MVC返回JSON，IE下無法接收JSON，IE下JSON提示另存為

    public class JsonAttribute : ActionFilterAttribute 
    {
        /// <summary>
        /// 兼容IE下無法接受JSON問題
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            string contentType = filterContext.HttpContext.Response.ContentType;
            if (contentType == "application/json")
                filterContext.HttpContext.Response.ContentType = "text/html";


            base.OnResultExecuted(filterContext);
        }
    }

寫一個過濾器，ContentType修改為"text/html"，類名要以Attribute結尾

在Global.asax文件中注冊過濾器

        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new JsonAttribute());
            filters.Add(new HandleErrorAttribute());
        }