我继承了一个旧网站,该网站具有下载用户记录的Excel文档的功能。以下代码导致"远程主机关闭连接。错误代码是0x800704CD。 "错误:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
namespace MySite.ApplicationServices
{
public class OutputFileWriter : IDisposable
{
private HttpResponse _response;
private bool _isResponsePrepared;
public OutputFileWriter(HttpResponse response)
{
this._response = response;
}
public OutputFileWriter(HttpResponse response, string outputFileName)
: this(response)
{
this.OutputFileName = outputFileName;
}
public string OutputFileName { get; set; }
public virtual void WriteLine(string line)
{
if (this._response == null)
throw new ObjectDisposedException("OutputFileWriter");
if (!this._isResponsePrepared)
{
this.PrepareResponse();
this._isResponsePrepared = true;
}
this._response.Write(line);
}
public virtual void Dispose()
{
if (this._response != null)
{
this._response.Flush();
this._response.Close();
this._response = null;
}
}
protected virtual void PrepareResponse()
{
if (string.IsNullOrEmpty(this.OutputFileName))
throw new InvalidOperationException("An output file name is required.");
this._response.Clear();
this._response.ContentType = "application/octet-stream";
this._response.Buffer = this._response.BufferOutput = false;
this._response.AppendHeader("Cache-Control", "no-store, no-cache");
this._response.AppendHeader("Expires", "-1");
this._response.AppendHeader("Content-disposition", "attachment; filename=" + this.OutputFileName);
}
}
}
以下是调用它的代码示例(点击'下载'按钮):
using (OutputFileWriter writer = new OutputFileWriter(this.Response, "users.xls"))
{
foreach (string result in searchResults)
{
writer.WriteLine(result);
}
}
即使只下载了几个字节,也会发生错误。我知道如果客户取消下载,在正常情况下会发生错误,但是当人们也没有取消时,就会发生错误。我认为这种联系正在消失,但我不确定为什么。
如果它是相关的,则在IIS 7中使用.NET 2.0下的集成应用程序池配置该站点。它也是负载平衡的。
有什么想法吗?
答案 0 :(得分:0)
经过进一步调查后,该文件似乎实际上只能在Firefox中下载。
以下帖子建议从_response.Close()更改为_response.End()可能会有效https://productforums.google.com/forum/#!topic/chrome/8Aykgxa8kWU。
然而,我看到了这个HttpResponse.End vs HttpResponse.Close vs HttpResponse.SuppressContent
所以我现在在HttpApplication实例上调用CompleteRequest()。像这样:
旧方法
public virtual void Dispose()
{
if (this._response != null)
{
this._response.Flush();
this._response.Close();
this._response = null;
}
}
新方法:
public virtual void Dispose()
{
if (this._response != null)
{
this._response.Flush();
this._application.CompleteRequest();
this._response = null;
}
}
现在工作正常。