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/arxive/p/6109871.html

本文介绍在ArcGIS Engine (AE) 中如何使用Identify工具实现点击查询功能，并展示查询结果。主要通过IIdentity等接口实现了地图要素的闪烁显示及信息提取，并通过DataGridView展示查询结果。

原文 AE中Identify查询工具的实现

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

 
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();