對於下載時新打開一窗口下載,下載完後需要關閉的
一種:對於較小文件可以有效:
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();
該代碼可以實現輸出文件並將新打開的窗體關閉。
另一種對於大文件,我們用上述代碼不是較好,因為上述代碼是將文件全緩存於服務器後才輸出的,如果你的服務器流量大,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;
}
這一種代碼也是借簽網上的
它也可以實現輸出文件並關閉新打開幕窗體
另外在測試當中發現,服務器端與客戶的操作系統不同
也會有一些意想不到的事情發生
一般來說,用以上代碼,如不能正常關閉,你可以查閱浏覽器的設置,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。
有想法請回復,歡迎討論