使用
private void Form1_Load(object sender, EventArgs e)
{
colorComboBox1.Initialize();
}
private void colorComboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
panel1.BackColor = colorComboBox1.Color;
}
private void button4_Click(object sender, EventArgs e)
{
colorComboBox1.Color = Color.Red;
}using System.Drawing;
using System.Reflection;
namespace System.Windows.Forms
{
public class ColorComboBox : ComboBox
{
public ColorComboBox()
{
comboBox1 = this;
//
// comboBox1
//
comboBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
comboBox1.DropDownHeight = 400;
comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
comboBox1.DropDownWidth = 200;
comboBox1.MaxDropDownItems = 20;
comboBox1.Size = new System.Drawing.Size(134, 24);
comboBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(comboBox1_DrawItem);
comboBox1.SelectedIndexChanged += new System.EventHandler(comboBox1_SelectedIndexChanged);
}
//public Color Color = Color.Black;
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboBox1.SelectedItem.ToString()!="")
__color = Color.FromName(comboBox1.SelectedItem.ToString());
}
public Color Color
{
get
{
return __color;
}
set
{
comboBox1.SelectedIndex = comboBox1.Items.IndexOf(value.Name.ToString());
}
}
public void Initialize()
{
Type type1 = typeof(System.Drawing.Color);
PropertyInfo[] propertyInfo1 = type1.GetProperties(BindingFlags.Static | BindingFlags.DeclaredOnly | BindingFlags.Public);
foreach (PropertyInfo color in propertyInfo1)
{
comboBox1.Items.Add(color.Name);
}
comboBox1.SelectedIndex = 8;
}
private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
{
if (e.Index >= 0)
{
string s = String.Format(" {0}", comboBox1.Items[e.Index]);
Font font = new Font("Arial", 9);
Color color = Color.FromName(s.Trim());
Brush brush = new SolidBrush(color);
Rectangle rect = new Rectangle(
e.Bounds.X + 4,
e.Bounds.Y + 2,
40,
e.Bounds.Height - 6
);
e.DrawBackground();
e.Graphics.DrawString(s, font, Brushes.Black, rect.X, rect.Top);
e.Graphics.FillRectangle(brush, rect);
e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1), rect);
//e.DrawFocusRectangle();
}
}
private System.Windows.Forms.ComboBox comboBox1;
//最好使用颜色的名字 如 Color. 总之是有名字的颜色
private Color __color = Color.Black;
}
}