//returns "MODEL.User" object if successful/found
//returns "null" if not
internal User findUserByUserName(string userName)
{
int result = (int)CODE.MINUS_ONE;
User user = null;
//validate userName
if (
result == (int)CODE.ZERO ||
string.IsNullOrWhiteSpace(userName) ||
!Validate.isAlphaNumericWithUnderscore(userName) ||
!Validate.hasMinLength(userName, 5) ||
!Validate.hasMaxLength(userName, 15)
)
{
result = (int)CODE.ZERO;
}
if (result != (int)CODE.ZERO)//safe to proceed
{
IUsers _DbUsers = new DbUsers();
try
{
using (var trScope = TransactionScopeBuilder.CreateSerializable())
{
user = _DbUsers.findUserByUserName(userName);
trScope.Complete();
}
}
catch (TransactionAbortedException taEx)
{
result = (int)CODE.ZERO;
Log.Add(taEx.ToString());
}
catch (ApplicationException aEx)
{
result = (int)CODE.ZERO;
Log.Add(aEx.ToString());
}
catch (Exception ex)
{
result = (int)CODE.ZERO;
Log.Add(ex.ToString());
}
}
else
{
result = (int)CODE.ZERO;
}
if (result == (int)CODE.ZERO || user == null)
{
return(null);
}
else
{
return(user);
}
}