using System.Web.Mvc;

using System.CodeDom.Compiler;

using System.Text;

using Microsoft.CSharp;

namespace DynamicCompiler.Controllers

{

    public class HomeController : Controller

    {

        // GET: Home

        public ContentResult Index()

        {

            return Content(@"

                            这个页面是vs生成的<br>

                            <a href='/home/creat'>点击动态编译生成TestController</a><br>

                            <a href='/Test/'>访问TestController</a><br>

                            <a href='/Test/WithView'>测试带View的Action</a>

                        ");

        }

        public ContentResult Creat()

        {

            string cspath = Server.MapPath("~/TestController.cs");

            var compiler = CompilerFromCsPath("TestController", cspath); //编译

            #region 输出编译信息

            StringBuilder sb = new StringBuilder();

            sb.Append("cs文件路径：" + cspath);

            sb.Append("编译信息：" + "<br>");

            foreach (string output in compiler.Output)

            {

                sb.Append(output + "<br>");

            }

            sb.Append("错误信息：" + "<br>");

            foreach (CompilerError error in compiler.Errors)

            {

                sb.Append(error.ErrorText + "<br>");

            }

            #endregion

            return Content(sb.ToString());

        }

        /// <summary>

        /// 动态编译并执行代码

        /// </summary>

        /// <param name="csPath">代码</param>

        /// <param name="dllName">输出dll的路径</param>

        /// <returns>返回输出内容</returns>

        private CompilerResults CompilerFromCsPath(string dllName, params string[] csPath)

        {

            string binpath = Server.MapPath("~/bin/");

            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.linq.dll");

            paras.ReferencedAssemblies.Add("System.Web.dll");

            paras.ReferencedAssemblies.Add(binpath + "System.Web.Mvc.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 = binpath + dllName + ".dll";

            //编译代码

            CompilerResults result = complier.CompileAssemblyFromFile(paras, csPath);

            return result;

        }

    }

}