c#常用的验证类

 

 1using System; 
 2using System.Text.RegularExpressions; 
 3 
 4namespace CommonTools 
 5{ 
 6    /**//**//**//// <summary> 
 7    /// RegexLib 的摘要说明。 
 8    /// </summary> 
 9    public class RegexLib 
10    { 
11             
12            //验证Email地址 
13            public static bool IsValidEmail(string strIn) 
14            { 
15                // Return true if strIn is in valid e-mail format. 
16                return Regex.IsMatch(strIn, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]
17
18{2,4}|[0-9]{1,3})(\]?)$");  
19            } 
20            //dd-mm-yy 的日期形式代替 mm/dd/yy 的日期形式。 
21            public static string MDYToDMY(String input)  
22            { 
23                return Regex.Replace(input,"\\b(?\\d{1,2})/(?\\d{1,2})/(?\\d{2,4})\\b","${day}-${month}-${year}"); 
24            } 
25            //验证是否为小数 
26            public static bool IsValidDecimal(string strIn) 
27            { 
28                return Regex.IsMatch(strIn,@"[0].\d{1,2}|[1]");  
29            } 
30            //验证是否为电话号码 
31            public static bool IsValidTel(string strIn) 
32            { 
33                return Regex.IsMatch(strIn,@"(\d+-)?(\d{4}-?\d{7}|\d{3}-?\d{8}|^\d{7,8})(-\d+)?");  
34            } 
35            //验证年月日 
36            public static bool IsValidDate(string strIn) 
37            { 
38                return Regex.IsMatch(strIn,@"^2\d{3}-(?:0?[1-9]|1[0-2])-(?:0?[1-9]|[1-2]\d|3[0-1])(?:0?[1-9]|1\d|2[0-3]):
39
40(?:0?[1-9]|[1-5]\d):(?:0?[1-9]|[1-5]\d)$");  
41            } 
42            //验证后缀名 
43            public static bool IsValidPostfix(string strIn) 
44            { 
45                return Regex.IsMatch(strIn,@"\.(?i:gif|jpg)$");  
46            } 
47            //验证字符是否在4至12之间 
48            public static bool IsValidByte(string strIn) 
49            { 
50                return Regex.IsMatch(strIn,@"^[a-z]{4,12}$");  
51            } 
52            //验证IP 
53            public static bool IsValidIp(string strIn) 
54            { 
55                return Regex.IsMatch(strIn,@"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1
56
57\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$");  
58            }             
59 
60    } 
61} 
62