FIle下载asp.net

这是我用来下载文件的代码,请确保 fuldFilNavn 包含文件的完整路径:

    public static void DownloadFil(string fuldFilNavn)
    {
        HttpContext context = HttpContext.Current;
        context.Response.ClearHeaders();
        context.Response.ClearContent();
        string filNavn = Uri.EscapeDataString(Path.GetFileName(fuldFilNavn)).Replace("+", "%20");
        context.Response.AppendHeader("Content-Disposition", "attachment;filename*=utf-8''" + filNavn);
        context.Response.AppendHeader("Last-Modified", File.GetLastWriteTimeUtc(fuldFilNavn).ToString("R"));
        context.Response.ContentType = "application/octet-stream";
        context.Response.AppendHeader("Content-Length", new FileInfo(fuldFilNavn).Length.ToString());
        context.Response.TransmitFile(fuldFilNavn);
        context.Response.End();
    }

这将下载文件名中包含unicode字符的文件!

您可以尝试以下ASP。NET/C#代码段:

internal static void Download(string FileName)
{
    HttpResponse _response = HttpContext.Current.Response;
    FileStream _fileStream;
    byte[] _arrContentBytes;
    try
    {
        // clear response obj
        _response.Clear();

        // clear content of response obj
        _response.ClearContent();

        // clear response headers
        _response.ClearHeaders();

        // enable response buffer
        _response.Buffer = true;

        // specify response content
        _response.ContentType = ContentType;

        _response.StatusCode = 206;
        _response.StatusDescription = "Partial Content";

        // create FileStream: IMPORTANT - specify FileAccess.Read
        _fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);

        // Bytes array size= (int)_fs.Length;
        _arrContentBytes = new byte[(int)_fileStream.Length];

        // read file into bytes array
        _fileStream.Read(_arrContentBytes, 0, (int)_fileStream.Length);

        // add response header
        _response.AddHeader("content-disposition", "attachment;filename=" + FileName);

        // ACTUAL PROCEDURE: use BinaryWrite to download file
        _response.BinaryWrite(_arrContentBytes);

        // ALTERNATIVE: TransmitFile
        //_response.TransmitFile(filePath);

        // close FileStream
        _fileStream.Flush();
        _fileStream.Close();

        _response.Flush();
        HttpContext.Current.ApplicationInstance.CompleteRequest();
    }
    catch { }
    finally
    {
        _fileStream = null;
        _arrContentBytes = null;
    }
}

为了获得根文件夹和完整路径,您可以使用 Server.MapPath 如您的原始解决方案或以下行中所示,以获得更好的性能:

// get the root dir; fast
string _root = AppDomain.CurrentDomain.BaseDirectory;

此解决方案已在实际web应用程序中测试/实现( http://taxiom.com/Manual_Payday.aspx )-有关演示,请参阅页面右上角的“下载”按钮。希望这能有所帮助。