Get current Url in a Blazor component

Question

I need to know the url of the current page in order to check if I have to apply certain style to a element. The code below is an example.

@using Microsoft.As         


        

Answer 1

You should listen to a LocationChange of the IUriHelper, which triggers the function to do what you want for example:

@using Microsoft.AspNetCore.Blazor.Components
@using Microsoft.Extensions.Logging
@inject Microsoft.AspNetCore.Blazor.Services.IUriHelper UriHelper
@inject ILogger logger


    
        
        
        @Text
    


@functions {
    protected override void OnInit()
    {
        UriHelper.OnLocationChanged += OnLocationChanges;
    }
    [Parameter]
    private string Url { get; set; }
    [Parameter]
    private string Icon { get; set; }
    [Parameter]
    private string Text { get; set; }
    private bool Active = false;
    private void OnLocationChanges(object sender, string newLocation)
    {
        bool active = newLocation.Contains(Url);
        if(active != Active) //Only re-render the components that need it
        {
            Active = active;
            StateHasChanged();
            logger.LogInformation("Location Change To:" + newLocation);
        }
    }
}