Can't get my array to work

[tshad]

I have Web Service that I am accessing that has as part of it's definition a
couple of objects (employees and employee). Employees has 4 properties -
one being an array of "employee" objects.

********************************************
Public Class Employees
Public AuthGUID As String
Public TransactionID As String
Public NoofEmployees As Integer

Public ArrEmployee() As Employee

End Class

Public Class Employee
Public ExternalGUID As String
Public Action As String
Public EmployeeID As String
Public SupervisorName As String
Public CardNumber As String
End Class
************************************************** **********

I have set in my code:

Dim FTSEmployees As Employees = New Employees
Dim FTSEmployee As Employee = New Employee

I can do:
FTSEmployee.ArrEmployee(0).CardNumber = "1234"

and I can do:
FTSEmployee.EmployeeID = newHire.EmployeeNumber
FTSEmployee.SupervisorName = newHire.Officer
FTSEmployee.CardNumber = "1234 "

But I can't do:
FTSEmployees.ArrEmployee(0) = FTSEmployee

I get the error:
System.NullReferenceException: Object reference not set to an instance of an
object.

Line 130: FTSEmployees.ArrEmployee(0) = FTSEmployee

What is cause this? Obviously FTSEmployee.ArrEmployee(0) is an object as I
can do the above line and FTSEmployee is an employee as I am setting all the
properties before I do this line.

What is the error for?

Thanks,

Tom

[jvb]

I can do:

FTSEmployee.ArrEmployee(0).CardNumber = "1234"

You should not be able to so this since ArrEmployee is not a member of
class Employee.

and I can do:
FTSEmployee.EmployeeID = newHire.EmployeeNumber
FTSEmployee.SupervisorName = newHire.Officer
FTSEmployee.CardNumber = "1234 "

You can do this because you are setting the properties of an instance
of the Employee class which you have already created.

But I can't do:
FTSEmployees.ArrEmployee(0) = FTSEmployee

You cannot do this because you have not initialized the ArrEmployee.
You may want to try to implement IList and ICollection, it contains
methods and properties used commonly in collections. If you want to
keep it simple, add an employee to the array using an Add method (in
which you ReDim Preserve the array to the new length) and / or declare
ArrEmployee as an ArrayList variable and use the methods on the
ArrayList class

Hope this helps!

On Jan 25, 11:43 am, "tshad" <[e-mail]:

I have Web Service that I am accessing that has as part of it's definition a
couple of objects (employees and employee). Employees has 4 properties -
one being an array of "employee" objects.

********************************************
Public Class Employees
Public AuthGUID As String
Public TransactionID As String
Public NoofEmployees As Integer

Public ArrEmployee() As Employee

End Class

Public Class Employee
Public ExternalGUID As String
Public Action As String
Public EmployeeID As String
Public SupervisorName As String
Public CardNumber As String
End Class
************************************************** **********

I have set in my code:

Dim FTSEmployees As Employees = New Employees
Dim FTSEmployee As Employee = New Employee

I can do:
FTSEmployee.ArrEmployee(0).CardNumber = "1234"

and I can do:
FTSEmployee.EmployeeID = newHire.EmployeeNumber
FTSEmployee.SupervisorName = newHire.Officer
FTSEmployee.CardNumber = "1234 "

But I can't do:
FTSEmployees.ArrEmployee(0) = FTSEmployee

I get the error:
System.NullReferenceException: Object reference not set to an instance of an
object.

Line 130: FTSEmployees.ArrEmployee(0) = FTSEmployee

What is cause this? Obviously FTSEmployee.ArrEmployee(0) is an object as I
can do the above line and FTSEmployee is an employee as I am setting all the
properties before I do this line.

What is the error for?

Thanks,

Tom

[Armin Zingler]

"tshad" <[e-mail]

I have Web Service that I am accessing that has as part of it's
definition a couple of objects (employees and employee). Employees
has 4 properties - one being an array of "employee" objects.

********************************************
Public Class Employees
Public AuthGUID As String
Public TransactionID As String
Public NoofEmployees As Integer

Public ArrEmployee() As Employee

End Class

Public Class Employee
Public ExternalGUID As String
Public Action As String
Public EmployeeID As String
Public SupervisorName As String
Public CardNumber As String
End Class
************************************************** **********

I have set in my code:

Dim FTSEmployees As Employees = New Employees
Dim FTSEmployee As Employee = New Employee

I can do:
FTSEmployee.ArrEmployee(0).CardNumber = "1234"

Doesn't the line above start with FTSEmployees, not FTSEmployee?

I don't think it can work.

and I can do:
FTSEmployee.EmployeeID = newHire.EmployeeNumber
FTSEmployee.SupervisorName = newHire.Officer
FTSEmployee.CardNumber = "1234 "

But I can't do:
FTSEmployees.ArrEmployee(0) = FTSEmployee

I get the error:
System.NullReferenceException: Object reference not set to an
instance of an object.

Line 130: FTSEmployees.ArrEmployee(0) = FTSEmployee

What is cause this?

Obviously FTSEmployee.ArrEmployee(0) is an
object as I can do the above line and FTSEmployee is an employee as
I am setting all the properties before I do this line.

What is the error for?

You didn't create an array to store the employees:

Redim FTSEmployees.ArrEmployee(4)
Armin