public ActionResult Download(string src, string contentType)
{
if (string.IsNullOrEmpty(src))
{
return(new EmptyResult());
}
src = Base64Helper.DecodingString(src);
if (string.IsNullOrEmpty(contentType))
{
string text = FileHelper.GetContentType(Path.GetExtension(src));
if (text.StartsWith("."))
{
text = text.Replace(".", "");
}
contentType = FileHelper.GetContentType(text);
}
return(File(Server.MapPath("~/" + src), contentType));
}