数字小写转大写

//加到类的定义部分

private static string[] cstr={"零","壹","贰","叁","肆", "伍", "陆","柒","捌","玖"};

private static string[] wstr={"","","拾","佰","仟","萬","拾","佰","仟","億","拾","佰","仟"};

//数字必须在12位整数以内的字符串

//调用方式如：Label1.Text=ConvertInt("数字字符串");

public string ConvertInt(string str)

               {

               int len=str.Length;

            int i;

               string tmpstr,rstr;

                       rstr="";

                       for(i=1;i<=len;i++)

                       {

                       tmpstr=str.Substring(len-i,1);

                       rstr=string.Concat(cstr[Int32.Parse(tmpstr)]+wstr[i],rstr);

                       }

                       rstr=rstr.Replace("拾零","拾");

                       rstr=rstr.Replace("零拾","零");

            rstr=rstr.Replace("零佰","零");

            rstr=rstr.Replace("零仟","零");

                       rstr=rstr.Replace("零萬","萬");

                       for(i=1;i<=6;i++)

                       rstr=rstr.Replace("零零","零");

                       rstr=rstr.Replace("零萬","零");

                       rstr=rstr.Replace("零億","億");

                       rstr=rstr.Replace("零零","零"); 

                        rstr+="圆整";         

               return rstr;

               }