGridViewSelectedRowCollection selectRows = dataGridView1.SelectedRows;  //重新将选择的行排序
    List<string> OIDList = new List<string>();
    string strOID = string.Empty;
    for (int i = 0; i < selectRows.Count;i++ )
    {
        DataGridViewRow row = selectRows[i];
        strOID = row.Cells[strOBJECTID].Value.ToString();   //将重新排序的OID值提取出来
        OIDList.Add(strOID);
    }
    string[] OIDArray = OIDList.ToArray();
    if (OIDArray.Length == 0) return;   //若是没有选择要素，则返回
    IFeatureClass pFeatureClass = pLayer.FeatureClass;
    IFeature pFeature = null;
    IEnvelope wholeEnvelope = pFeatureClass.GetFeature(Convert.ToInt32(OIDArray[0])).Shape.Envelope;
    //要给其先赋值一个envelope，否则后面没办法union！
    IEnvelope featureEnvelpe = null;
    for (int i = 1; i < OIDArray.Length;i++ )
    {
        pFeature = pFeatureClass.GetFeature(Convert.ToInt32(OIDArray[i]));
        featureEnvelpe = pFeature.Shape.Envelope;
        wholeEnvelope.Union(featureEnvelpe);
    }
    pMapControl.Extent = wholeEnvelope;
    pMapControl.ActiveView.Refresh();
}

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●·● IPoint 接口：

1. Provides access to members that define two dimensional points.【点】

IConstructPoint interface.

IGeometry

Point：CoClass

2. 属性和方法：

	属性和方法	Description
	Compare	Compares X, Y, M, Z, ID of this point (in that order) with that of the other point. Returns -1 if this point's value is less, 1 if greater, and 0 otherwise. Useful for sorting a group of points.
	ConstrainAngle	Projects this point to the point on the infinite line defined by anchor and angle (in radians). If allowOpposite is true, then the point can also snap to angle + pi radians.
	ConstrainDistance	Projects this point to the perimeter of the circle defined by radius and anchor.
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	GeometryType	The type of this geometry.
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	ID	The Point ID attribute.
	IsEmpty	Indicates whether this geometry contains any points.
	M	The measure attribute.
	Project	Projects this geometry into a new spatial reference.
	PutCoords (double x, double y)	Sets the X and Y coordinates. 设置横纵坐标，既可以是像素坐标、也可以是地理坐标。
	QueryCoords	Returns the X and Y coordinates.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	SetEmpty	Removes all points from this geometry.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.
	X	The X coordinate.
	Y	The Y coordinate.
	Z	The Z attribute.

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●·● ICurve3 接口：

1. Provides access to members that extend the functionality of one dimensional curves. 【曲线】

　　CoClasses that implement ICurve3

CoClasses and Classes	Description
BezierCurve	A cubic Bezier curve defined between two points; optionally has measure, height and ID attributes at each endpoint.
CircularArc	A portion of a circle that connects two points optionally has measure, height and ID attributes at each endpoint.
EllipticArc	A portion of the boundary of a 2D ellipse that connects two points; optionally has measure, height and ID attributes at each endpoint.
Line	A 2D straight line between a pair of 2D endpoints; can optionally have height, measure and ID attributes at each endpoint.
Polyline	An ordered collection of paths; optionally has measure, height and ID attributes.

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●·● ISegment 接口：

1. Provides access to members that identify a segment. A segment is a way of getting between two endpoints.【两点之间的线】

【025】◀▶ ArcObjects 类库（二）

　　CoClasses that implement ISegment

CoClasses and Classes	Description
BezierCurve	A cubic Bezier curve defined between two points; optionally has measure, height and ID attributes at each endpoint.
CircularArc	A portion of a circle that connects two points optionally has measure, height and ID attributes at each endpoint.
EllipticArc	A portion of the boundary of a 2D ellipse that connects two points; optionally has measure, height and ID attributes at each endpoint.
Line	A 2D straight line between a pair of 2D endpoints; can optionally have height, measure and ID attributes at each endpoint.

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●·● ICircularArc 接口：

1. Provides access to members that control properties of circular arcs.【圆弧】

　　A CircularArc is an object that describes any portion of a circle. The size of the CircularArc is determined by the length of the Radius and the Central Angle. CircularArcs can be constructed by numerous different methods given a wide variety of input parameters. A CircularArc differs from an EllipticArc in that every point along the CircularArc must be a fixed distance (the Radius) from the CenterPoint.

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●·● IConstructCircularArc2 接口：

1. Provides access to members that construct a circular arc using other geometries and values.【用其他的几何体创建圆弧】

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●·● ILine2 接口：

1. Provides access to the coordinates of a line segment in the form of Well Known Structures (WKS).【有起始点与终止点的直线段】

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●·● IEllipticArc 接口：

1. Provides access to members that control properties of elliptic arc segments.【椭圆弧线】

　　An Elliptic Arc is an object that describes any portion of an ellipse. The Major axis of the Elliptic Arc is the largest axis spanning between points on opposite sides of the ellipse. The Minor axis is the perpendicular bisector of the Major axis. Together, the Major and Minor axes determine the full ellipse on which the Elliptic Arc is generated. These parameters may also be specified in terms of the semi-Major axis (half of the Major axis) and the MinorMajorRatio (the ratio of the Minor axis to the Major axis). The ellipse may also be rotated. Rotation is described by the Rotation Angle. However, the effect of the Rotation Angle depends on the value of EllipseStd. If EllipseStd is TRUE, all angles and axes are calculated with respect to the Major Axis as though the Major Axis was at 0 radians. Also, the location of the From Point and To Point are given relative to the Center Point as though it is the origin. If EllipseStd is FALSE, all angles are caluclated in standard Cartesian coordinates. The portion of the complete ellipse represented by the Elliptic Arc is determined by the From Angle and Central Angle, both measured in radians.

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●·● IBezierCurve3 接口：

1. Provides access to members that identify third degree bezier curve segments and defines their properties.【贝塞尔曲线】

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●·● IPath 接口：

1. Provides access to members that identify a path and define its behavior.【由多个连续的 segment 组成】

【025】◀▶ ArcObjects 类库（二）

　　A Path is a connected, continuous sequence of Segments. Except for the first and last Segments in the Path, each segment shares its FromPoint with the ToPoint of the previous Segment, and shares its ToPoint with the FromPoint of the following Segment.

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●·● IRing2 接口：

1. Provides extended access to members that identify a ring and define its behavior.【起始点与终止点重合的 path】

【025】◀▶ ArcObjects 类库（二）

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●·● IPolycurve2 接口：

1. Provides access to members that extend IPolycurve with additional splitting and densification methods. Note: the IPolycurve2 interface has been superseded byIPolycurve3. Please consider using the more recent version.【polyline 与polygon 的边框线】

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●·● IPolyline6 接口：

1. Provides access to members that extend a polyline object.【相连、不相连，各种线都可以】

【025】◀▶ ArcObjects 类库（二）

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●·● IPolygon4 接口：

1. Provides access to members that extend the IPolygon3 interface.【多边形边界，可以看成封闭的 polyline】

【025】◀▶ ArcObjects 类库（二）

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●·● ITopologicalOperator5 接口：

1. Provides additional information on non-simple geometries.【拓扑操作】

　　Members

		Description
	Boundary 返回值：IGeometry	The boundary of this geometry. A polygon's boundary is a polyline. A polyline's boundary is a multipoint. A point or multipoint's boundary is an empty point or multipoint.
	Buffer (double distance) 返回值：IGeometry	Constructs a polygon that is the locus of points at a distance less than or equal to a specified distance from this geometry. 通过给定距离，得到操作图形的缓冲区，返回得到缓冲区几何图形！
	Clip (IEnvelope clipperEnvelope)	Constructs the intersection of this geometry and the specified envelope. 返回矩形部分的要素，直接作用在要素上面！
	ClipDense	Constructs the intersection of this geometry and the specified envelope; densifies lines in output contributed by the clipping envelope.
	ClipEx	Constructs the intersection of this geometry and the specified envelope.
	ClipToDomain	Clips the geometry to the domain of the spatial reference. Useful for ensuring that buffers can be fit within the spatial domain of the feature class to which they are being added.
	ConstructUnion	Defines this geometry to be the union of the inputs. More efficient for unioning multiple geometries than calling Union repeatedly.
	ConvexHull	Constructs the convex hull of this geometry.
	Cut (IPolyline cutter, ref IGeometry leftGeom, ref IGeometry rightGeom)	Splits this geometry into a part left of the cutting polyline, and a part right of it. 通过给定的 cutter 来分割，同时得到操作几何的 leftGeom 和 rightGeom。
	Cut2	Divides a geometry into multiple parts
	Difference	Constructs the geometry containing points from this geometry but not the other geometry.
	GeoNormalizeEx	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	Intersect	Constructs the geometry that is the set-theoretic intersection of the input geometries. Use different resultDimension values to generate results of different dimensions.
	IntersectMultidimension	Constructs the set-theoretic intersection of the inputs. The results are returned in a geometry bag with one element per result dimension.
	IsKnownSimple	Indicates whether this geometry is known (or assumed) to be topologically correct.
	IsKnownSimple	Indicates whether this geometry is known (or assumed) to be topologically correct.
	IsSimple	Indicates whether this geometry is known (or assumed) to be topologically correct, after explicitly determining this if the geometry is not already known (or assumed) to be simple.
	IsSimpleEx	Determines why a geometry is not simple. Currently only implemented for polygons.
	QueryClipped	Redefines clippedGeometry to be the intersection of this geometry and the clipping envelope.
	QueryClippedDense	Redefines clippedGeometry to be the intersection of this geometry and the clipping envelope; densifies lines in the output contributed by the clipping envelope.
	Simplify	Makes this geometry topologically correct.
	SymmetricDifference	Constructs the geometry that contains points from either but not both input geometries.
	Union (IGeometry other) 返回值：IGeometry	Constructs the geometry that is the set-theoretic union of the input geometries. 将操作几何图形与 other 结合到一起，形成新的几何图形，对原图形不做改变！

　　CoClasses that implement ITopologicalOperator

CoClasses and Classes	Description
GeoEllipse (esriDefenseSolutions)	Its a spheroidal ellipse.
GeometryBag	An ordered collection of objects that support the IGeometry interface.
GeoPolygon (esriDefenseSolutions)	Its a spheroidal polygon.
GeoPolyline (esriDefenseSolutions)	This is a spheroidal polyline.
MultiPatch	A collection of surface patches.
Multipoint	An ordered collection of points; optionally has measure, height and ID attributes.
Point	A two dimensional point, optionally with measure, height, and ID attributes.
Polygon	A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes.
Polyline	An ordered collection of paths; optionally has measure, height and ID attributes.

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●·● IArea 接口：

1. Provides access to members that return properties common to rings and polygons.【封闭图形才有能实现 IArea 接口】

　　Use the IArea interface to get the Area of a Geometry. It can also be used to get the Centroid point and Labelpoint for a Geometry.　

　　Members

		Description
	Area	The area.
	Centroid	The center of gravity (centroid).
	LabelPoint	A point guaranteed to be inside this area.
	QueryCentroid	Copies the centroid of this area to the specified point.
	QueryLabelPoint	Copies to the input point a point guaranteed to be inside this area.

　　CoClasses that implement IArea

CoClasses and Classes	Description
Envelope	A rectangle with sides parallel to a coordinate system defining the extent of another geometry; optionally has min and max measure, height and ID attributes.
GeoEllipse (esriDefenseSolutions)	Its a spheroidal ellipse.
GeoPolygon (esriDefenseSolutions)	Its a spheroidal polygon.
MultiPatch	A collection of surface patches.
Polygon	A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes.
Ring	An area bounded by one, closed sequence of connected segments; optionally has measure, height and ID attributes at each vertex.

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●·● ISegmentCollection 接口：

1. Provides access to members that manipulate the segments of a path, ring, polyline, or polygon.【段的集合】

m_ActiveView = m_hookHelper.ActiveView;
m_Map = m_hookHelper.FocusMap;
IScreenDisplay pScreenDisplay = m_ActiveView.ScreenDisplay;
IRubberBand pRubberCircle = new RubberCircleClass();
ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = getRGB(255, 255, 0);
IGeometry pCircle = pRubberCircle.TrackNew(pScreenDisplay, (ISymbol)pFillSymbol) as IGeometry;

IPolygon pPolygon = new PolygonClass();　　　　//空的多边形
ISegmentCollection pSegmentCollection = pPolygon as ISegmentCollection;　　//段集合
ISegment pSegment = pCircle as ISegment;　　//将圆赋值给段
object missing = Type.Missing;　　//显示默认值
pSegmentCollection.AddSegment(pSegment, ref missing, ref missing);　　//给空多边形加入圆
pFillSymbol.Style = esriSimpleFillStyle.esriSFSDiagonalCross;
pFillSymbol.Color = getRGB(0, 255, 255);
IFillShapeElement pPolygonEle = new PolygonElementClass();
pPolygonEle.Symbol = pFillSymbol;
IElement pEle = pPolygonEle as IElement;
pEle.Geometry = pPolygon;
IGraphicsContainer pGraphicsContainer = m_Map as IGraphicsContainer;
pGraphicsContainer.AddElement(pEle, 0);
m_ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

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●·● ISpatialReferenceFactory3 接口：

1. Provides access to members that create vertical datums or coordinate systems.

　　可以用此属性来创建很多与空间参考相关的值，例如 Datum、Prime Meridian、Unit 等！

ISpatialReferenceFactory3 spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
IDatum datum = spatialReferenceFactory.CreateDatum((int)esriSRDatumType.esriSRDatum_OSGB1936);
IPrimeMeridian primeMeridian = spatialReferenceFactory.CreatePrimeMeridian((int)esriSRPrimeMType.esriSRPrimeM_Greenwich);
IUnit unit = spatialReferenceFactory.CreateUnit((int)esriSRUnitType.esriSRUnit_Degree);

　　CoClasses that implement ISpatialReferenceFactory3

CoClasses and Classes	Description
SpatialReferenceEnvironment	Creates various spatial reference objects.

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●·● IGeographicCoordinateSystemEdit 接口：

1. Provides access to members that control the properties for a geographic coordinate system.【实现定义】

　　Members

		Description
	Define (ref object Name, ref object Alias, ref object Abbreviation, ref object Remarks, ref object useage, ref object Datum, ref object PrimeMeridian, ref object geographicUnit)	Defines the properties for a geographic coordinate system.
	DefineEx	Defines the properties for a geographic coordinate system.

　　CoClasses that implement IGeographicCoordinateSystemEdit

CoClasses and Classes	Description
GeographicCoordinateSystem	Creates a geographic coordinate system.

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●·● IGeographicCoordinateSystem2 接口：

1. Provides access to members that control additional properties and methods for all geographic coordinate systems.

　CoClasses that implement IGeographicCoordinateSystemEdit

CoClasses and Classes	Description
GeographicCoordinateSystem	Creates a geographic coordinate system.

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●·● IProjectedCoordinateSystemEdit 接口：

1. Provides access to members that control the properties of a projected coordinate system.

　　CoClasses that implement IProjectedCoordinateSystem5

CoClasses and Classes	Description
ProjectedCoordinateSystem	Creates a projected coordinate system.

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●·● IProjectedCoordinateSystem5 接口：

1. Provides access to members that control additional properties and methods for projected coordinate systems.

　　CoClasses that implement IProjectedCoordinateSystem5

CoClasses and Classes	Description
ProjectedCoordinateSystem	Creates a projected coordinate system.

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●·● IVerticalCoordinateSystemEdit 接口：

1. Provides access to members that control the properties of a vertical coordinate system.

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●·● IVerticalCoordinateSystem 接口：

1. Provides access to members that control the properties of a vertical coordinate system.

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●·● IRelationalOperator 接口：

1. Provides access to members that determine if a certain spatial relationship exists between two geometries.

　　Members

		Description
	Contains (IGeometry other) 返回值：bool	Indicates if this geometry contains the other geometry. 表明该几何图形是否包含other几何图形？
	Crosses	Indicates if the two geometries intersect in a geometry of lesser dimension.
	Disjoint	Indicates if the two geometries share no points in common. Negate this result to compute the Intersect relation.
	Equals	Indicates if the two geometries are of the same type and define the same set of points in the plane.
	Overlaps	Indicates if the intersection of the two geometries has the same dimension as one of the input geometries.
	Relation	Indicates if the defined relationship exists.
	Touches	Indicates if the boundaries of the geometries intersect.
	Within	Indicates if this geometry is contained (is within) another geometry.

　　CoClasses that implement IRelationalOperator

CoClasses and Classes	Description
Envelope	A rectangle with sides parallel to a coordinate system defining the extent of another geometry; optionally has min and max measure, height and ID attributes.
GeometryBag	An ordered collection of objects that support the IGeometry interface.
MultiPatch	A collection of surface patches.
Multipoint	An ordered collection of points; optionally has measure, height and ID attributes.
Point	A two dimensional point, optionally with measure, height, and ID attributes.
Polygon	A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes.
Polyline	An ordered collection of paths; optionally has measure, height and ID attributes.

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●·● IRelationalOperator 接口：

1. Provides access to members that control the properties of a vertical coordinate system.

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●·● IRelationalOperator 接口：

1. Provides access to members that control the properties of a vertical coordinate system.

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●·● Display 命名空间

1. DataSourcesFile 类库中提供了文件型数据的访问。基于文件的数据源有：shapefile、coverage、TIN、CAD 等。不同的数据源通过各自的工作空间工厂来访问。

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●·● IRgbColor 接口：

1. Provides access to members that control the RGB color values.

　　IRgbColor maintains information about a Color by using the RGB (Red, Green, Blue) color model.

IColor

：CoClass

2. 属性和方法：

	属性和方法	Description
	Blue	The blue component of an IRgbColor (0-255).
	CMYK	The CMYK value of color.
	GetCIELAB	The CIELAB value of color.
	Green	The green component of an IRgbColor (0-255).
	NullColor	Indicates whether this color is null.
	Red	The red component of an IRgbColor (0-255).
	RGB	The RGB value of color.
	SetCIELAB	The CIELAB value of color.
	Transparency 返回值: byte	The Alpha Blending value. (0 for transparent, 255 for opaque [əu'peik] 【不透明】).
	UseWindowsDithering	Indicates if colors should be dithered to simulate colors that aren't supported by the display. This only applies on displays that have 256 or fewer colors.

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●·● ISimpleLineSymbol 接口：

1. Provides access to members that control the simple line symbol.

　　ISimpleLineSymbol is used to create a line symbol comprised of a predefinded set of styles. The availble styles are provided by the esriSimpleLineStyle enumeration. Use the ILineSymbol interface to set additional properties for ISimpleLineSymbols.

ILineSymbol

：CoClass

2. 属性和方法：

	属性和方法	Description
	Color	Line symbol color.
	Style	The style of the line symbol.
	Width	Line symbol width.

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●·● ISimpleFillSymbol 接口：

1. Provides access to members that control the simple fill symbol.

　　ISimpleFillSymbol is used to create a fill symbol comprised of a predefined set of styles. The available styles are provided by the esriSimpleFillStyle enumeration. Use the IFillSymbol interface to set additional properties for ISimpleFillSymbols.

　　It is strongly recommended to not use any Style other than esriSFSSolid. All of the remaining style enumerations can be accomplished using other fill symbol types such as ILineFillSymbol, or by specifying IColor::NullColor for hollow symbols.

IFillSymbol

：CoClass

2. 属性和方法：

		Description
	Color	Fill color.
	Outline 返回值：ILineSymbol	Line symbol of fill outline.
	Style	Fill style.

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●·● IDisplayTransformation 接口：

1. Provides access to members that control Display Transformation.

　　Use IDisplayTransformation for converting coordinates between real-world and device space and back. To prepare a transform for use, follow these steps:

Set the full map extent with the Bounds property
Set the visible map extent (zoom rectangle) with the VisibleBounds property
Set the output area of the device using the DeviceFrame property
Set the resolution of the output device using the Resolution property

　　The transform is based on the ratio between the VisibleBounds and the DeviceFrame. Normally the DeviceFrame is simply the full extent of the device with the origin equal to 0,0.

　　The transform object calculates the FittedBounds automatically and this is the visible map extent adjusted to fit the device.

　　在 MapControl 和 PageLayoutControl 之间建立联系！

　　Inherited Interfaces

Interfaces	Description
ITransformation	Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on.

　　CoClasses that implement IDisplayTransformation

CoClasses and Classes	Description
DisplayTransformation	Display transformation class for converting from world to device units.

2. 属性和方法：

		Description
	Bounds	Full extent in world coordinates.
	ConstrainedBounds	Intersection of Bounds and VisibleBounds.
	DeviceFrame	Visible extent in device coordinates.
	FittedBounds	Device frame in world coordinates.
	FromMapPoint	Calculates device coordinates corresponding to the map point.
	FromPoints	Calculates a map distance corresponding to a point (1/72) distance.
	ReferenceScale	Reference scale for computing scaled symbol sizes.
	Resolution	Resolution of the device in dots (pixels) per inch.
	Rotation	Rotation angle in degrees.
	ScaleRatio	Scale between FittedBounds and DeviceFrame.
	SpatialReference	Current spatial reference.
	SuppressEvents	Indicates if transformation object suppresses events.
	ToMapPoint (int x, int y) 返回值：IPoint	Calculates a point in map coordinates corresponding to the device point. 可以用来获取鼠标点击处的窗体坐标！绘制图形！
	ToPoints	Calculates a distance in points (1/72 inch) corresponding to the map distance.
	TransformCoords	Transforms a set of points or measurements from device to world space or vice versa. Use the flags specified by esriDisplayTransformEnum.
	TransformMeasuresFF	Transforms floating point measures to floating point measures (or do the inverse).
	TransformMeasuresFI	Transforms floating point measures to integer measures (or do the inverse).
	TransformMeasuresIF	Transforms integer measures to floating point measures (or do the inverse).
	TransformMeasuresII	Transforms integer measures to integer measures (or do the inverse).
	TransformPointsFF	Transforms floating point points to floating point points (or do the inverse).
	TransformPointsFI	Transforms floating point points to integer points (or do the inverse).
	TransformPointsIF	Transforms integer points to floating point points (or do the inverse).
	TransformPointsII	Transforms integer points to integer points (or do the inverse).
	TransformRect	Transforms a rectangle from device to world space or vice versa. Use the flags specified by esriDisplayTransformEnum.
	Units	Units used by world coordinates.
	VisibleBounds 返回值：IEnvelope	Visible extent in world coordinates. 在 PageLayoutControl 中实现放大缩小的操作，要通过此属性来完成，相当于 MapControl 中的 Extent 属性！
	ZoomResolution	Indicates if resolution is tied to visible bounds. If true, zooming in magnifies contents (i.e., zoom in on page).

实现 MapControl 与 PageLayoutControl 之间的联系：

IActiveView pActiveView = axPageLayoutControl1.ActiveView.FocusMap as IActiveView;　　//将地图赋值
IDisplayTransformation pDisplayTransformation = pActiveView.ScreenDisplay.DisplayTransformation;　　//定义新的转换
pDisplayTransformation.VisibleBounds = axMapControl1.Extent;　　//通过 pDisplayTransformation 的属性达到关联
axPageLayoutControl1.ActiveView.Refresh();　　　　//刷新

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●·● IScreenDisplay 接口：

1. IScreenDisplay2. Please consider using the more recent version.

　　The IScreenDisplay interface manages the display attributes of a screen. IScreenDisplay also handles other issues specific to windows including the backing store, scrolling, and invalidation.

　　Two objects currently implement IScreenDisplay, AppDisplay and ScreenDisplay. Each object's implementation of IScreenDisplay is slightly different; look at the help for a particular member for more details.

　　Inherited Interfaces

Interfaces	Description
IDisplay	Provides access to members that control the Display.

　　CoClasses that implement IScreenDisplay

CoClasses and Classes	Description
AppDisplay (esriArcMapUI)	ESRI Display.
GlobeDisplay (esriGlobeCore)	The globe display object.
SceneGraph (esri3DAnalyst)	A container for recording data and events that occur in a scene.
ScreenDisplay	Display class for drawing to window.

2. 属性和方法：

		Description
	ActiveCache	Screen cache where drawing occurs. Use rarely. Change cache inside StartDrawing/FinishDrawing sequence.
	AddCache	Creates a new cache and return its ID. The ID can be specified to StartDrawing to direct output to the cache. It can also be used with a number of other methods such as DrawCache and Invalidate.
	CacheCount	Number of screen caches.
	CacheMemDC	Memory device context for the specified screen cache.
	CancelTracker	Cancel tracker that is associated with the display.
	ClipEnvelope	The bounds of the invalid region. Use after StartDrawing and before FinishDrawing.
	ClipEnvelopes	The invalid region as a set of envelopes. Use after StartDrawing and before FinishDrawing.
	ClipGeometry	User-specified clip shape. This shape is merged with the invalid region to arrive at the actual clip region. Must be specified before StartDrawing.
	DisplayTransformation	The transformation used by the display.
	DoScroll	Scrolls the screen by the specified amount.
	DrawCache	Draws the specified screen cache to the specified window device context. Pass an empty rectangle to copy the full bitmap to the DC origin.
	DrawMultipoint	Draws specified multipoint on the display.
	DrawPoint	Draws specified point on the display.
	DrawPolygon	Draws specified polygon on the display.
	DrawPolyline	Draws specified line on the display.
	DrawRectangle	Draws specified rectangle on the display.
	DrawText	Draws specified text on the display.
	Filter	Display filter. Must call while in a StartDrawing-FinishDrawing sequence. Set Filter to 0 to resume normal drawing.
	FinishDrawing	Completes drawing.
	hDC	The device context that the display is currently drawing to. Only valid between calls to StartDrawing and FinishDrawing.
	hPalette	Palette.
	hWnd	Associated window handle.
	IlluminationProps	Illumination properties used by the display.
	Invalidate	Cause the specified area of the specified cache to redraw.
	IsCacheDirty	Indicates if the specified cache needs refreshing.
	IsFirstCacheTransparent	Indicates if the bottom cache is transparent.
	IsFramed	Indicates if drawing occurs in a frame rather than on the whole window.
	PanMoveTo (IPoint mouseLocation)	Pans to a new point. 首先要执行 PanStart 方法，从那个点的位置，移动到当前点的位置！
	PanStart	Prepares display for panning.
	PanStop	Stops panning and returns new visible bounds.
	Progress	Call frequently during drawing process.
	RemoveAllCaches	Removes all caches.
	RemoveCache	Removes the specified cache.
	RotateMoveTo (IPoint pPoint)	Rotates to new point. 旋转到的点！
	RotateStart (IPoint mousePt, IPoint centerPt)	Prepares display for rotating. If centerPt is NULL, the center of the visible bounds is used. 以鼠标点绕中心点进行旋转！
	RotateStop 返回值：double	Stops rotating and returns new angle. 返回旋转的角度。
	RotateTimer	Draws the rotated display. Call in response to WM_TIMER.
	ScaleContents	Indicates if the contents of the screen scale when a resize occurs. True means scale contents to fit new window size. False means contents stays the same with more or less of it showing.
	SetScrollbarHandles	Optionally specify application supplied scrollbars.
	SetSymbol	Sets the symbol used for drawing. Four different symbols can be specified simultaneously: Marker, Line, Fill, Text.
	StartDrawing (int hDC, short cacheID)	Prepare the display for drawing. Specify the device context and the cache to draw to (normally esriNoScreenCache). The ScreenDisplay coclass will automatically create a window device context if you specify hdc = 0. hDC：screendisplay.hDC cacheID：esriScreenCache 枚举：要将其强制转换为 short 类型！
	StartRecording	Starts recording all output to the recording cache.
	StopRecording	Stops recording to the recording cache.
	SuppressEvents	Indicates if display object suppresses events.
	SuppressResize	Indicates if display resizing is suppressed. True means the display doesn't resize with the window. False ensures that the display is the same size as the window.
	TrackPan	Interactively pans the screen. 实现漫游！
	TrackRotate	Interactively rotates the screen. 实现旋转！
	UpdateWindow	Forces a redraw.
	UseScrollbars	Indicates if scrollbars should appear.
	WindowDC	Device context for the associated window. Only use this between calls to StartDrawing and FinishDrawing.

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●·● ITextSymbol 接口：

1. Provides access to members that control text symbols.

　　ITextSymbol is the generic interface for properties of IFormattedTextSymbol and ISimpleTextSymbol.

　　CoClasses that implement ITextSymbol

CoClasses and Classes	Description
TextMarkerSymbol (esriTrackingAnalyst)	Class used to create a text marker symbol used to symbolize point geometries.
TextSymbol	A symbol that controls how text is displayed.

2. 属性和方法：

		Description
	Angle	Text baseline angle.
	Color	Text color.
	Font 返回值：IFontDisp	Text font. System.Drawing.Font netFont = new System.Drawing.Font("Courier New", 20f,FontStyle.Bold); //首先定义一个 .net 中的Font IFontDisp font = ESRI.ArcGIS.ADF.COMSupport.OLE.GetIFontDispFromFont(netFont) as IFontDisp; //通过上面这个方法进行转换！ // Define the font you want to use. stdole.IFontDisp stdFontCls = ((stdole.IFontDisp)(new stdole.StdFont())); stdFontCls.Name = "ESRI Default Marker"; stdFontCls.Size = 24;
	GetTextSize	Gets the x and y dimensions of 'text' in points (1/72 inch).
	HorizontalAlignment	Horizontal alignment style.
	RightToLeft	Indicates if the text is drawn from right to left.
	Size	Text size.
	Text	Text to draw.
	VerticalAlignment	Vertical alignment style.

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●·● IStyleGalleryItem 接口：

1. Provides access to members modify the Style Gallery.

　　IStyleGallery is used to access styles, add new items with AddItem, remove items with RemoveItem, make updates with UpdateItem and save your changes with SaveStyle. Styles provide storage for your colors, map elements, symbols, and properties of symbols.

　　CoClasses that implement IStyleGallery

CoClasses and Classes	Description
ServerStyleGallery	The Server Style Gallery.
StyleGallery (esriFramework)	The Style Gallery object.

2. 属性和方法：

		Description
	AddItem	Adds an item to the target style file.
	Categories	The categories within the given class.
	Class	The class at the given index.
	ClassCount	Number of classes in the Style Gallery.
	Clear	Removes all styles from the Style Gallery.
	ImportStyle	Imports a style from a file other than a .style file.
	Items	The style items from the specified style file, in the specified class and category. The style set and category may be blank to return all items.
	LoadStyle	Loads a style from a file. If class is specified, only items in that class will be loaded.
	RemoveItem	Removes an item from the target style file.
	SaveStyle	Saves the specified style to a file. If class is specified, only items in that class will be saved.
	UpdateItem	Updates an existing item in target style file.

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●·● ISymbol 接口：

1. Provides access to members that control symbols.

　　CoClasses that implement ISymbol

CoClasses and Classes	Description
ArrowMarkerSymbol	A marker symbol created from a predefined arrow.
BarChartSymbol	Defines a bar chart symbol.
CartographicLineSymbol	A line symbol for drawing solid or dashed lines.
CharacterMarker3DSymbol (esri3DAnalyst)	3D Character Marker Symbol component.
CharacterMarkerSymbol	A marker symbol based on a character from a font.
ColorRampSymbol (esriCarto)	ESRI ColorRampSymbol for raster rendering.
ColorSymbol (esriCarto)	ESRI ColorSymbol for raster rendering.
DotDensityFillSymbol	Defines a dot density fill symbol, a data driven symbol commonly used with the dot density renderer.
GradientFillSymbol	A fill symbol composed from a ramp of colors.
HashLineSymbol	A line symbol for drawing hashed or slanted lines.
LineFillSymbol	A fill symbol comprised of any of the supported line symbols.
Marker3DSymbol (esri3DAnalyst)	3D Marker Symbol component.
MarkerFillSymbol	A fill symbol comprised of any of the supported marker symbols.
MarkerLineSymbol	A line symbol composed of repeating markers.
MoleFillSymbol (esriDefenseSolutions)	Mole Fill Symbol Class.
MoleLineSymbol (esriDefenseSolutions)	Mole Line Symbol Class.
MoleMarkerSymbol (esriDefenseSolutions)	Mole Marker Symbol Class.
MultiLayerFillSymbol	A fill symbol that contains one or more layers.
MultiLayerLineSymbol	A line symbol that contains one or more layers.
MultiLayerMarkerSymbol	A marker symbol that contains one or more layers.
PictureFillSymbol	A fill symbol based on either a BMP or an EMF picture.
PictureLineSymbol	A line symbol composed of either a BMP or an EMF picture.
PictureMarkerSymbol	A marker symbol based on either a BMP or an EMF picture.
PieChartSymbol	Defines a pie chart symbol.
RasterRGBSymbol (esriCarto)	ESRI RasterRGBSymbol for raster rendering.
SimpleFillSymbol	A fill symbol comprised from a predefined set of styles.
SimpleLine3DSymbol (esri3DAnalyst)	Simple 3D Line Symbol component.
SimpleLineSymbol	A line symbol comprised of a predefined set of styles.
SimpleMarker3DSymbol (esri3DAnalyst)	Simple 3D Marker Symbol component.
SimpleMarkerSymbol	A marker symbol comprised of a predefined set of styles.
StackedChartSymbol	Defines a stacked chart symbol.
TextMarkerSymbol (esriTrackingAnalyst)	Class used to create a text marker symbol used to symbolize point geometries.
TextSymbol	A symbol that controls how text is displayed.
TextureFillSymbol (esri3DAnalyst)	Texture Fill Symbol component.
TextureLineSymbol (esri3DAnalyst)	Texture Line Symbol component.

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●·● IRubberBand 接口：

1. Provides access to members that control symbols.

IRubberBand2. Please consider using the more recent version.

　　CoClasses that implement IRubberBand

CoClasses and Classes	Description
RubberCircle	Rubberbanding class for circles.
RubberEnvelope	Rubberbanding class for simple envelopes.
RubberLine	Rubberbanding class for lines.
RubberPoint	Rubberbanding class for points.
RubberPolygon	Rubberbanding class for polygons.
RubberRectangularPolygon	Rubberbanding class for rectangular polygons (rotatable envelopes).

　　Members

		Description
	TrackExisting	Indicates if to move or reshape an existing shape on the specified screen in response to a mouse down event.
	TrackNew (IScreenDisplay ScreenDisplay, ISymbol Symbol) 返回值：IGeometry	Call in response to mouse down event to rubberband a new shape on the specified screen. 返回鼠标在屏幕上绘制的几何图形~

//在屏幕上画多边形

private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
    IScreenDisplay pScreenDisplay = axMapControl1.ActiveView.ScreenDisplay;　　//实例 屏幕显示 实例
    IRubberBand pRubber = new RubberPolygon();　　　　　　　　　　　　　　　　//实例一个 多边形橡皮条带
    IPolygon pPolygon = pRubber.TrackNew(pScreenDisplay, null) as IPolygon;　　//获取屏幕鼠标绘制的多边形

    ISimpleLineSymbol pSimpleLineSymbol = new SimpleLineSymbol();　　//定义样式
    pSimpleLineSymbol.Color = GetColor(255, 0, 0);
    pSimpleLineSymbol.Width = 2;

    ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbol();
    pSimpleFillSymbol.Color = GetColor(128, 255, 0);
    pSimpleFillSymbol.Outline = pSimpleLineSymbol;

    pScreenDisplay.StartDrawing(pScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache);　　//开始绘制
    pScreenDisplay.SetSymbol(pSimpleFillSymbol as ISymbol);　　　　　　　　　　//将样式赋值过去
    pScreenDisplay.DrawPolygon(pPolygon);　　　　　　　　　　　　　　　　　　//将几何体赋值过去
    pScreenDisplay.FinishDrawing();　　　　　　　　　　　　　　　　　　　　　　//结束绘制
}

private IRgbColor GetColor(int r, int g, int b)
{
    IRgbColor pColor = new RgbColor();
    pColor.Red = r;
    pColor.Green = g;
    pColor.Blue = b;
    return pColor;
}

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●·● DataSourcesFile 命名空间

1. DataSourcesFile 类库中提供了文件型数据的访问。基于文件的数据源有：shapefile、coverage、TIN、CAD 等。不同的数据源通过各自的工作空间工厂来访问。

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●·● DataSourcesGDB 命名空间

1. DataSourcesGDB 类库包含了对 Geodatabase 数据源的访问，这些数据源包括：MS Access、File Geodatabase 和 ArcSDE 数据源。在访问空间数据之前首先确定数据源的类型，如果是 Geodatabase，那么就需要引用 DataSourcesGDB，如果是文件型的数据源，那么就需要引用 DataSourcesFile。下图描述了 DataSourcesGDB 类库中的几个工作空间工厂之间的关系。

【025】◀▶ ArcObjects 类库（二）

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●·● DataSourcesRaster 命名空间

1. DataSourcesRaster 类库封装了对栅格数据的访问，DataSourcesFile 和 DataSourcesGDB 类库中封装的数据访问接口都是针对矢量数据调用的，对于栅格数据的访问需要使用 DataSourcesRaster 类库，通过该类库用户可以各个 ArcGIS 支持的栅格数据。

ISegment