ASP.net 下载文件 在 ASP.NET 中使用 HttpContext.Current.Response.TransmitFile

Question

public void Downloadfile(string sFileName, string sFilePath)
{
    HttpContext.Current.Response.Clear();
    HttpContext.Current.Response.ClearContent();
    HttpContext.Current.Response.ClearHeaders();
    HttpContext.Current.Response.ContentType = "APPLICATION/OCTET-STREAM";
    String Header = "Attachment; Filename=" + sFileName;
    HttpContext.Current.Response.AppendHeader("Content-Disposition", Header);
    HttpContext.Current.Response.AppendHeader("Cache-Control", "no-cache");
    System.IO.FileInfo Dfile = new System.IO.FileInfo(HttpContext.Current.Server.MapPath(sFilePath));
    HttpContext.Current.Response.TransmitFile(Dfile.FullName);
    HttpContext.Current.ApplicationInstance.CompleteRequest();
}

我有一个下载按钮，点击后会返回调用并下载相应的文件下载，但有时返回的文件是detailt.aspx文件。我不明白发生了什么事。我需要帮助。非常感谢

Answer 1

这对我来说已经工作了一段时间了，没有任何问题。

public void Downloadfile(string sFileName, string sFilePath)
{
    var file = new System.IO.FileInfo(sFilePath);

    Response.Clear();
    Response.AddHeader("Content-Disposition", "attachment; filename=" + sFileName);
    Response.AddHeader("Content-Length", file.Length.ToString(CultureInfo.InvariantCulture));
    Response.ContentType = "application/octet-stream";
    Response.WriteFile(file.FullName);
    Response.End();
}