C#转换人民币大小金额

1. /// <summary>   
2.         /// 转换人民币大小金额   
3.         /// </summary>   
4.         /// <param name="num">金额</param>   
5.         /// <returns>返回大写形式</returns>   
6.         public static string GetChineseMoney(decimal num)  
7.         {  
8.             string str1 = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字   
9.             string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字   
10.             string str3 = "";    //从原num值中取出的值   
11.             string str4 = "";    //数字的字符串形式   
12.             string str5 = "";  //人民币大写金额形式   
13.             int i;    //循环变量   
14.             int j;    //num的值乘以100的字符串长度   
15.             string ch1 = "";    //数字的汉语读法   
16.             string ch2 = "";    //数字位的汉字读法   
17.             int nzero = 0;  //用来计算连续的零值是几个   
18.             int temp;            //从原num值中取出的值   
19.  
20.             if (DbUtils.Language.ToLower() == "en") return "";  
21.             num = Math.Round(Math.Abs(num), 2);    //将num取绝对值并四舍五入取2位小数   
22.             str4 = ((long)(num * 100)).ToString();        //将num乘100并转换成字符串形式   
23.             j = str4.Length;      //找出最高位   
24.             if (j > 15) { return "溢出"; }  
25.             str2 = str2.Substring(15 - j);   //取出对应位数的str2的值。如：200.55,j为5所以str2=佰拾元角分   
26.  
27.             //循环取出每一位需要转换的值   
28.             for (i = 0; i < j; i++)  
29.             {  
30.                 str3 = str4.Substring(i, 1);          //取出需转换的某一位的值   
31.                 temp = Convert.ToInt32(str3);      //转换为数字   
32.                 if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))  
33.                 {  
34.                     //当所取位数不为元、万、亿、万亿上的数字时   
35.                     if (str3 == "0")  
36.                     {  
37.                         ch1 = "";  
38.                         ch2 = "";  
39.                         nzero = nzero + 1;  
40.                     }  
41.                     else 
42.                     {  
43.                         if (str3 != "0" && nzero != 0)  
44.                         {  
45.                             ch1 = "零" + str1.Substring(temp * 1, 1);  
46.                             ch2 = str2.Substring(i, 1);  
47.                             nzero = 0;  
48.                         }  
49.                         else 
50.                         {  
51.                             ch1 = str1.Substring(temp * 1, 1);  
52.                             ch2 = str2.Substring(i, 1);  
53.                             nzero = 0;  
54.                         }  
55.                     }  
56.                 }  
57.                 else 
58.                 {  
59.                     //该位是万亿，亿，万，元位等关键位   
60.                     if (str3 != "0" && nzero != 0)  
61.                     {  
62.                         ch1 = "零" + str1.Substring(temp * 1, 1);  
63.                         ch2 = str2.Substring(i, 1);  
64.                         nzero = 0;  
65.                     }  
66.                     else 
67.                     {  
68.                         if (str3 != "0" && nzero == 0)  
69.                         {  
70.                             ch1 = str1.Substring(temp * 1, 1);  
71.                             ch2 = str2.Substring(i, 1);  
72.                             nzero = 0;  
73.                         }  
74.                         else 
75.                         {  
76.                             if (str3 == "0" && nzero >= 3)  
77.                             {  
78.                                 ch1 = "";  
79.                                 ch2 = "";  
80.                                 nzero = nzero + 1;  
81.                             }  
82.                             else 
83.                             {  
84.                                 if (j >= 11)  
85.                                 {  
86.                                     ch1 = "";  
87.                                     nzero = nzero + 1;  
88.                                 }  
89.                                 else 
90.                                 {  
91.                                     ch1 = "";  
92.                                     ch2 = str2.Substring(i, 1);  
93.                                     nzero = nzero + 1;  
94.                                 }  
95.                             }  
96.                         }  
97.                     }  
98.                 }  
99.                 if (i == (j - 11) || i == (j - 3))  
100.                 {  
101.                     //如果该位是亿位或元位，则必须写上   
102.                     ch2 = str2.Substring(i, 1);  
103.                 }  
104.                 str5 = str5 + ch1 + ch2;  
105.  
106.                 if (i == j - 1 && str3 == "0")  
107.                 {  
108.                     //最后一位（分）为0时，加上“整”   
109.                     str5 = str5 + '整';  
110.                 }  
111.             }  
112.             if (num == 0)  
113.             {  
114.                 str5 = "零元整";  
115.             }  
116.             return str5;  
117.         } 

本文转自linzheng 51CTO博客，原文链接:http://blog.51cto.com/linzheng/1078717