FineUI/FineUI.Examples/dropdownlist/dropdownlist_emptyvalue.aspx.cs

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

namespace FineUI.Examples.dropdownlist
{
    public partial class dropdownlist_emptyvalue : PageBase
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {

            }
        }

        protected void btnSelectItem6_Click(object sender, EventArgs e)
        {
            DropDownList1.SelectedValue = "";
        }

        protected void btnGetSelection_Click(object sender, EventArgs e)
        {
            Result();
        }

        private void Result()
        {
            if (DropDownList1.SelectedItem != null)
            {
                labResult.Text = String.Format("选中项：{0}（值：{1}）", DropDownList1.SelectedItem.Text, DropDownList1.SelectedValue);
            }
        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (DropDownList1.SelectedItem != null)
            {
                labResult.Text = String.Format("选中项：{0}（值：{1}）", DropDownList1.SelectedItem.Text, DropDownList1.SelectedValue);
            }
        }
    }
}