用C# 实现鼠标框选效果的实现代码

用用C# 实现鼠标框选效果的实现代码实现鼠标框选效果的实现代码

本篇文章是对用C#实现鼠标框选效果的实现代码进行了详细的分析介绍，需要的朋友参考下

实现步骤：实现步骤：

1.实现整个鼠标框选的几个事件(down、move、up)，当鼠标点下记录鼠标框选的起点，鼠标抬起结束操作。

2.以鼠标框选过程中获取的鼠标坐标为基点计算框选的矩形的4点坐标,4点坐标以顺时针方向布点。

3.通过Shape.Path类实现在类上画出此矩形。

代码如下：

复制代码 代码如下:

this.Loaded += OnLoad;

this.MouseDown += OnMouseDown;

this.MouseMove += OnMouseMove;

this.MouseUp += OnMouseUp;

locus = new Path();

locus.Fill = new SolidColorBrush(Color.FromArgb(1, 255, 255, 255));

locus.Stroke = Brushes.Red;

locus.StrokeThickness = 1;

locus.IsManipulationEnabled = true;

}

locus.Data = DrawingRect(startpoint,endpoint);

}

}

void OnMouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e) {

if(!this.Children.Contains(locus)) this.Children.Add(locus);

if (locus.Data != null) locus.Data = null;

startpoint = e.GetPosition(this);

ispath = true;

}

void OnLoad(object sender, System.Windows.RoutedEventArgs e) {

figure.StartPoint = beginpoint;

PathSegmentCollection pathSegmentCollection = new PathSegmentCollection();

PathFigureCollection pathFigureCollection = new PathFigureCollection();

LineSegment m1 = new LineSegment();

m1.Point = new Point(closepoint.X, beginpoint.Y);

LineSegment m2 = new LineSegment();

m2.Point = closepoint;

LineSegment m3 = new LineSegment();

m3.Point = new Point(beginpoint.X, closepoint.Y);