▲对于下载时新打开一窗口下载,下载完后需要...... 对于下载时新打开一窗口下载,下载完后需要关闭的 一种:对于较小文件可以有效: System.IO.FileInfo file = new System.IO.FileInfo("F:\\mp3\\mp3\\别哭我最爱的人.mp3"); Response.Clear(); Response.ClearHeaders(); Response.Buffer = false; Response.Charset="GB2312"; Response.ContentEncoding=System.Text.Encoding.UTF8; Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename="+Server.UrlEncode("别哭我最爱的人.mp3")); Response.AddHeader("Content-Length", file.Length.ToString()); Response.WriteFile(file.FullName); Response.Flush(); Response.End(); 该代码可以实现输出文件并将新打开的窗体关闭。 另一种对于大文件,我们用上述代码不是较好,因为上述代码是将文件全缓存于服务器后才输出的,如果你的服务器流量大,且文件较大,不建议用以上方法。 以下我测试过,较好能解决: public static bool ResponseFile(HttpRequest _Request,HttpResponse _Response,string _fileName,string _fullPath, long _speed) { try { FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); BinaryReader br = new BinaryReader(myFile); try { _Response.AddHeader("Accept-Ranges", "bytes"); _Response.Buffer = false; long fileLength = myFile.Length; long startBytes = 0; int pack = 10240; //10K bytes int sleep = (int)Math.Floor(1000 * pack / _speed) + 1; if (_Request.Headers["Range"] != null) { _Response.StatusCode = 206; string[] range = _Request.Headers["Range"].Split(new char[] {'=', '-'}); startBytes = Convert.ToInt64(range[1]); } _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString()); if (startBytes != 0) { _Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength-1, fileLength)); } _Response.AddHeader("Connection", "Keep-Alive"); _Response.ContentType = "application/octet-stream"; _Response.AddHeader("Content-Disposition","attachment;filename=" + HttpUtility.UrlEncode(_fileName,System.Text.Encoding.UTF8) ); br.BaseStream.Seek(startBytes, SeekOrigin.Begin); int maxCount = (int) Math.Floor((fileLength - startBytes) / pack) + 1; for (int i = 0; i < maxCount; i++) { if (_Response.IsClientConnected) { _Response.BinaryWrite(br.ReadBytes(pack)); Thread.Sleep(sleep); } else { i=maxCount; } } _Response.Flush(); } catch { return false; } finally { br.Close(); myFile.Close(); } } catch { return false; } return true; } 这一种代码也是借签网上的 它也可以实现输出文件并关闭新打开幕窗体 另外在测试当中发现,服务器端与客户的操作系统不同 也会有一些意想不到的事情发生 一般来说,用以上代码,如不能正常关闭,你可以查阅浏览器的设置,在高级中。 再者,你可以修改不同的输出内容类型Response.ContentType = "application/octet-stream";因为不同的contenttype,在客户的端的解释可能是不一样的。 有想法请回复,欢迎讨论 |
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