在表单内拖动图片框 [英] Drag Picture box inside a form

问题描述

 class Sensor:PictureBox
    {  public Sensor():base()
        {
            this.Size = new System.Drawing.Size(50, 50);
            this.Location = new System.Drawing.Point(50, 50);
            this.BackColor = Color.Red;
        }
}

Form1.cs

In Form1.cs

Sensor sn = new Sensor();
       public Form1()
       {
           InitializeComponent();
           this.Controls.Add(sn)
       }

这是我的课我希望在Form上拖动这个传感器。这个代码应该在类中，这可能吗？任何最短的方法？

this is my class i want Drag this sensor on Form . the code of this should be in the class itself Is that possible ? any shortest method ?

推荐答案

请从这里开始：

http://msdn.microsoft.com/en-us/library/ms171546%28v=vs.110%29.aspx [< a href =http://msdn.microsoft.com/en-us/library/ms171546%28v=vs.110%29.aspxtarget =_ blanktitle =New Window> ^ ] ，

http://msdn.microsoft .com / zh-CN / library / aa984430％28v = vs.71％29.aspx [ ^ ]。

-SA

Please start here:
http://msdn.microsoft.com/en-us/library/ms171546%28v=vs.110%29.aspx[^],
http://msdn.microsoft.com/en-us/library/aa984430%28v=vs.71%29.aspx[^].

—SA

 class Sensor:PictureBox
    {
        private Point init_mouse, Curnt_mouse,init_loc;
        private bool IsDragable;
       
        public Sensor():base()
        {
            this.Size = new System.Drawing.Size(50, 50);
            this.Location = new System.Drawing.Point(50, 50);
            this.BackColor = Color.Red;
            this.MouseDown += new MouseEventHandler(Sensor_MouseDown);
            this.MouseUp += new MouseEventHandler(Sensor_MouseUp);
            this.MouseMove += new MouseEventHandler(Sensor_MouseMove);
            IsDragable = false;
           
        }

     
        void Sensor_MouseMove(object sender, MouseEventArgs e)
        {
            if (IsDragable)
            {
                Curnt_mouse = Cursor.Position;
                int dx = Curnt_mouse.X - init_mouse.X;
                int dy = Curnt_mouse.Y - init_mouse.Y;
                this.Location = new Point(init_loc.X + dx, init_loc.Y + dy);
            }
        }

        void Sensor_MouseUp(object sender, MouseEventArgs e)
        {
            IsDragable = false;
            
        }

        void Sensor_MouseDown(object sender, MouseEventArgs e)
        {
            IsDragable = true;
            init_mouse= Cursor.Position;
            init_loc = this.Location;
        }

    }
}

试过这个并且工作了

如果有更好的选择，请建议。

tried this and worked
if any better option please suggest.

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