利用 IIdentifyDialog 模拟ArcMap工具里面 Identify功能进行要素查询
利用AE提供的IIdentifyDialog,创建class identifyTool 。然后在程序里面就可以在鼠标点击按钮功能下,模拟实现ArcMap工具里面 Identify功能。
类生成代码如下:
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public sealed class identifyTool : BaseTool
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{
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IHookHelper pHookHelper = new HookHelperClass();
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public identifyTool()
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{
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m_cursor = new System.Windows.Forms.Cursor(@"..\..\Resources\Identify_md.cur");
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}
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public override void OnCreate(object hook)
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{
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pHookHelper.Hook = hook;
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}
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public override void OnMouseDown(int Button, int Shift, int X, int Y)
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{
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IActiveView pActiveView;
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IIdentifyDialog pIdentifyDialog;
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IIdentifyDialogProps pIdentifyDialogProps;
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IEnumLayer pEnumLayer;
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ILayer pLayer;
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pActiveView = pHookHelper.ActiveView;
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pIdentifyDialog = new IdentifyDialogClass();
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pIdentifyDialogProps = pIdentifyDialog as IIdentifyDialogProps;
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pIdentifyDialog.Map = pHookHelper.ActiveView.FocusMap;
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pIdentifyDialog.Display = pActiveView.ScreenDisplay;
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pIdentifyDialog.ClearLayers();
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pEnumLayer = pIdentifyDialogProps.Layers;
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pEnumLayer.Reset();
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pLayer = pEnumLayer.Next();
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while (pLayer != null)
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{
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pIdentifyDialog.AddLayerIdentifyPoint(pLayer, X, Y);
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pLayer = pEnumLayer.Next();
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}
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pIdentifyDialog.Show();
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}
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}

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其中m_cursor用来设置鼠标样式。
IIdentifyDialog要设置其Map和Display属性。
(参考ESRI中国社区)