C#实现中文简繁体互换

using  System;
using  System.Text;
using  System.Text.RegularExpressions;
using  System.IO;
using  System.Web;


///   <summary>
///  CG2BFilter 的摘要说明
///   </summary>
public   class  CG2BFilter : Stream
{
    Stream responseStream;
     long  position;
    StringBuilder responseHtml;

     public  CG2BFilter(Stream inputStream)
    {
        responseStream  =  inputStream;
        responseHtml  =   new  StringBuilder();
    }

     #region    Filter   overrides
     public   override   bool  CanRead
    {
         get  {  return   true ; }
    }

     public   override   bool  CanSeek
    {
         get  {  return   true ; }
    }

     public   override   bool  CanWrite
    {
         get  {  return   true ; }
    }

     public   override   void  Close()
    {
        responseStream.Close();
    }

     public   override   void  Flush()
    {
        responseStream.Flush();
    }

     public   override   long  Length
    {
         get  {  return   0 ; }
    }

     public   override   long  Position
    {
         get  {  return  position; }
         set  { position  =  value; }
    }

     public   override   long  Seek( long  offset, SeekOrigin origin)
    {
         return  responseStream.Seek(offset, origin);
    }

     public   override   void  SetLength( long  length)
    {
        responseStream.SetLength(length);
    }

     public   override   int  Read( byte [] buffer,  int  offset,  int  count)
    {
         return  responseStream.Read(buffer, offset, count);
    }
     #endregion

     #region    转换任务
     public   override   void  Write( byte [] buffer,  int  offset,  int  count)
    {
         string  strBuffer  =  System.Text.UTF8Encoding.UTF8.GetString(buffer, offset, count);
         string  finalHtml  =  Simplified2Traditional(strBuffer);
         byte [] data  =  System.Text.UTF8Encoding.UTF8.GetBytes(finalHtml);
        responseStream.Write(data,  0 , data.Length);

    }

     #endregion
     #region    自定义函数
     public   string  Traditional2Simplified( string  str)
    {  
         return  (Microsoft.VisualBasic.Strings.StrConv(str, Microsoft.VisualBasic.VbStrConv.SimplifiedChinese,  0 ));

    }
     public   string  Simplified2Traditional( string  str)
    {  
         return  (Microsoft.VisualBasic.Strings.StrConv(str  as  String, Microsoft.VisualBasic.VbStrConv.TraditionalChinese,  0 ));

    }
     #endregion
    

     // Response.Filter = new CG2BFilter(Response.Filter);在ASPX.CS页面里调用
}