获取word文档或rtf格式文档的格式编码(可以应用此格式将字符以数据流的方式写入word或rtf文档)

/**//// <summary>
        /// 生成中文字符编码
        /// </summary>
        /// <param name="ChinaStr"></param>
        /// <returns></returns>
        private string GetCode(string ChinaStr)
        {
            string str1="";
            System.Windows.Forms.RichTextBox myRich1=new RichTextBox();
            myRich1.Text=ChinaStr;
            myRich1.SelectAll();
            ChinaStr=myRich1.SelectedRtf;
            int count1=ChinaStr.Length ;
            int start1=ChinaStr.IndexOf("fs18",0,count1);
            if (start1==-1)
                return str1;
            str1=ChinaStr.Substring(start1+4,count1-start1-4);
            
            string str3=@"{\rtf1\ansi\ansicpg936\deff0\deflang1033\deflangfe2052{\fonttbl{\f0\fswiss\fcharset0 Arial;}{\f1\fnil\fcharset134 \'cb\'ce\'cc\'e5;}}
\viewkind4\uc1\pard\lang2052\fs18\f1";
            str1=str3+str1;
            return str1;
  
        }

        private string GetCode(string ChinaStr,System.Drawing.Font newFont  )
        {
            string str1="";
            System.Windows.Forms.RichTextBox myRich1=new RichTextBox();
            myRich1.Font =newFont;
            myRich1.Text=ChinaStr;
            myRich1.SelectAll()  ;
            ChinaStr=myRich1.SelectedRtf;
            int count1=ChinaStr.Length ;
            int start1=ChinaStr.IndexOf(@"\fs",0,count1);
            if (start1==-1)
            {
                
                return str1;
            }
            ChinaStr=ChinaStr.Insert(start1+5,@"\f1");
          
            str1=ChinaStr ;

            return str1;
  
        }