How to get current data connectivity type (3G, Edge, Gprs) in Microsoft .NET Compact Framework?

I'm developing mobile apps using the Microsoft .NET 3.5开发者_C百科 Compact Framework.

I need to periodically check for what kind of data connectivity is up (3G, Edge, or Gprs).

Can I get this information via the .NET CF API?

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You can do this without periodically checking, the Microsoft.WindowsMobile.Status namespace allows you to subscribe to particular properties associated with the data connection of the device. By setting up a SystemState subscription you can assign events when the connection changes:

using Microsoft.WindowsMobile.Status;

    public void OnLoad()
    {
        var connectionState = new SystemState(SystemProperty.ConnectionsCellularCount);
        connectionState.Changed += (o, s) =>
            {
                if (SystemState.CellularSystemConnectedHsdpa)
                {
                    // show 3G Icon
                }
                else if (SystemState.CellularSystemConnectedGprs)
                {
                    // show GPRS Icon
                }
                else if (SystemState.CellularSystemConnectedEdge)
                {
                    // show Edge Icon
                }
            };
    }