ListBox中如何实现两行显示一个颜色，可能需要自己写一个类

[liwei84516]

如题，要实现两行显示一个颜色，怎么写这个类？ 最好能给个完整的事例，谢谢 谢谢啊！急

[liwei84516]

还是不会。没接触过c#

[阳光彩虹小白马嘀嘀哒嘀嘀嗒]

做过gridview的。。没做过listbox的。。

关注好了

[jym2003]

新手來學習~

[liwei84516]

我从来没学过c#，如果是c++，让我写一个继承类，很容易，但是c#的话，我不知道格式是什么样的？哪位大哥能不能发一个继承ListBox的模版给我，然后我自己再填充功能进去？最好能告诉我怎么调用这个新类！谢谢啊

[liwei84516]

问题没解决，我顶起

[zenowolf]

[Quote=引用 6 楼 h_w_king 的回复:]

this.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
Color bg;


else
{
if (e.Index % 2 == 0)
bg = Color.Red;
else
bg = Color.White;
}

…
[/Quote]
这个可以参考。。推荐下

[wzuomin]

Public Class MyListBox
    Inherits System.Windows.Forms.ListBox

    Public Sub New()
        Me.DrawMode = Windows.Forms.DrawMode.OwnerDrawVariable
    End Sub

    Private Sub MyListBox_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles Me.DrawItem
        If e.Index = -1 Then Exit Sub
        Dim txtFnt As Font = New Font(Me.Font.Name, Me.Font.Size)

        If e.State And System.Windows.Forms.DrawItemState.Selected Then
            txtFnt = New Font(Me.Font.Name, Me.Font.Size, FontStyle.Italic Or FontStyle.Bold)
        End If

        If e.Index Mod 4 = 0 Or e.Index Mod 4 = 1 Then
            e.Graphics.FillRectangle(Brushes.White, e.Bounds)
        Else
            e.Graphics.FillRectangle(Brushes.LightCyan, e.Bounds)
        End If

        Dim SF As New StringFormat : SF.LineAlignment = StringAlignment.Center
        e.Graphics.DrawString(" " + Items(e.Index).ToString, txtFnt, Brushes.Blue, e.Bounds, SF)
        e.DrawFocusRectangle()
    End Sub

    Private Sub MyListBox_MeasureItem(ByVal sender As Object, ByVal e As System.Windows.Forms.MeasureItemEventArgs) Handles Me.MeasureItem
        Dim itmSize As SizeF = e.Graphics.MeasureString(Items(e.Index).ToString, Me.Font, New Size(Me.Width, 400))
        e.ItemHeight = itmSize.Height * 2 : e.ItemWidth = itmSize.Width
    End Sub

End Class

以上代码在vb中可以实现lz的要求，转成c#代码后好像不正确，不知道怎么回事儿。

public class MyListBox : System.Windows.Forms.ListBox 
    { 
    
        public MyListBox() 
        { 
            this.DrawMode = DrawMode.OwnerDrawVariable; 
        } 
        
        private void  MyListBox_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) 
        { 
            if (e.Index == -1) return; 

            Font txtFnt = new Font(this.Font.Name, this.Font.Size);

            if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
            { 
                txtFnt = new Font(this.Font.Name, this.Font.Size, FontStyle.Italic | FontStyle.Bold); 
            } 
            
            if (e.Index % 4 == 0 | e.Index % 4 == 1) { 
                e.Graphics.FillRectangle(Brushes.White, e.Bounds); 
            } 
            else { 
                e.Graphics.FillRectangle(Brushes.LightCyan, e.Bounds); 
            } 
            
            StringFormat SF = new StringFormat(); 
            SF.LineAlignment = StringAlignment.Center; 
            e.Graphics.DrawString(" " + this.Items[e.Index].ToString(), txtFnt, Brushes.Blue, e.Bounds, SF); 
            e.DrawFocusRectangle(); 
        } 
        
        private void MyListBox_MeasureItem(object sender, System.Windows.Forms.MeasureItemEventArgs e) 
        { 
            SizeF itmSize = e.Graphics.MeasureString(this.Items[e.Index].ToString(), this.Font, new Size(this.Width, 400)); 
            e.ItemHeight =(int) itmSize.Height * 2; 
            e.ItemWidth = (int)itmSize.Width; 
        }     
    }

[wzuomin]

哦，明白啦，少写了一句，呵呵。
lz试试看吧，是不是这个效果

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = 0; i < 10;i++ )
            {
                this.myListBox1.Items.Add("item" + i.ToString ());
            }
        }
    }

    public class MyListBox : System.Windows.Forms.ListBox 
    { 
    
        public MyListBox() 
        { 
            this.DrawMode = DrawMode.OwnerDrawVariable;
            this.DrawItem += new DrawItemEventHandler(MyListBox_DrawItem);
        } 
        
        private void  MyListBox_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) 
        { 
            if (e.Index == -1) return; 

            Font txtFnt = new Font(this.Font.Name, this.Font.Size);

            if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
            { 
                txtFnt = new Font(this.Font.Name, this.Font.Size, FontStyle.Italic | FontStyle.Bold); 
            } 
            
            if (e.Index % 4 == 0 | e.Index % 4 == 1) { 
                e.Graphics.FillRectangle(Brushes.White, e.Bounds); 
            } 
            else { 
                e.Graphics.FillRectangle(Brushes.LightCyan, e.Bounds); 
            } 
            
            StringFormat SF = new StringFormat(); 
            SF.LineAlignment = StringAlignment.Center; 
            e.Graphics.DrawString(" " + this.Items[e.Index].ToString(), txtFnt, Brushes.Blue, e.Bounds, SF); 
            e.DrawFocusRectangle(); 
        }               
    } 

}

[feiyun0112]

http://www.codeproject.com/KB/combobox/colorlistbox.aspx

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[满衣兄]

楼上的可以.我接.

[qq904492758]

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[lovvver]

其实你也可以自己实现的，写一个control，继承自ListBox，然后在它的OnPaint的方法里，对每一行进行自定义的处理。

[麻子Mozart]

up

[h_w_king]

this.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
Color bg;


else
{
if (e.Index % 2 == 0)
bg = Color.Red;
else
bg = Color.White;
}

e.Graphics.FillRectangle(new SolidBrush(bg), e.Bounds);
if (e.State == DrawItemState.Selected)
e.Graphics.DrawString(this.listBox1.Items[e.Index].ToString(), e.Font, new SolidBrush(Color.White), e.Bounds);
else
e.Graphics.DrawString(this.listBox1.Items[e.Index].ToString(), e.Font, new SolidBrush(Color.Black), e.Bounds);

}

[outou]

[Quote=引用 1 楼 feiyun0112 的回复:]
http://www.codeproject.com/KB/combobox/colorlistbox.aspx

[/Quote]
方法不错，支持

[龙宜坡]

1楼的可以！