C# - Help with LINQ

Posted by cmaduro on Stack Overflow See other posts from Stack Overflow or by cmaduro
Published on 2010-05-21T01:07:20Z Indexed on 2010/05/21 1:10 UTC
Read the original article Hit count: 444

Filed under:
|
|

I need to check if a certain property exists within a class. Please refer to the LINQ query in question. For the life of me I cannot make the compiler happy.

class Program
{
    static void Main(string[] args)
    {
        ModuleManager m = new ModuleManager();
        IModule module = m.FindModuleForView(typeof(HomeView));
        Console.WriteLine(module.GetType().ToString());
        Console.ReadLine();
    }
}

public class ModuleManager
{
    [ImportMany]
    public IEnumerable<Lazy<IModule>> Modules { get; set; }

    [ImportMany]
    public IEnumerable<Lazy<View>> Views { get; set; }

    public ModuleManager()
    {
        //An aggregate catalog that combines multiple catalogs
        var catalog = new AggregateCatalog();
        //Adds all the parts found in the same assembly as the Program class
        catalog.Catalogs.Add(new AssemblyCatalog(typeof(Program).Assembly));
        //Create the CompositionContainer with the parts in the catalog
        _container = new CompositionContainer(catalog);
        //Fill the imports of this object
        try
        {
            this._container.ComposeParts(this);
        }
        catch (CompositionException compositionException)
        {
            Console.WriteLine(compositionException.ToString());
        }
    }

    public IModule FindModuleForView(Type view)
    {
        //THIS IS THE PROBLEM
        var module = from m in Modules
                     where (
                        from p in m.Value.GetType().GetProperties()
                        where p.GetType().Equals(view)
                        select p
                     )
                     select m;

    }
    public CompositionContainer _container { get; set; }
}

public interface IModule
{
}

[Export]
public class HomeModule : IModule
{
    public HomeModule()
    {
    }

    [Export]
    public HomeView MyHomeView
    {
        get
        {
            return new HomeView();
        }
        set
        {
        }
    }
}


public class HomeView : View
{
}

public class View
{
}

© Stack Overflow or respective owner

Related posts about c#

Related posts about LINQ