How do I specify different Layouts in the ASP.NET Core MVC

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; } } } 

Then in the _ViewStart.cshtml file:

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

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() { //... } 

This is how I am using multiple layouts in my ASP.NET core MVC application.

You can try like this-

In _ViewStart.cshtml specify default _Layout like this-

@{ Layout = "_Layout"; } 

If you want to set page specific layout then in that page.cshtml, you can assign other view like this-

@{ Layout = "~/Views/Shared/_Layout_2.cshtml"; ViewData["Title"] = "Page Title"; } 

See if this helps.

If you want to have a different layout based on some condition, you could use this code in the _ViewStart.cshtml file:

@{ if (some condition) { Layout = "_Layout1"; } else if (some other condition) { Layout = "_Layout2"; } etc. } 

I use this in one of my projects. In my case the condition is User.IsInRole("admin") and my _ViewStart.cshtml file is as follows:

@{ if (User.IsInRole("admin")) { Layout = "_AdminLayout"; } else { Layout = "_Layout"; } } 

Since there are only two roles in my project, which result in only one condition, this workaround is not too bad in my case. I hope someone with in a similar situation will find this useful :)

In ASP.NET Core 2.0, I was inspired by the answer of @Daniel J.G.

I made a ViewLayoutAttribute:

[AttributeUsage(AttributeTargets.Class)] public class ViewLayoutAttribute : Attribute { public ViewLayoutAttribute(string layoutName) { this.LayoutName = layoutName; } public string LayoutName { get; } } 

Exemple of a controller class:

[ViewLayout("_Layout2")] public class MyController : Controller { // Code } 

And I created an extension to get this very attribute from the ViewContext:

 public static class RazorExtensions { /// <summary> /// Gets the <see cref="ViewLayoutAttribute"/> from the current calling controller of the /// <see cref="ViewContext"/>. /// </summary> public static ViewLayoutAttribute GetLayoutAttribute(this ViewContext viewContext) { // See if Razor Page... if (viewContext.ActionDescriptor is CompiledPageActionDescriptor actionDescriptor) { // We want the attribute no matter what. return Attribute.GetCustomAttribute(actionDescriptor.ModelTypeInfo, typeof(ViewLayoutAttribute)) as ViewLayoutAttribute; } // See if MVC Controller... // Property ControllerTypeInfo can be seen on runtime. var controllerType = (Type)viewContext.ActionDescriptor .GetType() .GetProperty("ControllerTypeInfo")? .GetValue(viewContext.ActionDescriptor); if (controllerType != null && controllerType.IsSubclassOf(typeof(Microsoft.AspNetCore.Mvc.Controller))) { return Attribute.GetCustomAttribute(controllerType, typeof(ViewLayoutAttribute)) as ViewLayoutAttribute; } // Nothing found. return null; } } 

And in _ViewStart.cshtml:

@using MyApp.Extensions @{ Layout = ViewContext.GetLayoutAttribute()?.LayoutName ?? "_Layout"; } 

You can use IViewLocationExpander interface to render view as you want. Please refer this link Working with IViewLocationExpander in mvc for more details

Regards,

Rohit

To have a Multiple Layout in asp.net core is quite easy, follow the steps below:

Step 1: Create the layout inside the "Shared Folder located Under Views" and give it a name with prefix "_" i.e _myLoginLayout.cshtml

Step 2: Specify your layout at the beginning of the page you want to apply it e.g @{ Layout = "~/Views/Shared/_myLoginLayout.cshtml"; ViewData["Title"] = "TestMe";//you can add the title as well... } So when _ViewStart.cshtml is loading Layout for your page..it will read the Layout you specify.