CODEWITHSUNDEEP
c#wpfinotifypropertychanged
Majed DH
Majed DH

Reputation: 119

WPF automatically updates from INotifyPropertyChanged?

Does WPF framework automatically get the updates from INotifyPropertyChanged derived types to the Bindings in the UI?

Or do I have to do it manually ?

Upvotes: 0

Views: 208

Answers (3)

Ron Gross
Ron Gross

Reputation: 1622

semi-Manually :-)

When you implement "INotifyPropertyChanged" you will implement those methods (which are usually implemented the same)

    #region INotifyPropertyChanged
    protected void RaisePropertyChanged(string propertyName)
    {
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
    }
    protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        if (PropertyChanged != null) { PropertyChanged(this, e); }
    }
    public event PropertyChangedEventHandler PropertyChanged;
    #endregion

After that, when one of your properties has changed, you need to call "RaisePropertyChanged" with the name of the property that changed. usually in the setter of that property

Upvotes: 0

Sankarann
Sankarann

Reputation: 2665

Yes it is Semi manually,

    string _tText;
    public string Text
    {
        get { return _tText; }
        set
        {
            _tText = value;
            OnPropertyChanged("Text");
        }
    }

Here the property changed show call once the property is set with some value. OnPropertyChanged("Text");

Upvotes: 1

nvoigt
nvoigt

Reputation: 77364

If you implement INotifyPropertyChanged correctly, it's automatically.

Upvotes: 2

Related Questions