在C#中控制ListBox某一行的字体颜色

例1

private void Form1_Load(object sender, EventArgs e)
{
listBox1.Items.Add("红色");
listBox1.Items.Add("黄色");
listBox1.Items.Add("蓝色");
listBox1.DrawMode = DrawMode.OwnerDrawFixed; // 属性里设置
}

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
Color vColor = e.ForeColor;
switch (e.Index)
{
case 0: vColor = Color.Red; break;
case 1: vColor = Color.Yellow; break;
case 2: vColor = Color.Blue; break;
}
e.Graphics.FillRectangle(new SolidBrush(vColor), e.Bounds);
e.Graphics.DrawString(((ListBox)sender).Items[e.Index].ToString(), e.Font,
new SolidBrush(e.ForeColor), e.Bounds);
e.DrawFocusRectangle();
}

例2 一种动态渲染颜色的方式

根据字符串的前缀，分别对文字颜色进行渲染。

// ListBox DrawItem事件响应函数
private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
if (e.Index >= 0)
{
e.DrawBackground();
Brush mybsh = Brushes.Black;
// 判断是什么类型的标签
if (listBox1.Items[e.Index].ToString().IndexOf("你好") != -1)
{
mybsh = Brushes.Green;
}
else if (listBox1.Items[e.Index].ToString().IndexOf("你坏") != -1)
{
mybsh = Brushes.Red;
}
// 焦点框
e.DrawFocusRectangle();
//文本
e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), e.Font, mybsh, e.Bounds, StringFormat.GenericDefault);
}
}

效果如下，当输入“你好”并按添加按钮的时候相应的ListBox的内容变为的绿色，输入“你坏”的时候变为了红色，达到了我们的要求目的：

class CListbox:ListBox
{

[System.Runtime.InteropServices.DllImport("user32.dll")]
static extern IntPtr GetWindowDC(IntPtr hWnd);
[System.Runtime.InteropServices.DllImport("user32.dll")]
static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

protected override void OnDrawItem(DrawItemEventArgs e)
{

Graphics g = e.Graphics;

if (e.Index % 2 == 0)
{

g.FillRectangle(new SolidBrush(Color.WhiteSmoke), e.Bounds);
g.DrawString(Items[e.Index].ToString(), e.Font, new SolidBrush(Color.Blue), e.Bounds);

}
else
{

g.FillRectangle(new SolidBrush(Color.WhiteSmoke), e.Bounds);
g.DrawString(Items[e.Index].ToString(), e.Font, new SolidBrush(Color.Red), e.Bounds);

}
e.DrawFocusRectangle();
g.Dispose();

base.OnDrawItem(e);
}

//捕获消息，画listbox边框
protected override void WndProc(ref Message m)
{
if (m.Msg == 0xf || m.Msg == 0x133)
{
IntPtr hDC = GetWindowDC(m.HWnd);
System.Drawing.Pen pen = new Pen(Color.YellowGreen, 1);
System.Drawing.Graphics g = Graphics.FromHdc(hDC);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
g.DrawRectangle(pen, 0, 0, this.Width - 1, this.Height - 1);
pen.Dispose();
g.Dispose();
ReleaseDC(m.HWnd, hDC);
}
base.WndProc(ref m);
}
}

// 应用如下：
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private CListbox mylistbox;

private void Form1_Load(object sender, EventArgs e)
{
mylistbox = new CListbox();
mylistbox.ItemHeight = 32;
mylistbox.DrawMode = DrawMode.OwnerDrawVariable;
mylistbox.Height = 150;
mylistbox.Width = 250;
mylistbox.Items.Add("第一行显示！");
mylistbox.Items.Add("第二行显示！");
mylistbox.Items.Add("第三行显示！");
mylistbox.Items.Add("第四行显示！");
mylistbox.Items.Add("第五行显示！");
mylistbox.Items.Add("第六行显示！");
mylistbox.Items.Add("第七行显示！");
mylistbox.Items.Add("第八行显示！");
mylistbox.Items.Add("第九行显示！");
mylistbox.Items.Add("第十行显示！");
mylistbox.Items.Add("第十一行显示！");
mylistbox.Items.Add("第十二行显示！");
this.Controls.Add(mylistbox);
}
}

View Code
效果如下：



参考文章

顺德早茶 , 在C#中控制ListBox某一行的字体颜色

C#中动态修改ListBox的Item的颜色的方法

gyzsky, listbox隔行显示不同颜色

例2 一种动态渲染颜色的方式