1,推荐指数*****,大文件也可以
string fileName = "test.pdf"; string filePath = Server.MapPath("/" + fileName); Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName); Response.TransmitFile(filePath);
2,推荐指数****
string fileName = "test.pdf"; string filePath = Server.MapPath("/" + fileName);
FileInfo fileInfo = new FileInfo(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";//application//pdf Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8"); Response.WriteFile(fileInfo.FullName); Response.Flush(); Response.End();
3、推荐指数***,大于400m的文件会卡死
string fileName = "test.pdf"; string filePath = Server.MapPath("/" + fileName); FileStream fs = new FileStream(filePath, FileMode.Open); byte[] bytes = new byte[(int)fs.Length]; fs.Read(bytes, 0, bytes.Length); fs.Close(); Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8)); Response.BinaryWrite(bytes); Response.Flush(); Response.End();