关于 "UserControl" 和 "Session" 的问题,应该很简单,但我不会,高分!!!!50分奉送~
一.我的自定义用户登陆控件user.ascx:

<%@   Control   Language= "C# "   AutoEventWireup= "true "   Inherits= "come "   CodeFile= "bin/public.cs "%>
....... <%   Response.Write(Session[ "username "]);   %> .....


二.我的public.cs:

.......
public   partial   class   come   :   System.Web.UI.UserControl
......
Session[ "username "]   =   dr[ "name "].ToString();


三.我的index.aspx:

<form   id= "form1 "   runat= "server "> <mycontrol:come   runat= "server "   /> </form>


现在关键问题是:Session[ "username "]并没有被生成,我Response.Write(Session[ "username "])也为空,请问是什么原因?我该如何做?谢谢,50分表心意~

------解决方案--------------------
这样看看
if (!mydr.HasRows)
{
mydr.Close();
conn.Close();
Response.Redirect( "111.aspx ");
}
else
{
if(mydr.Read())
{
Session[ "username "] = mydr[ "identity "].ToString();
Session[ "password "] = mydr[ "thekey "].ToString();
Session[ "userclass "] = mydr[ "class "].ToString();
string sqlip;
sqlip = "insert into ipaddress ([identity],[ipaddress],[logintime]) values ( ' " + useroftextbox + " ', ' " + Request.ServerVariables[ "REMOTE_ADDR "] + " ', ' " + DateTime.Now + " ') ";
OleDbCommand commip = new OleDbCommand(sqlip,conn);
commip.ExecuteNonQuery();
}
mydr.Close();
conn.Close();
}


不过DataReader是独占连接的，你在做查询的时候未必能插入记录成功
------解决方案--------------------
Response.Write(Session[ "username "])
session取出的是object，Response.Write传入的应该是string