123 dfgfdg df gf dg fg dfg fd g dfg fd g fdg dfg df g df gdfg df g dfg dfgdf gdf g fd gfd-123

动态增加或减少DataGrid列的显示，这样可以在大的DataGrid中，显示出用户需要的列。-DataGrid columns dynamically increase or decrease the display, which can in large DataGrid, the column shows the user needs.