how to use constructors in windows form

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I have created a class named employee with its members id,name,salary.I have few questions in this whose answer i am not confident .Please check it
I have few questions and tell me the answers

Q 1 ) what will be its default constructor?
ans:

VB

Sub New()

   End Sub

Q 2 ) write an overloaded constructor that passes the employees name and salary?
ans:

VB

Sub New(ByVal name1 As String, ByVal salary1 As Decimal)

        name = name1
        salary = salary1
  End Sub

Q 3 ) write getter and setter method for salary

ans:

VB

Property salary1() As Decimal
        Get
            salary1 = salary
        End Get
        Set(ByVal value As Decimal)
            salary = value
        End Set
    End Property

Q 4 ) write a getter only for the id?

ans:

VB

ReadOnly Property id1() As Decimal
        Get

            id1 = id
        End Get

Q 5 ) create a list of employees.

i don't know its answer.

Q 6 ) add a new employee to the list using default constructor
i don't know its answer.

Q 7) Add a new employee to the list using overloaded constructor

ans:

VB

Private emp As Employee
emp = New Employee(txtid.Text, txtname.Text, txtsalary.Text)

txtid,txtname,txtsalary are textboxes on form

Q 8 ) write the code that would loop through employee list and output their salary

I don't know its answer

Q 9 ) what function should be called first if overloading a form's constructor?

I don't know its answer

please see to it and provide me relevant answers
thanx
regards

Posted 1-Dec-11 0:09am

shivani 2013

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Comments

Smithers-Jones 1-Dec-11 6:53am

Repost: http://www.codeproject.com/Questions/293070/how-to-add-employee-list-using-constructor
Reported.

Sergey Alexandrovich Kryukov 1-Dec-11 14:31pm

Hm. Four reports by now.
Nevertheless, I answered. Hope you will find my solution appropriate :-)
--SA

3 solutions

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nagendrathecoder · Answer 1 · 2011-12-01T00:41:00

Solution 1

Looks like interview question paper in which you failed miserably.
It would be better if you search google or read a book, you'll find all answers.

Posted 1-Dec-11 0:41am

nagendrathecoder

Comments

shivani 2013 1-Dec-11 6:49am

thanx

shivani 2013 1-Dec-11 6:56am

I am not getting answers thats why i came here
.it would be good if u help me for this

Sergey Alexandrovich Kryukov 1-Dec-11 14:30pm

I explained what can help you in my solution -- not answering these questions. You are not ready to understand those answers -- just yes. Please come back later when you are more ready, with more mature questions -- we well gladly help.

Sergey Alexandrovich Kryukov 1-Dec-11 14:29pm

I agree with you, my 5.
The problem is: OP needs systematic education (nearly from scratch), not answers to these questions -- it's just useless.

Please see my solution.
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2011-12-01T08:27:00

Interview question might help to reveal the level of understanding of the technology, to a limited extent. But considering interview question for learning anything is just a waste of time. You need real education, not interview training. And you apparently well behind. So, please do yourself a great favor: stop asking useless questions and learn some programming — pretty much from scratch. Nothing else can help you, except taking a different career root, of course.

—SA

**Manoj K Bhoir** · Answer 3 · 2011-12-01T03:13:00

Defualt Constructor :

VB

Sub New()
     'Your Code
End Sub

Overload Constructor :

VB

Sub New(ByVal Name As String, ByVal Salary As String)
    _Name = Name       '_Name is Private Variable
    _Salary = Salary   '_Salary is Private Variable
End Sub

Proerty :

VB

Public Property Salary() As Decimal
     Get
         Return _Salary   '_Salary is Private Variable
     End Get
     Set(ByVal value As Decimal)
         _Salary = value
     End Set
 End Property

ReadOnly Property :

VB

'We can only read the value of ReadOnly Property can not Set
   Public ReadOnly Property Id() As Decimal
        Get
              Return _ID '_Id is Private Variable
        End Get

Add New Employee :

VB

Dim Emp1 As Employee = New Employee 'It create new object of class employee

Add New Employee using Constructor Overloading :

VB

Dim Emp1 As Employee = New Employee("Employee1","10000") 'It create new object of class employee with two parameters

To add List of Employee :

VB

Dim EmployeeList As List(Of Employee)
EmployeeList.Add(Employee1)

To display every Employee in EmployeeList :

VB

For Each item In EmployeeList
  MessageBox.Show(item.ToString())
Next

Last question is wrong.While Form Loaded no function is called only it's constructor will be called or Form_Load gets called bt it is not a function.It's an Event :)

how to use constructors in windows form

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