C# WinForm : Remove or Customize the 'Focus Rectangle' for Buttons 格式

Question

有没有办法禁用或更好地为常规按钮控件绘制您自己的焦点矩形! (那条虚线看起来很像 Windows 95ish)

我注意到控件属性 (FOR BUTTONS) 没有 ownerdrawfixed 设置(我不知道这是否是用于解决方案的路径，尽管我已经看到它用于自定义其他控件).

Answer 1

要做到这一点比听起来要棘手。毫无疑问，自定义按钮绘制不可覆盖的原因之一。这按预期工作:

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;

class MyButton : Button {
    private VisualStyleRenderer renderer;
    protected override void OnPaint(PaintEventArgs e) {
        base.OnPaint(e);
        if (this.Focused && Application.RenderWithVisualStyles && this.FlatStyle == FlatStyle.Standard) {
            if (renderer == null) {
                VisualStyleElement elem = VisualStyleElement.Button.PushButton.Normal;
                renderer = new VisualStyleRenderer(elem.ClassName, elem.Part, (int)PushButtonState.Normal);
            }
            Rectangle rc = renderer.GetBackgroundContentRectangle(e.Graphics, new Rectangle(0, 0, this.Width, this.Height));
            rc.Height--;
            rc.Width--;
            using (Pen p = new Pen(Brushes.DarkGray)) {
                e.Graphics.DrawRectangle(p, rc);
            }
        }
    }
}