C# 动态编译简介

// Install-Package IronPython // 需要安装此 Nuget包// 引入动态类型之后// 可以在C#语言中与动态语言进行交互// 下面演示在C#中使用动态语言Python

ScriptEngine engine = Python.CreateEngine();

// 调用Python语言的print函数来输出engine.Execute("print 'Hello world'");

// 调用python求解汉罗塔问题engine.Execute(PythonCode1());

// 调用python进行计算，返回 dynamic 类型dynamic result = engine.Execute("123+456");

public static string PythonCode1(){    string code = "count=0\n" +                    "def move(n,A,B,C):\n" +                    "    global count\n" +                    "    if(n==1):\n" +                    "        print(A+\"->\"+C)\n" +                    "        count = count + 1\n" +                    "        return\n" +                    "    move(n - 1, A, C, B)\n" +                    "    move(1, A, B, C)\n" +                    "    move(n - 1, B, A, C)\n" +                    "    return\n" +                    "move(5,\"A\",\"B\",\"C\")";    return code;}

public static void Test1(){    CodeDomProvider compiler = new CSharpCodeProvider();     //编译器    CompilerParameters comPara = new CompilerParameters();   //编译器参数

    comPara.GenerateExecutable = true; // 生成exe文件    comPara.GenerateInMemory = false; // 是否在内存在输出    comPara.OutputAssembly = "SimpleCompile.exe"; // 输出文件 

    compiler.CompileAssemblyFromSource(comPara, GetCode1());    // 在当前目录生成 SimpleCompile.exe ，可直接运行}public static string GetCode1(){    string code = @"using System;            class Test            {                static void Main()                {                Console.WriteLine(""Hello world"");                Console.ReadLine();                }            }";    return code;}

public static void Test2(){    CodeDomProvider compiler = new CSharpCodeProvider();     //编译器    CompilerParameters comPara = new CompilerParameters();   //编译器参数

    comPara.GenerateExecutable = false;    comPara.GenerateInMemory = true;

    // GetCode2() 见文末     CompilerResults compilerResults = compiler.CompileAssemblyFromSource(comPara, GetCode2());

    if (compilerResults.Errors.HasErrors)    {        Console.WriteLine("编译错误");        foreach (CompilerError err in compilerResults.Errors)        {            Console.WriteLine(err.ErrorText);        }        return;    }

    // 通过反射，调用HelloWorld的实例    Assembly objAssembly = compilerResults.CompiledAssembly;    object objHelloWorld = objAssembly.CreateInstance("DynamicCodeGenerate.HelloWorld");    MethodInfo objMi = objHelloWorld?.GetType().GetMethod("OutPut");    var result = objMi?.Invoke(objHelloWorld, null);

    Console.WriteLine(result);

    // 动态类型调用     // 可以看到，动态调用比反射调用写法简介不少      dynamic dynObj = objAssembly.CreateInstance("DynamicCodeGenerate.HelloWorld");    var result2 = dynObj?.OutPut();

    Console.WriteLine(result2);}

var sqr = CSScript.Evaluator    .CreateDelegate(@"int Sqr(int a)                        {                            return a * a;                        }");

var r = sqr(3); // 计算3的平方

public static void Test1(){    // 得到 Assembly，反射调用    Assembly ass = CSScript.LoadCode(GetCode2()); // GetCode2()见文末    AsmHelper assAsmHelper = new AsmHelper(ass);     object obj = assAsmHelper.CreateObject("DynamicCodeGenerate.HelloWorld");    var method = assAsmHelper.GetMethod(obj, "OutPut");    object result = method.Invoke();

    // 动态调用    dynamic obj2 = CSScript.Evaluator.LoadCode(GetCode2());    dynamic result2 = obj2.OutPut();}

public static string GetCode2(){    StringBuilder sb = new StringBuilder();    sb.Append("using System;");    sb.Append(Environment.NewLine);    sb.Append("namespace DynamicCodeGenerate");    sb.Append(Environment.NewLine);    sb.Append("{");    sb.Append(Environment.NewLine);    sb.Append("    public class HelloWorld");    sb.Append(Environment.NewLine);    sb.Append("    {");    sb.Append(Environment.NewLine);    sb.Append("        public string OutPut()");    sb.Append(Environment.NewLine);    sb.Append("        {");    sb.Append(Environment.NewLine);    sb.Append("             return \"Hello world!\";");    sb.Append(Environment.NewLine);    sb.Append("        }");    sb.Append(Environment.NewLine);    sb.Append("    }");    sb.Append(Environment.NewLine);    sb.Append("}");

    string code = sb.ToString();

    return code;}