arcengine 讀取屬性工作表資料

       static public DataTable GetLayerData(IFeatureLayer layer)        {            DataTable dt =   new DataTable();            Dictionary<string ,int> columnKey=new Dictionary<string, int>();            List<string> columns = Lib.Layer.getLayerField(layer);            for(int i=0;i<columns.Count;i++)            {                if (columns[i] != "FID" && columns[i] != "Shape")                {                    dt.Columns.Add(columns[i]);                    columnKey.Add(columns[i], i);                }            }            int fragFetureCount = layer.FeatureClass.FeatureCount(null);            for (int i = 0; i < fragFetureCount; i++)            {                DataRow dr = dt.NewRow();                IFeature pFeature = layer.FeatureClass.GetFeature(i);               for (int j = 0; j < dt.Columns.Count; j++)               {                   int index = columnKey[dt.Columns[j].ColumnName];                   dr[j] = pFeature.get_Value(index);               }                dt.Rows.Add(dr);            }            return dt;        }