在 Visual C# 中运行时编译

Question

我正在学习使用CSharpCodeProvider、CompilerParameters、CompilerResults 等在运行时编译文件。

我能够通过一种方法获取字符串的内容。

public static string Test()    //This is in the file to be compiled.
{
    return "This is a test string!";
}

并使用

MethodInfo main = program.GetMethod("Test");    //This is in the main program.
//program is a Assembly Type generated in another part of the program.
str=main.Invoke(null, null).ToString();

获取字符串。

如何直接获取字符串？比如，

public string str="This is a test string!";    //This is in the file to be compiled.

我曾尝试将字符串设为属性并使用GetProperty("str");，但得到的只是属性的名称，例如。 str，我不知道如何获取字符串的content，例如。 这是一个测试字符串！。

以下是代码：

using System.IO;
using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.Reflection;

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

        private void Form1_Load(object sender, EventArgs e)
        {
            CSharpCodeProvider provider = new CSharpCodeProvider();
            CompilerParameters parameters = new CompilerParameters();

            parameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
            parameters.GenerateInMemory = true;
            parameters.GenerateExecutable = true;

            string str = File.ReadAllText(Directory.GetCurrentDirectory() + @"\MudLib\Test.c");
            CompilerResults results = provider.CompileAssemblyFromSource(parameters, str);

            if (results.Errors.HasErrors)
            {
                MessageBox.Show("Compiling error!");
                return;
            }
            Assembly assembly = results.CompiledAssembly;
            Type program = assembly.GetType("MudOS.Test");
            MethodInfo main = program.GetMethod("Test");
            resultString=main.Invoke(null, null).ToString();
            MessageBox.Show(resultString);

            PropertyInfo pinfo = program.GetProperty("str");
            MessageBox.Show(pinfo.Name.ToString());
            //I want the CONTENT of the string, not the NAME.
        }
    }
}

以下是运行时要编译的文件：Test.c

using System.Windows.Forms;

namespace MudOS
{
    class Test
    {
        public string testStr="This is a test string!";
        //I would like to know if it's possible to get this string directly.

        public string str
        {
            get{ return "This is a test string!"; }
            //I was unable to get this content.
        }

        public static void Main()
        {
        }

        public static string Test()
        {
            return "This is a test string!";
            //I was able to get this content just fine.
        }
    }
}

Answer 1

试试这个：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Reflection;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var type = typeof(MethodContainer);
            var method = type.GetMethod("MyMethod");
            var mc = new MethodContainer();
            string result = (string)method.Invoke(mc, null);
            Console.WriteLine(result); //Output: This is a test
        }
    }

    public class MethodContainer
    {
        public string MyMethod()
        {
            return "This is a test";
        }
    }
}

更新：

你必须获取你的类的类型（typeof(Your_Clas)），然后使用GetMethod()获取方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Reflection;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            MethodInfo method = typeof(Program).GetMethod("MyMethod");
            string result = (string)method.Invoke(null, null);
            Console.WriteLine(result);

        }

        public static string MyMethod()
        {
            return "LOL";
        }
    }        
}

Answer 2

program.getField("testStr").getValue(null). 

从程序集获取Type后试试这个方法