Several ways to implement the download function in ASP

TransmitFile implementation Download

 protected voidButton1_Click (Objectsender, EventArgs e) {Response.ContentType="application/x-zip-compressed"; Response.AddHeader ("content-disposition","Attachment;filename=z.zip"); stringfilename = Server.MapPath ("Download/aaa.zip");     Response.TransmitFile (filename); }

WriteFile Implementation Download

 protected voidButton2_Click (Objectsender, EventArgs e) {               stringFileName ="Aaa.zip";//file name saved by the client        stringFilepath=server.mappath ("Download/aaa.zip");//PathFileInfo FileInfo=NewFileInfo (FilePath);         Response.Clear ();         Response.clearcontent ();         Response.ClearHeaders (); Response.AddHeader ("content-disposition","attachment;filename="+fileName); Response.AddHeader ("Content-length", fileInfo.Length.ToString ()); Response.AddHeader ("content-transfer-encoding","binary"); Response.ContentType="Application/octet-stream"; Response.ContentEncoding= System.Text.Encoding.GetEncoding ("gb2312");         Response.WriteFile (Fileinfo.fullname);         Response.Flush ();     Response.End (); }

WriteFile Sub-block download

  protected voidButton3_Click (Objectsender, EventArgs e) {        stringFileName ="Aaa.zip";//file name saved by the client        stringFilePath = Server.MapPath ("Download/aaa.zip");//PathSystem.IO.FileInfo FileInfo=NewSystem.IO.FileInfo (FilePath); if(Fileinfo.exists = =true)         {            Const LongChunkSize =102400;//100K Read the file every time, only read 100K, this can alleviate the pressure of the server            byte[] buffer =New byte[ChunkSize];             Response.Clear (); System.IO.FileStream IStream=System.IO.File.OpenRead (FilePath); LongDatalengthtoread = Istream.length;//get the total size of the downloaded fileResponse.ContentType ="Application/octet-stream"; Response.AddHeader ("content-disposition","attachment; Filename="+Httputility.urlencode (fileName));  while(Datalengthtoread >0&&response.isclientconnected) {intLengthread = istream.read (buffer,0, Convert.ToInt32 (ChunkSize));//the size of the readResponse.OutputStream.Write (Buffer,0, Lengthread);                 Response.Flush (); Datalengthtoread= Datalengthtoread-Lengthread;         } response.close (); }     }

Stream mode Download

 protected voidButton4_Click (Objectsender, EventArgs e) {        stringFileName ="Aaa.zip";//file name saved by the client        stringFilePath = Server.MapPath ("Download/aaa.zip");//Path//download a file as a stream of charactersFileStream fs =NewFileStream (FilePath, FileMode.Open); byte[] bytes =New byte[(int) fs.         Length]; Fs. Read (Bytes,0, Bytes.         Length); Fs.         Close (); Response.ContentType="Application/octet-stream"; //notifies the browser to download a file instead of opening itResponse.AddHeader ("content-disposition","attachment; Filename="+Httputility.urlencode (FileName, System.Text.Encoding.UTF8));         Response.BinaryWrite (bytes);         Response.Flush ();     Response.End (); }

Several ways to implement the download function in ASP