Injecting Dependency That Has Already Been Created With Ninject
I would like to know how to use Ninject to inject an object as a dependency where that object has already been created. I have the following code in my WPF Window_Loaded method in my main window:
IKernel kernel = new StandardKernel();
kernel.Bind<ITeleStore>().To<TeleStore>();
kernel.Bind<ITreeViewModel>().To<TreeViewModel>();
var tst = kernel.Get<TeleStore>();
// rootnode already exists and is obtained from the telestore component
开发者_如何学编程TstTreeNode rootNode = tst.GetRootNode();
// how do I use ninject to inject rootnode?
ITreeViewModel treeViewModel = new TreeViewModel(rootNode);
base.DataContext = treeViewModel;
You can pass the root node as argument to the request! Simple to the following
public interfacte ITreeViewModel
{
public TstTreeNode TestNode {get;}
........
// Other members
}
// Sample Class
public class TreeViewModel : ITreeViewModel
{
public TreeViewModel(TstTreeNode node) {
TestNode = node;
}
// Implemented from interface
public TstTreeNode TestNode {get; private set;}
}
// Your code
IKernel kernel = new StandardKernel();
kernel.Bind<ITeleStore>().To<TeleStore>();
kernel.Bind<ITreeViewModel>().To<TreeViewModel>();
var tst = kernel.Get<TeleStore>();
// rootnode already exists and is obtained from the telestore component
TstTreeNode rootNode = tst.GetRootNode();
// how do I use ninject to inject rootnode?
ITreeViewModel treeViewModel = kernel.Get<TreeViewModel>(new ConstructorArgument("node", rootNode));
Have fun!
You can try using property-injection to set the "TstTreeNode" value in TreeViewModel class. Following is a sample code :-
public interfacte ITreeViewModel
{
public TstTreeNode TestNode {get;set;}
........
// Other members
}
// Sample Class
public class TreeViewModel : ITreeViewModel
{
public TreeViewModel() {}
// Implemented from interface
public TstTreeNode TestNode {get;set;}
}
// Your code
IKernel kernel = new StandardKernel();
kernel.Bind<ITeleStore>().To<TeleStore>();
kernel.Bind<ITreeViewModel>().To<TreeViewModel>();
var tst = kernel.Get<TeleStore>();
// rootnode already exists and is obtained from the telestore component
TstTreeNode rootNode = tst.GetRootNode();
// how do I use ninject to inject rootnode?
ITreeViewModel treeViewModel = kernel.Get<TreeViewModel>();
// Property Injection
treeViewModel.TestNode = rootNode
base.DataContext = treeViewModel;
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