C# 下载文件 - BADRESPONSE : Invalid or unexpected token

Question

我正在调用这个直接方法，但是当我尝试下载文件时收到这个错误(路径是正确的并且经过测试):

[DirectMethod]
    public void downloadFile(string fname, string ftype)
    {
        HttpContext.Current.Response.ContentType = "APPLICATION/OCTET-STREAM";
        String Header = "Attachment; Filename=" + fname;
        HttpContext.Current.Response.AppendHeader("Content-Disposition", Header);
        System.IO.FileInfo Dfile = new System.IO.FileInfo(HttpContext.Current.Server.MapPath("CopyFiles\\" + ftype + "\\"+ fname));
        HttpContext.Current.Response.WriteFile(Dfile.FullName);
        HttpContext.Current.Response.End();
    }

BADRESPONSE: Invalid or unexpected token

Answer 1

它只需要在 WriteFile() 之前 flush() :

[DirectMethod]
public void downloadFile(string fname, string ftype)
{
    HttpContext.Current.Response.ContentType = "APPLICATION/OCTET-STREAM";
    String Header = "Attachment; Filename=" + fname;
    HttpContext.Current.Response.AppendHeader("Content-Disposition", Header);
    System.IO.FileInfo Dfile = new System.IO.FileInfo(HttpContext.Current.Server.MapPath("CopyFiles\\" + ftype + "\\"+ fname));
    HttpContext.Current.Response.Flush();
    HttpContext.Current.Response.WriteFile(Dfile.FullName);
    HttpContext.Current.Response.End();
}