在用户选择中更改标签的边框颜色

Question

我想在用户选择想要的颜色时更改标签的边框颜色。我知道标签的绘画事件可以改变边框的颜色。我只是想验证码：

private void label1_Paint(object sender, PaintEventArgs e) 
{ 
    ControlPaint.DrawBorder(e.Graphics, label1.DisplayRectangle, Color.Blue, ButtonBorderStyle.Solid); 
} 

上下工夫：

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
     if (comboBox1.SelectedIndex == 0) 
     { 
      //apply red color 
     } 
} 

组合框的选定索引（颜色用户想）申请。我只是不知道该怎么做。

Answer 1

Color selectedColor; 

private void label1_Paint(object sender, PaintEventArgs e) 
{ 
    base.OnPaint(e); 
    ControlPaint.DrawBorder(e.Graphics, label1.DisplayRectangle, selectedColor, ButtonBorderStyle.Solid); 
} 

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    if (comboBox1.SelectedIndex == 0) 
    { 
     selectedColor = Color.Red;   
    } 
    if (comboBox1.SelectedIndex == 1) 
    { 
     selectColor = Color.Blue; 
    } 
    label1.Invalidate(); 
    label1.Update(); 
}