C#是一种编译型的语言，程序执行，首先要经过编译器编译，如何让C#像一种脚本一样，在要执行的时候，进行编译，这里，我们可以用Microsoft.CSharp空间下的CSharpCodeProvider提供类，来达到动态编译的效果。在这里，我新建一个控制台程序，在Program.cs类里引用using System.CodeDom.Compiler;
using System.Reflection;using Microsoft.CSharp;三大命名空间
复制代码 代码如下:
#region using directiry
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Reflection;
using Microsoft.CSharp;
#endregion
/*==============================================================================
*
* author:lichaoqiang@163.com
* link:http://my.oschina.net/lichaoqiang
*
*
* ============================================================================*/
namespace CodeDom
{
class Program
{
#region 主程序入口
/// <summary>
///主程序入口
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
//1>实例化C#代码服务提供对象
CSharpCodeProvider provider = new CSharpCodeProvider();
//2>声明编译器参数
CompilerParameters parameters = new CompilerParameters();
parameters.GenerateExecutable = false;
parameters.GenerateInMemory = true;
try
{
//3>动态编译
CompilerResults result = provider.CompileAssemblyFromSource(parameters, BuildCSharpCode());
if (result.Errors.Count > 0)
{
Console.Write("编译出错！");
}
//4>如果编译没有出错，此刻已经生成动态程序集LCQ.LCQClass
//5>开始玩C#映射
Assembly assembly = result.CompiledAssembly;
object obj = assembly.CreateInstance("LCQ.LCQClass");
Type type = assembly.GetType("LCQ.LCQClass");
//6>获取对象方法
MethodInfo method = type.GetMethod("Sum");
object[] objParameters = new object[2] { 1, 5 };
int iResult = Convert.ToInt32(method.Invoke(obj, objParameters));//唤醒对象，执行行为
Console.Write(iResult);
Console.Read();
}
catch (System.NotImplementedException ex)
{
Console.Write(ex.Message);
}
catch (System.ArgumentException ex)
{
Console.Write(ex.Message);
}
catch (Exception ex)
{
Console.Write(ex.Message);
}
}
#endregion
#region 生成代码块
/// <summary>
/// 生成代码块
/// </summary>
/// <returns></returns>
private static string BuildCSharpCode()
{
string fileName = AppDomain.CurrentDomain.BaseDirectory.Replace("Debug", string.Empty).Replace("Release", string.Empty) + "CodeFile.cs";
string strCodeDom = File.ReadAllText(fileName);
return strCodeDom;
}
#endregion
}
}