#71 Text change does not refresh issue

 Text change does not refresh issue

Author: yanjinhuagood

src/WPFDevelopers.Samples.Shared/ExampleViews/BadgeExample.xaml

@@ -36,8 +36,9 @@
                     Margin="10,0"
                     wd:Badge.FontSize="12"
                     wd:Badge.IsShow="{Binding ElementName=MyBadgeToggleButton, Path=IsChecked}"
-                    wd:Badge.Text="3"
+                    wd:Badge.Text="{Binding Text,RelativeSource={RelativeSource AncestorType=UserControl}}"
                     Content="Success"
+                    Click="myButton_Click" 
                     Style="{DynamicResource WD.SuccessDefaultButton}" />
                 <Button
                     Width="100"

src/WPFDevelopers.Samples.Shared/ExampleViews/BadgeExample.xaml.cs

@@ -1,4 +1,5 @@
-using System.Windows.Controls;
+using System.Windows;
+using System.Windows.Controls;
 
 namespace WPFDevelopers.Samples.ExampleViews
 {
@@ -7,9 +8,23 @@ namespace WPFDevelopers.Samples.ExampleViews
     /// </summary>
     public partial class BadgeExample : UserControl
     {
+        public string Text
+        {
+            get { return (string)GetValue(TextProperty); }
+            set { SetValue(TextProperty, value); }
+        }
+
+        public static readonly DependencyProperty TextProperty =
+            DependencyProperty.Register("Text", typeof(string), typeof(BadgeExample), new PropertyMetadata("3"));
+
         public BadgeExample()
         {
             InitializeComponent();
         }
+
+        private void myButton_Click(object sender, System.Windows.RoutedEventArgs e)
+        {
+            Text = "10";
+        }
     }
 }

src/WPFDevelopers.Shared/Controls/Badge/Badge.cs

@@ -1,20 +1,23 @@
 using System;
+using System.ComponentModel;
+using System.Reflection;
+using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Documents;
 using System.Windows.Media;
+using System.Xml.Linq;
 using WPFDevelopers.Helpers;
 
 namespace WPFDevelopers.Controls
 {
     public class Badge : Adorner
     {
         public static readonly DependencyProperty TextProperty =
-            DependencyProperty.Register("Text", typeof(string), typeof(Badge), new PropertyMetadata(string.Empty));
+            DependencyProperty.RegisterAttached("Text", typeof(string), typeof(Badge), new PropertyMetadata(string.Empty, OnTextChanged));
 
         public static readonly DependencyProperty FontSizeProperty =
             DependencyProperty.Register("FontSize", typeof(double), typeof(Badge), new PropertyMetadata(10.0d));
 
-
         public static readonly DependencyProperty IsShowProperty =
             DependencyProperty.RegisterAttached("IsShow", typeof(bool), typeof(Badge),
                 new PropertyMetadata(false, OnIsBadgeChanged));
@@ -118,6 +121,21 @@ public static void SetHorizontalOffset(UIElement element, string horizontalOffse
             element.SetValue(HorizontalOffsetProperty, horizontalOffset);
         }
 
+        private static void OnTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is FrameworkElement parent)
+            {
+                var isShow = GetIsShow(parent);
+                if (!isShow) return;
+                var newEventArgs = new DependencyPropertyChangedEventArgs(
+               e.Property,
+               false,
+               isShow);
+                OnIsBadgeChanged(d, newEventArgs);
+            }
+
+        }
+
         private static void OnIsBadgeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
         {
             if (e.NewValue is bool isShow && d is FrameworkElement parent)
@@ -140,7 +158,6 @@ private static void OnIsBadgeChanged(DependencyObject d, DependencyPropertyChang
         }
         private static void Parent_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
         {
-
             if (e.NewValue is bool isVisible && sender is FrameworkElement parent)
             {
                 var isShow = GetIsShow(parent);