ArcToolBox工具栏上添加自定义工具或命令

工具类：继承于BaseTool，若为命令，则继承于BaseCommand。

using ESRI.ArcGIS.ADF.BaseClasses;//该引用不同于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//若为命令，继承于BaseCommand
{ 
    IMapControl3 mapControl;
    private IHookHelper m_HookHelper = new HookHelperClass();
    public SearchData()
    {
        //设置工具按钮的属性
        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("中文名称")).ToString();
                dataForm.Show();
                this.mapControl.FlashShape(pFeature.Shape, 3, 200, null);
            }
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message);
        }
    }
}

工具或命令添加到ArcToolBar上：

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

效果图：

ps:从自定义工具或命令中访问MapControl，可以先从hook得到ArcToolBar，进而通过buddy属性得到mapcontrol。