ArcEngineC選擇對象取消選擇設(shè)置可選圖層

1、ArcEngine C# 選擇對象、取消選擇、設(shè)置可選圖層 /全局變量public enum enumToolFlag Select IEnumFeature globalEnumFeature; / 選中要素集全局變量private void btnSelect_Click(object sender, EventArgs e) /選擇對象axMapControlMain.MousePointer= esriControlsMousePointer.esriPointerDefault;flag = enumToolFlag.Select;在axMapControl1_OnMouseDown

2、中寫如下代碼：Switch (flag)case enumToolFlag.Select: /選擇元素 /選擇要素IGeometry pGeometry = axMapControlMain.TrackRectangle();IEnvelope pEnv;IActiveView pActiveView = axMapControlMain.ActiveView;/IMap pMap = axMapControlMain.Map;pEnv = pGeometry as IEnvelope;if (pEnv.IsEmpty = true)ESRI.ArcGIS.Display.tagRECT r;

3、r.bottom = e.y + 5;r.top = e.y - 5;r.left = e.x - 5;r.right = e.x + 5;pActiveView.ScreenDisplay.DisplayTransformation.TransformRect(pEnv, ref r, 4);pEnv.SpatialReference = pActiveView.FocusMap.SpatialReference;pGeometry = pEnv as IGeometry;axMapControlMain.Map.ClearSelection();axMapControlMain.Refre

4、sh();axMapControlMain.Map.SelectByShape(pGeometry, null, false);axMapControlMain.Refresh();/獲取選中要素IMap pMap = axMapControlMain.Map;globalEnumFeature = axMapControlMain.Map.FeatureSelection as IEnumFeature;globalEnumFeature.Reset();break;取消選擇：private void btnClearSelect_Click(object sender, EventArgs

5、 e) /取消選擇axMapControlMain.MousePointer= esriControlsMousePointer.esriPointerDefault;axMapControlMain.Map.ClearSelection();axMapControlMain.Refresh();設(shè)置可選圖層：/全局變量中添加string selectedlayerName; / 選擇圖層名private void btnSetSelectLayer_Click(object sender, EventArgs e)try/初始設(shè)置所有圖層不可選ILayer iLayer;IFeatureLa

6、yer iFeatureLayer;for (int i = 0; i < axMapControlMain.LayerCount; i+)iLayer = Tool.GetLayerByName(axMapControlMain.get_Layer(i).Name, axMapControlMain);iFeatureLayer = (IFeatureLayer)iLayer;iFeatureLayer.Selectable = false;frmSetSelectLayer selectLayerFrm;selectLayerFrm = new frmSetSelectLay

7、er(axMapControlMain);selectLayerFrm.ShowDialog();selectedlayerName = selectLayerFrm .selectedLayerName;if (selectedlayerName = null) return;if (selectedlayerName = "所有圖層")for (int i = 0; i < axMapControlMain.LayerCount; i+)iLayer = Tool.GetLayerByName(axMapControlMain.get_La

8、yer(i).Name, axMapControlMain);iFeatureLayer = (IFeatureLayer)iLayer;iFeatureLayer.Selectable = true;elseiLayer = Tool.GetLayerByName(selectedlayerName, axMapControlMain);iFeatureLayer = (IFeatureLayer)iLayer;iFeatureLayer.Selectable = true;catch (Exception ex)MessageBoxEx.Show(ex.ToString();GetLaye

9、rByName函數(shù)：public static ILayer GetLayerByName(string strLyrName, AxMapControl axMapControlMain) ILayer pLayer = null;bool bFindLayer = false;for (int i = 0; i < axMapControlMain.Map.LayerCount; i+)pLayer = axMapControlMain.Map.get_Layer(i);if (pLayer is IGroupLayer | pLayer is ICompositeLayer)ICompositeLayer pComLyr = pLayer as ICompositeLayer;for (int j = 0; j < pComLyr.Count; j+)pLayer = pComLyr.get_Layer(j);if (pLayer.Name.Equals(strLyrN