高分求解??????

Question

public SqlConnection conn;
//用户属性
public string companyname
{
get {return companyname;}
set {companyname=value;}
}
public string username
{
get{return companyname;}
set{username=value;}
}
public string password
{
get{return password;}
set{password=value;}
}
public int companytype
{
get{return companytype;}
set{companytype=value;}
}
public int zhuying
{
get{return zhuying;}
set{zhuying=value;}
}
public string fuzeren
{
get{return fuzeren;}
set{fuzeren=value;}
}
public string email
{
get{return email;}
set{email=value;}
}
public string tel
{
get{return tel;}
set{tel=value;}
}
public string fax
{
get{return fax;}
set{fax=value;}
}
public string address
{
get{return address;}
set{address=value;}
}
public int loginnum
{
get{return loginnum;}
set{loginnum=value;}
}
public System.DateTime lastlogin
{
get{return lastlogin;}
set{lastlogin=value;}
}
public void getuserinfo(int userid)
{
SqlCommand cmd=new SqlCommand("Select * from company where id="+userid.ToString(),conn);
SqlDataReader dr=cmd.ExecuteReader();
while(dr.Read())
{
this.username=dr["username"].ToString();
this.password=dr["password"].ToString();
this.address=dr["address"].ToString();
this.companyname=dr["companyname"].ToString();
this.companytype=(int)dr["companytype"];
this.email=dr["email"].ToString();
this.fax=dr["fax"].ToString();
this.fuzeren=dr["fuzeren"].ToString();
this.lastlogin=(DateTime)dr["lastlogin"];
this.loginnum=(int)dr["loginnum"];
this.zhuying=(int)dr["zhuying"];
}
dr.Close();
}
上面一个为类
下面引用
private void Page_Load(object sender, System.EventArgs e)
{
u1=new user();
if(!Page.IsPostBack)
{
string sql="Select * from company";
u1.getuserinfo(1);
Label1.Text=u1.companyname;
}
// 在此处放置用户代码以初始化页面
}
发生类型为 System.StackOverflowException 的异常。 

Answer 1

堆栈溢出,你这个类设计不合理
你user类写在哪了,构造函数呢

Answer 2

namespace jxc
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class user
{
public SqlConnection conn;
//用户属性
public string companyname
{
get {return companyname;}
set {companyname=value;}
}
public string username
{
get{return companyname;}
set{username=value;}
}
public string password
{
get{return password;}
set{password=value;}
}
public int companytype
{
get{return companytype;}
set{companytype=value;}
}
public int zhuying
{
get{return zhuying;}
set{zhuying=value;}
}
public string fuzeren
{
get{return fuzeren;}
set{fuzeren=value;}
}
public string email
{
get{return email;}
set{email=value;}
}
public string tel
{
get{return tel;}
set{tel=value;}
}
public string fax
{
get{return fax;}
set{fax=value;}
}
public string address
{
get{return address;}
set{address=value;}
}
public int loginnum
{
get{return loginnum;}
set{loginnum=value;}
}
public System.DateTime lastlogin
{
get{return lastlogin;}
set{lastlogin=value;}
}
public user()
{
conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["connstring"]);
conn.Open();
//
// TODO: 在此处添加构造函数逻辑
//
}
public SqlConnection reconn()
{
conn.Open();
return conn;
} //Sql语句邦定到DataGrid控件
public void bindgrid(string sql,DataGrid gd)
{
//SqlCommand cmd=new SqlCommand(sql,conn);
SqlDataAdapter da=new SqlDataAdapter(sql,conn);
DataSet ds=new DataSet();
da.Fill(ds);
gd.DataSource=ds.Tables[0].DefaultView;
gd.DataBind();
}
//取用户相关信息，并返回DataReader对象
public SqlDataReader getuserinfo(string sql)
{
SqlCommand cmd=new SqlCommand(sql,conn);
SqlDataReader dr=cmd.ExecuteReader();
return dr;
}
//取某一用户信息
public void getuserinfo(int userid)
{
SqlCommand cmd=new SqlCommand("Select * from company where id="+userid.ToString(),conn);
SqlDataReader dr=cmd.ExecuteReader();
while(dr.Read())
{
this.username=dr["username"].ToString();
this.password=dr["password"].ToString();
this.address=dr["address"].ToString();
this.companyname=dr["companyname"].ToString();
this.companytype=(int)dr["companytype"];
this.email=dr["email"].ToString();
this.fax=dr["fax"].ToString();
this.fuzeren=dr["fuzeren"].ToString();
this.lastlogin=(DateTime)dr["lastlogin"];
this.loginnum=(int)dr["loginnum"];
this.zhuying=(int)dr["zhuying"];
}
dr.Close();
}
}
}
namespace jxc
{
/// <summary>
/// user1 的摘要说明。
/// </summary>
public class user1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.Label Label1;
protected user u1;
private void Page_Load(object sender, System.EventArgs e)
{
u1=new user();
if(!Page.IsPostBack)
{
string sql="Select * from company";
u1.getuserinfo(1);
Label1.Text=u1.companyname;
}
// 在此处放置用户代码以初始化页面
}

Answer 3

SqlCommand cmd=new SqlCommand("Select * from company where id="+userid.ToString(),conn);
有问题吧.

Answer 4

public string email //属性和变量重名
{
get{return email;}//这里
set{email=value;}//这里 造成无出口递归 ， }

Answer 5

userid.ToString()你的数据库ID是什么类型的？？