/// <summary>
/// This function will call the method of the global service that will get a reference and
/// call a method of the local one.
/// </summary>
private void GetLocalUsingGlobalCallback(object sender, EventArgs args)
{
// Get a reference to the global service.
IMyGlobalService service = GetService(typeof(SMyGlobalService)) as IMyGlobalService;
if (null == service)
{
// The previous call failed, but we expected it to succeed.
// Write a message on the debug output and exit.
Debug.WriteLine("Can not get the global service.");
return;
}
// Now call the method that will cause the call in the local service.
service.CallLocalService();
}
public void GetGlobalServiceSimple()
{
ServicesPackage packageObject = new ServicesPackage();
IVsPackage package = (IVsPackage)packageObject;
using (OleServiceProvider provider = OleServiceProvider.CreateOleServiceProviderWithBasicServices())
{
int result = package.SetSite(provider);
Assert.IsTrue(Microsoft.VisualStudio.ErrorHandler.Succeeded(result), "SetSite failed.");
IServiceProvider serviceProvider = package as IServiceProvider;
object o = serviceProvider.GetService(typeof(SMyGlobalService));
Assert.IsNotNull(o, "GetService returned null for the global service.");
IMyGlobalService service = o as IMyGlobalService;
Assert.IsNotNull(service, "The service SMyGlobalService does not implements IMyGlobalService.");
service.GlobalServiceFunction();
}
package.SetSite(null);
package.Close();
}
/// <summary>
/// This function is the event handler for the command defined by this package and is the
/// consumer of the service exposed by the ServicesPackage package.
/// </summary>
private void GetGlobalServiceCallback(object sender, EventArgs args)
{
// Get the service exposed by the other package. This the expected sequence of queries:
// GetService will query the service provider implemented by the base class of this
// package for SMyGlobalService; this service will be not found (it is not exposed by this
// package), so the base class will forward the request to the service provider used during
// SetSite; this is the global service provider and it will find the service because
// ServicesPackage has proffered it using the proffer service.
IMyGlobalService service = GetService(typeof(SMyGlobalService)) as IMyGlobalService;
if (null == service)
{
// If the service is not available we can exit now.
Debug.WriteLine("Can not get the global service.");
return;
}
// Call the function exposed by the global service. This function will write a message
// on the output window and on the debug output so that it will be possible to verify
// that it executed.
service.GlobalServiceFunction();
}
