WPF实现画线动画效果实例

需求：一条直线(不是曲线)，模范笔画一样在画布上逐渐画出来。但前提是，用后台代码实现，并非WPF标签

效果：

上代码：

///

/// Window2.xaml 的交互逻辑

///

public partial class Window2 : Window

{

public Window2()

{

InitializeComponent();

var canvas = new Canvas();

Content = canvas;

var points =

new List()

{

new Point(10, 10),

new Point(90, 90),

new Point(60, 10),

new Point(250, 90),

new Point(10, 10)

};

var sb = new Storyboard();

for (int i = 0; i < points.Count - 1; i++)

{

var lineGeometry = new LineGeometry(points[i], points[i]);

var path =

new Path()

{

Stroke = Brushes.Black,

StrokeThickness = 2,

Data = lineGeometry

};

canvas.Children.Add(path);

var animation =

new PointAnimation(points[i], points[i + 1], new Duration(TimeSpan.FromMilliseconds(1000)))

{

BeginTime = TimeSpan.FromMilliseconds(i * 1010)

};

sb.Children.Add(animation);

RegisterName("geometry" + i, lineGeometry);

Storyboard.SetTargetName(animation, "geometry" + i);

Storyboard.SetTargetProperty(animation, new PropertyPath(LineGeometry.EndPointProperty));

}

MouseDown += (s, e) => sb.Begin(this);

}

}