void mCtrl_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
{
#region 框选
if (e.button == 4)
{
IEnvelope pEnvelope = mCtrl.TrackRectangle(); // 通过鼠标，取得一个包络线对象
ISelectionEnvironment pSelectionEnv = new SelectionEnvironmentClass(); // 设置一个新环境
pSelectionEnv.DefaultColor = MapHelper.GetRGBColor(Color.Red); // 再改变原来要素的眼神值
mCtrl.Map.SelectByShape(pEnvelope, pSelectionEnv, false);
mCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
ISelection selection = mCtrl.Map.FeatureSelection;
IEnumFeatureSetup enumFeatureSetup = selection as IEnumFeatureSetup; //这里很必要
enumFeatureSetup.AllFields = true; //这里很必要
IEnumFeature enumFeature = enumFeatureSetup as IEnumFeature;
enumFeature.Reset();
IFeature feature = enumFeature.Next();
IFeatureLayer pFeatureLayer = (IFeatureLayer)mCtrl.get_Layer(currentLayerIndex);
IFeatureClass pFeatureClass = (IFeatureClass)pFeatureLayer.FeatureClass;
int fLCDIdx = pFeatureClass.FindField(fieldName);
lbFields.Items.Clear();
while (feature != null)
{
var _lcd = feature.get_Value(fLCDIdx);
long lcd = Convert.ToInt64(_lcd);
lbFields.Items.Add(lcd);
feature = enumFeature.Next();
}
}
#endregion
mCtrl.Refresh(esriViewDrawPhase.esriViewForeground, Type.Missing, Type.Missing);
}
