Visual Basic

19-Sep-04 14:24

Another question to make (and so soon). How can i make a label on another form (lets say Form1) to change from a Form2. In vb6 we used to say Form1.lblTest.caption = "Test"

in VB.NET how is it possible???

So far i have:
==============================
Dim frmRead As New Form2
Form2.Show
==============================

In Form2 when i click a button i want to change a label text in form1.

=====================================================================
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
form1.lblTest.Text = txtTestBox.text
=====================================================================
the above command produces an error.
Any help? Please?
Eek! | :eek:

Trying to find the way

Colin Angus Mackay19-Sep-04 14:58

Colin Angus Mackay

19-Sep-04 14:58

V_A_S_S wrote:
the above command produces an error

Any particular error?

Do you want to know more?

Not getting the response you want from a question asked in an online forum: How to Ask Questions the Smart Way!

Nick Seng19-Sep-04 15:16

Nick Seng

19-Sep-04 15:16

V_A_S_S wrote:
Dim frmRead As New Form2
Form2.Show

First of all, I hope that's a typo, cause it should be:

frmRead.Show

You have to set the access modifier for lblTest to either Public or Friend to be able to access it from another form.

"if you vote me down, I shall become more powerful than you can possibly imagine" - Michael P. Butler.

V_A_S_S19-Sep-04 15:22

19-Sep-04 15:22

Yes it was a typo. A messaage comes up saying:
"Reference to a non-shared member requires an object reference"

The modifier of the text box in form1 is Friend.

ARGG!! Why VB.NET is so crapy???!!?!

if i type form1.lblTest.text = "Test" then there is a blue wiggly line under it.

Trying to find the way

Nick Seng19-Sep-04 15:27

Nick Seng

19-Sep-04 15:27

what's the name of your form1? is it really form1?
Unlike vb6, VB.Net does not automatically create a variable for a form, you have to manually create it.

Try setting the text without referencing the form.

lblTest.text = "Test"

See if that works

"if you vote me down, I shall become more powerful than you can possibly imagine" - Michael P. Butler.

V_A_S_S19-Sep-04 15:42

19-Sep-04 15:42

No still doesn't work.... yes i keep my forms form1, form2 etc for now. I am new in VB.NET.

Thanks for all the help though.

Trying to find the way

Nick Seng19-Sep-04 16:12

Nick Seng

19-Sep-04 16:12

Hmmm, that's strange.

Are you sure that there's a line:

Friend WithEvents lblTest as Label

in your form1?

"if you vote me down, I shall become more powerful than you can possibly imagine" - Michael P. Butler.

V_A_S_S19-Sep-04 16:29

19-Sep-04 16:29

I found a article with the follwing code:

Public Class Form1
Inherits System.Windows.Forms.Form
Dim F2 As New Form2

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ShowButton.Click
F2.ShowDialog(Me) ' Show Form2
Me.UserLabel.Text = "Current User : " & Form2.NuNameTB.Text

End Sub

======================================================================

Public Class Form2
Inherits System.Windows.Forms.Form
Public Shared NuNameTB As TextBox

Private Sub CloseButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CloseButton.Click
' Assign this form's TextBox to the Object Variable
NuNameTB = UsersName
' Now close the form
Me.Close()
End Sub
================================================================

it seems to be working ok. Thank you for all the support Nick and Colin. VB.NET is a bit annoying sometimes. Now if i could get help about the paper size collection. Wink | ;)

Thanks again.

Trying to find the way

Dave Kreskowiak20-Sep-04 5:16

Dave Kreskowiak

20-Sep-04 5:16

Actually, it's not a problem with VB.NET. You would have the exact same problem with C# too.

This is beause your not following proper OOP coding practices to get what you want done.

Try reading Working with Multiple Forms in Visual Basic .NET: Upgrading to .NET[^] on MSDN for a better explanation of moving data between forms.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Paper size collection

V_A_S_S19-Sep-04 12:49

19-Sep-04 12:49

I have a problem with enumerating a list box with the available papers sizes of a printer. I want to be able when i click on the printer combobox the listbox to be able to fill with the available paper sizes. So far it seems that it's able to find only the default paper sizes.

I have post this question again earlier on but it was lost in all the new entries. I am really lost of what to do . Any help will be much appriciated. Thank you in advance...

Here is the code so far. cmbPrinter = combobox of available printers.
lstPaper = listbox of available paper sizes.

============================================================================

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim objPrint As New System.Drawing.Printing.PrinterSettings

Dim strItem As String
Dim strPrinters As String
For Each strItem In objPrint.InstalledPrinters
cmbPrinter.Items.Add(strPrinters & strItem)
Next

End Sub

Private Sub cmbPrinter_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbPrinter.SelectedIndexChanged
' Add list of supported paper sizes found on the printer.
Dim searchstring As String
Dim SearchChar As String
Dim MyPos As Integer
Dim i As Integer
Dim pkSize As System.Drawing.Printing.PaperSize = Nothing
SearchChar = "A4"

For Each pkSize In printDoc.PrinterSettings.PaperSizes
lstPaper.Items.Add(pkSize.PaperName)
Next

For i = 0 To lstPaper.Items.Count - 1
lstPaper.SelectedIndex = i
searchstring = lstPaper.SelectedItem()
MyPos = InStr(searchstring, SearchChar)
If MyPos = 0 Then
lstPaper.Items.Remove(0)
Else
paperToUse = searchstring
End If
Next

updateDisplay()
End Sub

I can fill the combobox of the printers and the list box of the papers. BUT when i click on another printer the program DOSEN'T give me the list of the paper sizes on the new selected printer. It's like it stucks in the paper sizes of the default printer...
HEEEEEEEEEEEEEEEEEEEEEEEEEELP!!!

Trying to find the way

Get emails from account

umarinam19-Sep-04 12:10

umarinam

19-Sep-04 12:10

Hi all,

I want to build an application that can get emails from my yahoo, hotmail and gmail accounts and display them formatted in a text box. Please guide me where to start for this project i can do the second part but have no idea how to start working on the first part as how the application will login at hotmail or yahoo and how'll it get the emails.

Thanks in advance.

Regards,
Umar Inam

UI

Christian Graus19-Sep-04 12:35

Christian Graus

19-Sep-04 12:35

Do hotmail and yahoo expose their mail functionality to this sort of program ? I'd guess the best place to find out is hotmail and yahoo.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder

umarinam19-Sep-04 12:43

umarinam

19-Sep-04 12:43

I am not sure that they do. but there should be work arround as we can check the mails through browser. now just it has to communicate with my app or something like that any one please??

Regards,
Umar Inam

UI

Christian Graus19-Sep-04 12:46

Christian Graus

19-Sep-04 12:46

If they don't expose that functionality, then you need to control IE and get it to click on each new email, grab the text from it, and copy to your app. Sounds like a lot of work for little reward to me, and as soon as they change the pages, your app won't work anymore.

Christian

I have drunk the cool-aid and found it wan and bitter. - Chris Maunder