MethodInfo的和委托 [英] MethodInfo and Delegates

问题描述

我使用DOTNET 2.0

我知道有EventInfo值，可以通过大会的类型和循环查找所有EventInfo委托定义（EventInfo.EventHandlerType）匹配方法

有没有办法找出什么可以代表一个给定的MethodInfo可以在Delegate.CreateDelegate（）函数来分配不首先遍历所有引用的程序集找到所有的代表定义。

还是我坚持做了以下内容：

 公共BOOL MethodInfoDelegateSearch（MethodInfo的MI）{
  System.Collections.Generic.List＆LT;类型＆GT; delegateTypes =新System.Collections.Generic.List＆LT;类型＆GT;（）;
  的foreach（在AppDomain.CurrentDomain.GetAssemblies大会一（））
    的foreach（在a.GetTypes T型（））{
      如果（t.IsSubclassOf（typeof运算（代表）））
        delegateTypes.Add（T）;
    }

  的for（int i = 0; I＆LT; delegateTypes.Count;我++）{
    类型t = delegateTypes [I]
    / *
     *这里是尝试委托结构相匹配的MethodInfo的
     *我可以比较的参数或只是尝试创建委托
     * /
    尝试 {
      Delegate.CreateDelegate（T，MI，真正的）;
      返回true;
    } 抓住 {
    }
  }
  返回false;
}
 

解决方案

这听起来确实像你将通过一切需要循环。你说，你要找到所有可用的代表，将工作。它接受委托的功能并不一定可能被传递给它的方法中的任何链接，所以一个大的搜索会找到他们的唯一方法。

您可以通过只检查各类公共/内部访问减少花在搜索的时间。

I am using dotnet 2.0

I know that with an EventInfo value, you can loop through an Assembly's Types and find all the methods that match the EventInfo delegate definition ( EventInfo.EventHandlerType )

Is there a way to find out what available delegates a given MethodInfo can be assigned in the Delegate.CreateDelegate() function without first looping through all the referenced assemblies to find all the Delegate definitions.

Or am I stuck doing the following:

public bool MethodInfoDelegateSearch( MethodInfo mi ) {
  System.Collections.Generic.List<Type> delegateTypes = new System.Collections.Generic.List<Type>();
  foreach ( Assembly a in AppDomain.CurrentDomain.GetAssemblies() )
    foreach ( Type t in a.GetTypes() ) {
      if ( t.IsSubclassOf( typeof( Delegate ) ) )
        delegateTypes.Add( t );
    }

  for ( int i = 0; i < delegateTypes.Count; i++ ) {
    Type t = delegateTypes[i];
    /*
     * here is where to attempt match the delegate structure to the MethodInfo
     * I can compare parameters or just attempt to create the delegate
     */
    try {
      Delegate.CreateDelegate( t, mi, true );
      return true;
    } catch {
    }
  }
  return false;
}

解决方案

It sure sounds like you would need to loop through everything. You say that you want to find all "available" delegates that would work. The function which accepts a delegate doesn't have any links to the methods that could be passed to it, so a large search would be the only way to find them all.

You could reduce the time spent searching by only checking the types with public/internal access.

这篇关于MethodInfo的和委托的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！