【转】Asp.net下载文件、文件流输出 直接输出文件

一下所写的代码都是在下载页面page_load事件中：

//直接输出文件形式

Response.Clear(); Response.Buffer = true; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath("~/Global.asax"),System.Text.Encoding.UTF8)); Response.WriteFile(Server.MapPath("~/Global.asax")); Response.Flush(); Response.Close();

 

//输出文件流形式

FileStream fileStream = new FileStream(Server.MapPath("~/Global.asax"), FileMode.Open);

long fileSize = fileStream.Length; byte[] fileBuffer = new byte[fileSize]; fileStream.Read(fileBuffer, 0, (int)fileSize);

//如果不写fileStream.Close()语句，用户在下载过程中选择取消，将不能再次下载 fileStream.Close(); Response.ContentType = "application/octet-stream"; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath("~/Global.asax"), System.Text.Encoding.UTF8)); Response.AddHeader("Content-Length", fileSize.ToString()); Response.BinaryWrite(fileBuffer); Response.Flush(); Response.Close();