Question

在我的程序中，我需要在Windows窗体中复制一个Label，并且我通过以下方式实现它：

public partial class Resizer : Form
{
    public Resizer()
    {
        InitializeComponent();
    }


    private Control toChange = new Control();
    private Control selected = new Control();

    private bool readyToMove = false;
    private Point offset;

    private void pictureBox4_Click(object sender, EventArgs e)
    {
        selected.Location = ((Control)sender).Location;
        selected.Size = ((Control)sender).Size;
    }

    private void backClick(object sender, EventArgs e)
    {
        selected = null;
    }

    private void Resizer_Load(object sender, EventArgs e)
    {
        pictureBox4.MouseDown += new MouseEventHandler(this.dynamicMouseDown);
        pictureBox4.MouseMove += new MouseEventHandler(this.dynamicMouseMove);
        pictureBox4.MouseUp += new MouseEventHandler(this.dynamicMouseUp);

    }

    private void dynamicMouseDown(object sender, MouseEventArgs e)
    {
        toChange = (Control)sender;
        selected.Location = ((Control)sender).Location;
        selected.Size = ((Control)sender).Size;
        readyToMove = true;
        offset = new Point(PointToClient(MousePosition).X - selected.Location.X, 
                           PointToClient(MousePosition).Y - selected.Location.Y);
    }

    private void dynamicMouseMove(object sender, MouseEventArgs e)
    {
        if (readyToMove)
        {
            selected.Location = new Point(PointToClient(MousePosition).X-offset.X,
                                          PointToClient(MousePosition).Y- offset.Y);
            this.Update();
        }
    }

    private void dynamicMouseUp(object sender, MouseEventArgs e)
    {
        toChange.Location = selected.Location;
        readyToMove = false;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        PictureBox pBox = (PictureBox)CloneObject(this.pictureBox4);
        this.Controls.Add(pBox);
//pBox.MouseDown += new MouseEventHandler(this.dynamicMouseDown);
//pBox.MouseMove += new MouseEventhandler(this.dynamicMouseMove);
//pBox.MouseUp += new MouseEventHandler(this.dynamicMouseUp);
//these eventhandlers did not help...

    }

    private object cloneObject(object o)
    {
        Type t = o.GetType();
        System.Reflection.PropertyInfo[] properties = t.GetProperties();

        Object p = t.InvokeMember("", 
                                  System.Reflection.BindingFlags.CreateInstance, 
                                  null, 
                                  o, 
                                  null);

        foreach (PropertyInfo pi in properties)
        {
            if (pi.CanWrite)
                 pi.SetValue(p, pi.GetValue(o, null), null);
        }
        return p;
    }
}

老问题：问题是，只要我点击labelOrigin，窗口就会冻结，我无法再关闭表单了。为什么这样，我该如何解决？现在：正如您所看到的，这实现了拖放操作，通过按下按钮，您可以复制表单。问题是，新的pBox不可移动并导致图形错误。在添加button1和pictureBox4

之后，此代码应该在一个简单的表单上工作

克隆标签导致C＃冻结

0 个答案: