在Airgis中怎么显示选中的行数，对Airgis零知识，但是任务要完成。

Question

string whereClause = (_ResultLayer as IFeatureLayerDefinition).DefinitionExpression;
string tableName = StaticSystemAOClass.AOComm.GetDataSetName(_ResultLayer.FeatureClass);
string sql = string.Format("select * from {0}", tableName);
DataTable dt = WFSysParaClass.SysDbCtrl.GetDataTable(sql);
this.gvMain.CollapseAllGroups();
this.gcMain.DataSource = tableName;
return false;
这是显示数据到界面的代码