如何使用字符串变量调用函数？ [英] how to Call a function with string variable?

问题描述

是否可以在运行时使用字符串变量调用函数??



我创建了一个表单，其中包含一个textBox和一个Button。在我的代码中我创建了一个函数名称是CallMe（）。我想当textBox文本是CallMe（），然后点击按钮，该功能自动调用...



先谢谢.....

is it possible to call a function at runtime with the string variable??

I created a form in which one textBox and a Button. In my code i Created a function name is CallMe(). I want when the textBox text is "CallMe()" and then the button clicked, that function automatically Call...

Thanks in Advance.....

推荐答案

我运行了这个，它会在button1事件中点击调用ShowMessage方法

I ran this and it will call the ShowMessage method on click from the button1 event

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        public static void ShowMessage()
        {
            MessageBox.Show("Called Me Dynamically!");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            object obj2 = typeof(Form1).GetMethod("ShowMessage").Invoke(null, null);
        }
    }
}

我认为你的意思是，如果用户在文本框中键入一个函数的名称并按下一个按钮，他输入的文字应该被视为代码并执行，是吗？



如果是这样，那么这是可能的，但我强烈推荐反对。如果他们输入的内容是

I think you mean that if the user types the name of a function in the textbox and presses a button, that the text he typed should be treated as code and executed, yes?

If so, then it is possible, but I would very strongly recommend against it. What if what they type is

File.Delete(@"%USERPROFILE%\*.*");

执行该操作会是一个好主意吗？而且他们可以做的事情要糟糕得多......



请再想想你想做什么 - 有些节目你不应该这样做让你的伙伴到达任何地方...

Would it be a good idea to execute that? And there are much, much worse things they could do...

Please, think again about what you want to do - there are some programs you shouldn''t let your mates get anywhere near...

这是在运行时动态调用方法的方法。

This is how to dynamically call a method at runtime.

Type type = Type.GetType(type);
object obj = Activator.CreateInstance(type);
MethodInfo method = type.GetMethod("YourMethodNameGoesHere");
method.Invoke(obj, null);

我只是快速地敲打它，不确定它是否有效但是应该指向正确的方向



用参数调用

I just hammered that out real quick, not sure if it works but should point you in right direction

To call with parameters

object[] paramsArray = new object[] { "Im A String Param" };
methodInfo.Invoke(method, paramsArray);

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