Asp.net 如何在gridview中获取编辑文本框的ID

我想获得一个文本框的ID，如下面所示，以添加验证程序，客户端ID包含生成的字符串，也是UniqueID，但只有ID不包含任何内容，为什么

Protected Sub GridView1_RowDataBound(ByVal sender As GridView, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

    'Manipulate only editing row.
    If e.Row.RowType = DataControlRowType.DataRow Then
        If sender.EditIndex = e.Row.RowIndex Then

            'Search textbox and add validators.
            For Each cell As TableCell In e.Row.Cells                
                If cell.Controls.Count = 1 AndAlso TypeOf (cell.Controls(0)) Is TextBox Then
                    Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)

                    'txt.ID is nothing...why?
                    SetValidators(cell.Controls, txt.ID)
                End If
            Next
        End If
    End If
End Sub

---

如果适用于您的应用程序，这里有一个变通方法

Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)

                //'txt.ID is nothing...why?
                 // Here you can assign new ID to your control as per your logic

                    txt.ID = "newID"; 
                   SetValidators(cell.Controls, txt.ID)

---

您可以尝试以下代码将验证程序控件分配给gridview控件。 我不确定您如何使用

SetValidators（）

函数

Protected Sub GridView1_RowDataBound(ByVal sender As GridView, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

    'Manipulate only editing row.
    If e.Row.RowType = DataControlRowType.DataRow Then
        If sender.EditIndex = e.Row.RowIndex Then

            'Search textbox and add validators.
            For Each cell As TableCell In e.Row.Cells                
                If cell.Controls.Count = 1 AndAlso TypeOf (cell.Controls(0)) Is TextBox Then
                    Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)

                    'txt.ID is nothing...why?
                    SetValidators(cell.Controls, txt.ClientID)
                End If
            Next
        End If
    End If
End Sub

---

最后，我通过应用下面的变通方法解决了这个问题

            Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)

            'The ID is generated by to refer ClientID.
            Dim foo = txt.ClientID

            'Therefore, already txt.ID is not nothing.
            SetValidators(cell.Controls, txt.ID)

---

谢谢您的合作。

为什么要在代码隐藏中这样做？您可以在表单视图中执行这些操作。\n大约有20个目标表要编辑，所以我想自动生成。您确定要在更新模式下执行代码吗？你确定你给文本框分配了ID吗？不，我没有给文本框分配ID。因为GridView会自动生成它们。所以在文本框生成块中添加验证器。谢谢。但我已经尝试过这种解决方法，如果适用，所有列都将更新为null…@JumpeiTanaka您是说您正在分配

RequiredFieldValidators

它不起作用。不，我是说输入值将消失，并更新为null。@JumpeiTanaka Ok！是的，这将导致分配新id，并且您可能正在使用旧值进行更新。它太长，无法显示，但仅添加验证程序。我想将txt.ID设置为

RegularExpressionValidator.ControlToValidate

。在上面应用之后，发生了此异常。找不到在“VldtBytesgvMainte_ctl02_6”的“ControlToValidate”属性中引用的控件ID“gvMainte_ctl02_6”。