AE中Identify查询工具的实现

最新推荐文章于 2023-08-18 19:26:57 发布

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最新推荐文章于 2023-08-18 19:26:57 发布

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原文链接：http://www.cnblogs.com/gisak/archive/2011/04/01/2002349.html

本文介绍了一种基于地图的查询方法，实现点击查询要素并显示其信息。使用了IIdentity、IArray等接口来识别地图上的特定要素，并通过DataGridView展示查询结果。

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主要实现点击查询并闪烁显示，并把查询要素的信息通过DataGridView显示出来，主要用到的接口：

IIdentity、IArray、IIdentifyObj、IFeatureObj、IRowIdentifyObject、IFeature

代码：

Identify

IGroupLayer pGroupLayer = new GroupLayerClass();
for (int i = 0; i < axMapControl1.Map.LayerCount; i++)
{
pGroupLayer.Add(axMapControl1.Map.get_Layer(i));
}
IIdentify pIdentify = pGroupLayer as IIdentify;
IPoint point = new PointClass();
point.PutCoords(e.mapX, e.mapY);

IArray pID = pIdentify.Identify(point);
IFeatureIdentifyObj pFeatIdentifyObj;
IIdentifyObj pIdentifyObj;

pFeatIdentifyObj = pID.get_Element(0) as IFeatureIdentifyObj;
pIdentifyObj = pFeatIdentifyObj as IIdentifyObj;
pIdentifyObj.Flash(axMapControl1.ActiveView.ScreenDisplay);
IRowIdentifyObject pRowObject = pFeatIdentifyObj as IRowIdentifyObject;
IFeature pFeature = pRowObject.Row as IFeature;

DataTable pDatatable = new DataTable();
for (int i = 0; i < pFeature.Fields.FieldCount; i++) //加载每一列字段的名字
{
pDatatable.Columns.Add(pFeature.Fields.get_Field(i).Name);
}
DataRow pDataRow = pDatatable.NewRow(); //加载查询要素的信息
for (int i = 0; i < pFeature.Fields.FieldCount; i++)
{
pDataRow[i] = pFeature.get_Value(i);
}
pDatatable.Rows.Add(pDataRow); //Iden是另外设置的属性窗口
DataGridView pDataGridView = Iden.Get_DataGridView;
pDataGridView.DataSource = pDatatable;
Iden.Show();

转载于:https://www.cnblogs.com/gisak/archive/2011/04/01/2002349.html