2个listbox的问题

Question

左边listbox数据通过2个按钮(添加,删除) 控制右边的listbox.代码如下,删除没有用,请大家看看
  protected void btn_ADD(object sender, EventArgs e)
    {
        if (this.ListBox_Source.SelectedIndex != -1)
        {
            int flag = 0;
            foreach ( ListItem i in ListBox_Target.Items)
            {
                if (this.ListBox_Source.SelectedItem.Value.ToString() == i.Text.ToString())
                    flag = 1;
               
            }
            if (flag == 0)
                this.ListBox_Target.Items.Add(this.ListBox_Source.SelectedItem.Value);
            else
            {
                Response.Write(string.Format("<script language=javascript>alert('快捷菜单已存在{0}');</script>", this.ListBox_Source.SelectedItem.Value));
            }
        }    }
    protected void btn_Remove(object sender, EventArgs e)
    {
        if (this.ListBox_Target.SelectedIndex > -1)
        {            this.ListBox_Target.Items.Remove(this.ListBox_Target.SelectedItem.Value);        }
        else
        {
            Response.Write("<script language=javascript>alert('没有可删除项！');</script>");
        }    }

Answer 1

try:
this.ListBox_Target.Items.Remove(this.ListBox_Target.SelectedItem);