如何检查ASP.NET Core MVC的共享文件夹中是否存在视图？

Question

How to know view exists in ASP.NET Core?

I'm searching for a pseudo-code like this:

@if (Exists("/Views/Shared/SomeView.cshtml"))
{
    Html.Partial("/Views/Shared/SomeView.cshtml"))
}

Answer 1

You can use FindView for this. Inside of a view, you can use dependency injection to get an instance of ICompositeViewEngine , which is registered for you when adding the MVC services. Using this instance, it's possible to determine whether or not the view exists using something like the following:

@inject ICompositeViewEngine Engine

@if (Engine.FindView(ViewContext, "SomeView", isMainPage: false).Success)
{
    @Html.Partial("SomeView");
}

If you specifically want to check whether or not the View exists in a specific folder (eg Shared in your example), you can use GetView :

@if (Engine.GetView(null, "Views/Shared/SomeView.cshtml", isMainPage: false).Success)