How different between these 2 methods of pass variable between form ?

Question

1. Created class then share varriable 

2. Just sent it directly to target form 

   Form2.text1.text = "TEST1"

How different between these 2

Answer 1

And what shohld be the best way to pass variable between form (reliable and fast)

Thx

Answer 2

<copied>

And what shohld be the best way to pass variable between form (reliable and fast)

<end>

Just pass the class/object as a parm on the form's constructor.

http://www.dreamincode.net/forums/topic/90845-passing-parameters-to-forms-while-creating-them/

Answer 3

Hi,

 darnold924 has given you a link that shows how you can pass a variable to the 2nd form when it is opened. Below is a small example of doing this. You can test it by creating a new Form project and then adding a new form "Form2" to it. Then drag a Button onto Form1 and a TextBox on Form2.

Form1 Code

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim txt As String = "Show this string in Form2 TextBox"

        Dim frm2 As New Form2(txt)
        frm2.Show()
    End Sub

End Class

Form2 Code

Public Class Form2

    Public Sub New(ByVal str As String)
        MyBase.New()
        InitializeComponent()
        TextBox1.Text = str
    End Sub

End Class

 

However, if you also want to be able to retrieve the text in the TextBox on Form2 from Form1 then you could add a Public Property to Form2 and retrieve the text from Form2`s TextBox when Form2 is closing. Here is an example of doing this. You can use the same setup of the two forms as described above.

Form1 Code

Public Class Form1
    Dim Frm2 As Form2

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Frm2 = New Form2
        AddHandler Frm2.FormClosing, AddressOf Frm2_Closing 'Add a handler so Form1 knows when Form2 is closing
        Frm2.TxtBoxText = "Show this string in Form2 TextBox"
        Frm2.ShowDialog()
    End Sub

    Private Sub Frm2_Closing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs)
        Me.Text = Frm2.TxtBoxText 'Set Form1`s title text to the text in Form2`s TextBox when Form2 is closing
    End Sub
End Class

Form2 Code

Public Class Form2

    Public Property TxtBoxText() As String
        Get
            Return TextBox1.Text
        End Get
        Set(ByVal value As String)
            TextBox1.Text = value
        End Set
    End Property

End Class