Question

我尝试将一个事件处理程序添加到继承自.NET类＆＃34; Panel＆＃34;的人员类中。

我尝试了几种方法，但它不再起作用了......

我有一个包含其他Panel的主要小组。它是设计Grafcet的。

所以我有我的班级＆＃34; Etape＆＃34;继承自Panel：

 class Etape : Panel
    {
        private Point MouseDownLocation;

        private void Etape_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                MouseDownLocation = e.Location;
                this.BackColor = CouleurSelect;
                MessageBox.Show("Bonjour");
            }
        }

        private void Etape_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.Left = e.X + this.Left - MouseDownLocation.X;
                this.Top = e.Y + this.Top - MouseDownLocation.Y;
            }
        }
    }

我宣布它是这样的：

 toto = new Etape();
 toto.BackColor = Color.White;
 toto.BorderStyle = BorderStyle.FixedSingle;
 toto.Width = 40;
 toto.Height = 40;

＆＃34; TOTO＆＃34;是我的＆＃34;校长＆＃34;小组就在那之后。我想添加一个Eventhandler来在运行时移动我的面板。我尝试了上面可以看到的代码，但我认为C＃没有检测到我点击了Etape。

你有什么想法可以帮助我吗？

于连

Answer 1

您应该覆盖OnMouseXXX方法：

class Etape : Panel
{
    private Point MouseDownLocation;

    protected override void OnMouseDown(MouseEventArgs e)
    {
        base.OnMouseDown(e);

        if (e.Button == MouseButtons.Left)
        {
            MouseDownLocation = e.Location;
            this.BackColor = CouleurSelect;
            MessageBox.Show("Bonjour");
        }
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {
        base.OnMouseMove(e);

        if (e.Button == MouseButtons.Left)
        {
            this.Left = e.X + this.Left - MouseDownLocation.X;
            this.Top = e.Y + this.Top - MouseDownLocation.Y;
        }
    }
}

只是声明一个名为Etape_MouseMove()的方法并不会将任何内容挂钩。

Answer 2

您需要将函数挂钩到事件

class Etape : Panel
    {
        public Etape()
        {
            MouseDown += Etape_MouseDown;
            MouseMove += Etape_MouseMove;
        }

        private Point MouseDownLocation;

        private void Etape_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                MouseDownLocation = e.Location;
                this.BackColor = CouleurSelect;
                MessageBox.Show("Bonjour");
            }
        }

        private void Etape_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.Left = e.X + this.Left - MouseDownLocation.X;
                this.Top = e.Y + this.Top - MouseDownLocation.Y;
            }
        }
    }

在运行时在类上添加MouseDown和MouseMove事件

2 个答案: