动态代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.CSharp;         // 用于编译C#源代码  
using System.Reflection; 
using System.CodeDom.Compiler;
namespace WindowsFormsApplication5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
             CodeCompiler.Compile(new string[] { }, textBox1.Text,"");
             listBox1.Items.Clear();
             foreach (string s in CodeCompiler.ErrorMessage) {
                 listBox1.Items.Add(s);
             }
             listBox1.Items.Add(CodeCompiler.Message);
        }
        //动态代码
        //using System;
        //class MyClass
        //{
        //    public string GetResult()
        //    {
        //        int a,b;
        //        a=3;b=5;a+=b;
        //        return a.ToString();
        //    }
        //}
        static class CodeCompiler 
        {       
            static public string Message;       
            static public List<string> ErrorMessage = new List<string>();
        
            public static bool Compile(string[] references, string source, string outputfile)
       
            {
            
                // 编译参数           
                CompilerParameters param = new CompilerParameters(references, outputfile, true);
                param.TreatWarningsAsErrors = false;                
                param.GenerateExecutable = false;                
                param.IncludeDebugInformation = true;

                // 编译  
                CSharpCodeProvider provider = new CSharpCodeProvider();
                CompilerResults result = provider.CompileAssemblyFromSource(param, new string[] { source });

                Message = "";               
                ErrorMessage.Clear();               
                if (!result.Errors.HasErrors)                
                { // 反射调用  
                      
                    Type t = result.CompiledAssembly.GetType("MyClass");
                    if (t != null) 
                    {                    
                        object o = result.CompiledAssembly.CreateInstance("MyClass");                        
                        Message = (string)t.InvokeMember("GetResult", BindingFlags.Instance | BindingFlags.InvokeMethod | BindingFlags.Public, null, o, null);
                     }
                     return true;
                 }

               
                foreach (CompilerError error in result.Errors)
                {  // 列出编译错误  
                    if (error.IsWarning) continue;
                     ErrorMessage.Add("Error(" + error.ErrorNumber + ") - " + error.ErrorText + "\t\tLine:" + error.Line.ToString() + "  Column:"+error.Column.ToString());
                 }
                 return false;
        
            }    
        }       
    }
}