添加项目文件。

SamplePreSystem.UI/Behaviors/BorderMouseMoveBehavior.cs

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+using Microsoft.Xaml.Behaviors;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace SamplePreSystem.UI.Behaviors
+{
+    public class BorderMouseMoveBehavior :Behavior<Border>
+    {
+
+        protected override void OnAttached()
+        {
+            //base.OnAttached();
+
+            AssociatedObject.MouseMove += AssociatedObject_MouseMove;
+        }
+
+        private void AssociatedObject_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
+        {
+            if (e.LeftButton == MouseButtonState.Pressed)
+            {
+                // 获取窗口并执行拖拽
+                if (Window.GetWindow(AssociatedObject) is Window window)
+                {
+                    window.DragMove();
+                }
+            }
+        }
+    }
+}

SamplePreSystem.UI/Behaviors/DataGridDragBehavior.cs

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+using Microsoft.Xaml.Behaviors;
+using SamplePre.Models;
+using SamplePreSystem.UI.ViewModel.SopManager;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace SamplePreSystem.UI.Behaviors
+{
+    public class DataGridDragBehavior :Behavior<DataGrid>
+    {
+        protected override void OnAttached()
+        {
+            //拖拽进入
+            AssociatedObject.DragEnter += AssociatedObject_DragEnter;
+
+            AssociatedObject.Drop += AssociatedObject_Drop;
+
+        }
+
+
+
+
+
+        public ICommand DropCompletedCommand
+        {
+            get { return (ICommand)GetValue(DropCompletedCommandProperty); }
+            set { SetValue(DropCompletedCommandProperty, value); }
+        }
+
+        // Using a DependencyProperty as the backing store for DropCompletedCommand.  This enables animation, styling, binding, etc...
+        public static readonly DependencyProperty DropCompletedCommandProperty =
+            DependencyProperty.Register("DropCompletedCommand", typeof(ICommand), typeof(DataGridDragBehavior), new PropertyMetadata(null));
+
+
+
+        //// 可选：传递参数（比如拖拽后的数据源、拖拽前后索引）
+        //public static readonly DependencyProperty DropCommandParameterProperty =
+        //    DependencyProperty.Register(
+        //        nameof(DropCommandParameter),
+        //        typeof(object),
+        //        typeof(DataGridDragBehavior));
+
+        //public object DropCommandParameter
+        //{
+        //    get => GetValue(DropCommandParameterProperty);
+        //    set => SetValue(DropCommandParameterProperty, value);
+        //}
+
+
+
+        private void AssociatedObject_Drop(object sender, DragEventArgs e)
+        {
+
+            // 获取拖拽的数据
+            if (e.Data.GetData(typeof(TreeListItem)) is TreeListItem dropItem)
+            {
+
+                if (dropItem == null) return;
+
+                //var dataContext = this.DataContext as SopMangerViewModel;
+                //dataContext.AddDragSopAction(dropItem);
+                if (DropCompletedCommand != null && DropCompletedCommand.CanExecute(dropItem))
+                {
+                    DropCompletedCommand.Execute(dropItem);
+                }
+
+            }
+
+
+        }
+
+        private void AssociatedObject_DragEnter(object sender, System.Windows.DragEventArgs e)
+        {
+            // 验证拖拽数据类型是否是我们需要的TreeItemModel
+            if (!e.Data.GetDataPresent(typeof(TreeListItem)))
+            {
+                e.Effects = DragDropEffects.None;
+            }
+        }
+
+
+
+    }
+}

SamplePreSystem.UI/Behaviors/TreeViewDragBehavior.cs

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+using Microsoft.Xaml.Behaviors;
+using SamplePre.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace SamplePreSystem.UI.Behaviors
+{
+    public class TreeViewDragBehavior :Behavior<TreeView>
+    {
+
+        // 拖拽起始点（用于判断是否是有效拖拽）
+        private Point _dragStartPoint;
+
+        protected override void OnAttached()
+        {
+
+            //记录鼠标按下时的坐标
+            AssociatedObject.PreviewMouseLeftButtonDown += AssociatedObject_PreviewMouseLeftButtonDown;
+
+            //处理TreeView的鼠标移动事件，触发拖拽
+            AssociatedObject.PreviewMouseMove += AssociatedObject_PreviewMouseMove;
+        }
+
+        /// <summary>
+        /// 处理TreeView的鼠标移动事件，触发拖拽
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        /// <exception cref="NotImplementedException"></exception>
+        private void AssociatedObject_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
+        {
+            // 获取当前鼠标位置
+            Point currentPoint = e.GetPosition(null);
+            // 计算鼠标移动的距离（过滤掉微小移动，避免误触发拖拽）
+            Vector dragVector = _dragStartPoint - currentPoint;
+
+            // 如果鼠标左键按下，且移动距离超过阈值（系统默认的拖拽阈值），则开始拖拽
+            if (e.LeftButton == MouseButtonState.Pressed &&
+                (Math.Abs(dragVector.X) > SystemParameters.MinimumHorizontalDragDistance ||
+                 Math.Abs(dragVector.Y) > SystemParameters.MinimumVerticalDragDistance))
+            {
+                // 获取当前鼠标下的TreeViewItem
+                var treeViewItem = FindVisualParent<TreeViewItem>(e.OriginalSource as DependencyObject);
+                if (treeViewItem != null && treeViewItem.DataContext is TreeListItem dragItem)
+                {
+                    // 开始拖拽，设置拖拽数据和拖拽效果
+                    DragDrop.DoDragDrop(treeViewItem, dragItem, DragDropEffects.Copy);
+                }
+            }
+        }
+
+        /// <summary>
+        /// 查找可视化树中的父级控件（通用方法）
+        /// </summary>
+        private T FindVisualParent<T>(DependencyObject child) where T : DependencyObject
+        {
+            DependencyObject parentObject = VisualTreeHelper.GetParent(child);
+            if (parentObject == null) return null;
+
+            if (parentObject is T parent)
+                return parent;
+            else
+                return FindVisualParent<T>(parentObject);
+        }
+
+
+
+        private void AssociatedObject_PreviewMouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
+        {
+            // 记录鼠标按下时的坐标
+            _dragStartPoint = e.GetPosition(null);
+        }
+
+
+
+
+    }
+}