用.NET语言开发自己的脚本语言

要利用.NET语言(例如:c# vb.net)开发自己的脚本语言必须实现2步:

1.能够动态编译.NET 源代码
2.动态调用.NET组件

首先我们介绍下动态条用.NET组件
1.新建1个工程作为组件接口DynamicInterface
创建新的类:
using System;

namespace DynamicInterface
{
 public interface IDynamic {
  string getString();
 }
}

2.新建1个工程作为需要动态调用的组件DynamicClass
引用DynamicInterface
创建新的类:
using System;

namespace DynamicCls
{
 public class DynamicClass:DynamicInterface.IDynamic //实现接口
 {
  public DynamicClass()
  {
  
  }
  #region IDynamic 成员

  public string getString() {
   // TODO:  添加 DynamicClass.getString 实现
   return "Hello World Huhong";
  }

  #endregion
 }

3.新建1个工程来动态调用DynamicClass
using System;
using System.Reflection;

using System.Threading;

namespace dynamicreference
{
 
 class DynamicReference
 {
  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main(string[] args)
  {
  
   string dllfilename=@"C:\DynamicClass.dll";
   Thread.GetDomain().AssemblyLoad+=new AssemblyLoadEventHandler(DynamicReference_AssemblyLoad);
   Thread.GetDomain().AssemblyResolve+=new ResolveEventHandler(DynamicReference_AssemblyResolve);
   Assembly asm=System.Reflection.Assembly.LoadFile(dllfilename);
   Type type=asm.GetType("DynamicCls.DynamicClass",true);
   Object oh=Activator.CreateInstance(type);
   MethodInfo mi = type.GetMethod("getString");
   Console.WriteLine(mi.Invoke(oh,null).ToString()); //利用反射机制运行
   DynamicInterface.IDynamic id=(DynamicInterface.IDynamic)oh; //利用接口运行
   Console.WriteLine(id.getString());
  }

  private static void DynamicReference_AssemblyLoad(object sender, AssemblyLoadEventArgs args) {
   Console.WriteLine("加载1个组件:"+args.LoadedAssembly.FullName );
  }

  private static Assembly DynamicReference_AssemblyResolve(object sender, ResolveEventArgs args) {
   Console.WriteLine("组件解析失败!");
   return null;
  }
 }
}

动态编译:
using System;
using System.IO;
using System.Text;
using Microsoft.CSharp;

namespace TestProject
{
public class DynamicCompile
{
private String _physicspath = @"D:\Project.Net\TestProject\DcCodeFile\";//文件夹的路径
private String _outputpath = @"D:\Project.Net\TestProject\bin";//输出文件的路径

private String[] _filelist; //文件列表
private String[] _cscode; //源码
private String[] _filename; //文件名
private String[] _import; //引用
private System.Collections.IDictionary configs = null;//编译属性参数配置

public DynamicCompile()
{}

public CompilerError[] ExCompiler()
{
Fill_cscode();
Fill_import();
Fill_configs();
CompilerError[] ce= Compiler.Compile(_cscode,_filename, _outputpath,_import, configs);
return ce;
}
private String[] Fill_filelist()
{
return System.IO.Directory.GetFiles(_physicspath,"*.cs");
}
private void Fill_cscode()
{
_filelist= Fill_filelist();
_cscode=new String[_filelist.Length];
_filename=new String[_filelist.Length];
for(int i=0;i<_filelist.Length;i++)
{
String filepath= _filelist.GetValue(i).ToString();//获取文件路径
_cscode[i]= ReadCodeFile(filepath, Encoding.GetEncoding("utf-8"));
_filename[i]= System.IO.Path.GetFileName(filepath);
}
}
private void Fill_import()
{
_import=new String[10];//数组长度视引用文件数量
_import[0]=@"C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.dll";
_import[1]=@"C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.Web.dll";
}
private void Fill_configs()
{
configs=new System.Collections.Specialized.ListDictionary();
configs.Add("target","library");
}
//读取cscode内容
private String ReadCodeFile(String path,Encoding encode)
{
String content=String.Empty;
try
{
if (File.Exists(path))
{
StreamReader sr=new StreamReader(path,encode);
content=sr.ReadToEnd();
sr.Close();
}
}
catch(IOException ex)
{
Console.Write(ex.ToString());
}
return content;
}
}
}