ASP.NET MVC 不同的 ActionResult 小示例

代码：

        public ActionResult TestNullAction()
        {
            return null;
        }

        /// <summary>
        /// 查看HTML原文件显示：您好！
        /// </summary>
        public void TestVoidAction()
        {
            Response.ContentType = "text/plain";
            Response.Write("您好！"); 
        }

        /// <summary>
        /// 查看HTML原文件显示：测试ContentResult
        /// </summary>
        /// <returns></returns>
        public ContentResult TestContentResult()
        {
            return Content("测试ContentResult");
        }

        /// <summary>
        /// 显示一个图片文件
        /// </summary>
        /// <returns></returns>
        public ActionResult FileContentResultDemo()
        {
            FileStream fs = new FileStream(Server.MapPath(@"/Content/Images/1335230.jpg"), FileMode.Open, FileAccess.Read);
            byte[] buffer = new byte[Convert.ToInt32(fs.Length)];
            fs.Read(buffer, 0, Convert.ToInt32(fs.Length));
            return File(buffer, @"image/gif");
        }

        /// <summary>
        /// 显示一个下载框
        /// </summary>
        /// <param name="fileId"></param>
        /// <returns></returns>
        public ActionResult FilePathResultDemo(int fileId)
        {
            //可以将一个jpg格式的图像输出为gif格式
            string filePath = "/Content/Images/error.png";
            return File(Server.MapPath(filePath), "text/plain", Path.GetFileName(filePath));
        }

        /// <summary>
        /// 抛出一个无权限结果，context.HttpContext.Response.StatusCode = 401;
        /// </summary>
        /// <returns></returns>
        public ActionResult HttpUnauthorizedResultDemo()
        {
            return new HttpUnauthorizedResult();
        }

        /// <summary>
        /// 返回一个名为“JavaScriptResultDemo”的JS文件，文件中的内容为：alert("Hello World!");
        /// </summary>
        /// <returns></returns>
        public ActionResult JavaScriptResultDemo()
        {
            return JavaScript("alert(\"Hello World!\");");
        }

        public ActionResult JsonResultDemo()
        {
            var tempObj = new { Controller = "DemoController", Action = "JsonResultDemo" };
            return Json(tempObj,"text/plain",Encoding.UTF8,JsonRequestBehavior.AllowGet);
        }

        public ActionResult RedirectResultDemo()
        {
            return Redirect("http://www.baidu.com");
        }

        public EmptyResult TestEmptyResult()
        {
            return new EmptyResult();
        }

        public ActionResult TestAjaxHelper()
        {
            return View();
        }

        public HttpUnauthorizedResult TestHttpUnauthorizedResult()
        {
            return null;
        }

JSON:

return Json(result, "text/plain", Encoding.UTF8, JsonRequestBehavior.AllowGet);

谢谢浏览！