Hello there,

 I have encountered a compatibility problem with the 'AccessPointCollection' class (SDF 2.1). I refer to this topic:

Anonymous:

I have a seemingly curious behaviour when working with the OpenNETCF.Net - Classes on my (Asus myPal A696, with Windows Mobile 6 Classic) Pocket PC.
Curious because I have tried the same program code on several different devices (FS Pocket Loox, Dell Axim, hp Ipaq) where the following code works great on. Just on the Asus it is a problem.
The following code is used to add the names of the nearby accesspoints to the combobox 'cb_Netze':

        private void holeNetze()
        {
            AccessPointCollection APCollection;

            AdapterCollection adapterCollection;
            adapterCollection = Networking.GetAdapters();
            this.cb_Netze.Items.Clear();
            foreach (Adapter adapter in adapterCollection)
            {
                if (adapter.IsWireless)
                {
                    APCollection = adapter.NearbyAccessPoints;
                    foreach (AccessPoint AP in APCollection)
                    {
                        if(!cb_Netze.Items.Contains(AP.Name))
                        {
                            this.cb_Netze.Items.Add(AP.Name);
                        }
                    }
                }
            }
        }

When calling this method on my Asus device, the combobox rests empty. I have found out that 'adapter.NearbyAccessPoints' returns an empty AccessPointCollection, although the Wi-Fi-Manager of the Asus device shows about 6 nearby AccessPoints.
The curious thing about this is, that, when calling the same method twice close after one another, the correct names are displayed in the combobox, meaning that the method works in that case.
Just for 'fun', I tried what happens if you call the method thrice (?=three times) after one another... in that case, it also doesn't work.
When calling the method twice with a gap of more than about 1-2 seconds, it also doesn't work.

Huh? What can THAT be? ;-)
It's really important for me to get this method working on that Asus Pocket PC. It would be great if you could help me to solve this problem!

(http://community.opennetcf.com/forums/t/10175.aspx)

 
I have found out, that this seems to be a problem of devices with Windows Mobile 6 installed. The above mentioned sample works great on earlier Windows Mobile Versions. I have tried it on 2 different WM6-Devices (Asus myPal A696 and HP iPAQ 114), where this doesn't work.

It seems to me as if the AdapterCollection remains empty while it is updated. Unfortunately I don't know the inner structure of the OpenNetCF.Net-Library.

 It would be great if someone with a WM6-device could reproduce this and give me feedback to verify my suspect.

By the way, is there any other way to  access WLAN signal strength, apart from OpenNetCF?

 I've just come across the exact same problem as this except I'm actually using a WM5 device. I find if I execute AnAdapter.NearbyAccessPoints twice (one below the other in code) I can get a list of available access points, but this takes a long time if I were to do it this way (3 seconds or more).

 
Does anyone know of a work around to doing this? I had this working on an i-mate jasjam running WM5 but not on the device I'm using now which is an XDA Zinc running WM5.

 
I had a look around these forums and the googlenet to see if I could find a solution, but I can't seem to find much information regarding doing this since about 2005, ah!