How do you call a methode/function from razorcomponent-part (Maui / Blazor)?

Question

I have a MauiBlazor app and want to navigate back to the indexpage if true:

    @page "/start"
    @inject NavigationManager NavMan

    @if (true)
    {
        @(() => NavMan.NavigateTo("/"))
    }

Output on screen is a text:"System.Action" I did expect it to navigate back to index-page!

Why and how do I do this right?

Answer 1

Your writing Razor markup not C# code.

The Razor compiler evaluates:

() => NavMan.NavigateTo("/")

literally as a System.Action.

To execute code you can define a RenderFragment. At which point you can roll in your conditional code as well.

@inject NavigationManager NavMan

@(this.CheckIfWeNeedToGoToHome)

@code {
    private RenderFragment CheckIfWeNeedToGoToHome => (builder) =>
    {
        if (true)
            NavMan.NavigateTo("/");
    };
}