关于网页下载文件,使用数据流方式下载
关于文件下载,很多都是用href=‘文件地址‘,这样做是很不安全的,所以需要使用到文件流,以下代码用于下载一张图片。
Response.BufferOutput = false; Response.Clear(); Response.ContentType = "application/x-msdownload"; Response.AppendHeader("Content-Disposition", "attachment; filename=" + "优惠券.jpg"); Response.ContentType = "application/octstream"; Response.CacheControl = "Private"; System.IO.Stream stm = new System.IO.FileStream(Server.MapPath("~/uploadfiles/youhui/"+path), System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); Response.AppendHeader("Content-length", stm.Length.ToString()); System.IO.BinaryReader br = new System.IO.BinaryReader(stm); byte[] bytes; for (Int64 x = 0; x < (br.BaseStream.Length / 4096 + 1); x++) { bytes = br.ReadBytes(4096); Response.BinaryWrite(bytes); System.Threading.Thread.Sleep(5); }
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