//下载图片
Response.ContentType = "application/x-msdownload";
string filename = "attachment; filename=" + "123.jpg";
Response.AddHeader("Content-Disposition", filename);
string filepath = "/images/123.jpg";
Response.TransmitFile(Server.MapPath(filepath));
Response.ContentType = "application/x-msdownload";
string filename = "attachment; filename=" + "123.jpg";
Response.AddHeader("Content-Disposition", filename);
string filepath = "/images/123.jpg";
Response.TransmitFile(Server.MapPath(filepath));
方法二：转自 http://wenwen.soso.com/z/q283551235.htm 特此感谢
新建一个ashx文件
代码如下：
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/octet-stream";
HttpRequest req = context.Request;
string filename = req.Url.AbsolutePath;
string userid = string.Empty;
if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies["userid"] != null)
{
userid = HttpContext.Current.Request.Cookies["userid"].Value;
}
if (userid == "1")
{
string uuu = context.Server.MapPath(filename);
context.Response.TransmitFile(uuu);
}
else
{
string u2 = context.Server.MapPath("default.rar");
context.Response.WriteFile(u2);
}
}