如何在SimpleIOC中注册包含参数的类实例 [英] How to register a class instance including a parameter in SimpleIOC

问题描述

我需要创建一个ViewModel实例，并在创建时将特定参数传递给ViewModel.同时，此ViewModel实例应在SimpleIOC中注册

I need to create an instance of a ViewModel with a specific parameter passed to the ViewModel when created. At the same time this ViewModel instance should be registered in SimpleIOC

我认为这是解决问题的方法:

i thought this was the method for it:

SimpleIoc.Register<TClass> Method (Func<TClass>, String, Boolean)

的最后一个参数设置为true，以便立即创建. 因此，如果我正确理解，则此方法希望引用将创建我的ViewModel实例的方法.

with set to true for the last parameter for instant creation. so if i understood that correctly, this method wants a reference to a method that will create my ViewModel instance.

这看起来像是ClassFactory.

This is called a ClassFactory as it seems.

我试图自己做，但是我得到的只是

i tried to do it myself but all i get is

cannot convert from <Class> to System.Func<Class>

看起来好像总是传递类的实例，而不是应该创建该类的方法.

so as it seems im passing always the instance of the class, and not the method that should create it.

有人可以举一个简短的例子来说明如何使它工作吗

can someone give a short example how i can get this to work

public class ClassFactory
{
    public ChatWindow CreateChatWindow(RosterItemX ri)
    {
        return new ChatWindow(ri);
    }
}


public class ViewModelLocator
{
.
.
.
.
    public static void CreateWindow(RosterItemX riv)
    {
        ClassFactory cf = new ClassFactory;

        SimpleIoc.Default.Register<ChatWindow>(cf.CreateChatWindow(ri), "key", true )
        var _messageWindow = new MessageWindow();
        _messageWindow.Show();
    }
}


class ChatMessage
{
    RosterItemX ri = new RosterItemX();
    ViewModelLocator.CreateWindow(ri);


}

推荐答案

正如您自己所说，您正在为函数提供ChatWindow的实例.但是，它实际上期望一个创建ChatWindow的函数.只需使用() =>

As you yourself said you are giving an instance of a ChatWindow to the function. However, it actually expects a function that creates a ChatWindow. Just convert the first parameter to a lambda with () =>

SimpleIoc.Default.Register<ChatWindow>(() => cf.CreateChatWindow(ri), "key", true);

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