如何计算鼠标点击时移动的距离

Question

我有这个代码：

private void Form1_MouseClick(object sender, MouseEventArgs e)
{
    if(chckeckbox.checked)
    {
      //the distance that the mouse made when the left click remained clicked
    }
}

我必须通过什么来更改评论才能使其有效？除此之外我的如果它已经在一个事件中找到所以我有点迷路......我必须把它放在另一个事件中或者它在这里？

PS : 我曾经尝试过类似的东西，但它一直给我 0。

Form1 testa = new Form1();
Point i = testa.Location;
Point z = testa.Location;
int res = i.X - z.X;
int pls = i.Y - z.Y;

Answer 1

处理 MouseDown 并保持这一点。然后在MouseClick事件中计算距离：

Point p1;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
    p1 = e.Location;
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
    MessageBox.Show($"dx = {e.Location.X - p1.X}, dy= {e.Location.Y - p1.Y}");
}

如何计算鼠标点击时移动的距离

How to calculate the distance that the mouse moved during click

.net

c#

mouseclick-event

winforms