模态弹出窗口不生成回发到页面

Question

<ajaxToolkit:ModalPopupExtender  runat="server" 
         id="ModalPopupExtender1"
         cancelcontrolid="btnCancel" okcontrolid="btnOkay" 
         targetcontrolid="Button1" popupcontrolid="Panel1" 
         drag="true" 
         backgroundcssclass="ModalPopupBG"
        />

<asp:Button ID="Button1" runat="server" Text="Test Modal Popup" 
    onclick="Button1_Click" />
    <br />

<asp:UpdatePanel ID="up" runat="server">
    <ContentTemplate>
        <asp:Button ID="Button2" runat="server" Text="Post Back" 
        onclick="Button2_Click" />
        <asp:Label ID="Label1" runat="server" AutoPostBack="true" Text="Nothing has happened yet..."></asp:Label>

        <asp:Panel ID="Panel1" runat="server" AutoPostBack="true">
            <div class="HellowWorldPopup">
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                <asp:Button ID="btnCancel" runat="server" Text="Canel" 
                    onclick="btnCancel_Click" />
                <asp:Button ID="btnOkay" runat="server" Text="Okay" onclick="btnOkay_Click" />
            </div>
        </asp:Panel>

    </ContentTemplate>
</asp:UpdatePanel>

所以我试图让标签包含用户在模式弹出窗口内的文本框中键入的内容。现在btnOkay 无法正常工作。

.cs文件：

protected void btnCancel_Click(object sender, EventArgs e)
{
    TextBox1.Text = "";
}
protected void btnOkay_Click(object sender, EventArgs e)
{
    Label1.Text = TextBox1.Text;
    TextBox1.AutoPostBack = true;
}
protected void Button1_Click(object sender, EventArgs e)
{
    Label1.Text = "";
    TextBox1.Text = "";
}
protected void Button2_Click(object sender, EventArgs e)
{
    Label1.Text = "You clicked the button";
}

我根本不希望页面回发，而只是在输入信息后更新页面上的隐藏标签。我该怎么做？

Answer 1

编辑： 好吧，我认为这应该可以解决问题。

<ajax:ModalPopupExtender runat="server" id="ModalPopupExtender1" targetcontrolid="Button1"
    popupcontrolid="Panel1" drag="true" backgroundcssclass="ModalPopupBG"  />
<asp:Button ID="Button1" runat="server" Text="Test Modal Popup" /><br />
<asp:Panel ID="Panel1" runat="server">
    <div class="HellowWorldPopup">
        <asp:TextBox ID="TextBox1" runat="server" />
        <asp:Button ID="btnCancel" runat="server" Text="Canel" onclick="btnCancel_Click" />
        <asp:Button ID="btnOkay" runat="server" Text="Okay" onclick="btnOkay_Click" />
    </div>
</asp:Panel>

<asp:UpdatePanel ID="up" runat="server" UpdateMode="Conditional">
    <ContentTemplate>
        <asp:Label ID="Label1" runat="server" Text="Nothing has happened yet..." />
    </ContentTemplate>
</asp:UpdatePanel>

.

protected void btnCancel_Click(object sender, EventArgs e)
{
    TextBox1.Text = ""; 
}

protected void btnOkay_Click(object sender, EventArgs e)
{
    Label1.Text = TextBox1.Text;
    up.Update();
}