WPF流布局效果(拖动)示例源码

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Shapes;namespace WpfDrag{ /// <summary> /// Window1.xaml 的交互逻辑 /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); foreach (UIElement uiEle in LayoutRoot.Children) { //WPF设计上的问题,Button.Clicked事件Supress掉了Mouse.MouseLeftButtonDown附加事件等. //不加这个Button、TextBox等无法拖动 if (uiEle is Button || uiEle is TextBox) { uiEle.AddHandler(Button.MouseLeftButtonDownEvent, new MouseButtonEventHandler(Element_MouseLeftButtonDown), true); uiEle.AddHandler(Button.MouseMoveEvent, new MouseEventHandler(Element_MouseMove), true); uiEle.AddHandler(Button.MouseLeftButtonUpEvent, new MouseButtonEventHandler(Element_MouseLeftButtonUp), true); continue; } // uiEle.MouseMove = new MouseEventHandler(Element_MouseMove); uiEle.MouseLeftButtonDown = new MouseButtonEventHandler(Element_MouseLeftButtonDown); uiEle.MouseLeftButtonUp = new MouseButtonEventHandler(Element_MouseLeftButtonUp); } } bool isDragDropInEffect = false; Point pos = new Point(); void Element_MouseMove(object sender, MouseEventArgs e) { if (isDragDropInEffect) { FrameworkElement currEle = sender as FrameworkElement; double xPos = e.GetPosition(null).X - pos.X (double)currEle.GetValue(Canvas.LeftProperty); double yPos = e.GetPosition(null).Y - pos.Y (double)currEle.GetValue(Canvas.TopProperty); currEle.SetValue(Canvas.LeftProperty, xPos); currEle.SetValue(Canvas.TopProperty, yPos); pos = e.GetPosition(null); } } void Element_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { FrameworkElement fEle = sender as FrameworkElement; isDragDropInEffect = true; pos = e.GetPosition(null); fEle.CaptureMouse(); fEle.Cursor = Cursors.Hand; } void Element_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { if (isDragDropInEffect) { FrameworkElement ele = sender as FrameworkElement; isDragDropInEffect = false; ele.ReleaseMouseCapture(); } } }}