winforms - 减少 FlowLayoutPanel 中的水平空间

Question

见图片我想减少每行控件之间的水平空间。

此 Windows 形成 FlowLayoutPanel。我已经用红色突出显示了一个单元格以显示当前的间距。

Answer 1

通过从面板派生，您可以很容易地创建自己的自定义 FlowLayoutPanel。

虽然下面的代码为水平和垂直设置了一个统一的边框，但您可以很容易地修改为每个水平和垂直间距都有一个属性。

public class FlowPanel : Panel
{
    protected int _TileBorder;
    public int TileBorder
    {
        get
        {
            return this._TileBorder;
        }
        set
        {
            this._TileBorder = value;
            this.RearrangeControls(this, this.TileBorder);
        }
    }
    public FlowPanel()
    {
        this.AutoScroll = true;
    }
    public FlowPanel(int tileBorder)
    {
        this.AutoScroll = true;
        this.TileBorder = tileBorder;
    }
    protected override void OnSizeChanged(EventArgs e)
    {
        base.OnSizeChanged(e);
        this.RearrangeControls(this, this.TileBorder);
    }
    protected override void OnControlAdded(ControlEventArgs e)
    {
        base.OnControlAdded(e);
        this.RearrangeControls(this, this.TileBorder);
        e.Control.SizeChanged += new EventHandler(this.Control_SizeChanged);
    }
    protected override void OnControlRemoved(ControlEventArgs e)
    {
        base.OnControlRemoved(e);
        this.RearrangeControls(this, this.TileBorder);
        e.Control.SizeChanged -= new EventHandler(this.Control_SizeChanged);
    }
    protected void RearrangeControls(Panel p, int border)
    {
        int num = border;
        int num2 = border;
        int num3 = 0;
        bool flag = true;
        foreach (Control control in p.Controls)
        {
            if (control != null)
            {
                num3 = ((control.Height > num3) ? control.Height : num3);
                if (flag)
                {
                    num += control.Width + border;
                    control.Location = new Point(border, border);
                    flag = false;
                }
                else
                {
                    if (num + control.Width + 2 * border > p.Width)
                    {
                        num2 += num3 + border;
                        control.Location = new Point(border, num2);
                        num = border + (control.Width + border);
                        num3 = control.Height;
                    }
                    else
                    {
                        control.Location = new Point(num, num2);
                        num += control.Width + border;
                    }
                }
            }
        }
    }
    private void Control_SizeChanged(object sender, EventArgs e)
    {
        this.RearrangeControls(this, this.TileBorder);
    }
}

现在我看了一下，RearrangeControls 方法对我来说确实看起来有点匆忙，但我相信你可以让它变得更好！