<a href="download.ashx?url=<%=Server.UrlEncode("111.txt")%>">下載</a>

download.ashx

public void ProcessRequest(HttpContext context)
??????? {
??????????? string url = HttpContext.Current.Server.UrlDecode(context.Request.QueryString["url"]);
??????????? downloadfile(url);
??????? }

??????? public bool IsReusable
??????? {
??????????? get
??????????? {
??????????????? return false;
??????????? }
??????? }
??????? public void downloadfile(string s_fileName)
??????? {
??????????? HttpContext.Current.Response.ContentType = "application/ms-download";
??????????? string s_path = HttpContext.Current.Server.MapPath(".") + s_fileName;
??????????? System.IO.FileInfo file = new System.IO.FileInfo(s_path);
??????????? HttpContext.Current.Response.Clear();
??????????? HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
??????????? HttpContext.Current.Response.Charset = "utf-8";
??????????? HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
??????????? HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
??????????? HttpContext.Current.Response.WriteFile(file.FullName);
??????????? HttpContext.Current.Response.Flush();
??????????? HttpContext.Current.Response.Clear();
??????????? HttpContext.Current.Response.End();

??????? }

轉載于:https://www.cnblogs.com/zhengguangITelite/archive/2012/05/17/2506655.html

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