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我有一个布局非常独特的页面，其中有 36 个文本框使用表格布局，以便反映展厅的布局以及可以预订哪些展台。通过像这样循环表单键，我已经能够将它们全部无缝地保存到数据库中：

Protected Sub btnUpdate_Click(sender As Object, e As EventArgs) Handles btnUpdate.Click
    Dim tbname As String = ""
    Dim vendorName As String = ""
    Dim formkey As String = ""
    Dim conn As New SqlConnection(ConnectionStrings.Item("WebDB").ConnectionString)
    Dim cmd As New SqlCommand("UPDATE FloorPlan SET VendorName = @VendorName WHERE tbName = @tbName", conn)
        conn.Open()

    For Each o As Object In Request.Form.Keys
        formkey = o.ToString.Replace("ctl00$ContentPlaceHolder1$", "")
        If Left(formkey, 2) = "tb" Then
            tbname = formkey
            vendorName = Request(o.ToString)
            cmd.Parameters.AddWithValue("@VendorName", vendorName)
            cmd.Parameters.AddWithValue("@tbName", tbname)

            cmd.ExecuteNonQuery()
            cmd.Parameters.Clear()
            tbname = ""
            vendorName = ""
        End If
    Next
    conn.Close()
    conn.Dispose()
End Sub

我不知道如何在页面加载时动态加载值，它将在页面上找到文本框 id 并填写值。我试过这样的事情：

For Each r In ds1.Tables("SE").Rows
    CType(FindControl(r("tbname")), TextBox).Text = r("vendorname")
Next

但我只是得到“对象引用未设置为实例......”错误。我应该采取什么方法来正确加载值而无需硬编码tb1.text = "blah",tb2.text = "acme"等...

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1 回答 1

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也许它与嵌套控件或母版页有关？可以尝试 Atwood 的递归查找控制：stackoverflow.com/questions/1457567/c-findcontrol

于 2013-05-31T12:37:11.160 回答