/// <summary>
/// 复制旧要素图层（只包含选中字段）
/// </summary>
/// <param name="featureWorkspace">要素工作空间</param>
/// <param name="selectionLayer">被复制要素图层</param>
/// <param name="newLayerName">新图层名称</param>
/// <returns></returns>
private IFeatureLayer CopyOldFeatureLayerWithSelectFiled(IFeatureWorkspace featureWorkspace,
IFeatureLayer selectionLayer, string newLayerName)
{
Dictionary <string, int> fidValue = DataTableInfoClass.GetColumnValueDictionary(newAttributeTable, "FID"); //FID值列表
List <string> columnName = DataTableInfoClass.GetAllColumnName(newAttributeTable); //表格所有列名
IWorkspaceEdit workspaceEdit = featureWorkspace as IWorkspaceEdit;
if (workspaceEdit == null)
{
return(null);
}
//开始编辑
StartEdit(workspaceEdit);
try
{
//以旧图层为基础创建新图层要素集合
IFeatureClass newFeatureClass = CreateNewFeatureClass(featureWorkspace, selectionLayer, newLayerName);
//复制旧要素值到新要素集合
CopyFeatureValueToNewFeature(selectionLayer, newFeatureClass, fidValue, columnName);
//停止并保存编辑
EndAndSaveEdit(workspaceEdit);
//删除非选中字段
DeleteFeatureClassFields(newFeatureClass, columnName);
return(FeatureInfoClass.GetFeatureLayer(newFeatureClass));
}
finally
{
//撤销编辑
UndoEdit(workspaceEdit);
}
}
/// <summary>
/// 删除要素
/// </summary>
/// <param name="newAttributeTable">新属性表</param>
private void DeleteFeatures(DataTable newAttributeTable)
{
//FID值
Dictionary <string, int> fidValue = DataTableInfoClass.GetColumnValueDictionary(newAttributeTable, "FID");
IFeatureCursor featureCursor = newLayer.FeatureClass.Search(null, false);
IFeature feature = featureCursor.NextFeature();
while (feature != null)
{
//FID不在新属性表中，则删除
if (!fidValue.ContainsKey(feature.Value[0].ToString()))
{
feature.Delete();
}
feature = featureCursor.NextFeature(); //游标移动
}
}