Question

我想知道如何使用Ninject将对象注入为已创建该对象的依赖项。我在主窗口的WPF Window_Loaded方法中有以下代码：

        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 = new TreeViewModel(rootNode);

        base.DataContext = treeViewModel;

Answer 1

您可以将根节点作为参数传递给请求！简单到以下

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));

玩得开心！

Answer 2

您可以尝试使用property-injection在TreeViewModel类中设置“TstTreeNode”值。以下是示例代码： -

    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;

注入已经使用Ninject创建的依赖关系

2 个答案: