Question

为什么我的按钮在更新面板中不起作用，但是如果按“输入”键它可以正常工作？

        <asp:ScriptManager ID="Sqrpt1" runat="server"></asp:ScriptManager>
        <asp:UpdatePanel UpdateMode="Always" ChildrenAsTriggers="true"  ID="updpan" runat="server"><ContentTemplate>
        <fieldset>
        <asp:Panel runat="server" ID="ClientSearchPa" DefaultButton="SearchClientPopup">
        <asp:TextBox ID="SearchClientBox" runat="server"></asp:TextBox>
&nbsp;<asp:Button ID="SearchClientPopup" runat="server" Text="Search" 
                onclick="SearchClientPopup_Click" /></asp:Panel>
        <br />
        <asp:ListBox ID="Clients" runat="server" Height="341px" Width="682px"></asp:ListBox>   

        <br />
        <br />
            <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
           <asp:Button ID="ClientSelect" runat="server" OnClick="ClientSelect_Click" Text="button" /> 
           </fieldset> 
        </ContentTemplate>
        </asp:UpdatePanel>

Answer 1

您的代码完全没问题，按钮在服务器端触发事件会更改服务器事件中的某些控件值。您可能没有注意到ajax调用的快速响应

  protected void SearchClientPopup_Click(object sender, EventArgs e)
    {
        SearchClientBox.Text = "Hello ajax SearchClient clicked";
    }
    protected void ClientSelect_Click(object sender, EventArgs e)
    {
        SearchClientBox.Text = "Hello ajax ClientSelect cliecked ";
    }

Answer 2

<asp:Panel runat="server" ID="ClientSearchPa" DefaultButton="SearchClientPopup"> 
<asp:TextBox ID="SearchClientBox" runat="server"></asp:TextBox> &nbsp;
<asp:Button ID="SearchClientPopup" runat="server" Text="Search" onclick=

“SearchClientPopup_Click”/＆gt;

 </asp:Panel>

此处DefaultButton设置为SearchClientPopup.So如果焦点位于Panel中的任何控件上，则Enter键将起作用，而SearchClientPopup将触发click事件。

     <asp:Button ID="ClientSelect" runat="server" OnClick="ClientSelect_Click" Text="button" />

此按钮不在面板控件内。因此，您必须通过单击

显式触发它

c＃UpdatePanel按钮单击将无法正常工作

2 个答案: