對於下載時新開啟一視窗下載,下載完後需要關閉的一種:對於較小檔案可以有效:
System.IO.FileInfo file = new System.IO.FileInfo("F:\mp3\mp3\別哭我最愛的人.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("別哭我最愛的人.mp3"));
Response.AddHeader("Content-Length", file.Length.ToString());
Response.WriteFile(file.FullName);
Response.Flush();
Response.End();
該程式碼可以實現輸出檔案並將新開啟的窗體關閉。
另一種對於大文件,我們用上述程式碼不是較好,因為上述程式碼是將文件全緩存於伺服器後才輸出的,如果你的伺服器流量大,且文件較大,不建議用以上方法。
以下我測試過,較好能解決:
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;
}
這一種程式碼也是藉款網路上的它也可以實現輸出檔案並關閉新打開幕窗體
另外在測試當中發現,伺服器端與客戶的作業系統不同也會有一些意想不到的事情發生一般來說,用以上程式碼,如不能正常關閉,你可以查閱瀏覽器的設置,在高級中。
再者,你可以修改不同的輸出內容類型Response.ContentType = "application/octet-stream";因為不同的contenttype,在客戶的端的解釋可能是不一樣的。
有想法請回复,歡迎討論
http://www.cnblogs.com/tour-code/archive/2006/10/25/539257.html