Color Picker Combo Box

private void cboFontColor_DrawItem(object sender, DrawItemEventArgs e)
       {
           e.DrawBackground(); // this fixes an issue of mouseover changing to bold

           if (e.Index >= 0)
           {
               Graphics g = e.Graphics;
               Rectangle rect = e.Bounds;

               string colorName = ((ComboBox)sender).Items[e.Index].ToString();
               Font colorFont = new Font("Microsoft Sans Serif", 8);
               g.DrawString(colorName, colorFont, Brushes.Black, rect.X, rect.Top);

               Color rectColor = Color.FromName(colorName);
               Brush rectBrush = new SolidBrush(rectColor);
               g.FillRectangle(rectBrush, rect.X + 110, rect.Y + 1,
                               rect.Width - 10, rect.Height - 3);
           }
       }

Option Explicit On
Option Infer Off

Imports SD = System.Drawing
Imports SWF = System.Windows.Forms
Imports SR = System.Reflection

Public Class Form1

  Private Sub cmbboxClr_DrawItem(sender As Object, e As DrawItemEventArgs) Handles cmbboxClr.DrawItem
    Dim g As SD.Graphics = e.Graphics  'Graphics g = e.Graphics;
    Dim rect As SD.Rectangle = e.Bounds 'Rectangle rect = e.Bounds;

    Dim n As String
    Dim f As SD.Font
    Dim c As SD.Color
    Dim b As SD.Brush

    If e.Index >= 0 Then
      'n = CType(sender, SWF.ComboBox).Items(e.Index).ToString()
      n = CStr(CType(sender, SWF.ComboBox).Items(e.Index))
      f = New SD.Font("Arial", 9, FontStyle.Regular)
      c = SD.Color.FromName(n)
      b = New SD.SolidBrush(c)
      g.DrawString(n, f, Brushes.Black, rect.X, rect.Top)
      g.FillRectangle(b, rect.X + 110, rect.Y + 5, rect.Width - 10, rect.Height - 10)
    End If
  End Sub

  Private Sub btnLoad_Click(sender As Object, e As EventArgs) Handles btnLoad.Click
    Dim colorType As Type = GetType(SD.Color)
    Dim propInfoList() As SR.PropertyInfo = colorType.GetProperties( _
      SR.BindingFlags.Static Or SR.BindingFlags.DeclaredOnly Or SR.BindingFlags.Public)

    For Each c As SR.PropertyInfo In propInfoList
      cmbboxClr.Items.Add(c.Name)
    Next c

  End Sub:cool:

  Private Sub cmbboxClr_SelectedIndexChanged(sender As Object, e As EventArgs) Handles cmbboxClr.SelectedIndexChanged
    Dim color As String = CStr(cmbboxClr.SelectedItem)
    Panel1.BackColor = SD.Color.FromName(color)
  End Sub


End Class

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("\t{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;
    }
}

private void comboBox1_DrawItem(object sender, DrawItemEventArgs e)
      {
          e.DrawBackground();

          Rectangle rect = e.Bounds;
          if (e.Index >= 0)
          {
              string n = ((ComboBox)sender).Items[e.Index].ToString();

              Font font = new Font("Arial", 9, FontStyle.Regular);
              Color color = Color.FromName(n);
              Brush brush = new SolidBrush(color);

              e.Graphics.DrawString(n, font, Brushes.Black, rect.X, rect.Top);
              e.Graphics.FillRectangle(brush, rect.X + 110, rect.Y + 5, rect.Width - 10, rect.Height - 10);
          }
      }