Get Device Properties using Xamarin Forms?

Question

i\'m designing a cross platform app using xamarin forms. every page/view/Form designed from code behind. now i want to read Height and Width of the device used by user. base

Answer 1

I do this in my viewmodel and it works great. You could do the same in your code-behind.

public SomeViewModel
{
    private double width;
    private double Width
    {
        get { return width; }
        set
        {
            width = value;
            if (value != 0 && value != -1)
            {
                // device width found, set other properties
                SetProperties();
            }
        }
    }

    void SetProperties()
    {
        // use value of Width however you need
    }

    public SomeViewModel()
    {
         Width = Application.Current.MainPage.Width;
         var fireAndForget = Task.Run(GetWidthAsync);
    }

    public async Task GetWidthAsync()
    {
        while (Width == -1 || Width == 0)
        {
            await Task.Delay(TimeSpan.FromMilliseconds(1)).ConfigureAwait(false);
            // MainPage is the page that is using this ViewModel
            Width = Application.Current.MainPage.Width;
        }
    }
}

If you want to display Width in a label in your form for testing purposes using binding, don't forget to change the property from private to public.