Question

问题：当郊区下拉列表值更改时 - 页面正在回发。

期望的结果：更改下拉列表中的值更新邮政编码文本框值而不回页（邮政编码文本框通常是隐藏的）

网页代码：

<asp:ScriptManager ID="ScriptManager1" runat="server" />
            <asp:DropDownList ID="Suburb" runat="server" DataTextField="LocalityPhrase" 
      DataValueField="Locality"  AutoPostBack="true"  class="DropDown" OnSelectedIndexChanged="Suburb_SelectedIndexChanged"/>
      <asp:UpdatePanel runat="server" id="UpdatePanelPostCode" UpdateMode="Conditional">
      <ContentTemplate>
      <asp:TextBox ID="Postcode" runat="server" Visible="true"/>
      </ContentTemplate>
      <Triggers>
                <asp:AsyncPostBackTrigger  ControlID="Suburb" EventName="SelectedIndexChanged" />
            </Triggers>
        </asp:UpdatePanel>

代码背后：

Protected Sub Suburb_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Suburb.SelectedIndexChanged
        'get postcode from suburb drop down
        Dim pCode As String = ""
        If Suburb.SelectedValue <> "" Then
            pCode = Suburb.SelectedItem.Text.Substring(Len(Suburb.SelectedItem.Text) - 5, 4)
        End If
        Postcode.Text = pCode
End Sub

Answer 1

我的安装AJAX工具包似乎有问题。在Visual Studio（2008）中删除并重新加载它，一切都很好。

Ajax更新面板 - 我缺少什么？

1 个答案: