添加到会话ASP.NET C＃中

Question

我想添加一个session [i']，其中更多结果

当前仅显示一组结果

例如。School1 11/10/2011 14/11/2011 GCSE AAA

我想添加更多集，但似乎没有存储在会话中

例如。

School111/11/2011 14/11/2011 GCSE AAA

school22012 11/10/2012 Alevels AAA

Education addResults = new Education(schoolName, fromDate, toDate , qualification , grades);
Session["i"] = (addResults );
//schoolarraylist.Add(addResults );
foreach (Education currentschool in schoolarraylist)
      {
         Session["i"] = currentschool.Schoollocation + "," + currentschool.Datefrom + "," + currentschool.Dateto + "," + currentschool.Qualifications + "," + currentschool.Grade + "<br />";
           string tmp = Session["i"].ToString();
           string[] sb = tmp.Split(',');
           string [] ii = new string[sb.GetUpperBound(0) + 1];
            for (int i = 0; i <= sb.GetUpperBound(0); i++)
                {
                    ib[i] = (sb[i]);
                }
            foreach (string j in ii)
                {
                    Response.Write(ii);
                }
            }

Answer 1

您可以将对象列表分配给session，然后将其恢复。But you should not put data in seesion without need。会话在每个用户的服务器端维护，并且将数据放入会话中需要存储服务器，并且可能会降低应用程序的性能。它值得阅读有关会话之前的阅读。

List<string> lst = new List<string>();
Session["i"] = lst;

从Session Object获取列表。

List<string> lst = (List<string>)Session["i"];

Answer 2

问题是，您将某些内容分配给session [" i"]，当您尝试在会话中添加某些内容时，您实际上覆盖了先前的值。为了在会话中添加对象，您要么必须选择另一个名称，例如session [" j"]或在对象周围包裹某种容器（列表，数组，字典等），然后将该容器存储在您的会话中。

还要尝试为会话找到更好的名称，如果您以后查看代码，您可能不会知道会话[" i"]实际上应该是。

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Answer 3

您也可以使用arraylist：

ArrayList list = new ArrayList();
foreach (Education currentschool in schoolarraylist)
{
    list.Add(currentschool.Schoollocation + "," + currentschool.Datefrom + "," + currentschool.Dateto + "," + currentschool.Qualifications + "," + currentschool.Grade)
}

然后循环浏览阵列列表，并以WhateCver格式显示您要显示