Dears:

We need a checkBox in the first column to that we can decide witch row will be deleted or updated,And of course we use a checkBox in the header to Make All the Checkbox Checked.

Now I show you my code in js:

function Grid_SelectAll(UltraWebGrid, CheckBox) {
    //oUWGrid代表GRID的名称,客户端可以取到(方法:o+GRID的ID)
    var oGrid = UltraWebGrid;

    var oRows = oGrid.Rows;

  for (i = 0; i < oRows.length; i++) {
     var row=oRows.getRow(i);
     var cell=row.getCellFromKey("CHECK");
        if (cell.isEditable()) {
            cell.setValue(CheckBox.checked);
        }
    }
}

when the row's count more than 50,we fill feel that it is slow,and more rows more slow.

can you give me someother methods to resolve this problem

Thanks!