假设我有以下属性类。
//Attribute Implementation
public abstract class TestAttribute : Attribute
{
public abstract void UpdateSomething(string s);
}
public class CustomAttTest : TestAttribute
{
private State state;
public CustomAttTest(State state)
{
this.state = state;
}
public override void UpdateSomething(string s)
{
if (state.Equals(State.First))
{
Console.WriteLine("First State!! " + s);
}
}
}
public enum State
{
First, Second, Third
}
如何在属性类中调用Updatesomthing函数? 以下是属性实现示例。
public abstract class Vehicle
{
//Coode
}
[CustomAttTest(State.First)]
public class Ferrari : Vehicle
{
//Code
}
以下是完整代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication3
{
class Program
{
static void Main(string[] args)
{
var foo = new Ferrari();
//How do i call the UpdateSomething implemented insde the CustomAttTest attribute class?
}
}
public abstract class Vehicle
{
//Coode
}
[CustomAttTest(State.First)]
public class Ferrari : Vehicle
{
//Code
}
//Attribute Implementation
public abstract class TestAttribute : Attribute
{
public abstract void UpdateSomething(string s);
}
public class CustomAttTest : TestAttribute
{
private State state;
public CustomAttTest(State state)
{
this.state = state;
}
public override void UpdateSomething(string s)
{
if (state.Equals(State.First))
{
Console.WriteLine("First State!! " + s);
}
}
}
public enum State
{
First, Second, Third
}
}
答案 0 :(得分:1)
你需要使用反射:
foo.GetType().GetCustomAttribute<CustomAttTest>().UpdateSomething(...);
但是,您应该使用抽象方法或属性而不是属性。