asp.net-mvc-3 - 为什么_ViewStart.cshtml不能访问ViewBag对象？

Question

我的/Views 文件夹中有默认的 _ViewStart.cshtml。我希望能够访问我的 ViewBag 对象，以便我可以为所有 View 设置默认标题。

但是，与:

@{
    Layout = "~/Views/Shared/SiteLayout.cshtml";
    ViewBag.Title = "bytecourse - Online Courses in Technology";
}

我收到“当前上下文中不存在名称‘ViewBag’”作为运行时错误。

我需要做什么？

Answer 1

简而言之...使用 Controller 的 View 包。

ViewContext.Controller.ViewBag.MyVar = "myVal";

和

@ViewContext.Controller.ViewBag.MyVar

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这里有很好的资料:http://forums.asp.net/post/4254825.aspx

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Generally, ViewData["StoreName"] is same as ViewBag.StoreName

Also, Controller.ViewData["StoreName"] = Controller.StoreName = ViewContext.Controller.ViewBag.StoreName =ViewContext.Controller.ViewData["StoreName"]

But every view and partial view gets its own instance of viewdata.

http://jeffreypalermo.com/blog/viewdata-mechanics-and-segmentation-excerpt-from-asp.net-mvc-in-action/

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这里有另一个解决方案:https://stackoverflow.com/a/4834382/291753

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