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ใน event RowDataBound ของ gridview
Protected Sub GridView1_RowDataBound(sender As Object, e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
' check row type
If e.Row.RowType = DataControlRowType.DataRow Then
' if row type is DataRow, add RoomNumber value to TotalSales
TotalRoomNumber += Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, "RoomNumber"))
ElseIf e.Row.RowType = DataControlRowType.Footer Then
' If row type is footer, show calculated total value
e.Row.Cells(4).Text = "รวม"
e.Row.Cells(5).Text = TotalRoomNumber.ToString("d")
e.Row.Cells(4).HorizontalAlign = HorizontalAlign.Center e.Row.Cells(5).HorizontalAlign = HorizontalAlign.Center
e.Row.Font.Bold = True
End If
End Sub
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