怎么样实现"颜色下拉comboBox"?

Question

不知道有没有这样的控件。在网上找了一下只找到一篇VB.net实现的代码，可我对VB.net的语法又不太懂。大家能不能给出一个C#实现方法？顺便问一下，VB.net有个Reflection.PropertyInfo,不知道做什么用的?我在MSDN上都没找到,因为有这样一段代码:
Dim pi As Reflection.PropertyInfo
        For Each pi In GetType(Color).GetProperties(Reflection.BindingFlags.Public Or Reflection.BindingFlags.Static)
            Me.ComboBox1.Items.Add(pi.Name)
        Next

Answer 1

参看
http://www.syncfusion.com/FAQ/WindowsForms/FAQ_c88c.aspx#q547q

Answer 2

private Rectangle oldSelectedRect;
private int oldSelectedIndex = -1;
private void ComboBoxChange()
{
oldSelectedRect.X = -1;
oldSelectedRect.Y = -1;
oldSelectedRect.Width = 0;
oldSelectedRect.Height = 0; this.comboBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
this.comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
this.comboBox1.ItemHeight = 20;
comboBox1.Items.AddRange(new object[] { Color.Blue,
Color.Red,
Color.Green,
Color.Aqua,
Color.Pink,
Color.Lavender});

Location = new System.Drawing.Point(80, 100);
TabIndex = 1;
this.comboBox1.SelectedIndex = 2;
this.comboBox1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(DrawComboItem);
} public void DrawComboItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
if( oldSelectedRect != e.Bounds &&
oldSelectedIndex > -1 && oldSelectedIndex < comboBox1.Items.Count)
{
if(oldSelectedRect.Y != 3) //!=3 is hack to handle a drawing anomally
e.Graphics.DrawRectangle(new Pen((Color) comboBox1.Items[oldSelectedIndex], 1), oldSelectedRect);
} if( e.Index > -1 && e.Index < comboBox1.Items.Count)
e.Graphics.FillRectangle(new SolidBrush( (Color)comboBox1.Items[e.Index] ), e.Bounds);

if(comboBox1.SelectedIndex == e.Index)
{
e.Graphics.DrawRectangle(new Pen(Color.Black,1), e.Bounds);
oldSelectedRect = e.Bounds;
oldSelectedIndex = e.Index;
}
}

Answer 3

VB那个不是你想要的吧，那个refelection就是所谓的反射了，Color对象所有public和静态的属性名字都加到ComboBox1里面。

Answer 4

public void DrawComboItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
if( oldSelectedRect != e.Bounds &&
oldSelectedIndex > -1 && oldSelectedIndex < comboBox1.Items.Count)
{
if(oldSelectedRect.Y != 3) //!=3 is hack to handle a drawing anomally
e.Graphics.DrawRectangle(new Pen((Color) comboBox1.Items[oldSelectedIndex], 1), oldSelectedRect);
}
}===========================================================================为什么这里oldSelectedRect.Y != 3 ？是什么含义

Answer 5

CF1.0 环境下没有 System.Windows.Forms.DrawItemEventArgs