How to use binding method for Isvisible Propery?

Question

I am new to Xamarin Forms and MVMM. And i need hide and unhide the label on runtime using MVMM concept. I am create the binding property and bound into it. But It not worked.

My Xaml code is:

< Label Text="The Error" IsVisible="{Binding IsVisible}"/>

And My ViewModel Code is :

private bool isvisible;
public event PropertyChangedEventHandler OnPropertyChanged; 
public void PropertyChanged([CallerMemberName] string propertyName = "")
{   
   this.OnPropertyChanged?.Invoke(this, new 
 PropertyChangedEventArgs(propertyName));

}

public bool IsVisible 
    {
         get
            {
                return isvisible;
            }
         set
            {
                isvisible = value;
                PropertyChanged();
            } 
    }

Once i set isvisible property into true the label is unhided. How to achieve that?

And what wrong i done with this...

Marcel Callo Marcel Callo · Accepted Answer · 2020-05-24T12:47:19

Make sure you define your viewmodel as the BindingContext of your view. The viewmodel should inherit the INotifyPropertyChanged. And then, setting the IsVisible to true or false in the viewmodel should work:

IsVisible = True; // Or False depending on your conditions

How to use binding method for Isvisible Propery?

1 Answers