如何检查ASP.NET Core MVC的共享文件夹中是否存在视图? [英] How to check if a view exist in shared folder in ASP.NET Core MVC?

问题描述

如何知道ASP.NET Core中是否存在视图?

How to know view exists in ASP.NET Core?

我正在搜索这样的伪代码:

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

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

推荐答案

您可以使用

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");
}

如果您特别想检查视图是否在特定的文件夹中(例如，在您的示例中为共享")，则可以使用GetView:

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

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

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