WPF实现拖拽方法

第一种方式：利用WPF的thumb控件

 
       
           
       
       
           
           
       
       
   

 

后台代码

  private void Thumb_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
        {
            Canvas.SetLeft(canvas1, Canvas.GetLeft(canvas1) + e.HorizontalChange);
            Canvas.SetTop(canvas1, Canvas.GetTop(canvas1) + e.VerticalChange);
        }

        private void thumb2_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
        {
            Canvas.SetLeft(aaa, Canvas.GetLeft(aaa) + e.HorizontalChange);
            Canvas.SetTop(aaa,Canvas.GetTop(aaa)+e.VerticalChange);
        }

 

第二种方式

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Window1" Height="300" Width="300">

window1.xaml.cs

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.Navigation;

using System.Windows.Shapes;

namespace WpfDragContrl

{

 ///

 /// Interaction logic for Window1.xaml

 ///

 public partial class Window1 : Window

 {

 Path connector = new Path();

 private PathGeometry connectorGeometry;

 private PathFigure connectorPoints;

 private BezierSegment connectorCurve;

 public Window1()

 {

 InitializeComponent();

 

 connector.Stroke = Brushes.Red;

 connector.StrokeThickness = 3;

 connectorGeometry = new PathGeometry();

 connectorPoints = new PathFigure();

 connectorCurve = new BezierSegment();

 SetBezierLine();

 connectorPoints.Segments.Add(connectorCurve);

 connectorGeometry.Figures.Add(connectorPoints);

 connector.Data = connectorGeometry;

 container.Children.Add(connector);

 }

 private void SetBezierLine()

 {

 connectorPoints.StartPoint =new Point((double)c1.GetValue(Canvas.LeftProperty) + c1.Width / 2,(double)c1.GetValue(Canvas.TopProperty) + c1.Height / 2);

 var endpoint= new Point((double)c2.GetValue(Canvas.LeftProperty) + c2.Width / 2,(double)c2.GetValue(Canvas.TopProperty) + c2.Height / 2);

 connectorCurve.Point1 = new Point(50,50);

 connectorCurve.Point2 = new Point(80,58);

 connectorCurve.Point3 = endpoint;

 }

 private void c_MouseMove(object sender, MouseEventArgs e)

 {

 if(!isdrag) return;

 var control = (sender as UIElement);

control.SetValue(Canvas.LeftProperty, e.GetPosition(container).X-control.DesiredSize.Width/2);

control.SetValue(Canvas.TopProperty, e.GetPosition(container).Y-control.DesiredSize.Height/2);

var vector= VisualTreeHelper.GetOffset(control);

this.Title=vector.X+"/"+vector.Y;

SetBezierLine();

}

private bool isdrag = false;

private void c_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

{

isdrag = true;

}

private void c_MouseUp(object sender, MouseButtonEventArgs e)

{

isdrag = false;

}

private void DrawBezierLine(UIElement element1,UIElement element2)

{

}

}

}