c# - 如何在 C# 中以编程方式将一堆控件居中

Question

我是这个社区的新手，我有这个应用程序可以通过编程方式添加控件。我想将所有添加的控件居中，就像选择它们并在 Visual Studio 上按中心一样。不，我不想把每一个放在一边。这是我用来获取所有控件的代码:

    private void GetAllControl(Control c, List<Control> list)
    {
        //gets all controls and saves them to a list
        foreach (Control control in c.Controls)
        {
            list.Add(control);
        }
    }

    //And then call it like this

        List<Control> list = new List<Control>();
        GetAllControl(PNL_custom, list);
        foreach (Play_panel m in list)
        {
            //And here I want to insert that center code
        }

提前致谢

VB理论

Answer 1

以下是如何将控件作为GROUP 居中。除了我们计算组的质心必须移动多远才能成为父控件的中心外，它几乎与以前相同。然后我们遍历所有控件并将它们的位置偏移那么多。这使它们都居中，同时保持它们彼此的相对位置:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        List<Control> list = new List<Control>();
        GetAllControl(PNL_custom, list);
        CenterControlsAsGroup(list, Direction.Both); // center group in the center of the parent
    }

    public enum Direction
    {
        Vertical,
        Horizontal,
        Both
    }

    private void CenterControlsAsGroup(List<Control> controls, Direction direction)
    {
        if (controls.Count > 1)
        {
            int xSum = 0;
            int ySum = 0;
            Point center;
            foreach (Control ctl in controls)
            {
                center = new Point(ctl.Location.X + ctl.Width / 2, ctl.Location.Y + ctl.Height / 2);
                xSum = xSum + center.X;
                ySum = ySum + center.Y;
            }
            Point average = new Point(xSum / controls.Count, ySum / controls.Count);

            center = new Point(controls[0].Parent.Width / 2, controls[0].Parent.Height / 2);
            int xOffset = center.X - average.X;
            int yOffset = center.Y - average.Y;

            foreach (Control ctl in controls)
            {
                switch (direction)
                {
                    case Direction.Vertical:
                        ctl.Location = new Point(ctl.Location.X + xOffset, ctl.Location.Y);
                        break;

                    case Direction.Horizontal:
                        ctl.Location = new Point(ctl.Location.X, ctl.Location.Y + yOffset);
                        break;

                    case Direction.Both:
                        ctl.Location = new Point(ctl.Location.X + xOffset, ctl.Location.Y + yOffset);
                        break;
                }
            }
        }
    }

    private void GetAllControl(Control c, List<Control> list)
    {
        //gets all controls and saves them to a list
        foreach (Control control in c.Controls)
        {
            list.Add(control);
        }
    }

}