将MethodInfo转化为Delegate的方式

来源：互联网发布：工厂布局仿真软件编辑：程序博客网时间：2024/05/29 17:23

有时再用反射的时候，需要将反射出的方法注册给某个事件，这是就需要将改方法转化为delegate后才能绑定到对应的事件上

可以通过Delegate.CreateDelegate的方法来实现，如下：

/// <summary>          /// 生成反射过来的MethodInfo到指定类型的委托          /// </summary>          /// <typeparam name="T">EventArgs泛型类型</typeparam>          /// <param name="instance">当前对象</param>          /// <param name="method">需要转化为delegate的方法</param>          /// <returns></returns>          public static Delegate CreateDelegateFromMethodInfo<T>(Object instance,MethodInfo method) where T:EventArgs//约束泛型T只能是来自EventArgs类型的          {                Delegate del = Delegate.CreateDelegate(typeof(EventHandler<T>), instance, method);              EventHandler<T> mymethod = del as EventHandler<T>;              return mymethod;          }            /// <summary>          /// 生成反射过来的MethodInfo到指定类型的委托          /// </summary>          /// <typeparam name="T">EventHandle泛型类型</typeparam>          /// <param name="instance">当前对象</param>          /// <param name="method">需要转化为delegate的方法</param>          /// <returns></returns>          public static Delegate CreateDelegateFromMethodInfoByDelegate<T>(Object instance, MethodInfo method)          {                Delegate del = Delegate.CreateDelegate(typeof(T), instance, method);              EventHandler mymethod = del as EventHandler;              return mymethod;          }

private void button3_Click(object sender, EventArgs e)        {            var Instance = Activator.CreateInstance(typeof(Form1)) as Form1;            MethodInfo methodInfo = typeof(Form1).GetMethod("Method1");              EventHandler dd = Delegate.CreateDelegate(typeof(EventHandler), Instance,methodInfo) as EventHandler;            dd(null, null);        }public void Method1(object sender, EventArgs e)        {            MessageBox.Show("ee");        }

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