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我正在开发一个ASP.NETWeb 应用程序。我在其中添加了一个ascx带有asp:updatepanel内部的控制器。现在的问题是,当尝试进行更新时,会出现以下错误:


MicrosoftAjax.js:5 POST http://localhost:49735/ 500 (Internal Server  Error)
    executeRequest       @ MicrosoftAjax.js:5
    executeRequest       @   MicrosoftAjax.js:5
    invoke               @ MicrosoftAjax.js:5
    _onFormSubmit        @ MicrosoftAjaxWebForms.js:5
    (anonymous function) @ MicrosoftAjax.js:5
    b                    @ MicrosoftAjax.js:5 


我的ascx文件如下所示:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="SearchResults.ascx.cs" Inherits="CarParts24.Controls.Search.Results.SearchResults" %>

<asp:UpdatePanel ID="UpdPnlSearchResults" runat="server">
<ContentTemplate>
    <span id="search-result-json" class="hidden">
        <asp:HiddenField ID="hiddenSearchResults" runat="server" />
    </span>

    <%--<asp:Panel ID="PanelResult" runat="server">--%>

          <%-- Some ordinary HTML code --%>

    <%--</asp:Panel>--%>
</ContentTemplate>
</asp:UpdatePanel>


和代码隐藏:

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CarParts24.Controls.Search.Results
{
public partial class SearchResults : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        PanelResult.Visible = false;
    }

    public void ShowResults(DataTable datatable)
    {
        hiddenSearchResults.Value = JsonConvert.SerializeObject(datatable);
        PanelResult.Visible = true;
    }
}
}
4

1 回答 1

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我发现了问题,这是由于<asp:HiddenField ID="hiddenSearchResults" runat="server" />更新时进行了回发。将其更改为已<asp:Literal ID="hiddenSearchResults" runat="server" />解决的问题

于 2016-06-14T13:04:48.270 回答