-2
當我嘗試在asp.net頁面中運行此代碼時,出現此錯誤「對象未設置爲對象的實例」錯誤試圖來回列表讀出的數據的在消息框中顯示它們時c#列表不返回值「對象引用未設置爲對象的實例」
using System;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Generic;
public partial class Applications_Establishment_Test2 : System.Web.UI.Page
{
public class MYLIST
{
public string S_NUM;
public string NAME_E;
public string Dir;
public MYLIST(string s_num, string name_e, string dir)
{
s_num = S_NUM;
name_e = NAME_E;
dir = Dir;
}
}
public List<MYLIST> GetLista(string Snum)
{
List<MYLIST> UserInfo = new List<MYLIST>();
UserInfo.Add(new MYLIST(Snum, "John", "HR"));
return UserInfo;
}
protected void Page_Load(object sender, EventArgs e)
{
List<MYLIST> UserInfo = GetLista("AB1234");
MessageBox.Show(UserInfo[0].S_NUM.ToString());
}
}
錯誤觸發
MessageBox.Show(的UserInfo [0] .S_NUM.ToString());
誰能幫助請
非常感謝 – 2015-02-24 16:17:47