Problem changing text of custom control based on text of another custom control

[pdickson]

Hi - I am using custom textboxes and I need to be able to set the Text on txb1 based on the Text of txb2. I have simplied my code to the following:

    Public Class customtextbox
        Inherits TextBox
        Public Event ControlReset()
        Public Sub New(ByVal strP As String)
            MyBase.New()
            AddHandler customtextbox.ControlReset, AddressOf Me.test
        End Sub
        Public Sub test()
            Me.Text = "chips" + Me.Name
        End Sub
        Public Sub ProcessAlert()
            RaiseEvent ControlReset()
        End Sub
        Private Sub customtextbox_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.LostFocus
            Dim cT As Control
            Dim cS As customtextbox
            If Me.Name = "txb1" Then
                If Me.Text = "fried" Then
                    For Each cT In frmTest.Controls
                        If cT.Name = "txb2" Then
                            cS = cT
                            Call cS.ProcessAlert()
                        End If
                    Next
                End If
            End If
        End Sub
    End Class
 

and the form code is:

Public Class frmTest
    Public Sub New()
        InitializeComponent()
        Dim txb1 As customtextbox
        Dim txb2 As customtextbox
        txb1 = New customtextbox("params for txb1")
        txb1.Name = "txb1"
        txb1.Location = New Point(10, 10)
        txb1.Size = New Point(200, 20)
        Me.Controls.Add(txb1)
        txb2 = New customtextbox("params for txb2")
        txb2.Name = "txb2"
        txb2.Location = New Point(10, 30)
        txb2.Size = New Point(200, 20)
        Me.Controls.Add(txb2)
    End Sub
End Class
 

So, when txb1 looses focus, if its Text is "fried", then it sets off txb2's ProcessAlert function. I had tried to change the value of txb2 Text in ProcessAlert function, but didnt work, so I tried to get it to raise an event instead, which then tries to set the Text property. However I still cant set txb2's Text property. The Text property seems to be set for the duration of the "life" of the Event handler. When I step through the forms controls within the Event handler, the changed Text value is there, but not outside of the Event handler.

Any suggestions???
Many thanks

[tlhintoq]

I'm a C# guy, not a VB guy, so someone correct me if I am wrong here...

            Dim cS As customtextbox
            If Me.Name = "txb1" Then
                If Me.Text = "fried" Then
                    For Each cT In frmTest.Controls
                        If cT.Name = "txb2" Then
                            cS = cT
                            Call cS.ProcessAlert()
 

The event is being fired in the newly created cS textbox not in located cT textbox. I suspect there is no reason for the cS control at all and could be simplified as

If Me.Name = "txb1" Then
                If Me.Text = "fried" Then
                    For Each cT In frmTest.Controls
                        If cT.Name = "txb2" Then
                            Call cT.ProcessAlert()

Of course since this is a custom control we have no idea what .ProcessAlert() does, so if the problem resides there....

[pdickson]

Thanks for the reply. I had to use the cS as the ProcessAlert() is a sub within the custom control, and thus not available from a standard control type. The ProcessAlert just raised an event on another custom control that changes its text.

I have changed my coding and taken most of the subs out of the custom control and put them in the form that creates them (there was a lot more code, this was just a simple example I created to try and solve the problem), and also passed the form to the custom controls, so the custom controls have direct access to the subs. Now that I am calling the subs from the form rather than the custom controls, it seems to work OK.

Cheers