ASP.NET MVC 2 如何在执行操作之前检查用户的权限？

ASP.NET MVC 2 How to check the user's permissions before action is executed?

我有一个控制器，并且要调用它的所有操作，用户必须拥有这样做的特权。问题是如何在执行动作之前检查？如果用户没有权限，我想呈现带有错误消息的视图。我尝试使用覆盖的 OnActionExecuting 方法，但我无法从该方法返回视图

I tried to use overriden OnActionExecuting method, but I can't return a View from that method

事实上你可以：

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public override void OnActionExecuting(ActionExecutingContext filterContext)
{
bool userHasPermissions = CheckUserPermissionsFromSomewhere(filterContext);
if (!userHasPermissions)
{
filterContext.Result = new ViewResult
{
// you can also specify master page and view model
ViewName ="Forbidden"
};
}
else
{
base.OnActionExecuting(filterContext);
}
}