动态编译

/// <summary>
        /// 动态编译并执行代码
        /// </summary>
        /// <param name="code">代码</param>
        /// <param name="newPath">输出dll的路径</param>
        /// <returns>返回输出内容</returns>
        private CompilerResults debugRun(string[] code, string newPath)
        {
            CSharpCodeProvider complier = new CSharpCodeProvider();
            //设置编译参数
            CompilerParameters paras = new CompilerParameters();
            //引入第三方dll
            paras.ReferencedAssemblies.Add(@"System.dll");
            paras.ReferencedAssemblies.Add(@"System.configuration.dll");
            paras.ReferencedAssemblies.Add(@"System.Data.dll");
            paras.ReferencedAssemblies.Add(@"System.Management.dll");
            paras.ReferencedAssemblies.Add(@"System.Web.dll");
            paras.ReferencedAssemblies.Add(@"System.Xml.dll");
            paras.ReferencedAssemblies.Add(@"F:\AuthorizationService\Lib\Newtonsoft.Json\Net20\Newtonsoft.Json.dll");
            //引入自定义dll
            //paras.ReferencedAssemblies.Add(@"D:\自定义方法\自定义方法\bin\LogHelper.dll");
            //是否内存中生成输出
            paras.GenerateInMemory = false;
            //是否生成可执行文件
            paras.GenerateExecutable = false;
            paras.OutputAssembly = newPath;

            //编译代码
            CompilerResults result = complier.CompileAssemblyFromSource(paras, code);

            return result;
        }

using System;
using System.Data;
using System.Configuration;
using System.Text;
using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.Reflection;

namespace EvalGuy
{
    /// <summary>
    /// 本类用来将字符串转为可执行文本并执行
    /// 从别处复制，勿随意更改！
    /// </summary>
    public class Evaluator
    {
        #region 构造函数
        /// <summary>
        /// 可执行串的构造函数
        /// </summary>
        /// <param name="items">
        /// 可执行字符串数组
        /// </param>
        public Evaluator(EvaluatorItem[] items)
        {
            ConstructEvaluator(items);        //调用解析字符串构造函数进行解析
        }
        /// <summary>
        /// 可执行串的构造函数
        /// </summary>
        /// <param name="returnType">返回值类型</param>
        /// <param name="expression">执行表达式</param>
        /// <param name="name">执行字符串名称</param>
        public Evaluator(Type returnType, string expression, string name)
        {
            //创建可执行字符串数组
            EvaluatorItem[] items = { new EvaluatorItem(returnType, expression, name) };
            ConstructEvaluator(items);        //调用解析字符串构造函数进行解析
        }
        /// <summary>
        /// 可执行串的构造函数
        /// </summary>
        /// <param name="item">可执行字符串项</param>
        public Evaluator(EvaluatorItem item)
        {
            EvaluatorItem[] items = { item };//将可执行字符串项转为可执行字符串项数组
            ConstructEvaluator(items);        //调用解析字符串构造函数进行解析
        }
        /// <summary>
        /// 解析字符串构造函数
        /// </summary>
        /// <param name="items">待解析字符串数组</param>
        private void ConstructEvaluator(EvaluatorItem[] items)
        {

            
            //创建C#编译器实例
            ICodeCompiler comp = (new CSharpCodeProvider().CreateCompiler());
            //编译器的传入参数
            CompilerParameters cp = new CompilerParameters();

            cp.ReferencedAssemblies.Add("system.dll");                //添加程序集 system.dll 的引用
            cp.ReferencedAssemblies.Add("system.data.dll");            //添加程序集 system.data.dll 的引用
            cp.ReferencedAssemblies.Add("system.xml.dll");            //添加程序集 system.xml.dll 的引用
            cp.GenerateExecutable = false;    //不生成可执行文件
            
            cp.GenerateInMemory = true;                                //在内存中运行

            StringBuilder code = new StringBuilder();                //创建代码串
            /*
             *  添加常见且必须的引用字符串
             */
            code.Append("using System; \n");
            code.Append("using System.Data; \n");
            code.Append("using System.Data.SqlClient; \n");
            code.Append("using System.Data.OleDb; \n");
            code.Append("using System.Xml; \n");

            code.Append("namespace EvalGuy { \n");                    //生成代码的命名空间为EvalGuy，和本代码一样

            code.Append(" static class Program{ static void Main(){}}\n");//无用的M

            code.Append("  public class _Evaluator { \n");            //产生 _Evaluator 类，所有可执行代码均在此类中运行
            foreach (EvaluatorItem item in items)                //遍历每一个可执行字符串项
            {
                code.AppendFormat("    public {0} {1}() ",            //添加定义公共函数代码
                                  item.ReturnType.Name,                //函数返回值为可执行字符串项中定义的返回值类型
                                  item.Name);                        //函数名称为可执行字符串项中定义的执行字符串名称
                code.Append("{ ");                                    //添加函数开始括号
                code.AppendFormat("return ({0});", item.Expression);//添加函数体，返回可执行字符串项中定义的表达式的值
                code.Append("}\n");                                    //添加函数结束括号
            }
            code.Append("} }");                                    //添加类结束和命名空间结束括号

            //得到编译器实例的返回结果
            CompilerResults cr = comp.CompileAssemblyFromSource(cp, code.ToString());

            if (cr.Errors.HasErrors)                            //如果有错误
            {
                StringBuilder error = new StringBuilder();            //创建错误信息字符串
                error.Append("编译有错误的表达式: ");                //添加错误文本
                foreach (CompilerError err in cr.Errors)            //遍历每一个出现的编译错误
                {
                    error.AppendFormat("{0}\n", err.ErrorText);        //添加进错误文本，每个错误后换行
                }
                throw new Exception("编译错误: " + error.ToString());//抛出异常
            }
            Assembly a = cr.CompiledAssembly;       //获取编译器实例的程序集
            
            _Compiled = a.CreateInstance("EvalGuy._Evaluator");        //通过程序集查找并声明 EvalGuy._Evaluator 的实例
        }
        #endregion

        #region 公有成员
        /// <summary>
        /// 执行字符串并返回整型值
        /// </summary>
        /// <param name="name">执行字符串名称</param>
        /// <returns>执行结果</returns>
        public int EvaluateInt(string name)
        {
            return (int)Evaluate(name);
        }
        /// <summary>
        /// 执行字符串并返回字符串型值
        /// </summary>
        /// <param name="name">执行字符串名称</param>
        /// <returns>执行结果</returns>
        public string EvaluateString(string name)
        {
            return (string)Evaluate(name);
        }
        /// <summary>
        /// 执行字符串并返回布尔型值
        /// </summary>
        /// <param name="name">执行字符串名称</param>
        /// <returns>执行结果</returns>
        public bool EvaluateBool(string name)
        {
            return (bool)Evaluate(name);
        }
        /// <summary>
        /// 执行字符串并返 object 型值
        /// </summary>
        /// <param name="name">执行字符串名称</param>
        /// <returns>执行结果</returns>
        public object Evaluate(string name)
        {
            MethodInfo mi = _Compiled.GetType().GetMethod(name);//获取 _Compiled 所属类型中名称为 name 的方法的引用
            return mi.Invoke(_Compiled, null);                    //执行 mi 所引用的方法
        }
        #endregion

        #region 静态成员
        /// <summary>
        /// 执行表达式并返回整型值
        /// </summary>
        /// <param name="code">要执行的表达式</param>
        /// <returns>运算结果</returns>
        static public int EvaluateToInteger(string code)
        {
            Evaluator eval = new Evaluator(typeof(int), code, staticMethodName);//生成 Evaluator 类的对像
            return (int)eval.Evaluate(staticMethodName);                        //执行并返回整型数据
        }
        /// <summary>
        /// 执行表达式并返回字符串型值
        /// </summary>
        /// <param name="code">要执行的表达式</param>
        /// <returns>运算结果</returns>
        static public string EvaluateToString(string code)
        {
            Evaluator eval = new Evaluator(typeof(string), code, staticMethodName);//生成 Evaluator 类的对像
            return (string)eval.Evaluate(staticMethodName);                        //执行并返回字符串型数据
        }
        /// <summary>
        /// 执行表达式并返回布尔型值
        /// </summary>
        /// <param name="code">要执行的表达式</param>
        /// <returns>运算结果</returns>
        static public bool EvaluateToBool(string code)
        {
            Evaluator eval = new Evaluator(typeof(bool), code, staticMethodName);//生成 Evaluator 类的对像
            return (bool)eval.Evaluate(staticMethodName);                        //执行并返回布尔型数据
        }
        /// <summary>
        /// 执行表达式并返回 object 型值
        /// </summary>
        /// <param name="code">要执行的表达式</param>
        /// <returns>运算结果</returns>
        static public object EvaluateToObject(string code)
        {
            Evaluator eval = new Evaluator(typeof(object), code, staticMethodName);//生成 Evaluator 类的对像
            return eval.Evaluate(staticMethodName);                                //执行并返回 object 型数据
        }
        #endregion

        #region 私有成员
        /// <summary>
        /// 静态方法的执行字符串名称
        /// </summary>
        private const string staticMethodName = "__foo";
        /// <summary>
        /// 用于动态引用生成的类，执行其内部包含的可执行字符串
        /// </summary>
        object _Compiled = null;
        #endregion
    }
    /// <summary>
    /// 可执行字符串项（即一条可执行字符串）
    /// </summary>
    public class EvaluatorItem
    {
        /// <summary>
        /// 返回值类型
        /// </summary>
        public Type ReturnType;
        /// <summary>
        /// 执行表达式
        /// </summary>
        public string Expression;
        /// <summary>
        /// 执行字符串名称
        /// </summary>
        public string Name;
        /// <summary>
        /// 可执行字符串项构造函数
        /// </summary>
        /// <param name="returnType">返回值类型</param>
        /// <param name="expression">执行表达式</param>
        /// <param name="name">执行字符串名称</param>
        public EvaluatorItem(Type returnType, string expression, string name)
        {
            ReturnType = returnType;
            Expression = expression;
            Name = name;
        }
    }
}

private void menu_export_Click(object sender, EventArgs e)
        {
            string sourceName = "MyForm.cs";
            FileInfo sourceFile = new FileInfo(sourceName);
            CSharpCodeProvider provider = new CSharpCodeProvider();

            status_content_label.Text = "Exporting ... ";

            String exeName = String.Format(@"{0}\{1}.exe", "Output/", sourceFile.Name.Replace(".", "_"));

            CompilerParameters cp = new CompilerParameters();

            cp.ReferencedAssemblies.Add("System.dll");
            cp.ReferencedAssemblies.Add("System.Drawing.dll");
            cp.ReferencedAssemblies.Add("System.Windows.Forms.dll");
            //cp.ReferencedAssemblies.Add("AxInterop.ShockwaveFlashObjects.dll");
            //cp.ReferencedAssemblies.Add("Interop.ShockwaveFlashObjects.dll");
            //cp.ReferencedAssemblies.Add("System.Data.dll");

            // Generate an executable instead of 
            // a class library.
            cp.GenerateExecutable = true;

            // Specify the assembly file name to generate.
            cp.OutputAssembly = exeName;

            // Save the assembly as a physical file.
            cp.GenerateInMemory = false;

            cp.IncludeDebugInformation = false;

            // Set whether to treat all warnings as errors.
            cp.TreatWarningsAsErrors = false;

            cp.CompilerOptions = "/optimize /win32icon:" + config.GetIconPath() + " MyForm.cs";

            // Invoke compilation of the source file.
            CompilerResults cr = provider.CompileAssemblyFromFile(cp, sourceName);

            string errorMessage;

            if (cr.Errors.Count > 0)
            {
                // Display compilation errors.
                errorMessage = "Errors building {0} into {1}" + sourceName + cr.PathToAssembly + "\n";
                foreach (CompilerError ce in cr.Errors)
                {
                    errorMessage += "  {0}" + ce.ToString() + "\n";
                }
                errorReport.ShowError(errorMessage);
                errorReport.Show();

                status_content_label.Text = "Failed to create the exe file.";
            }
            else
            {
                status_content_label.Text = "Exe file successfully created.";
            }
        }

using System;
using System.Drawing;
using System.Windows.Forms;

class MyForm : Form
{
    public MyForm()
    {
        this.Text = "Hello World";
        this.StartPosition = FormStartPosition.CenterScreen;
    }

    public static void Main()
    {
        Application.Run(new MyForm());
    }
}