Need a refresher course on property access...
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by Code Sherpa
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Published on 2010-05-26T16:46:38Z
Indexed on
2010/05/26
16:51 UTC
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c#
|properties
Hi.
I need help with accessing class properties within a given class.
For example, take the below class:
public partial class Account
{
private Profile _profile;
private Email _email;
private HostInfo _hostInfo;
public Profile Profile
{
get { return _profile; }
set { _profile = value; }
}
public Email Email
{
get { return _email; }
set { _email = value; }
}
public HostInfo HostInfo
{
get { return _hostInfo; }
set { _hostInfo = value; }
}
In the class "Account" exists a bunch of class properties such as Email or Profile. Now, when I want to access those properties at run-time, I do something like this (for Email):
_accountRepository = ObjectFactory.GetInstance<IAccountRepository>();
string username = Cryptography.Decrypt(_webContext.UserNameToVerify, "verify");
Account account = _accountRepository.GetAccountByUserName(username);
if(account != null)
{
account.Email.IsConfirmed = true;
But, I get "Object reference not set..." for account.Email... Why is that? How do I access Account such that account.Email, account.Profile, and so on returns the correct data for a given AccountId or UserName.
Here is a method that returns Account:
public Account GetAccountByUserName(string userName)
{
Account account = null;
using (MyDataContext dc = _conn.GetContext())
{
try
{
account = (from a in dc.Accounts
where a.UserName == userName
select a).FirstOrDefault();
}
catch
{
//oops
}
}
return account;
}
The above works but when I try:
account = (from a in dc.Accounts
join em in dc.Emails on a.AccountId equals em.AccountId
join p in dc.Profiles on em.AccountId equals p.AccountId
where a.UserName == userName
select a).FirstOrDefault();
I am still getting object reference exceptions for my Email and Profile
properties. Is this simply a SQL problem or is there something else I need to be
doing to be able to fully access all the properties within my Account class?
Thanks!
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