Server-Side UI Automation Provider - WPF Sample

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Windows; 6 using System.Windows.Controls; 7 using System.Windows.Data; 8 using System.Windows.Documents; 9 using System.Windows.Input;10 using System.Windows.Media;11 using System.Windows.Media.Imaging;12 using System.Windows.Navigation;13 using System.Windows.Shapes;14 using System.Windows.Automation.Peers;15 using System.Windows.Automation.Provider;16 namespace WpfServerProvider17 {18     /// <summary>19     /// Interaction logic for MainWindow.xaml20     /// </summary>21     public partial class MainWindow : Window22     {23         public MainWindow()24         {25             InitializeComponent();26             UIAButton btn = new UIAButton();27             btn.Content = "TestButton";28             this.Content = btn;29         }30     }31     //My WPF button class, derive from WPF Button class32     public class UIAButton : Button33     {34         //Override this function to return my derived AutomationPeer class35         protected override AutomationPeer OnCreateAutomationPeer()36         {37             return new UIAButtonAutomationPeer(this);38         }39     }40     //My AutomationPeer class41     //Add implementation of UI ValuePattern comparing with base implementation    42     public class UIAButtonAutomationPeer : ButtonAutomationPeer, IValueProvider43     {44         //owner parameter is the WPF Button instance45         public UIAButtonAutomationPeer(Button owner)46             : base(owner)47         {48         }49         //Return UIA Name property50         protected override string GetNameCore()51         {52             string originalName = base.GetNameCore();53             return string.Format("{0} {1}", originalName, DateTime.Now.ToLongTimeString());54         }55         //Return ValuePattern interface        56         public override object GetPattern(PatternInterface patternInterface)57         {58             if (patternInterface == PatternInterface.Value)59             {60                 return this;61             }62             return null;63         }64         public bool IsReadOnly { get { return true; } }65         //ValuePattern‘s implementation66         public string Value67         {68             get69             {70                 return string.Format("Height={0},Wideth={1}",71                     Owner.RenderSize.Height, Owner.RenderSize.Width);72             }73         }74         public void SetValue(string value) { }75     }76 }