Accessing objects between forms - C#, CF, WM 2003 SE

[Guest]

I'm writing an application where I have incoming data via TCP into a Static
global routine. From that routine, I'm wanting to display the error message
on a form.

Now I have tried many variations of getting access to the object ( a message
label), but basically, as soon as it tries to assign the message label.text,
the program just stops in that code.

I'm using VS 2003 - C# - Writing for WM 2003 SE

1. I'm calling this from Public Static routine in a different namespace.
2. FSignon is the name of the form.
3. FSignon_int is a public reference to the form:
public static FSignon FSignon_int;
4. The form is displaying.
5. I'm then trying to assign the message label as follows:

public static void ipInMsg(string mytext);

FSignon.FSignon_int.MsgLabel.Text=mytext;
(debugging ends on this line)

So, how is one normally suppose to be able to assign or change values of
objects on other forms? I was thinking about window messaging .. but not
sure on the impact with CF or some Invoke statement?

Just needs some direction here.

Thanks
John

 

[Chris Tacke, eMVP]

If the event is coming in on a separate thread (not clear from your post)
then you must use Invoke to access any UI element.

-Chris

 

[Guest]

I believe I am dealing with a basic mis-understanding of getting access to
objects from different classes.

1. I do have a separate thread (an event) that is taking inbound data.
2. I am parsing that data and I want to put that information into a Label
object on potentially two different forms.

So, here is the path I have:

1. Data comes in via an event in a class named 'Globals'.
2. In a "STATIC METHOD" - the event, I then decide which form should
receive the information.
3. I am then attempting to call that form's label to put the message I
received so the user can see it. (In this case, it could be either the form
named "FMain" in class "main" or in a form named "FSignon" in the class
"signon".

Now, how is this supposed to work from a static event? I've tried creating
a reference to the form's form by doing a:
===
public class FSignon: System.Windows.Forms.Form
{
public static FSignon FSignon_int;

(I saw this in another posting).
=====
But, when I tried to do this, the application stops processing:
FSignon.FSignon_int.msglabel.text="Error";

=================================
And, I also tried doing an invoke...but how are you to invoke an object
outside the class?

Thanks
John