DropDownList中“请选择”变色_dropdownlist 颜色 delphi-优快云博客

后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;

namespace yhx
{
    public partial class ddl : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Add_Choose();
            }
        }

        /// <summary>
        /// Add choose for DropDownList
        /// And font color to red
        /// </summary>
        protected void Add_Choose()
        {
            ddl_yhx_choose.Items.Insert(0, new ListItem("请选择....", "0"));
            ddl_yhx_choose.SelectedItem.Attributes.Add("style", "color:red");
        }
    }
}

前台：