如何在Htt的presponse发送文件？ [英] How to send file in HttpResponse?

问题描述

在我的应用程序的用户点击一个链接后，可以下载一个文件。文档在code生成的PDF / RTF。我使用的：

In my application user can download a file after clicking a link. Document is PDF/RTF generated in code. I use:

byte[] downloadBytes = some pdf document bytes...
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.Clear();
response.AddHeader("Content-Type", "binary/octet-stream");
response.AddHeader("Content-Disposition",
                "attachment; filename=filename.pdf; size=" + downloadBytes.Length.ToString()); 
response.Flush();
response.BinaryWrite(downloadBytes);
response.Flush();
response.End();

它的工作原理确定，但就是这通常一个好方法吗？为什么冲洗被称为两次？我发现很多不同的例子，这一次工作得很好，但有时我得到了远程主机关闭了连接。错误code是80070057 错误。我找到的解决方案，我应该使用

It works OK but is this generally a good way ? Why flush is called two times? I found many different examples and this one works fine but sometimes I got The remote host closed the connection. The error code is 0x80070057 error. I found solution that I should use

if (Response.IsClientConnected)
{
     Response.Flush();
     Response.End();
}

如何在整个code应该是什么样子？

How the entire code should look like?

推荐答案

下面是我用code。它不叫齐平的。我不知道这是否是正确的做法，但它为我工作。

Here is the code that I use. It does not call flush at all. I am not sure if it is the right way, but it works for me.

public static void ResponseOpenFileBytes(byte[] File, string ContentType, string SaveAsFileName, HttpResponse response)
{
    if (string.IsNullOrEmpty(ContentType))
    {
        ContentType = "application/octet-stream";
    }

    response.Clear();
    response.AddHeader("content-disposition", "attachment;filename=" + SaveAsFileName);
    response.ContentType = ContentType;
    response.BinaryWrite(File);
    response.End();
}

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