Question

ListBox C# 每行的背景色

想给ListBox添加项背景色,变成一行背景白色,一行背景淡蓝色,怎么完成呢,谢谢~~

Answer 1

<asp:ListBox id="ListBox1" runat="server" SelectionMode="Multiple">
<asp:ListItem Value=".89" style="background-color:blue">apples</asp:ListItem>
<asp:ListItem Value=".49" style="background-color:silver">bananas</asp:ListItem>
<asp:ListItem Value="2.99" style="background-color:blue">cherries</asp:ListItem>
<asp:ListItem Value="1.49" style="background-color:silver">grapes</asp:ListItem>
<asp:ListItem Value="2.00" style="background-color:blue">mangos</asp:ListItem>
<asp:ListItem Value="1.09" style="background-color:silver">oranges</asp:ListItem>
</asp:ListBox>

Answer 2

private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
Brush br;

int r;
Math.DivRem(e.Index,2,out r);
if(r == 0)
br = Brushes.Red;
else
br = Brushes.Blue;
e.DrawBackground();
if((e.State & DrawItemState.Selected) == DrawItemState.Selected)
e.DrawFocusRectangle();

Brush b = Brushes.Black;
e.Graphics.FillRectangle(br,e.Bounds);
e.Graphics.DrawString(this.listBox1.Items[e.Index].ToString(),this.listBox1.Font,b,e.Bounds);

}