Data binding to the combobox, selected property trigger event, how shall we write the

CodePudding user response:

Ask everybody to help, very few points, solve it can help to download resources

CodePudding user response:

The string binding to comcobox, combobox selected items change, the trigger property

CodePudding user response:

Project is urgent, just contact with WPF, thank god

CodePudding user response:

So, I give an example, the code is not much, should be able to help explain what is property change event,

 & lt; Windows x: 
XMLNS="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
XMLNS: x="http://schemas.microsoft.com/winfx/2006/xaml" 
Title="MainWindow" Height="450" Width="800" & gt; 
 
 

 public partial class MainWindow: Window 
{
Public MainWindow () 
{
InitializeComponent(); 
Var my=new my () {Color="Blue"}; 
My. PropertyChanged +=delegate {MessageBox. Show (my) Color); }; 

ComboBox1. ItemsSource=new [] {" Red ", "Green", "Blue", "Yellow", "Cyan", "Magenta"}; 
ComboBox1. DataContext=my; 
} 

Public class My: INotifyPropertyChanged 
{
The public event PropertyChangedEventHandler PropertyChanged; 
Void NotifyPropertyChanged (string propertyName) 
{
PropertyChanged? Invoke (this, new PropertyChangedEventArgs (propertyName)); 
} 

String _color; 
Public string Color 
{
The get {return _color; } 
The set {the if (_color! Value)={_color=value; NotifyPropertyChanged (nameof (Color)); }} 
} 
} 
}