How to write an event handler to automatically detect new activesync connections.

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Hi. I have a windows form program that updates info when an existing activesync connection is active.

I'd like to write an event handler that will automatically update the form when a new Mobile 6.5 device is cradled.

Does anyone have a complete example of this?

All the code snippets found with Google don't work for me.

Thanks in advance.

Let me extend the question.

What I've done so far is put these lines in the form's CTOR

C#

m_rapi.RAPIConnected += new RAPIConnectedHandler(m_rapi_RAPIConnected);

            m_rapi.RAPIDisconnected += new RAPIConnectedHandler(m_rapi_RAPIDisconnected);

            m_rapi.Connect(false, -1);

Then I have:

C#

private void m_rapi_RAPIConnected()
        {

            MessageBox.Show("Connected");
            Dostuff();

        }



        private void m_rapi_RAPIDisconnected()
        {
            MessageBox.Show("Disconnected");
            clearForm();

        }

When I start the program and the Mobile device is already connected, I get the messagebox but nothing else happens.

I fixed that by changing

m_rapi.Connect(false, -1);

to

m_rapi.Connect(true, -1);

The stuff in dostuff() now executes.

However, when I disconnect the device, the messagebox pops up, but the clearform() does nothing.

Also, when I reconnect the device, the connect method doesn't execute, which I assume is because it's in the CTOR.

Any ideas how to fix both problems?

Posted 21-Oct-14 18:32pm

Spidy1

Updated 22-Oct-14 13:16pm

v2

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Comments

BillWoodruff 22-Oct-14 0:48am

Is there a physical connection between the mobile device and the Win computer ?

George Jonsson 22-Oct-14 0:52am

Divide your problem into smaller pieces and then search for a solution for each bit.
In the same fashion you eat an elephant.

Sinisa Hajnal 22-Oct-14 2:19am

What snippets? Show us what you did before, that way you will not get as solution something you already tried.

Spidy1 22-Oct-14 22:49pm

Just to clarify, the clearform() method is meant to clear the form on the PC, not the form on the mobile device.

Spidy1 22-Oct-14 23:07pm

Further comment, I think I have a cross threading problem.

George Jonsson 23-Oct-14 1:36am

You say clearform() does nothing. Well, is the method called and what kind of code do you have inside.
If you set a breakpoint and step into clearform() what happens?

Spidy1 23-Oct-14 17:59pm

It's called from the RAPIDisconnect method as in the code above and has txtIP.clear() etc. And yes the break point reaches the first line and then the program continues. When I type txtIP.Text into the immediate window I get a crossthreadexception.

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Spidy1 · Answer 1 · 2014-10-23T13:24:00

I solved the crossthreadmessagingexception by using a delegate.

XML

private void m_rapi_RAPIDisconnected()
         {
             Invoke((new updateFormDelegate(updateForm)));
         }



        
         private delegate void updateFormDelegate();



        
         void updateForm()
         {
             txtIPAddress.Clear();
             ...

         }

So now, I can detect a connection and disconnection when the form first loads.

But after an initial connection the disconnection, when I reconnect, it's not detected.

How can I automatically capture subsequent connections/disconnections?

Any suggestions would be greatly appreciated.