图层元素识别

图层元素识别，用于点选或者框选

// 接受识别数据的数组

IArray pIDArray;

/// 创建包络区域

IEnvelope pEnv;

/// 包络区域的四个边界的指定

r.bottom = e.y + 5;

r.top = e.y - 5;

r.left = e.x - 5;

r.right = e.x + 5;

//也可以自定义画框来识别

// pEnv = axMapControl1.TrackRectangle();

// 创建识别接口，并将要识别的图层定义为识别接口

IIdentify pIdentify;

pIdentify = (IIdentify)GetGallery(this.ActiveGallery);

pIDArray = pIdentify.Identify(pEnv);

IFeatureIdentifyObj pFeatIdObj;

pFeatIdObj = (IFeatureIdentifyObj)pIDArray.get_Element(0);

IIdentifyObj pIdObj = (IIdentifyObj)pFeatIdObj;

IFeature pFeature = pRowObj.Row as IFeature;