原创  C# 动态编译之 hello world

分类: 2015-01-09T17:40:53    288人阅读   
using System;
using System.Reflection;
using System.Globalization;
using Microsoft.CSharp;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Text;

namespace QuickSharp
{
    public class Program
    {
        private static void Main()
        {
              // 1.CSharpCodePrivoder 
            CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();
            // 3.CompilerParameters 
            CompilerParameters objCompilerParameters = new CompilerParameters();
            objCompilerParameters.ReferencedAssemblies.Add("System.dll");
            objCompilerParameters.GenerateExecutable = false;
            objCompilerParameters.GenerateInMemory = true;
            // 4.CompilerResults 
            CompilerResults cr = objCSharpCodePrivoder.CompileAssemblyFromSource(objCompilerParameters, GenerateCode());
            if (cr.Errors.HasErrors)
            {
                Console.WriteLine("编译错误:");
                foreach (CompilerError err in cr.Errors)
                {
                    Console.WriteLine(err.ErrorText);
                }
            }
            else
            {
                // 通过反射,调用HelloWorld的实例 
                Assembly objAssembly = cr.CompiledAssembly;
                object objHelloWorld = objAssembly.CreateInstance("DynamicCodeGenerate.HelloWorld");
                MethodInfo objMI = objHelloWorld.GetType().GetMethod("OutPut");
                Console.WriteLine(objMI.Invoke(objHelloWorld, null));
            }
            Console.ReadLine();
        }
         static string GenerateCode()
        {
            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();
            Console.WriteLine(code);
            Console.WriteLine();
            return code;
        }
    }
}
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