c# - How to get values from a list<class> -

i have these classes, want use login, check if email , password same, redirect respective page.

public class account   {     public account(){}     public int accid { get; set; }     public string emailaddress { get; set; }     public string password { get; set; }     public string name { get; set; }     public string company { get; set; }     public string position { get; set; }     public string department { get; set; }     public string mobileno { get; set; }     public string officeno { get; set; }    }  public static sadatareader doselectquery(string sql)     {         saconnection myconnection = new saconnection(db_str);         //open connection          myconnection.open();         //create command object.          sacommand mycommand = myconnection.createcommand();          //specify query.          mycommand.commandtext = sql;          //create datareader command          sadatareader reader = mycommand.executereader();          return reader;     }  public static list<account> getallaccountfromreader(sadatareader reader){         list<account> results = new list<account>();          while (reader.read())         {             int accid = reader.getint32(0);             string emailaddress = reader.getstring(1);             string password = reader.getstring(2);             string name = reader.getstring(3);             string company = reader.getstring(4);             string position = reader.getstring(5);             string department = reader.getstring(6);             string mobileno = reader.getstring(7);             string officeno = reader.getstring(8);               account accounts = new account();             accounts.accid = accid;             accounts.emailaddress = emailaddress;             accounts.password = password;             accounts.name = name;             accounts.company = company;             accounts.position = position;             accounts.department = department;             accounts.mobileno = mobileno;             accounts.officeno = officeno;             results.add(accounts);         }         return results;     }  public static list<account> getallaccounts()     {         //specify query.          string sql = "select accountid,emailaddress,password,name,company,position,department,mobileno,officeno account";          sadatareader reader = doselectquery(sql);         list<account> results = getallaccountfromreader(reader);         return results;   } 

.cs file check fields

protected void btnsubmit_click(object sender, eventargs e)     {         string email = tbemail.text;         string password = tbpw.text;         list<account> getaccounts = minutedb.getallaccounts();         // session["getallaccount"] = getaccounts;        if(email ==?? && password == ??)             {                         //session["name"] = name.tostring();                        //session["id"] = convert.toint32(accid.tostring());                       response.redirect("homepage.aspx");             }              else if (email == "" && password == "")             {                 scriptmanager.registerstartupscript(this, gettype(), "error", "alert('please enter login , password!');", true);             }             else             {                 scriptmanager.registerstartupscript(this, gettype(), "error", "alert('wrong login or password!');", true);             }      } 

how retrieve email , password list getaccounts can check if (email == email list account && password == password list account) ??

try linq/extension methods.

var account = minutedb.getallaccounts()                .where(p=> p.emailaddress==email && p.password==password)                .firstordefault();   if(account!=null) {   session["id"]=account.accid;   session["name"]=account.name;   response.redirect("~/other_page.aspx"); } 

write following code in other_page.aspx read session key-value.

int id=0; string name=""; if(session["id"]!=null)    id=int.parse(session["id"].tostring()); if(session["name"]!=null)    name=session["name"]; 

ps: not store password in list<t>. may assign account object reference session.

e.g

 if(account!=null)     {       session["account"]=account;       response.redirect("~/other_page.aspx");     } 

and retrieve account value session:

account account=session["account"] account; if(account!=null)  {    //read property value of account  }