CAD定义图块（com接口c#语言）
定义图块
c#将选中的实体做成块实现代码：
MxDrawSelectionSet ss = new MxDrawSelectionSet();
ss.Select(MCAD_McSelect.mcSelectionSetUserSelect, null, null, null);
List<Int64> aryId = new List<Int64>();
for (Int32 i = 0; i < ss.Count; i++)
{
MxDrawEntity ent = ss.Item(i);
if (ent != null)
{
aryId.Add(ent.ObjectID);
ent.Close();
}
}
MxDrawDatabase curDatabase = (MxDrawDatabase)(mxdraw.GetDatabase());
double dMinX = 0, dMinY = 0, dMaxX = 0, dMaxY = 0;
bool isFirstEnt = true;
for (int l = 0; l < aryId.Count; l++)
{
MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId[l]);
if (pObj == null)
continue;
MxDrawPoint pt1Ob, pt2Ob;
MxDrawEntity pEnt = (MxDrawEntity)pObj;
if (pEnt == null)
continue;
pEnt.GetBoundingBox(out pt1Ob, out pt2Ob);
MxDrawPoint minPt = (MxDrawPoint)pt1Ob;
MxDrawPoint maxPt = (MxDrawPoint)pt2Ob;
if (minPt != null && maxPt != null)
{
if(isFirstEnt)
{
dMinX = minPt.x;
dMinY = minPt.y;
dMaxX = maxPt.x;
dMaxY = maxPt.y;
isFirstEnt = false;
}
else
{
if (dMinX > minPt.x)
dMinX = minPt.x;
if (dMinY > minPt.y)
dMinY = minPt.y;
if (dMaxX < maxPt.x)
dMaxX = maxPt.x;
if (dMaxY < maxPt.y)
dMaxY = maxPt.y;
}
}
}
if(isFirstEnt)
{
// 没有实体
return 0;
}
MxDrawPoint pos = new MxDrawPoint();
pos.x = dMinX + (dMaxX - dMinX) / 2.0;
pos.y = dMinY + (dMaxY - dMinY) / 2.0;
// 检查新创建的块名，在当前数据库是否已经存在.
MxDrawBlockTable blkTable = curDatabase.GetBlockTable();
MxDrawBlockTableRecord curSpace = curDatabase.CurrentSpace();
String sNewBlakName;
MxDrawBlockTableRecord blkNewRec = blkTable.Add("");
sNewBlakName = blkNewRec.Name;
blkNewRec.Origin = pos;
for (int l = 0; l < aryId.Count; l++)
{
blkNewRec.AddCloneEntity(aryId[l]);
// 把以前实体删除 。
MxDrawMcDbObject pObj = curDatabase.ObjectIdToObject(aryId[l]);
if (pObj == null)
continue;
pObj.Erase();
}
if (blkNewRec != null)
{
MxDrawBlockReference blkRef = curSpace.InsertBlock(pos.x,pos.y, sNewBlakName, 1.0, 0.0);
MxDrawAttribute attrib = blkRef.AppendAttribute();
attrib.Position = pos;
attrib.AlignmentPoint = pos;
attrib.Oblique = 0.0;
attrib.Rotation = 0.0;
attrib.Height = 2.0;
attrib.TrueColor.SetRGB(255,0,0);
// attrib.TextString = "这是一个属性文字的测试";
attrib.Tag = "TestTag";
attrib.IsInvisible = false;
blkRef.Position = blkRef.Position;
return blkRef.ObjectID;
}
return 0;
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