如何在gridview中获取动态添加文本框的值。得到一个错误，引用对象的值为nothing

Question

我添加了Textbox 受保护的子gvReconciliation_RowDataBound（发件人为对象，e为GridViewRowEventArgs）处理gvReconciliation.RowDataBound

    If e.Row.RowType = DataControlRowType.DataRow Then

        Dim txtRemarks As New TextBox()
        txtRemarks.ID = "txtRemarks"
        txtRemarks.Text = TryCast(e.Row.DataItem, DataRowView).Row("Remarks").ToString()
        e.Row.Cells(10).Controls.Add(txtRemarks)


    End If

End Sub