如何允许用户移动窗体上的控件

这方面的代码可能有点复杂,但实际上需要在窗体上捕获MouseDown、MouseMove和MouseUp事件。像这样:

public void Form1_MouseDown(object sender, MouseEventArgs e)
{
    if(e.Button != MouseButton.Left)
        return;

    // Might want to pad these values a bit if the line is only 1px,
    // might be hard for the user to hit directly
    if(e.Y == myControl.Top)
    {
        if(e.X >= myControl.Left && e.X <= myControl.Left + myControl.Width)
        {
            _capturingMoves = true;
            return;
        }
    }

    _capturingMoves = false;
}

public void Form1_MouseMove(object sender, MouseEventArgs e) 
{
    if(!_capturingMoves)
        return;

    // Calculate the delta's and move the line here
}

public void Form1_MouseUp(object sender, MouseEventArgs e) 
{
    if(_capturingMoves)
    {
        _capturingMoves = false;
        // Do any final placement
    }
}

在WinForms中,可以处理控件的MouseDown、MouseMove和MouseUp事件。在MouseDown上,设置一些位或引用来告诉窗体单击鼠标的控件,并从MouseEventArgs捕获鼠标的X和Y。在MouseMove上,如果设置了控件,则根据上次捕获的X和Y与当前坐标之间的差来调整其X和Y。在MouseUp上,释放控件。

我会为此设置一个“编辑模式”;当用户进入此模式时,窗体控件的当前事件处理程序应该分离,移动处理程序应该附加。如果您想持久化或还原这些更改(比如您正在制作一个自定义窗体设计器,您的客户端可以使用它来自定义窗口布局),您还需要能够对控件的前后布局进行某种快照。

我编写了一个组件来实现这一点:在窗体上移动控件(或在屏幕上移动无边界窗体)。您甚至可以从设计器中使用它,而无需编写任何代码。

http://www.thomaslevesque.com/2009/05/06/windows-forms-automatically-drag-and-drop-controls-dragmove/

Rx 基于 A Brief Introduction to the Reactive Extensions for .NET, Rx 邮寄和样品由Wes Dyer。

public static class FormExtensions
{
    public static void EnableDragging(this Control c)
    {
        // Long way, but strongly typed.        
        var downs =
            from down in Observable.FromEvent<MouseEventHandler, MouseEventArgs>(
                eh => new MouseEventHandler(eh),
                eh => c.MouseDown += eh,
                eh => c.MouseDown -= eh)
            select new { down.EventArgs.X, down.EventArgs.Y };

        // Short way.        
        var moves = from move in Observable.FromEvent<MouseEventArgs>(c, "MouseMove")
                    select new { move.EventArgs.X, move.EventArgs.Y };

        var ups = Observable.FromEvent<MouseEventArgs>(c, "MouseUp");

        var drags = from down in downs
                    from move in moves.TakeUntil(ups)
                    select new Point { X = move.X - down.X, Y = move.Y - down.Y };

        drags.Subscribe(drag => c.SetBounds(c.Location.X + drag.X, c.Location.Y + drag.Y, 0, 0, BoundsSpecified.Location));
    }
}

用法:

Button button1=新建按钮();

老实说,有一种更简单的方法,初始化一个全局布尔变量,不管你喜欢什么,在这里, isMouseClicked . 在您的控件上,您希望允许拖动您转到它的鼠标按下事件,

确保这些事件是控件事件而不是窗体事件。

if (e.button == MouseButtons.left)
    //this is where you set the boolean to true

if (isMouseClicked == true)
    //You then set your location of your control. See below:
    Button1.Location = new Point(MousePosition.X, MousePosition.Y);

在你的鼠标上一定要设置你的 已单击鼠标 到 false ;