关于DropDownList的怪事

Question

我一个页面，只有一个dropdownlist和一个label
label即时显示dropdownlist的被选项内容；
但是碰到一个怪问题，就是我只要选取ddl的最后两个选项，也就是Hyperion或者4AD，那么label的显示总是显示Archiv那个选项，也就是倒数第三个，我调试了之后发现selectedindexchanged事件触发后，传递的index值就是5，也就是说只要选第6或者第7个选项，传递的index值总是5，但是选择5之前的选项都没关系。
这真是出鬼了啊！！求高手帮我看看到底问题出在哪儿！Thx....aspx就没什么看的了，就一个ddl一个label，cs文件如下：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class Chapter4_DropDownList : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string[,] Label ={
                {"ECM","Germany"},
                {"EMI","France"},
                {"Vigin","France"},
                {"DG","German"},
                {"CMI","Sweden"},
                {"Archiv","UK"},
                {"Hyperion","UK"},
                {"4AD","UK"}
                };
            for (int i = 0; i < Label.GetLength(0); i++)
            {
                ddlLabel.Items.Add(new ListItem(Label[i,0],Label[i,1]));
            }
                lblRecord.Text = "Label Name:" + ddlLabel.SelectedItem.Text + "    Country: " + ddlLabel.SelectedValue;
        }        
    }    protected void ddlLabel_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (ddlLabel.SelectedIndex != -1)
        {
           lblRecord.Text = "Label Name:" + ddlLabel.SelectedItem.Text + "    Country: " + ddlLabel.SelectedValue;
           
        }
    }
}

Answer 1

你把{"Archiv","UK"},{"Hyperion","UK"},{"4AD","UK"}改成{"Archiv","UK1"},{"Hyperion","UK2"},{"4AD","UK3"}试下

Answer 2

Select value 重复了
{"Archiv","UK1"},
                {"Hyperion","UK2"},
                {"4AD","UK3"}
 {"EMI","France1"},
                {"Vigin","France2"},

Answer 3

dropdownlist.Selectedvalue 重复，都是"UK"{"Archiv","UK"},{"Hyperion","UK"},{"4AD","UK"}

Answer 4

把{"Archiv","UK"},{"Hyperion","UK"},{"4AD","UK"}改成{"Archiv","UK1"},{"Hyperion","UK2"},{"4AD","UK3"}
  或者把ddlLabel.Items.Add(new ListItem(Label[i,0],Label[i,1])); 改为
  ddlLabel.Items.Add(new ListItem(Label[i,1],Label[i,0]));

Answer 5

谢谢大家，改了之后就好了dropdownlist的value是不可以重复的吗？那如果从某个datasource读取的话value有重复那程序是不是就会出错呢...很奇怪为什么ddl的value不能重复....