下载大文件时摆脱记忆例外

发布于 2025-02-08 17:52:42 字数 505 浏览 0 评论 0原文

我开发了ASP.NET Web应用程序。我正在尝试从文件服务器下载文档。文件大小可能超过1GB。

这里是，第一次下载文件。当我单击相同的链接时，我会得到“不记忆异常”会引发错误。

如果是小型文件，我没有任何问题可以下载填充物...

如果我下载文档超过1GB，我们该如何处理此错误...？

以下是在ASP.NET中下载文件的代码（文件背后的代码）

         Dim binFile As Byte() = File.ReadAllBytes(filename)
         Response.ContentType = "application/octet-stream"
         Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename)
         Response.BinaryWrite(binFile)
         Response.End()

原文

I developed ASP.NET web application. I am trying to download the document from file server. FileSize maybe more than 1GB.

Here the thing is, very first time file got downloaded. when i click the same link, i am getting "Out of memory Exception" throws error.

If it is small size file, i don't get any issues to download the filles...

How do we handle this error if i download the document more than 1GB...?

below is the code to download the file in ASP.NET (Code behind file)

         Dim binFile As Byte() = File.ReadAllBytes(filename)
         Response.ContentType = "application/octet-stream"
         Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename)
         Response.BinaryWrite(binFile)
         Response.End()

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

南烟 2025-02-15 17:52:42

response.binarywrite（）将整个文件缓冲到内存，您可以使用httpresponse.transmitfile（），该文件不会在内存中缓冲文件。

更好的解决方案是将文件发送为块，流和...

这是一个无需缓冲>的下载文件的示例

using (FileStream fileStream = File.OpenRead("full path to file"))
{
    int bufferSize = 10 * 1024;
    byte[] buffer = new byte[bufferSize];

    long dataToRead = fileStream.Length;
    Response.Clear();
    Response.ContentType = "application/octet-stream";
    Response.AddHeader("Content-Disposition", "attachment; filename=FILE_NAME_THAT_USER_MUST_SEE");
    Response.AddHeader("Content-Length", fileStream.Length.ToString());

    while (dataToRead > 0)
        if (Response.IsClientConnected)
        {
            int readLength = fileStream.Read(buffer, 0, bufferSize);
            Response.OutputStream.Write(buffer, 0, readLength);
            Response.Flush();
            buffer = new byte[bufferSize - 1 + 1];
            dataToRead -= readLength;
        }
        else
            break;
}

Response.Close();

Response.BinaryWrite() buffers whole file into memory, you can Use HttpResponse.TransmitFile() which don't buffer the file in memory.

Better solution is to send file as chunks, stream and ...

Here is a sample for download file without buffer

using (FileStream fileStream = File.OpenRead("full path to file"))
{
    int bufferSize = 10 * 1024;
    byte[] buffer = new byte[bufferSize];

    long dataToRead = fileStream.Length;
    Response.Clear();
    Response.ContentType = "application/octet-stream";
    Response.AddHeader("Content-Disposition", "attachment; filename=FILE_NAME_THAT_USER_MUST_SEE");
    Response.AddHeader("Content-Length", fileStream.Length.ToString());

    while (dataToRead > 0)
        if (Response.IsClientConnected)
        {
            int readLength = fileStream.Read(buffer, 0, bufferSize);
            Response.OutputStream.Write(buffer, 0, readLength);
            Response.Flush();
            buffer = new byte[bufferSize - 1 + 1];
            dataToRead -= readLength;
        }
        else
            break;
}

Response.Close();

回复收藏 0 原文

~没有更多了~