Get .... EndGet

[Kalim Julia]

Anybody can explain me what is
1. Get ..... EndGet
2. Set ...... EndSet

Please send me any example.

 

[Michael D. Ober]

Look up the Property keyword.

Mike Ober.

 

[_AnonCoward]

: Anybody can explain me what is
: 1. Get ..... EndGet
: 2. Set ...... EndSet
:
: Please send me any example.


They relate to properties.


As an example, say you have a variable in your class that you want to
expose. Users are allowed full access to read the variable, but you don't
want users to give the variable a value greater than 100. If you make the
variable public, users can assign any value at all to it. By using a
property however, you can trap invalid values.


----------------------------------
Private mSomeVariable As Integer

Public Property SomeVariable() As Integer
Get
Return mSomeVariable
End Get

Set '(input parameter 'value' implied)
If value > 100 Then
Throw New Exception("value cannot exceed 100")
Else
mSomeVariable = value
End If
End Set
End Property
----------------------------------


Another use would be if you want to allow users to see the value of the
variable but do not want them to be able to change it. A 'read only'
property allows that.


----------------------------------
Private mSomeVariable

Public Readonly Property SomeVariable
Get
Return mSomeVariable
End Get
End Property

 

[Herfried K. Wagner [MVP]]

Anybody can explain me what is
1. Get ..... EndGet
2. Set ...... EndSet

Enter "Get keyword" in the documentation's index...

 

[Kalim Julia]

I've tried it in my program (set validation not exceed 100)
====================================
Private mlVARIABLE As Integer
Public Property _mlVARIABLE() As Integer
Get
Return mlVARIABLE
End Get
Set(ByVal Value As Integer)
If Value > 100 Then
Throw New Exception("tidak kurang dari 100")
Else
mlVARIABLE = Value
End If
End Set
End Property

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button2.Click
mlVARIABLE = 200
mSomeVariable = 153
End Sub
====================================
But when I assign mlVARIABLE = 200, it just goes through without any
validation message. Why ?

 

[Phill. W]

I've tried it in my program (set validation not exceed 100)
====================================
Private mlVARIABLE As Integer
Public Property _mlVARIABLE() As Integer
Get
Return mlVARIABLE
End Get
Set(ByVal Value As Integer)
If Value > 100 Then
Throw New Exception("tidak kurang dari 100")
Else
mlVARIABLE = Value
End If
End Set
End Property

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button2.Click
mlVARIABLE = 200
mSomeVariable = 153
End Sub
====================================
But when I assign mlVARIABLE = 200, it just goes through without any
validation message. Why ?

A prioperty is only any use if you actually make use ofit.
Your code is setting the Private member variable (mlVARIABLE)
directly, bypassing the Property completely. Use

Me._mlVARIABLE = 200

instead.

BTW, I think it is customary to have the /member/ variable with
the '_'-prefixed name, and the Property with just the simple name,
as in

Private _mlVARIABLE as Integer = 0

Public Property Variable() as Integer
.. . .

then

Me.Variable = 200

HTH,
Phill W.