Frameworks 如何验证asp.net中的某些动态表格单元格

如下面的代码所示，我需要创建一个动态表，其中每个单元格都会得到验证。如果有任何错误的输入，将弹出该特定单元格的错误消息。现在我们的BA不想为每一列显示多条错误消息。无论有多少姓氏无效，只需为每列显示一条错误消息，如“姓氏无效”。我怎样才能做到这一点？可能吗

提前谢谢。我将非常感谢你的回复

谢谢， Dev2016

Protected Sub ShowBoxes(ByVal startRow As Integer, ByVal nRowsAdd As Integer)

    Dim d As Integer = 10
    For d = startRow To (startRow + nRowsAdd - 1)
        Dim row As New HtmlTableRow()
        row.VAlign = "center"
        row.Attributes("class") = "bgA"
        row.ID = "IndivRow_" & d.ToString
        Dim col1 As New HtmlTableCell()
        col1.Align = "center"
        col1.Width = 29
        col1.InnerHtml = (d + 1).ToString
        Dim col2 As New HtmlTableCell()
        col2.Width = 53
        col2.VAlign = "left"
        Dim txt2 As New TextBox()
        txt2.ID = "Last_" & d.ToString
        txt2.Columns = "29"
        txt2.MaxLength = "30"
        Dim reg2 As New RegularExpressionValidator()
        reg2.ID = "regLast_" & d.ToString
        reg2.ControlToValidate = "Last_" & d.ToString
        reg2.ValidationExpression = "^[a-zA-Z0-9""()-. '\s]{1,50}$"
        reg2.ErrorMessage = "Last Name on line " & (d + 1).ToString & " contains invalid characters."
        reg2.Text = "*"
        reg2.Display = ValidatorDisplay.Static
        reg2.ValidationGroup = "SubmitFormClient"
        reg2.SetFocusOnError = True
        col2.Controls.Add(txt2)
        col2.Controls.Add(reg2)
        Dim col3 As New HtmlTableCell()
        col3.Width = 53
        col3.VAlign = "left"
        Dim txt3 As New TextBox()
        txt3.ID = "First_" & d.ToString
        txt3.MaxLength = "30"
        Dim reg3 As New RegularExpressionValidator()
        reg3.ID = "regFirst_" & d.ToString
        reg3.ControlToValidate = "First_" & d.ToString
        reg3.ValidationExpression = "^[a-zA-Z0-9""()-. '\s]{1,50}$"
        reg3.ErrorMessage = "First Name on line " & (d + 1).ToString & " contains invalid characters."
        reg3.Text = "*"
        reg3.Display = ValidatorDisplay.Static
        reg3.ValidationGroup = "SubmitFormClient"
        reg3.SetFocusOnError = True
        col3.Controls.Add(txt3)
        col3.controls.add(reg3)

        row.Cells.Add(col1)
        row.Cells.Add(col2)
        row.Cells.Add(col3)
        tableIndiv.Rows.Add(row)
    Next d
End Sub