如何在ASP.NET Core MVC中指定不同的布局 [英] How do I specify different Layouts in the ASP.NET Core MVC

问题描述

我想在我的应用程序中有2个单独的布局.假设其中一个用于网站的公共"部分，而另一个由于我们的某些原因而为空.

I would like to have 2 separate Layouts in my application. Let say one is for the Public section of the website and the other is empty for some reasons we need.

在Core之前，我可以执行以下操作来定义过滤器:

Before Core I could do this to define a filter:

public class LayoutInjecterAttribute : ActionFilterAttribute
{
    private readonly string _masterName;
    public LayoutInjecterAttribute(string masterName)
    {
        _masterName = masterName;
    }

    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        base.OnActionExecuted(filterContext);
        var result = filterContext.Result as ViewResult;
        if (result != null)
        {
            result.MasterName = _masterName;
        }
    }

}

现在，ViewResult没有MasterName属性.是否可以立即执行此操作，而不在View中使用布局定义.

Now the ViewResult do not have the MasterName property. Is it possible to do now, and not to use in the View the layout definition.

推荐答案

您仍然可以使用ViewData来传递布局名称(尽管我将其创建为结果过滤器):

You can still do something very similar to your original approach, using ViewData to pass around the layout name (Although I would create it as a Result Filter):

public class ViewLayoutAttribute : ResultFilterAttribute
{
    private string layout;
    public ViewLayoutAttribute(string layout)
    {
        this.layout = layout;
    }

    public override void OnResultExecuting(ResultExecutingContext context)
    {
        var viewResult = context.Result as ViewResult;
        if (viewResult != null)
        {
            viewResult.ViewData["Layout"] = this.layout;
        }
    }        
}

然后在_ViewStart.cshtml文件中:

@{
    Layout = (string)ViewData["Layout"] ?? "_Layout";
}

最后，假设您创建了像Views/Shared/_CleanLayout.cshtml这样的新布局，则可以在任何控制器或动作上使用该属性:

Finally, assuming you create a new layout like Views/Shared/_CleanLayout.cshtml, you can use that attribute on any controller or action:

[ViewLayout("_CleanLayout")]
public IActionResult About()
{
    //...
}

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