Viewbag不存在

Question

我试着这样做：

var NewViewResult = new ViewResult { ViewName = "Error", ViewBag.error = "Error Here" };

我收到了这两个错误

• 无效的初始化成员声明符
• 名称＆＃39; ViewBag＆＃39;在当前上下文中不存在

那是我的代码：

public override void OnException(System.Web.Mvc.ExceptionContext filterContext)
{
    if (filterContext.ExceptionHandled) return;

    string actionName = filterContext.RouteData.Values["action"].ToString();
    Type controllerType = filterContext.Controller.GetType();
    var method = controllerType.GetMethod(actionName);
    var returnType = method.ReturnType;

    if (returnType.Equals(typeof(JsonResult))) if (filterContext.Exception is CustomException) filterContext.Result = new JsonResult() { Data = ((CustomException)filterContext.Exception).Type }; else filterContext.Result = new JsonResult() { Data = OurExceptionType.GeneralException };

    else if (returnType.Equals(typeof(ActionResult)) || (returnType).IsSubclassOf(typeof(ActionResult)))  filterContext.Result = new ViewResult { ViewName = "Error" ViewBag.error="SomeError" }; 


    filterContext.ExceptionHandled = true;
}

Answer 1

ViewBag是一个动态属性，你不能在ViewResult中传递它。

在ViewBag中设置值，如下所示：

var NewViewResult = new ViewResult { ViewName = "Error" }; 

ViewBag.error = "Error Message";

和在视图中，您只需访问它而无需传递ViewResult：

<span>@ViewBag.error</span>

如果你真的想在ViewResult中传递它，那么不要使用ViewBag，这样做：

var NewViewResult = new ViewResult { ViewName = "Error" };