ASP.NET(C#)下載圖片代碼

在做下載的功能時，如果下載的檔案是一個Rar的壓縮包，通常我們只做一個連結，連結地址指向這個壓縮包即可，但如果下載的是一個圖片檔案，這個辦法就行不通了，用下面這段代碼就可以實現下載圖片，WORD文檔等檔案。

 

try
            {
                string FullFileName = Server.MapPath(@"/images/imgname.jpg"); //FileName--要下載的檔案名稱 
                System.IO.FileInfo DownloadFile = new System.IO.FileInfo(FullFileName);
                if (DownloadFile.Exists)
                {
                    Response.Clear();
                    Response.ClearHeaders();
                    Response.Buffer = false;
                    Response.ContentType = "application/octet-stream";
                    Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.Name, System.Text.Encoding.ASCII));
                    Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
                    Response.WriteFile(DownloadFile.FullName);
                    Response.Flush();
                    Response.End();
                }
                else
                {
                    //檔案不存在 
                }
            }
            catch
            {
                //檔案不存在
            }