ArcGIS Engine 10 开发手册(4-19)使用IFeatureSelection接口高亮显示

在介绍 IMap 接口那一节，我们用 IMap 的 IMap.SelectFeature 方法实现了对查询的要素高亮显示，现 在我们用 IFeatureSelection 接口实现查询高亮显示。

详细代码

IMap pMap = axMapControl1.Map;

IFeatureLayer pFeaturelayer = GetLayer (pMap, "Roads") as IFeatureLayer;
IFeatureSelection pFeatureSelection = pFeaturelayer as IFeatureSelection;
IQueryFilter pQuery = new QueryFilterClass ();

pQuery.WhereClause = "TYPE=" + "'paved'";
pFeatureSelection.SelectFeatures (pQuery,  esriSelectionResultEnum.esriSelectionResultNew, false);
axMapControl1.ActiveView.Refresh ();

效果如图

GetLayer 函数

其中 GetLayer 函数是我们写的一个根据图层的名称获取图层的方法，代码如下：

private ILayer GetLayer (IMap pMap, string LayerName)
{
  IEnumLayer pEnunLayer;
  pEnunLayer = pMap.get_Layers (null, false);
  pEnunLayer.Reset ();

  ILayer pRetureLayer;

  pRetureLayer = pEnunLayer.Next();
  while (pRetureLayer != null)
  {
    if (pRetureLayer.Name == LayerName)
    {
      break;
    }
    pRetureLayer = pEnunLayer.Next();
  }
  return pRetureLayer;
}

ArcGIS Engine 10 开发手册全集

ArcGIS Engine 10 开发手册全集： ArcGIS Engine 10 开发手册