The default site created by the System.ComponentModel.Container class does not
pass service requests (IServiceProvider.GetService()) to its container unless
the requested service is of type ISite. That's just batty, because anyone trying
to get the site this way won't get it, and anyone trying to get any other
service from the container won't get it.
The offending code is in Container.cs:
105 if (typeof(ISite) != t) {
106 return null;
107 }
The fix is simple:
105 if (typeof(ISite) == t) {
106 return this;
107 }
I've also attached a test program so you can see the difference between the .NET
implementation and the Mono implementation of this class.
--Brian
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
namespace Test {
class MainClass {
public static void Main() {
TestContainer container = new TestContainer();
Console.WriteLine( "// Results should be not null" );
container.Add( new TestComponent() );
Console.ReadLine();
}
}
class TestService {
}
class TestContainer : Container {
ServiceContainer _services = new ServiceContainer();
public TestContainer() {
_services.AddService( typeof(TestService), new
TestService() );
}
protected override object GetService( Type serviceType ) {
return _services.GetService( serviceType );
}
}
class TestComponent : Component {
public override ISite Site {
get {
return base.Site;
}
set {
base.Site = value;
if( value != null ) {
Console.WriteLine( "ISite request
result is {0}",
(value.GetService(
typeof(ISite) ) == null) ? "null" : "not null" );
Console.WriteLine( "TestService request
result is {0}",
(value.GetService(
typeof(TestService) ) == null) ? "null" : "not null" );
}
}
}
}
}
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