在C#中控制ListBox某一行的字体颜色

更新时间：2022-09-15 14:04:46

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);
    }     
}