关于继承combobox写颜色下拉框 怎么写，给个思路！

Question

关于继承combobox写颜色下拉框  怎么写，给个思路！

Answer 1

我只见过 JS+<select > 的例子
用在 聊天室.选择颜色的例子上有
C# 的却没有

Answer 2

或者说在dataGridView中，怎么能让一列是颜色下拉框啊！

Answer 3

Public Class Form1    Private Sub FillListBoxWithColors()
        Me.ComboBox1.DrawMode = DrawMode.OwnerDrawFixed
        Me.ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList
        Me.ComboBox1.ItemHeight = 15
        Me.ComboBox1.BeginUpdate()
        ComboBox1.Items.Clear()
        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
        ComboBox1.EndUpdate()
    End Sub    Private Sub ComboBox1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles ComboBox1.DrawItem
        If e.Index < 0 Then Exit Sub        Dim rect As Rectangle = e.Bounds '每一项的边框
        '绘制项假如被选中则显示高亮显示背景, 否则用白色
        If e.State And DrawItemState.Selected Then
            e.Graphics.FillRectangle(SystemBrushes.Highlight, rect)
        Else
            e.Graphics.FillRectangle(SystemBrushes.Window, rect)
        End If        Dim ColorName As String = ComboBox1.Items(e.Index)
        Dim b As New SolidBrush(Color.FromName(ColorName))
        rect.Inflate(-2, -2)                '缩小选定项区域()
        e.Graphics.FillRectangle(b, rect)   '填充颜色(文字对应的颜色)
        e.Graphics.DrawRectangle(Pens.Black, rect)  '绘制边框()
        Dim b2 As Brush
        '确定显示的文字的颜色()
        If CInt(b.Color.R) + CInt(b.Color.G) + CInt(b.Color.B) > 128 * 3 Then
            b2 = Brushes.Black
        Else
            b2 = Brushes.White
        End If
        e.Graphics.DrawString(ColorName, Me.ComboBox1.Font, b2, rect.X, rect.Y)
    End Sub    Private Sub form1_load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        FillListBoxWithColors()
    End Sub
End Class

Answer 4

谢谢楼上的！
有没有C#代码啊，VB的我看不太懂！

Answer 5

public class Form1 
{ 
    
    private void FillListBoxWithColors() 
    { 
        this.ComboBox1.DrawMode = DrawMode.OwnerDrawFixed; 
        this.ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList; 
        this.ComboBox1.ItemHeight = 15; 
        this.ComboBox1.BeginUpdate(); 
        ComboBox1.Items.Clear(); 
        Reflection.PropertyInfo pi; 
        foreach ( pi in typeof(Color).GetProperties(Reflection.BindingFlags.Public | Reflection.BindingFlags.Static)) { 
            this.ComboBox1.Items.Add(pi.Name); 
        } 
        ComboBox1.EndUpdate(); 
    } 
    
    private void ComboBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) 
    { 
        if (e.Index < 0) 
            return; // TODO: might not be correct. Was : Exit Sub         
        Rectangle rect = e.Bounds; 
        //每一项的边框 
        //绘制项假如被选中则显示高亮显示背景, 否则用白色 
        if (e.State & DrawItemState.Selected) { 
            e.Graphics.FillRectangle(SystemBrushes.Highlight, rect); 
        } 
        else { 
            e.Graphics.FillRectangle(SystemBrushes.Window, rect); 
        } 
        
        string ColorName = ComboBox1.Items(e.Index); 
        SolidBrush b = new SolidBrush(Color.FromName(ColorName)); 
        rect.Inflate(-2, -2); 
        //缩小选定项区域() 
        e.Graphics.FillRectangle(b, rect); 
        //填充颜色(文字对应的颜色) 
        e.Graphics.DrawRectangle(Pens.Black, rect); 
        //绘制边框() 
        Brush b2; 
        //确定显示的文字的颜色() 
        if ((int)b.Color.R + (int)b.Color.G + (int)b.Color.B > 128 * 3) { 
            b2 = Brushes.Black; 
        } 
        else { 
            b2 = Brushes.White; 
        } 
        e.Graphics.DrawString(ColorName, this.ComboBox1.Font, b2, rect.X, rect.Y); 
    } 
    
    private void form1_load(object sender, System.EventArgs e) 
    { 
        FillListBoxWithColors(); 
    } 
    
    
}