添加项目文件。

UIShare/Behaviors/MouseDoubleClickBehavior.cs

@@ -0,0 +1,54 @@
+using Microsoft.Xaml.Behaviors;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace UIShare.Behaviors
+{
+    //给Border添加双击事件
+    public class MouseDoubleClickBehavior : Behavior<Border>
+    {
+        public static readonly DependencyProperty CommandProperty =
+            DependencyProperty.Register("Command", typeof(ICommand), typeof(MouseDoubleClickBehavior), new PropertyMetadata(null));
+
+        public ICommand Command
+        {
+            get => (ICommand)GetValue(CommandProperty);
+            set => SetValue(CommandProperty, value);
+        }
+
+        public static readonly DependencyProperty CommandParameterProperty =
+            DependencyProperty.Register("CommandParameter", typeof(object), typeof(MouseDoubleClickBehavior), new PropertyMetadata(null));
+
+        public object CommandParameter
+        {
+            get => GetValue(CommandParameterProperty);
+            set => SetValue(CommandParameterProperty, value);
+        }
+
+        protected override void OnAttached()
+        {
+            base.OnAttached();
+            // 确保 Border 的 Background 不为 null，否则无法触发点击事件
+            this.AssociatedObject.MouseLeftButtonDown += OnMouseLeftButtonDown;
+        }
+
+        protected override void OnDetaching()
+        {
+            base.OnDetaching();
+            this.AssociatedObject.MouseLeftButtonDown -= OnMouseLeftButtonDown;
+        }
+
+        private void OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            // 判断点击次数是否为 2
+            if (e.ClickCount == 2)
+            {
+                if (Command != null && Command.CanExecute(CommandParameter))
+                {
+                    Command.Execute(CommandParameter);
+                }
+            }
+        }
+    }
+}

UIShare/Behaviors/TabControlSelectionChangedBehavior.cs

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+using Microsoft.Xaml.Behaviors;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace UIShare.Behaviors
+{
+    public class TabControlSelectionChangedBehavior : Behavior<TabControl>
+    {
+        public static readonly DependencyProperty CommandProperty =
+            DependencyProperty.Register(
+                "Command", typeof(ICommand), typeof(TabControlSelectionChangedBehavior), new PropertyMetadata(null));
+
+        public static readonly DependencyProperty CommandParameterProperty =
+            DependencyProperty.Register(
+                "CommandParameter", typeof(object), typeof(TabControlSelectionChangedBehavior), new PropertyMetadata(null));
+
+        public ICommand Command
+        {
+            get { return (ICommand)GetValue(CommandProperty); }
+            set { SetValue(CommandProperty, value); }
+        }
+
+        public object CommandParameter
+        {
+            get { return GetValue(CommandParameterProperty); }
+            set { SetValue(CommandParameterProperty, value); }
+        }
+
+        protected override void OnAttached()
+        {
+            base.OnAttached();
+            if (AssociatedObject != null)
+            {
+                AssociatedObject.SelectionChanged += OnSelectionChanged;
+            }
+        }
+
+        protected override void OnDetaching()
+        {
+            if (AssociatedObject != null)
+            {
+                AssociatedObject.SelectionChanged -= OnSelectionChanged;
+            }
+            base.OnDetaching();
+        }
+
+        private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            var tabItem = AssociatedObject.SelectedItem as TabItem;
+            // 获取选中 TabItem 的 Header
+            if (Command != null && Command.CanExecute(tabItem.Header))
+            {
+                // 使用选中 TabItem 的 Header 作为 CommandParameter
+                Command.Execute(((TabItem)AssociatedObject.SelectedItem)?.Header);
+            }
+        }
+    }
+}