问题描述
当我在本地运行它时，它工作正常。但是，在测试服务器上运行它时，在index.aspx上出现500错误，提示“在此情况下响应不可用”。
在堆栈跟踪中，我可以看到这与Application_start中的代码某种程度上有关。 Global.asax中的第16行引用了application_start中的Call CheckAppPaths()。尝试注释掉该行，并且在下一行代码中有相同的错误。
堆栈跟踪：
[HttpException (0x80004005): Response is not available in this context.]
System.Web.HttpContext.get_Response() +9931738
KeyAccidentsWeb.Global_asax.Application_Start(Object sender,EventArgs e) in C:\Users\josephd\source\repos\KeyAccidentsWeb\Global.asax.vb:16
[HttpException (0x80004005): Response is not available in this context.]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context,HttpApplication app) +10103063
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext,HttpContext context,MethodInfo[] handlers) +123
System.Web.HttpApplication.InitSpecial(HttpApplicationState state,MethodInfo[] handlers,IntPtr appContext,HttpContext context) +181
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext,HttpContext context) +228
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +314
[HttpException (0x80004005): Response is not available in this context.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +10083304
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +99
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr,HttpContext context) +263
Global.asax中的相关代码：
Sub Application_Start(ByVal sender As Object,ByVal e As EventArgs)
Try
Call CheckAppPaths()
Call GetSettingsDIF()
Call CheckTable()
If Dif Is Nothing Then
Context.Response.Write("DIF not configured")
End If
Catch ex As Exception
Context.Response.Write(ex.Message & "</br>")
End Try
Try
Call ClearUp()
Catch ex As Exception
End Try
End Sub
Private Sub CheckAppPaths()
Dim x As New WebFunctions.WebAppPaths()
If Not IO.Directory.Exists(x.HiddenAppPath) Then
IO.Directory.CreateDirectory(x.HiddenAppPath)
End If
Dim xmlFile As String = IO.Path.Combine(x.HiddenAppPath,"settings.xml")
If Not IO.File.Exists(xmlFile) Then
IO.File.Copy(IO.Path.Combine(x.ActualAppPath,"settings.xml"),IO.Path.Combine(x.HiddenAppPath,"settings.xml"))
End If
End Sub
Private Sub CheckAppPaths()
Dim x As New WebFunctions.WebAppPaths()
If Not IO.Directory.Exists(x.HiddenAppPath) Then
IO.Directory.CreateDirectory(x.HiddenAppPath)
End If
Dim xmlFile As String = IO.Path.Combine(x.HiddenAppPath,"settings.xml"))
End If
End Sub
Index.aspx：
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="index.aspx.vb" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title runat="server" id="pageTitle"></title>
<script type="text/javascript" src="scripts/jquery-1.12.3.min.js"></script>
<script type="text/javascript" src="scripts/Bootstrap/js/bootstrap.js"></script>
<script type="text/javascript" src="scripts/bootstrap-switch-master/dist/js/bootstrap-switch.js"></script>
<script type="text/javascript" src="scripts/jquery-ui-1.10.4.custom.min.js"></script>
<script type="text/javascript" src="scripts/jquery.fileupload.js"></script>
<script type="text/javascript" src="scripts/jquery.iframe-transport.js"></script>
<script type="text/javascript" src="default.js"></script>
<link href="scripts/Bootstrap/css/bootstrap.min.css" rel="stylesheet"/>
<link href="scripts/bootstrap-switch-master/dist/css/bootstrap3/bootstrap-switch.min.css" rel="stylesheet"/>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"/>
<link href="Styles.css" rel="Stylesheet" />
</head>
<body>
<form id="form1" runat="server" onsubmit="return false;">
<div>
<nav id="navbar-example" class="navbar navbar-inverse navbar-static">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" id="title" href="#">Key Accidents Web</a>
</div>
<div id="nbTB" class="collapse navbar-collapse bs-example-js-navbar-collapse">
<button id="btnBack" title="Back" type="button" class="btn btn-primary navbar-btn"><i class="fa fa-arrow-left fa-lg"><span class="glyphicon glyphicon-triangle-left" aria-hidden="true"></span></i></button>
<button id="btnHome" title="home" type="button" class="btn btn-primary navbar-btn navbar-right"><i class="fa fa-home fa-lg"><span class="glyphicon glyphicon-home" aria-hidden="true"></span></i></button>
</div>
</div>
</nav>
<div class="container">
<div class="modal fade" id="myModal" tabindex="-1" role="dialog">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title"></h4>
</div>
<div class="modal-body">
<p id="modal-p"></p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
<div class="col-md-7 page-body">
<div class="col-md-3">
<span class="btn btn-primary fileinput-button" id="fileuploadbutton">
<span>Select File(s)</span>
<input id="fileupload" type="file" multiple="multiple" name="files[]" data-url="fileupload.ashx" style="height:34px;"/>
</span>
<button class="btn btn-primary fileinput-button" id="removebutton">Remove</button>
</div>
<div class="col-md-9">
<div>
<ul id="fileslist" class="list list-unstyled"></ul>
<div class="col-md-9">
<p id="uploadcomplete"></p>
</div>
<div class="col-md-3">
<button class="btn btn-primary fileinput-button" id="sendbutton">Submit</button>
</div>
</div>
</div>
</div>
<div class="col-md-5 page-body">
<div>
<h4>Accident Count: <span id="AccidentCount"></span></h4>
<h4>Casualty Count: <span id="CasualtyCount"></span></h4>
<h4>Vehicle Count: <span id="VehicleCount"></span></h4>
<h4>Start Date: <span id="StartDate"></span></h4>
<h4>End Date: <span id="EndDate"></span></h4>
<br />
<div class="checkbox-box">
<input class="checkbox switch-mini" type="checkbox" id="my-checkbox"/>
<h5 class="checkbox">Overwrite (if file has previously been loaded)</h5>
</div>
</div>
</div>
</div>
</div>
</form>
</body>
</html>
解决方法
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