再造轮子--中文金额转换 C#正则版

最近在学习C# 正则方面的编程,出于练习的目的,

改了一下原来的   中文金额转换 方法,感觉效率比以前的高了许多

拿来跟大家分享一下,欢迎大家来拍砖啊... 

代码:

Code

public string ConvertToCnNum(string num)

        {

            Regex regNum = new Regex(@"^([1-9]\d+|[1-9])(\.\d\d?)*$");

            Match matchNum = regNum.Match(num);

            if (matchNum.Success)

            {

                string[] AA = new string[10] { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };

                string[] BB = new string[8] { "", "拾", "佰", "仟", "萬", "億", "", "" };

            string[] a = Regex.Replace(num,"(^0*)","").Split('.');

                int k = 0; string re = "";

                for (int i = a[0].Length - 1; i >= 0;i-- )

                {

                    char[] ca = a[0].ToCharArray();

                    string aTemp = "";

                    try

                    {

                        aTemp = Convert.ToString(ca[i + 2]);

                    }

                    catch { } 

                    string bTemp = "";

                    try

                    {

                        bTemp = Convert.ToString(ca[i + 1]);

                    }

                    catch { }

                    if (aTemp != "0" && aTemp!="" && bTemp == "0")

                    {

                        re = AA[0] + re;

                    }

                        switch (k)

                        {   

                            case 0: re = BB[7] + re; break;

                            case 4:

                                Regex regTemp = new Regex(@"0{4}\d{" + (a[0].Length - i - 1)+"}$");

                                Match matchTemp = regTemp.Match(a[0]);

                                if (!matchTemp.Success)

                                {

                                    re = BB[4] + re; 

                                }

                                break;  

                            case 8: re = BB[5] + re; BB[7] = BB[5]; k = 0; break;  



                        }

                        char[] caTemp = a[0].ToCharArray();

                        string cTemp = Convert.ToString(caTemp[i]);

                        if (cTemp != "0")

                        {

                            re=AA[Convert.ToInt32(cTemp)]+BB[k%4]+re;

                        } 

                        k++; 

                }

                re=re.Replace(@"零萬","萬零");

                re = re.Replace(@"零億", "億零");

                re = re + "圆";

                if(a.Length>1)

                {

                    re+=BB[6];

                    for(int i=0;i<a[1].Length;i++)

                    {

                        char[] caTemp = a[1].ToCharArray();

                        string dTemp = Convert.ToString(caTemp[i]);

                        if(i==0)

                        {

                            re+=AA[Convert.ToInt32(dTemp)]+"角";

                        }

                        if(i==1)

                        {

                            re+=AA[Convert.ToInt32(dTemp)]+"分";

                        }

                    }

                }

                else if(re!="") re+="整";

                return re; 

            }

            else 

            {

                //不是数字

            }

            return "error";

        }