Question

（重金悬赏）WPF C# 实现用鼠标手动画折线（要大概的思路和具体的代码“急用”）

注意：“要用C#实现”三段折线，最好能实现左键（按下抬起）开始画线，再次点击左键（按下抬起）——第一段折线画完，再次点击左键（按下抬起）——第二段折线画完，再次点击左键，第三段折线画完后，点击右键取消鼠标画线状态，如下图：

Answer 1

两个分都给我吧

后台代码
bool flag = false;
private void canvas_MouseMove(object sender, MouseEventArgs e)
{
if (flag == false)
return;
polyline.Points[polyline.Points.Count - 1] = e.GetPosition(canvas);
Console.WriteLine("Move: " + polyline.Points[polyline.Points.Count - 1]);
}
private void canvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
flag = true;
polyline.Points.Add(e.GetPosition(canvas));
if (polyline.Points.Count == 1)
polyline.Points.Add(e.GetPosition(canvas));

Console.WriteLine("Left Down: " + e.GetPosition(canvas));
}
private void canvas_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
flag = false;
Console.WriteLine("Right Down: " + e.GetPosition(canvas));
}

下面是xaml
<Canvas Name="canvas" MouseMove="canvas_MouseMove" MouseLeftButtonDown="canvas_MouseLeftButtonDown" MouseRightButtonDown="canvas_MouseRightButtonDown" Background="#FF4787E8">

<Polyline Name="polyline" Stroke="Red" StrokeThickness="3">

</Polyline>

</Canvas>

Answer 2

Blend for visual studio~~~~里边有这个功能

追问

我用的是WPF