Question

如何改变C#的Panel控件的边框颜色

Answer 1

添加一个Panel控件之后,双击就打开了Panel控件的Panit事件处理方法. 

private void panel1_Paint(object sender, PaintEventArgs e) 
        { 
            ControlPaint.DrawBorder(e.Graphics, 
                                        panel4.ClientRectangle, 
                                        Color.Red, 
                                        3, 
                                        ButtonBorderStyle.Solid, 
                                        Color.Red, 
                                        3, 
                                        ButtonBorderStyle.Solid, 
                                        Color.Red, 
                                        3, 
                                        ButtonBorderStyle.Solid, 
                                        Color.Red, 
                                        3, 
                                        ButtonBorderStyle.Solid); 
        }

Answer 2

定义一个颜色变量
private Color panelBorderColor=Color.Red;
在Panel的Paint事件中添加以下代码：
private void panelControl1_Paint(object sender, PaintEventArgs e)
{
ControlPaint.DrawBorder(e.Graphics,
this.panelControl1.ClientRectangle,
panelBorderColor, 1, ButtonBorderStyle.Solid,
panelBorderColor, 1, ButtonBorderStyle.Solid,
panelBorderColor, 1, ButtonBorderStyle.Solid,
panelBorderColor, 1, ButtonBorderStyle.Solid);
}
在按钮事件中添加以下代码：
private void simpleButton1_Click(object sender, EventArgs e)
{
panelBorderColor = Color.Pink;
panelControl1.Invalidate();
panelControl1.Update();
}