多个 ModalPopups、ValidationSummary 和 UpdatePanel 的问题答案

【问题标题】：Issue with Multiple ModalPopups, ValidationSummary and UpdatePanels多个 ModalPopups、ValidationSummary 和 UpdatePanel 的问题
【发布时间】：2011-02-11 06:16:51
【问题描述】：

当页面包含多个 ModalPopups 每个都包含一个 ValidationSummary 控件时，我遇到了问题。

这是我需要的功能：

用户单击一个按钮，然后出现一个模态弹出窗口，其中包含基于所单击按钮的动态内容。（此功能有效。按钮包含在 UpdatePanel 中，部分页面回发调用 ModalPopup 上的 .Show()）
ModalPopup 中的“保存”按钮会导致客户端验证，然后会导致整页回发，因此整个 ModalPopup 会消失。（ModalPopup 可能会以另一种方式消失 - ModalPopup 只需要在成功保存操作后消失）
如果在保存操作期间代码隐藏中出现错误，则会将消息添加到 ValidationSummary（包含在 ModalPopup 中）并再次显示 ModalPopup。

当 ValidationSummary 添加到 PopupPanel 时，ModalPopups 在第二个 PopupPanel 中的“保存”按钮导致整页回发后不再正确显示。（第一个面板继续正常工作）两个 PopupPanel 都显示出来了，也没有“弹出”，它们是内联显示的。

关于如何解决这个问题的任何想法？

编辑：每个 Popup 的功能都不同 - 这就是为什么必须有两个不同的 ModalPopup。

编辑 2：我收到的 Javascript 错误：

函数 () { Array.remove(Page_ValidationSummaries, document.getElementById(VALIDATION_SUMMARY_ID)); } （功能（） { var fn = 函数 () { AjaxControlToolkit.ModalPopupBehavior.invokeViaServer("MODAL_POPUP_ID", true); Sys.Application.remove_load(fn); }; Sys.Application.add_load(fn); }) 不是函数

缺少“;”在注入的javascript中。看下面的答案

错误状态图片（点击“PostBack Popup2”按钮后）

ASPX 标记

<asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <%--*********************************************************************
        Popup1
        *********************************************************************--%>
    <asp:UpdatePanel ID="Popup1ShowButtonUpdatePanel" runat="server">
        <ContentTemplate>
            <%--This button will cause a partial page postback and pass a parameter to the Popup1ModalPopup in code behind
            and call its .Show() method to make it visible--%>
            <asp:Button ID="Popup1ShowButton" runat="server" Text="Show Popup1" OnClick="Popup1ShowButton_Click"
                CommandArgument="1" />
        </ContentTemplate>
    </asp:UpdatePanel>
    <%--Hidden Control is used as ModalPopup's TargetControlID .Usually this is the ID of control that causes the Popup,
        but we want to control the modal popup from code behind --%>
    <asp:HiddenField ID="Popup1ModalPopupTargetControl" runat="server" />
    <ajax:ModalPopupExtender ID="Popup1ModalPopup" runat="server" TargetControlID="Popup1ModalPopupTargetControl"
        PopupControlID="Popup1PopupControl" CancelControlID="Popup1CancelButton">
    </ajax:ModalPopupExtender>
    <asp:Panel ID="Popup1PopupControl" runat="server" CssClass="ModalPopup" Style="width: 600px;
        background-color: #FFFFFF; border: solid 1px #000000;">
        <%--This button causes validation and a full-page post back.  Full page postback will causes the ModalPopup to be Hid.
            If there are errors in code behind, the code behind will add a message to the ValidationSummary,
            and make the ModalPopup visible again--%>
        <asp:Button ID="Popup1PostBackButton" runat="server" Text="PostBack Popup1" OnClick="Popup1PostBackButton_Click" />&nbsp;
        <asp:Button ID="Popup1CancelButton" runat="server" Text="Cancel Popup1" />
        <asp:UpdatePanel ID="Popup1UpdatePanel" runat="server">
            <ContentTemplate>
                <%--*************ISSUE HERE***************
                The two ValidationSummary's are causing an issue.  When the second ModalPopup's PostBack button is clicked,
                Both ModalPopup's become visible, but neither are "Popped-Up".
                If ValidationSummary's are removed, both ModalPopups Function Correctly--%>
                <asp:ValidationSummary ID="Popup1ValidationSummary" runat="server" />
                <%--Will display dynamically passed paramter during partial page post-back--%>
                Popup1 Parameter:<asp:Literal ID="Popup1Parameter" runat="server"></asp:Literal><br />
            </ContentTemplate>
        </asp:UpdatePanel>
        &nbsp;<br />
        &nbsp;<br />
        &nbsp;<br />
    </asp:Panel>
    &nbsp;<br />
    &nbsp;<br />
    &nbsp;<br />
    <%--*********************************************************************
        Popup2
        *********************************************************************--%>
    <asp:UpdatePanel ID="Popup2ShowButtonUpdatePanel" runat="server">
        <ContentTemplate>
            <%--This button will cause a partial page postback and pass a parameter to the Popup2ModalPopup in code behind
            and call its .Show() method to make it visible--%>
            <asp:Button ID="Popup2ShowButton" runat="server" Text="Show Popup2" OnClick="Popup2ShowButton_Click"
                CommandArgument="2" />
        </ContentTemplate>
    </asp:UpdatePanel>
    <%--Hidden Control is used as ModalPopup's TargetControlID .Usually this is the ID of control that causes the Popup,
        but we want to control the modal popup from code behind --%>
    <asp:HiddenField ID="Popup2ModalPopupTargetControl" runat="server" />
    <ajax:ModalPopupExtender ID="Popup2ModalPopup" runat="server" TargetControlID="Popup2ModalPopupTargetControl"
        PopupControlID="Popup2PopupControl" CancelControlID="Popup2CancelButton">
    </ajax:ModalPopupExtender>
    <asp:Panel ID="Popup2PopupControl" runat="server" CssClass="ModalPopup" Style="width: 600px;
        background-color: #FFFFFF; border: solid 1px #000000;">
        <%--This button causes validation and a full-page post back.  Full page postback will causes the ModalPopup to be Hid.
            If there are errors in code behind, the code behind will add a message to the ValidationSummary,
            and make the ModalPopup visible again--%>
        <asp:Button ID="Popup2PostBackButton" runat="server" Text="PostBack Popup2" OnClick="Popup2PostBackButton_Click" />&nbsp;
        <asp:Button ID="Popup2CancelButton" runat="server" Text="Cancel Popup2" />
        <asp:UpdatePanel ID="Popup2UpdatePanel" runat="server">
            <ContentTemplate>
                <%--*************ISSUE HERE***************
                The two ValidationSummary's are causing an issue.  When the second ModalPopup's PostBack button is clicked,
                Both ModalPopup's become visible, but neither are "Popped-Up".
                If ValidationSummary's are removed, both ModalPopups Function Correctly--%>
                <asp:ValidationSummary ID="Popup2ValidationSummary" runat="server" />
                <%--Will display dynamically passed paramter during partial page post-back--%>
                Popup2 Parameter:<asp:Literal ID="Popup2Parameter" runat="server"></asp:Literal><br />
            </ContentTemplate>
        </asp:UpdatePanel>
        &nbsp;<br />
        &nbsp;<br />
        &nbsp;<br />
    </asp:Panel>

代码背后

protected void Popup1ShowButton_Click(object sender, EventArgs e)
    {
        Button btn = sender as Button;

        //Dynamically pass parameter to ModalPopup during partial page postback
        Popup1Parameter.Text = btn.CommandArgument;
        Popup1ModalPopup.Show();
    }
    protected void Popup1PostBackButton_Click(object sender, EventArgs e)
    {
        //if there is an error, add a message to the validation summary and
        //show the ModalPopup again

        //TODO: add message to validation summary

        //show ModalPopup after page refresh (request/response)
        Popup1ModalPopup.Show();
    }


    protected void Popup2ShowButton_Click(object sender, EventArgs e)
    {
        Button btn = sender as Button;

        //Dynamically pass parameter to ModalPopup during partial page postback
        Popup2Parameter.Text = btn.CommandArgument;
        Popup2ModalPopup.Show();
    }
    protected void Popup2PostBackButton_Click(object sender, EventArgs e)
    {
        //***********After This is when the issue appears**********************

        //if there is an error, add a message to the validation summary and
        //show the ModalPopup again

        //TODO: add message to validation summary

        //show ModalPopup after page refresh (request/response)
        Popup2ModalPopup.Show();
    }

【问题讨论】：

标签： asp.net updatepanel ajaxcontroltoolkit modalpopupextender validationsummary

【解决方案1】：

这是同时使用 ValidationSummary 和 ModalPopup 的问题。

请看这里：http://ajaxcontroltoolkit.codeplex.com/WorkItem/View.aspx?WorkItemId=12835

问题是缺少“;”在两个注入脚本之间。

他们的解决方案是创建/使用继承自 ValidationSummary 的自定义服务器控件，该控件注入“;”进入页面启动脚本修复bug：

[ToolboxData("")]
public class AjaxValidationSummary : ValidationSummary
{
  protected override void OnPreRender(EventArgs e)
  {
    base.OnPreRender(e);
    ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), this.ClientID, ";", true);
  }
}

【讨论】：

是否可以在不创建自定义控件的情况下解决此问题？
哇——我记录下来只是为了说“哇”。

【解决方案2】：

将所有<asp:ValidationSummary 控件放在文档末尾。错误将得到解决。

【讨论】：

【解决方案3】：

您是否为每个弹出窗口设置了不同的“ValidationGroup”（ValidationSummary + 验证器）？

【讨论】：

是的，使用了 ValidationGroup。

【解决方案4】：

在面板中带有验证摘要的模态弹出扩展器中似乎存在错误。为了避免这种情况，请始终将验证摘要模式弹出扩展器和面板放在代码底部。在页面底部添加相应的代码

Popup1 参数：

【讨论】：