Constructor chaining and static property parameter and StructureMap

I would like my constructor to call another constructor with parameter but when I do this(MyProperty), then MyProperty must be static. And the problem is in the getter of this static Property, I have to get an instance of ISettingReader from structuremap Container and as it is static, my container contains only two elements instead of more than 50 element开发者_StackOverflow社区s, then it can't find the instance. (Error of pluginFamily on ISettingReader)

Here's my code.

    private static Func<LinqDataContext> _contextFactory;
    public static Func<LinqDataContext> DefaultContextFactory
    {
        get
        {
            var settingReader = ObjectFactory.GetInstance<ISettingReader>(); // I get an error saying it can't find ISettingReader()
            var connectionString = settingReader.GetSetting("MyProject.ConnectionString");
            _contextFactory = () => new LinqDataContext(connectionString);
            return _contextFactory;
        }
    }

    public MyProjectViewModelService() : this(DefaultContextFactory)
    {

    }

    public MyProjectViewModelService(Func<LinqDataContext> contextFactory)
    {
        _contextFactory = contextFactory;
    }

I think if I can get rid of my static keyword, it should work. And I confirm I have initialized my ISettingReader in structureMap container when I started my application in Program.exe

So what should I do ? Thanks !

John

PS: there's similar problem I found on stackoverflow, but he doesn't use structureMap: Constructor chaining with intermediate variables

Why don't you move the code from your getter to the default constructor and put the ISettingReader as a dependency in the constructor. When you request a new MyProjectViewModelService Structuremap will automatically resolve the ISettingReader and supply the instantiated default type for that dependency.

So if you would have
public MyProjectViewModelService(ISettingReader settingReader)
{
var connectionString = settingReader.GetSetting("MyProject.ConnectionString");
_contextFactory = () => new LinqDataContext(connectionString);
}

You can remove the rest.

The exception you get from structuremap is because you didn't configure any default instance for ISettingReader