Ilist validation wpf mvvm

class MainWindowViewModel : INotifyPropertyChanged
{
    public ICommand SaveItem
    {
        get { return new SimpleCommand(SaveItemExecute, CanSaveItem); }
    }

    public void SaveItemExecute()
    {
        //save
    }

    private bool CanSaveItem()
    {
        return IsValid;
    }

    //I set up here a breakpoint and it returns the correct value just once.
    //The application looked up on CanSaveItem all the time and except the first time, it returns wrong value
    private bool _isValid;
    public bool IsValid
    {
        get { return _isValid; }
        set
        {
            _isValid = value;
            OnPropertyChanged("IsValid");
        }
    }

    public string EnteredText { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
        {
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

}

Source: coderedirect.com

Similar codes

1 vote361 views1 answer
Remove last instance of string c#
C#
0 vote373 views2 answers
Autoit console write
C#
3 votes392 views2 answers
Unity pause coroutine
C#Unity
0 vote329 views1 answer
Cancellationtoken.linkedtokensource c# example
C#
0 vote376 views1 answer
How to unfocus a richtextbox windows forms
C#
1 vote382 views1 answer
How o remove .meta files visual studio code
C#
-2 votes383 views4 answers
C# datagridview selected row index
C#
0 vote323 views1 answer
Json string to JObject object c# camelCasing key .net
C#
1 vote339 views1 answer
Unity knowing when 0 input is pressed
C#
1 vote347 views1 answer
C# override index operator
C#