Variable Value Passing to another Form, VB.NET - vb.net

Question

I do have Two Public Variables, each are from two different forms..
Form1.VB
Public UserNo As String
Form2.VB
Public MyUserNo As String
On my Form2.VB File, I assign value to the UserNo of Form1.VB
Form1.UserNo = MyUserNo
Whenever I access the Form1.VB, the Value of the MyUserNo got empty, What should I do? Both Forms are not closed.
I also tried to re-assign the value when I need to use it on the Form1.VB
UserNo = Form2.MyUserNo

Answer 1

First Correct is Syntax is:
Form1.VB
Public UserNo As String
Form2.VB
Public MyUserNo As String
In Form1
UserNo=Form2.MyUserNo
Second Thing:
First you should store some value in MyUserNo before storing it into UserNo.
That's why you are getting empty value.

Answer 2

Make the variable static/Shared and try again,it should work.

Answer 3

You can have more than one instance of a form, you know. Forms are objects, just like anything else. You need a variable in each form to hold a reference to the instance of each form that you are using.

Answer 4

If you don't call InitializeComponent(), your complete GUI is not going to render.
...
InitializeComponent()
Form1.UserNo = MyUserNo
...

Answer 5

Try this:
[Form1.UserNo = form2.MyUserNo]

Answer 6

it work
add it to form what you want value in next form
Function getvariable()
Return (VARIABLE)
End Function
In next form to get VARIABLE
VARIABLE2 = Form.getvariable()

Answer 7

Use variable value as Public
For Example
In Form1:
Public Str1 as String
So in Form2 you can use:
Str2=Form1.Str1

Answer 8

'In frmMain i Start frmBase
Dim f As New frmBase
f.Text = "New caption for frmBase"
f.ShowDialog(Me)
'in frmBase i read and write a textbox
Dim str As String = CType(Me.Owner, frmMain).txtRicetta.Text
Console.WriteLine(str)
CType(Me.Owner, frmMain).txtRicetta.Text = "12345"
Console.WriteLine(CType(Me.Owner, frmMain).txtRicetta.Text)

Answer 9

What you need to do is create your variables in a module as private, then generate some assessors for them.
Example:
Module modVariables
Private strUserNoSTR as String = New String(String.Empty)
Public Property getUserNoSTR() As String
Get
Return strUserNoSTR
End Get
Set(ByVal strUserNo As String)
strUserNoSTR = strUserNo
End Set
End Property
Private strMyUserNoSTR As String = New String(String.Empty)
Public Property getMyUserNoSTR As String
Get
Return strMyUserNoSTR
End Get
Set(ByVal strMyUserNo As String)
strMyUserNoSTR = strMyUserNo
End Set
End Property
End Module
After you generate the getter and setter public methods you can notice that your two private variables are within them, when you create the variables they are accessible from any form.
The reason why you keep losing the variables value is because when you try to access its value from another form (basically you're calling it from another class) the compiler has to create a new instance of that variable and when that happened the variable is set back to its original value which is of type empty string. Calling them from a module keeps them from being re-instantiated.
How To Use Them:
To get the value of strMyUserNo you call the getter of strMyUserNoSTR:
TextBox.Text = getMyUserNoSTR
To set the value of strMyUserNoSTR:
getMyUserNoSTR = someValuePlacedInThisVariable 'This sets it's value.
TextBox.Text = getMyUserNoSTR 'Now it's value is someValuePlacedInThisVariable.