suoermap的object.net循环遍历属性表，从数据库取数据进行更新属性字段值

 /// </summary>
         /// <param name="sName">图层名</param>
         /// <param name="stationID">测站编码</param>
         /// <param name="evalue">值</param>
         public static void QueryLayerAttribute(string sName,string stationID,double evalue)
         {
             if (null!=sName)
             {
                 Layer layer = m_mapControl.Map.Layers[sName];//获取图层
                 if(null!=layer)
                 {
                     DatasetVector dataset = layer.Dataset as DatasetVector;
                     Recordset recordset = dataset.GetRecordset(false, CursorType.Dynamic);
                     recordset.MoveFirst();
                     if (null != dataset)
                     {
                         for (int i = ; i < recordset.RecordCount; i++)//遍历属性表
                         {
                             string station = recordset.GetFieldValue("stationID").ToString();

                             if (stationID == station)
                             {
                                 recordset.Edit();
                                 recordset.SetFieldValue("eValue", evalue);
                                 recordset.Update();
                                 return;
                             }
                             recordset.MoveNext();
                         }

                     }
                 }
             }
             m_mapControl.Refresh();
         }