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asp.net - 选择下拉列表错误 500 时，aspx.vb 页面不起作用

问题描述

几天来，我一直在尝试修复出现在我正在修复的页面上的错误。

aspx.vb 代码

<%@ Page Language="vb"  AutoEventWireup="false" CodeBehind="ModificaLibro.aspx.vb" Inherits="AdministracionLibros.ModificaLib"%>

<%@ Register Assembly="RJS.Web.WebControl.PopCalendar.Net.2008" Namespace="RJS.Web.WebControl"
    TagPrefix="rjs" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
</head>
<body bgcolor="#f1f2d0">
    <form id="form1" runat="server">
    <div >
         <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
    
             
 </asp:ToolkitScriptManager>    
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>                
        <div align="center" >
            <span class="Estilo48">
        <div align="center" >
                        Modificar libro<br />
        
        
        <span class="Estilo48">
                        <br />                        
                        <table align ="center" style="width: 304px; height: 54px;" ><tr>
                                <td align ="right" ><asp:Label runat="server" Text="Editorial:" ID="Label1" 
                                        Font-Names="MS Reference Sans Serif" Font-Size="10pt"></asp:Label>
</td><td align ="left" ><asp:DropDownList runat="server" AutoPostBack="True" Font-Names="MS Reference Sans Serif" Font-Size="9pt" Width="183px" ID="Existe2">
                        </asp:DropDownList>
                            <asp:TextBox runat="server" BackColor="#F1F2D0" BorderColor="#FFFFCC" BorderStyle="Groove" ForeColor="#F1F2D0" Height="16px" Width="16px" ID="IdC" Visible="False"></asp:TextBox>


</td></tr><tr><td align ="right" ><asp:Label runat="server" Text="Genero:" ID="Label19" 
                                    Font-Names="MS Reference Sans Serif" Font-Size="10pt"></asp:Label>


/td><td align ="left" ><asp:DropDownList runat="server" AutoPostBack="True" Font-Names="MS Reference Sans Serif" Font-Size="9pt" Width="183px" ID="EstacionList"></asp:DropDownList>


<asp:TextBox runat="server" Width="25px" ID="IdE" Visible="False"></asp:TextBox>


</td></tr></table></span>
                        <table align ="center" style="width: 309px; height: 33px;" ><tr><td align ="right" >
        <span class="Estilo48">
                            <asp:Label runat="server" Text="Encargado:" Font-Names="MS Reference Sans Serif" Font-Size="9pt" ID="Label20"></asp:Label>
                            </span></td><td align ="left" ><span class="Estilo48">
                                <asp:DropDownList runat="server" AutoPostBack="True" Height="23px" Width="230px" 
                                    ID="empleados">
                            </asp:DropDownList></span></td></tr></table></div></span></div>
                       </ContentTemplate>
        </asp:UpdatePanel>  
<asp:UpdatePanel ID="UpdatePanel2" runat="server"><ContentTemplate><!--code--></ContentTemplate>
                        </asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel3" runat="server"><ContentTemplate><!--code--></ContentTemplate>
                        </asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel4" runat="server"><ContentTemplate><!--code--></ContentTemplate>
                        </asp:UpdatePanel>
</form></body></html>

当我更改下拉列表“Existe2”中的元素时会发生错误，我已经阅读了几页，当可能存在安全问题时可能会发生这种情况。

错误

Uncaught Sys.WebForms.PageRequestManagerServerErrorException: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error ocurred while processing the  request on the server. the status code returned from the server was:500
    at Function.Error$create [as create] (http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:846:15)
    at PageRequestManager$_createPageRequestManagerServerError [as _createPageRequestManagerServerError] (http://localhost:58997/ScriptResource.axd?d=fTrzH_CvX-xCkSycfocz9F4XR69OwmfI_1utNDeAQS1ZuuPHgDpL28cPN2l15Lu3zd2hP_l_opAVxvNuQywowuy0QXQvWYd_gqn-DWUj9PKtl9BVrve-vXVLXfD048NYtAACug2&t=ffffffffec54f2es.js:764:23)
    at PageRequestManager$_parseDelta [as _parseDelta] (http://localhost:58997/ScriptResource.axd?d=fTrzH_CvX-xCkSycfocz9F4XR69OwmfI_1utNDeAQS1ZuuPHgDpL28cPN2l15Lu3zd2hP_l_opAVxvNuQywowuy0QXQvWYd_gqn-DWUj9PKtl9BVrve-vXVLXfD048NYtAACug2&t=ffffffffec54f2es.js:1653:44)
    at PageRequestManager$_onFormSubmitCompleted [as _onFormSubmitCompleted] (http://localhost:58997/ScriptResource.axd?d=fTrzH_CvX-xCkSycfocz9F4XR69OwmfI_1utNDeAQS1ZuuPHgDpL28cPN2l15Lu3zd2hP_l_opAVxvNuQywowuy0QXQvWYd_gqn-DWUj9PKtl9BVrve-vXVLXfD048NYtAACug2&t=ffffffffec54f2es.js:1414:25)
    at Array.<anonymous> (http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:627:23)
    at http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:4337:23
    at raise (http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:7247:17)
    at WebRequest$completed [as completed] (http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:7251:9)
    at XMLHttpRequest.<anonymous> (http://localhost:58997/ScriptResource.axd?d=_o51RmoaFE_rcurlUuuJR7kIk5N35NyYgYliYkiDuuT0q5IhjRIQS6XEEpRgVvtq4rJe1Z1Yh1trL8HXNmAbdW4deIjtWUiHhxs2WMwxMCl4u8-3-8D-pXTLHycJezeUzbjyKQ2&t=ffffffffec54f2es.js:6856:35)

我一直在几页中寻找错误，但没有太多关于它的信息。我已经做了我发现的一切，但没有任何效果。

标签： asp.netvb.net

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