C# 窗体。拖动事件

Question

我需要运行在关闭（结束）拖动点击时进行编码。这个活动怎么称呼？

这是主要示例，请查看以下屏幕截图以获取更多信息：

我做了我可以把汽车拖到其他图片框上，如下所示：

再重复一次 - 我需要知道事件是什么，然后你不去拖拽图片框？

Answer 1

我猜你在说 DragDrop. You can find example here: How to: Enable Drag-and-Drop Operations with the Windows Forms RichTextBox Control

Answer 2

没有关于何时在控件上释放拖动的事件，但您实际上并不需要一个。这就是我为模拟（我认为）您正在寻找的东西所做的。我使用了 this Whosebug answer

提供的代码

private Point? _mouseLocation;

private void Form1_Load(object sender, EventArgs e)
{
    this.pictureBox1.MouseDown += this.pictureBox1_MouseDown;
    this.pictureBox1.MouseUp += this.pictureBox1_MouseUp;
    this.pictureBox1.MouseMove += this.pictureBox1_MouseMove;    
}

void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{  
    if ( this._mouseLocation.HasValue)
    {
        this.pictureBox1.Left = e.X + this.pictureBox1.Left - this._mouseLocation.Value.X;
        this.pictureBox1.Top = e.Y + this.pictureBox1.Top - this._mouseLocation.Value.Y;
    }
}
void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
    this._mouseLocation = null;
}

void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
    //Check if you've left-clicked if you want
    this._mouseLocation = e.Location;

}

使用 this._mouseLocation = null; 将鼠标位置设置为空是您的 "drag released" 代码。

C# 窗体。拖动事件

C# winforms. Drag events

c#

drag-and-drop

mouseevent

winforms