后台获取视图对应的字符串

1.帮助类

    /// <summary>
    /// 后台获取视图对应的字符串
    /// </summary>
    public class ViewHelper
    {

        /// <summary>
        /// 将View输出为字符串
        /// (注：不会执行对应的action方法)
        /// </summary>
        /// <param name="controller">Controller实例</param>
        /// <param name="viewName">如果view文件在当前Controller目录下，则直接输入文件名(例如：Toolbar)
        /// 否则，从根路径开始指定（例如：~/Views/User/Toolbar.cshtml）
        /// </param>
        /// <param name="masterName">模板页文件名（注：显示指定可修改Layout）</param>
        /// <returns></returns>
        public static string RenderViewToString(Controller controller, string viewName, string masterName)
        {
            IView view = ViewEngines.Engines.FindView(controller.ControllerContext, viewName, masterName).View;

            using (StringWriter sw = new StringWriter())
            {
                ViewContext viewContext = new ViewContext(controller.ControllerContext, view, controller.ViewData, controller.TempData, sw);
                viewContext.View.Render(viewContext, sw);
                return sw.ToString();
            }
        }
        /// <summary>
        /// 将PartialView输出字符串
        /// </summary>
        /// <param name="controller">controller实例</param>
        /// <param name="viewName">如果PartialView文件在当前Controller目录下，则直接输入文件名（例如：Toolbar）；
        /// 否则，从根路径开始指定（例如：~/View/User/Toolbar.cshtml）
        /// </param>
        /// <param name="model">构造页面所需要的实体参数</param>
        /// <returns>字符串</returns>
        public static string ReaderPartialViewToString(Controller controller, string viewName, object model)
        {
            IView view = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName).View;
            controller.ViewData.Model = model;
            using (StringWriter sw = new StringWriter())
            {
                ViewContext viewContext = new ViewContext(controller.ControllerContext, view, controller.ViewData, controller.TempData, sw);

                viewContext.View.Render(viewContext, sw);

                return sw.ToString();
            }
        }
    }

2.使用验证

1.

        public ActionResult Index()
        {
            //后台加载其他视图为字符串没有母版页
            ViewBag.tempOne = ViewHelper.RenderViewToString(this, "TempOne", null);
            return View();
        }
        public ActionResult IndexTwo()
        {
            //后台加载其他视图的字符串，带有母版页
            //ViewBag.tempTwo = ViewHelper.RenderViewToString(this, "TempTwo", null);

            //后台指定修改母版页 ，并生成字符串
            ViewBag.tempTwo = ViewHelper.RenderViewToString(this, "TempTwo", "_Layout");
            return View();
        }
        //不使用母版页
        public ActionResult TempOne()
        {
            return View();
        }
        //使用母版页
        public ActionResult TempTwo()
        {
            ////获取 可用字体字符数组
            //string[] nameList = FontFamily.Families.Select(q => q.Name).ToArray();
            //ViewBag.nameList = nameList;
            return View();
        }

2.

        public ActionResult Index()
        {
            //后台加载其他controller 的 视图，并生成字符串
            ViewBag.tempTwo = ViewHelper.RenderViewToString(this, "~/Views/ViewOne/TempTwo.cshtml", null);

            return View();
        }

3.

        public ActionResult Index()
        {
            //显示主视图
            //ViewBag.tempOne = ViewHelper.RenderViewToString(this, "~/views/viewone/TempOne.cshtml", null);
            //作为主视图显示，会加载母版页
            //ViewBag.tempTwo = ViewHelper.RenderViewToString(this, "PartialTwo",null);


            //作为部分视图显示，不会加载母版页,会过滤到部分标签(head,body)
            //ViewBag.tempTwo = ViewHelper.ReaderPartialViewToString(this, "PartialTwo", null);
            //ViewBag.tempTwo = ViewHelper.ReaderPartialViewToString(this, "~/views/viewone/TempOne.cshtml", null);

            //作为部分视图显示，传递参数
            ViewBag.tempTwo = ViewHelper.ReaderPartialViewToString(this, "PartialTwo", new int[] { 1, 2, 3 });

            return View();
        }
        //部分视图
        public PartialViewResult PartialTwo()
        {
            return PartialView();
        }