Unity构造函数参数 [英] Unity constructor parameters
本文介绍了Unity构造函数参数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
class Entity:IEntityName
{
#region IEntityName Members
public string FirstName { get; set; }
public string LastName { get; set; }
#endregion
}
public class Person:IPerson
{
public IEntityName EntityName;
public Person()
{
}
public Person(IEntityName EntityName)
{
this.EntityName = EntityName;
}
public string ReverseName()
{
return string.Format("Your reverse name is {0} {1}",EntityName.LastName, EntityName.FirstName);
}
public override string ToString()
{
return string.Format("Name is {0} {1}", EntityName.FirstName, EntityName.LastName);
}
}
// Main Method
private static string DisplayReverseName(string fName,string lName)
{
IUnityContainer container = new UnityContainer();
container.RegisterType<IPerson, Person>().RegisterType<IEntityName,Entity>();
IEntityName entityName = container.Resolve<IEntityName>();
entityName.FirstName = fName;
entityName.LastName = lName;
var p = container.Resolve<IPerson>();
return p.ReverseName(); // firstName and lastName are still null
}
如何将firstName和lastName注入到Person构造函数中?
How can I inject the firstName and lastName into Person constructor ?
推荐答案
您可以使用ParameterOverride,例如:
You can use a ParameterOverride like:
var p = container.Resolve<IPerson>(new ParameterOverride("EntityName", entityName));
这告诉统一向构造函数提供 entityName
实例,并为其提供名为"EntityName"的参数.
This tells unity to supply the entityName
instance to the constructor with the parameter named "EntityName".
您可以在此处找到一些其他信息: http://msdn.microsoft.com/zh-CN/library/ff660920(v = pandp.20).aspx
You can find some additional info here: http://msdn.microsoft.com/en-us/library/ff660920(v=pandp.20).aspx
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