函数调用 [英] Function call

问题描述

我有问题.
例子我在c#中有一个功能:

I have a problem.
Example I have a funtion in c#:

private void Data_show()
{
....
}

我想调用它，但不能正常调用:Data_show()
我要在调用时使用与字符串相同的函数名称:

I want call it but not call normal is:Data_show()
I want use string same function name for call, when I call:

Form_load(....)
{
string call_funtion="Data_show"
}

推荐答案

我认为您的意思是:如何使用反射来调用方法?
这是一个演示此方法的示例:

Hi,

I think what you mean is: How do I use reflection to call a method?
Here is an example demonstrating the approach:

using System;
using System.Reflection;
namespace Reflect
{
    class Program
    {
        static void Main(string[] args)
        {
            string strTypeName = "Reflect.Program";
            string strMethodName = "Method";
            // Use reflection to obtain the type and method infos
            Assembly assembly = Assembly.GetExecutingAssembly();
            Type type = assembly.GetType(strTypeName);
            MethodInfo method = type.GetMethod(strMethodName);
            // Call the method by creating an instance via reflection.
            Object objInstance = Activator.CreateInstance(type);
            method.Invoke(objInstance, null);
            Console.ReadKey();
        }
        public void Method() 
        {
            Console.WriteLine("I''m a method");
        }
    }
}

但是停下来！首先考虑一下为什么要这样做.问这个问题不是一个好兆头，这不是您的现实世界问题的解决方案； P不，开个玩笑，告诉我们您确切想做什么，也许比使用反射更好的方法...

But stop! First think about why you want to do something like this. Asking this question is not a good sign this is a solution for your real world problem ;P No, joke aside, tell us what you exactly want to do, maybe there is a better aproach than using reflection...

您问如何为方法赋予参数，函数调用(更新) [ ^ ]我改进了上面的示例

you asked how to give parameters to the method, Function call (update)[^]I improved the above example

using System;
using System.Reflection;
namespace Reflect
{
    class Program
    {
        static void Main(string[] args)
        {
            string strTypeName = "Reflect.Program"; // full type name!
            string strMethodName = "Method";
            string strMethodWithParamsName = "MethodWithParams";
            // Use reflection to obtain the type and method infos
            Assembly assembly = Assembly.GetExecutingAssembly();
            Type type = assembly.GetType(strTypeName);
            MethodInfo method = type.GetMethod(strMethodName);
            MethodInfo methodWithParams = type.GetMethod(strMethodWithParamsName);
            // Call the methods by creating an instance via reflection.
            Object objInstance = Activator.CreateInstance(type);
            // ... method 
            method.Invoke(objInstance, null);
            // ... method with parameters
            object[] aobjParams = new object[] { "bla", 5 };
            methodWithParams.Invoke(objInstance, aobjParams);
            Console.ReadKey();
        }
        public void Method() 
        {
            Console.WriteLine("I''m a method");
        }
        public void MethodWithParams(string strParam, int iParam)
        {
            Console.WriteLine("{0}, {1}", strParam, iParam);
        }
    }
}

但是，现在深吸一口气，您对反射一无所知，而是想使用它-可能只是在教程或文档(msdn)中阅读了基础知识.我想提供帮助，但是如果您使用这样的示例，它将为您带来最大的帮助:
哦-我不需要/使用/听说过/等的新事物.之前.
哦-解决了我的问题
哦-我想进一步了解它！
哦-...互联网...
哦-啊哈！
哦-也许我应该用我的见解帮助别人:酷:

But now take a deep breath, you don''t know about reflection and want to use it - maybe just read the basics in a tutorial or docu (msdn). I like to help but it will help you most if you use my example like this:
Oh - a new thing I didn''t need/use/heard of/etc. before.
Oh - solves my problem
Oh - I want to know more about it!
Oh - ... the internet ...
Oh - Aha!
Oh - maybe I should help others with my insights :cool:

这篇关于函数调用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！