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

0 vote199 views2 answers
C# read large file
C#
3 votes242 views1 answer
Unity mouse scroll wheel axis
C#
0 vote247 views1 answer
Get execution directory c#
C#
0 vote259 views1 answer
Get all files in all subdirectories c#
C#
0 vote208 views1 answer
Get array from column datatable c#
C#
7 votes231 views1 answer
Count number of enum values C#
C#
33 votes201 views2 answers
How to instantiate a gameobject
C#
1 vote211 views1 answer
C# prime factorization
C#
-1 vote197 views2 answers
Remove specific character from string c#
C#
9 votes228 views1 answer
Unity get layer of gameobject
C#Unity