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);
+                }
+            }
+        }
+    }
+}