C# 从aspx页面中的会话获取数据?
我有班豆, 然后我创建一些oboffbean并将它们添加到列表中,然后将列表转换为数组。 我将此数组添加到会话中,并在aspx页面中使用它,但无法从会话中获取数据C# 从aspx页面中的会话获取数据?,c#,asp.net,session,C#,Asp.net,Session,我有班豆, 然后我创建一些oboffbean并将它们添加到列表中,然后将列表转换为数组。 我将此数组添加到会话中,并在aspx页面中使用它,但无法从会话中获取数据 public Bean[] listAnswer() { SqlConnection con = new SqlConnection(@"Data Source=LEHUULOC-PC;Initial Catalog=WebThiTracNghiem;Integrated Security=True");
public Bean[] listAnswer()
{
SqlConnection con = new SqlConnection(@"Data Source=LEHUULOC-PC;Initial Catalog=WebThiTracNghiem;Integrated Security=True");
con.Open();
string sql = "SELECT * FROM tblCauhoi";
SqlCommand com = new SqlCommand(sql, con);
com.CommandType = CommandType.Text;
SqlDataReader dr = com.ExecuteReader();
List<Bean> Listbean = new List<Bean>();
Bean[] result = null;
while (dr.Read())
{
string macauhoi = (string)dr[0];
string cauhoi = (string)dr[1];
string cautraloi = (string)dr[2];
string traloidung = (string)dr[3];
//string dokho = (string)dr[4];
Bean answer = new Bean(macauhoi, cauhoi, cautraloi, traloidung, "");
Listbean.Add(answer);
result = new Bean[Listbean.Count];
result = Listbean.ToArray();
}
dr.Close();
con.Close();
return result;
}
======================================
Bean bean = new Bean();
Bean[] answer = bean.listAnswer();
Session.Add("ANSWER",(Bean[])answer);
<body>
<form id="form1" runat="server">
<div>
this is hocsinh page
<asp:Label ID="lblWelcome" runat="server"></asp:Label>
<%
foreach (var Bean in Session["ANSWER"])
{
}
%>
</div>
</form>
这是hocsinh页面
但我收到错误:foreach语句无法对“object”类型的变量进行操作,因为“object”不包含“GetEnumerator”的公共定义
<%
Bean[] list = (Bean[])Session["RESULT"];
if (list != null)
foreach (var Bean in list)
{
}
%>
Bean必须是可序列化的,并像这样将其放入会话中:
Session.Add("ANSWER",bean);
请这样读:
var beans = Session["Answer"] as Bean[];