C# 如何配置统一容器以提供字符串构造函数值？
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How to configure unity container to provide string constructor value?
提问by iAteABug_And_iLiked_it
This is my dadclass
这是我的dad课
public class Dad
{
public string Name
{
get;set;
}
public Dad(string name)
{
Name = name;
}
}
This is my test method
这是我的测试方法
public void TestDad()
{
UnityContainer DadContainer= new UnityContainer();
Dad newdad = DadContainer.Resolve<Dad>();
newdad.Name = "chris";
Assert.AreEqual(newdad.Name,"chris");
}
This is the error I am getting
这是我得到的错误
"InvalidOperationException - the type String cannot be constructed.
You must configure the container to supply this value"
How do I configure my DadContainerfor this assertion to pass?
Thank you
我如何配置我DadContainer的这个断言通过？谢谢
采纳答案by p.s.w.g
You should provide a parameterless constructor:
您应该提供一个无参数的构造函数：
public class Dad
{
public string Name { get; set; }
public Dad()
{
}
public Dad(string name)
{
Name = name;
}
}
If you can't provide a parameterless constructor, you need to configure the container to provide it, either by directly registering it with the container:
如果无法提供无参数构造函数，则需要配置容器以提供它，或者直接向容器注册：
UnityContainer DadContainer = new UnityContainer();
DadContainer.RegisterType<Dad>(
new InjectionConstructor("chris"));
or through the app/web.config file:
或通过 app/web.config 文件：
<configSections>
<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"/>
</configSections>
<unity>
<containers>
<container>
<register type="System.String, MyProject">
<constructor>
<param name="name" value="chris" />
</constructor>
</register >
</container>
</containers>
</unity>
