Ninject singleton scope loading

Question

I am very much new to ASP.NET MVC and I need help loading some types in singleton scope using Ninject.

--- existing code looks as ----

List<Type> types = loading some types into list here.

foreach (var type in types.Where(O => O.Name.StartsWith("I")))
{
    Kernel.Bind(type).To(Type.GetType(type.FullName.Replace(".I", ".")));
}

My job is to bind these types in singleton scope and I am not sure how to do that.

score 3 · Accepted Answer · answered Apr 22 '13 at 10:24

3

After kernel.Bind().To() put .InSingletonScope()

answered Apr 22 '13 at 10:24

Trevor Pilley

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this line is inside foreach loop.. does it makes any issue like leaving multiple copies ?? – mmssaann Apr 22 '13 at 10:31
I'm not sure I understand what you mean by "leaving multiple copies"? The `InSingletonScope()` informs Ninject that for the specified binding, a single instance should be created upon its first resolution and that same instance should be used every time the type is requested. – Trevor Pilley Apr 22 '13 at 10:48

score 3 · Answer 2 · answered Apr 22 '13 at 11:15

Also have a look at the Ninject conventions extension. It makes stuff like this a lot easier. For example you could write it like this instead.

kernel.Bind(x =>
x.FromThisAssembly()
.SelectAllClasses()
.Where(types.Contains)
.BindDefaultInterface()
.Configure(b => b.InSingletonScope()));

Depending on how you get your list of types, this might be written even easier. Just check out the documentation and the samples on the wiki.

https://github.com/ninject/ninject.extensions.conventions/wiki

Ninject singleton scope loading

2 Answers2