C#实现动态编译代码

/*------------------------------------------------------------------------------
*  Copyright (C) 2013
*  版权所有。
*
*  文件名:     Compile.cs
*  功能說明:
*
*  創建人：    it_Eric
*  創建時間:   2013/10/25 16:19:52
*
*  修改人：
*  修改說明:
*
*-----------------------------------------------------------------------------*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.CodeDom.Compiler;
using Microsoft.CSharp;
using System.IO;
using System.Reflection;

namespace TestDemo
{
public  class Compile
{
private string prefix = "using System;" +
"public static class Driver" +
"{" +
"public static void Run()" +
"{";
private string postfix =
"}" +
"}";
public string CompileAndRun(string input, out bool hasError)
{
hasError = false;
string returnData = null;

CompilerResults results = null;
using (var provider = new CSharpCodeProvider())
{
var options = new CompilerParameters();
options.GenerateInMemory = true;
var sb = new StringBuilder();
sb.Append(prefix);
sb.Append(input);
sb.Append(postfix);
results = provider.CompileAssemblyFromSource(options, sb.ToString());
}
if (results.Errors.HasErrors)
{
hasError = true;
var errorMessage = new StringBuilder();
foreach (CompilerError error in results.Errors)
{
errorMessage.AppendFormat("{0}{1}", error.Line, error.ErrorText);
returnData = errorMessage.ToString();
}

}
else
{
TextWriter temp = Console.Out;
var writer = new StringWriter();
Console.SetOut(writer);
Type drivertype = results.CompiledAssembly.GetType("Driver");
drivertype.InvokeMember("Run", System.Reflection.BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.Public, null, null, null);

Console.SetOut(temp);
returnData = writer.ToString();

}
return returnData;
}

}
}