note

//目錄下載圖片
string directory = "D:\\test\\";
string fileName = "xxx.jpg";
            
Response.ContentType = "image/jpeg";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);
Response.TransmitFile(directory + fileName);
Response.End();

一般網頁

下載網頁

ContentType

.htm, .html     Response.ContentType = "text/HTML";

.txt    Response.ContentType = "text/plain";

.doc, .rtf, .docx    Response.ContentType = "Application/msword";

.xls, .xlsx    Response.ContentType = "Application/x-msexcel";

.jpg, .jpeg    Response.ContentType = "image/jpeg";

.gif    Response.ContentType =  "image/GIF";

.pdf    Response.ContentType = "application/pdf";

 

資料來源:

http://www.c-sharpcorner.com/uploadfile/afenster/how-to-download-a-file-in-Asp-Net/

https://developer.mozilla.org/zh-TW/docs/Web/HTTP/Headers/Content-Disposition

完整教學

https://weblog.west-wind.com/posts/2007/May/21/Downloading-a-File-with-a-Save-As-Dialog-in-ASPNET

讀URL檔案

http://blog.darkthread.net/post-2008-10-14-download-file-with-c.aspx

Jquery dialog 方式去開啟圖片

http://jsfiddle.net/KyleMit/82QYd/