WPF simple TextBox data binding

Question

I have this class   public partial class Window1   Window       public String Name2       public Window1                 InitializeComponent            Name2   new String  a   5           myGrid DataContext   this                        And I want to display the string Name2 in the textbox    lt Grid Name  myGrid  Height  437 274  gt     lt TextBox Text   Binding Path Name2    gt   lt  Grid gt    But the string isn t displayed  Also  if the string Name2 is updated periodically using a TimerCallback  do I need to do anything to make sure the textbox is updated when the data changes

User · Answer

Your Window is not implementing the necessary data binding notifications that the grid requires to use it as a data source, namely the INotifyPropertyChanged interface.

Your "Name2" string needs also to be a property and not a public variable, as data binding is for use with properties.

Implementing the necessary interfaces for using an object as a data source can be found here.

User · Answer

Just for future needs   In Visual Studio 2013 with  NET Framework 4 5  for a window property  try adding ElementName window to make it work    lt Grid Name  myGrid  Height  437 274  gt     lt TextBox Text   Binding Path Name2  ElementName window    gt   lt  Grid gt

User · Answer

Name2 is a field   WPF binds only to properties   Change it to   public string Name2   get  set      Be warned that with this minimal implementation  your TextBox won t respond to programmatic changes to Name2   So for your timer update scenario  you ll need to implement INotifyPropertyChanged   partial class Window1   Window  INotifyPropertyChanged     public event PropertyChangedEventHandler PropertyChanged     protected void OnPropertyChanged string propertyName              PropertyChanged  Invoke this  new PropertyChangedEventArgs propertyName           private string  name2     public string Name2         get   return  name2        set             if  value     name2                    name2   value           OnPropertyChanged  Name2                          You should consider moving this to a separate data object rather than on your Window class

[wpf] WPF: simple TextBox data binding

Examples related to wpf

Examples related to data-binding

Examples related to textbox