c# - 如何更改列表框选择背景颜色？

Question

它似乎使用 Windows 设置中的默认颜色，默认情况下为蓝色。 假设我想将其永久更改为红色。我正在使用 Winforms。

提前致谢。

Answer 1

您必须覆盖 Drawitem事件并设置 DrawMode属性为DrawMode.OwnerDrawFixed

检查这个样本

private void listBox1_DrawItem(object sender, DrawItemEventArgs e)
{
    if (e.Index<0) return;
    //if the item state is selected them change the back color 
    if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
        e = new DrawItemEventArgs(e.Graphics, 
                                  e.Font, 
                                  e.Bounds, 
                                  e.Index,
                                  e.State ^ DrawItemState.Selected,
                                  e.ForeColor, 
                                  Color.Yellow);//Choose the color

    // Draw the background of the ListBox control for each item.
    e.DrawBackground();
    // Draw the current item text
    e.Graphics.DrawString(listBox1.Items[e.Index].ToString(),e.Font, Brushes.Black, e.Bounds, StringFormat.GenericDefault);
    // If the ListBox has focus, draw a focus rectangle around the selected item.
    e.DrawFocusRectangle();
}