Visual Basic

Re: Adding Nodes to TreeView from FIles

14-Aug-05 14:25

What do you have trouble with, reading the file, or adding child nodes ?

Christian Graus - Microsoft MVP - C++

AyBee15-Aug-05 18:45

AyBee

15-Aug-05 18:45

Hi !!

The problem has been sorted out. It was rather simple than I thought it would be as VB has already provided the necessary procedures for adding nodes and I opened the file using the File System Object.

Any further suggestions are welcome.

Thank you

Bye

ENJOY !!

AyBee

How do I pass an Array/ArrayList to a WebService ...

MaWeRic10-Aug-05 19:45

Re: How do I pass an Array/ArrayList to a WebService ...

10-Aug-05 19:45

.... Have read about it but can't figure out the issue!

Declare WebFunction as "Save(MyNums as Array)"

Client sees MyNums as Object ... Tried a few converts.. The data in array/arraylist is just strings.

How is it done?

//Maw

Christian Graus10-Aug-05 20:46

Re: How do I pass an Array/ArrayList to a WebService ...

10-Aug-05 20:46

I thought web services only spoke XML ? So then a document that contains the string list would be the thing.

Christian Graus - Microsoft MVP - C++

MaWeRic10-Aug-05 21:44

Re: How do I pass an Array/ArrayList to a WebService ...

10-Aug-05 21:44

Soooo .... then how is it done? I have data in an array-list that I want to pass though a WebService and I want the webservice to convert data to array-list and go through it and do some magic with its data. Data is always strings.

//Maw

Christian Graus11-Aug-05 12:43

Re: How do I pass an Array/ArrayList to a WebService ...

11-Aug-05 12:43

The web service needs to expose a method that accepts this data. And the request will go as XML, the web service defines it's schema.

Christian Graus - Microsoft MVP - C++

MaWeRic11-Aug-05 19:34

Re: How do I pass an Array/ArrayList to a WebService ...

11-Aug-05 19:34

Yeah Yeah ...
Can you give me an example in code?

Regards // Maw

Christian Graus14-Aug-05 13:23

Re: How do I pass an Array/ArrayList to a WebService ...

14-Aug-05 13:23

Which bit are you stuck on ? Which bit do you know how to do ? What have you done ?

Christian Graus - Microsoft MVP - C++

MaWeRic14-Aug-05 14:02

Re: How do I pass an Array/ArrayList to a WebService ...

14-Aug-05 14:02

Welll .... have tried to pass array to webservice. Webservice is declared to take an array but wants an Object when lookin at Intellisense.

Just don't know how to do it.

Please help.... Just a simple string-array.

//Maw

Christian Graus14-Aug-05 14:24

14-Aug-05 14:24

MaWeRic wrote:
Please help.... Just a simple string-array.

What's missing in all of this is the fact that you have a *specific* web service, you're not writing one, and you've yet to post any code. What does the code in the web service proxy class look like for hte method ?

Christian Graus - Microsoft MVP - C++

Tab Pages

Anonymous10-Aug-05 19:42

10-Aug-05 19:42

Hi I am a newbie to VB.Net

Can anyone tell me how to disable certain tab pages from a tab control

Please help me out

Thanks in advance

MaWeRic10-Aug-05 19:47

10-Aug-05 19:47

To disable tab with index 1... myTab is my name of control

myTab.TabPages(1).Enabled = False

Good luck // Maw

Anonymous10-Aug-05 19:58

10-Aug-05 19:58

Thanks for the reply

But the problem is

Suppose i have 3 tab pages in tab control

1 and 3 are enabled is disabled i want the tabpage button to be disabled
the button which shows the tabpage
i don't want any click event on that tab page

Anonymous10-Aug-05 20:00

10-Aug-05 20:00

Thanks for the reply

But the problem is

Suppose i have 3 tab pages in tab control

1 and 3 are enabled 2 is disabled i want the tabpage button to be disabled
the button which shows the tabpage
i don't want any click event on that tab page

MaWeRic10-Aug-05 20:46

10-Aug-05 20:46

okay ... this is a messy problem.
Only thing I can say is to use an own function for it.

Bye the way ... is this your thread:
http://www.dotnetmonster.com/Uwe/Forum.aspx/winform/2103/BUG-Tab-page-control[^]

Maybe someone else has a soloution.

//Maw

Newbie help

Anonymous10-Aug-05 15:39

10-Aug-05 15:39

( Form 1 )
Dim frm2 As New form2

Public Sub ClearProject()
frm2.TextBox1.Visible = False
frm2.Hide()
End Sub

( Form 2 )
Dim frm1 As form1

Public Sub Button1_Click(Byval sender as System.Object,Byval e as EventArgs)Handles Button1.Click)
frm1.ClearProject()
End Sub

An unhandled exception of type 'System.NullReferenceException' has occurred
Addtional Information: Object reference not set to an instance of an object

Anyone knows why there is such an error?

Steve Pullan10-Aug-05 15:58

Steve Pullan

10-Aug-05 15:58

I presume you are trying to reference frm1 (as a form1 object) from the form 2 code yet you have neither created a new instance of the form via Dim frm1 as New form1 (an explicit Set frm1 = New form1 in the frm2 Load event would be better) nor passed a reference to it to the frm2 object.

The code sample you've provided also shows that you have a circular reference between the two forms. Not a good idea.

...Steve

Christian Graus10-Aug-05 16:04

10-Aug-05 16:04

Anonymous wrote:
Dim frm2 As New form2

I assume you're showing this modelessly ?

Anonymous wrote:
Dim frm1 As form1

This is a new instance of Form1, not the one that created form2. You should use delegates to do this sort of thing, or otherwise, you need to pass the instance of Form1 into Form2.

Christian Graus - Microsoft MVP - C++

Anonymous10-Aug-05 16:19

10-Aug-05 16:19

frm1 is my main form, and it will call frm2. I will get the error after i click the button that is in frm2. I tried (Dim frm1 As New form1) but it will only give another error.

Sorry but i still don't understand where the problem lies.. Confused | :confused:

Christian Graus10-Aug-05 16:21

10-Aug-05 16:21

Anonymous wrote:
I tried (Dim frm1 As New form1) but it will only give another error.

Of course, that's a NEW Form1. You need to pass the existing Form1 in as a function parameter, so it's the same one that holds the Form2 instance.

Christian Graus - Microsoft MVP - C++

Anonymous10-Aug-05 16:41

10-Aug-05 16:41

Erm..so how do I do that?

Christian Graus10-Aug-05 16:52

10-Aug-05 16:52

In Form2

private Form1 form1 = null'

private Form2(){} // Private constructor so it cannot be called
public Form2(Form1 parent)
{
form1 = parent
}

That's C# without ;, you need to convert it into VB. Then you create the instance of Form2 from Form1, passing in this ( is it Me in VB ? ). Or, the nicer way, is to set up delegates so that Form2 fires an event to Form1 to ask it to do whatever.

Christian Graus - Microsoft MVP - C++

Dave Kreskowiak10-Aug-05 17:38

Dave Kreskowiak

10-Aug-05 17:38

Form2 really shouldn't know about or be doing anything with Form1 in the first place. It's just not good OOP practice.

' Form2 code
Public Class Form2
    Public parentForm As Form
    Private Sub ......whatever......
        parentForm.whateverFunctionOrProperty
    End Sub
End Class

' Form1 code
Dim myNewForm As New Form2
myNewForm.parentForm = Me
myNewForm.Show()

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

Christian Graus10-Aug-05 17:51