工具類：繼承於BaseTool，若為命令，則繼承於BaseCommand。

using ESRI.ArcGIS.ADF.BaseClasses;//該引用不同於AO9.2 using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Controls; using System.Windows.Forms; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Geodatabase; using System; using WorldMap; public sealed class SearchData : BaseTool//若為命令，繼承於BaseCommand { IMapControl3 mapControl; private IHookHelper m_HookHelper = new HookHelperClass(); public SearchData() { //設定工具按鈕的屬性 base.m_caption = "Search Data"; base.m_toolTip = "Search Data"; base.m_message = "Search Data"; base.m_name = "Search Data"; base.m_cursor = Cursors.Help; try { base.m_bitmap = new System.Drawing.Bitmap(Application.StartupPath + @"/icon/search3.bmp"); } catch { MessageBox.Show(this.Name+Environment.NewLine+"BitMap path is wrong!"); } } public override void OnCreate(object hook) { m_HookHelper.Hook = hook; if (hook is IToolbarControl) { IToolbarControl toolbarControl = (IToolbarControl) hook; mapControl = (IMapControl3) toolbarControl.Buddy; } } public override bool Enabled { get { if(m_HookHelper.FocusMap == null) return false; return true; } } //在MapControl上的事件 public override void OnMouseDown(int Button, int Shift, int X, int Y) { //Identify功能 try { IPoint pPoint; IFeatureLayer pFeatureLayer; ISpatialFilter pSpatialFilter; IFeatureSelection pFeatureSelection; ICursor pCursor; IFeature pFeature; ISelectionSet pSelectionSet; pPoint = this.mapControl.ToMapPoint(X, Y); pFeatureLayer = (IFeatureLayer)this.mapControl.get_Layer(3); pFeatureSelection = (IFeatureSelection)pFeatureLayer; pSpatialFilter = new SpatialFilterClass(); pSpatialFilter.Geometry = (IGeometry)pPoint; pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects; this.mapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null); pFeatureSelection.SelectFeatures(pSpatialFilter, esriSelectionResultEnum.esriSelectionResultNew, true); this.mapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null); pSelectionSet = pFeatureSelection.SelectionSet; pSelectionSet.Search(null, false, out pCursor); pFeature = (IFeature)pCursor.NextRow(); if (pFeature != null) { IFields pFields = pFeatureLayer.FeatureClass.Fields; DataForm dataForm = DataForm.NewForm(); dataForm.textBox1.Text = pFeature.get_Value(pFields.FindField("中文名稱")).ToString(); dataForm.Show(); this.mapControl.FlashShape(pFeature.Shape, 3, 200, null); } } catch (Exception e) { MessageBox.Show(e.Message); } } }

工具或命令新增到ArcToolBar上：

axToolbarControl1.AddItem(new SearchData(), 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly); 

效果圖：

ps:從自定義工具或命令中訪問MapControl，可以先從hook得到ArcToolBar，進而通過buddy屬性得到mapcontrol。