当用户从我的ASP.NET应用程序下载文件时,会话在下载文件后几秒钟到期。在会话到期之前可以执行任何任务,但大约5-10秒后,会话重新启动并退出。
我已经创建了一个简单的页面来演示这个。要运行这个简单的页面,请创建一个新的asp.net c#项目,然后将代码插入到新页面中。
编辑:这似乎是一个IE7问题。 Firefox和Chrome不受影响。
我认为负责会话重启的代码是:
HttpContext.Current.Response.ContentType = "text/xml";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=test.xml");
HttpContext.Current.Response.Write("<test>this is a test.</test>");
HttpContext.Current.Response.End();
要重新创建此问题:
以下是简单娱乐的代码:
<%@ Page Language="C#" AutoEventWireup="true" %>
<!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 runat="server">
<title>Untitled Page</title>
</head>
<body>
<script runat="server">
private string sessionString {
get {
return HttpContext.Current.Session["sessionString"] == null ? null : HttpContext.Current.Session["sessionString"].ToString();
}
set {
HttpContext.Current.Session["sessionString"] = value;
}
}
protected void Page_Load(object sender, EventArgs e) {
Label1.Text = sessionString ?? "Session is null";
if(sessionString == null) {
Label1.Text = "Session is new";
Label1.BackColor = System.Drawing.Color.Red;
sessionString = "Session is now not null";
}
else {
Label1.Text = sessionString;
Label1.BackColor = System.Drawing.Color.White;
}
}
protected void LinkButton1_Click(object sender, EventArgs e) { }
protected void LinkButton2_Click(object sender, EventArgs e) {
HttpContext.Current.Response.ContentType = "text/xml";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=test.xml");
HttpContext.Current.Response.Write("<test>this is a test.</test>");
HttpContext.Current.Response.End();
}
</script>
<form id="form1" runat="server">
<div>
<asp:Label id="Label1" runat="server" text="Label"></asp:Label> <br />
<asp:LinkButton id="LinkButton1" runat="server" onclick="LinkButton1_Click">Refresh Page</asp:LinkButton> <br />
<asp:LinkButton id="LinkButton2" runat="server" onclick="LinkButton2_Click">Download File</asp:LinkButton> <br /><br />
<b>Steps to recreate:</b>
<ol>
<li>Download the file and save it.</li>
<li>Hit the "Refresh Page" button a couple of times until the "Session is new" text is redisplayed.</li>
<li>Answer my question explaining what the heck is going on!</li>
</ol>
</div>
</form>
</body>
</html>
答案 0 :(得分:2)
Something to do with this(可能是类似的问题)?也许使用Fiddler来更详细地了解cookie的内容。
答案 1 :(得分:1)
确保在删除Response.Clear()调用后开始使用新鲜浏览器。我有同样的问题,阅读这篇文章,并摆脱Response.Clear()工作,但只有在我倾倒了我的桌面上打开的浏览器,并打开了一个新的实例。祝你好运!
答案 2 :(得分:0)
嗯。可能是Response.Clear()
吃会话状态cookie吗?