1.普通下载:
//下载文件的路径 string path=Server.MapPath("广告.jpg"); //下载文件的名称 string filename = "广告.jpg"; System.IO.FileInfo toDownload = new System.IO.FileInfo(path); Response.Clear(); if (System.IO.Path.GetExtension(filename) == ".jpg") ...{ Response.AddHeader("Content-Disposition", "attachment;filename=NEW_" + HttpUtility.UrlEncode(toDownload.Name)); Response.ContentType = "application/x-zip-compressed"; Response.TransmitFile(path); Response.End(); }
2.大文件分成小块下载:
//下载文件的路径 string path = Server.MapPath("广告.jpg"); //下载文件的名称 string filename = "广告.jpg"; System.IO.FileInfo toDownload = new System.IO.FileInfo(path); if (toDownload.Exists == true) { const long ChunkSize = 10000; byte[] buffer = new byte[ChunkSize]; Response.Clear(); System.IO.FileStream iStream = System.IO.File.OpenRead(path); long dataLengthToRead = iStream.Length; Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=new_" + HttpUtility.UrlEncode(toDownload.Name)); while (dataLengthToRead > 0 && Response.IsClientConnected) { int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize)); Response.OutputStream.Write(buffer, 0, lengthRead); Response.Flush(); dataLengthToRead = dataLengthToRead - lengthRead; } Response.Close(); }