public class Validator
{
#region 验证输入字符串为数字
/// <summary>
/// 验证输入字符串为数字
/// </summary>
/// <param name="strln">输入字符</param>
/// <returns>返回一个bool类型的值</returns>
public static bool IsNumber(string strln)
{
return Regex.IsMatch(strln, "^([0]|([1-9]+\\d{0,}?))(.[\\d]+)?$");
}
#endregion
/// <summary>
/// 判断用户输入是否为日期
/// </summary>
/// <param name="strln"></param>
/// <returns></returns>
/// <remarks>
/// 可判断格式如下（其中-可替换为/，不影响验证)
/// YYYY | YYYY-MM | YYYY-MM-DD | YYYY-MM-DD HH:MM:SS | YYYY-MM-DD HH:MM:SS.FFF
/// </remarks>
public static bool IsDateTime(string strln)
{
if (null == strln)
{
return false;
}
string regexDate = @"[1-2]{1}[0-9]{3}((-|\/|\.){1}(([0]?[1-9]{1})|(1[0-2]{1}))((-|\/|\.){1}((([0]?[1-9]{1})|([1-2]{1}[0-9]{1})|(3[0-1]{1})))( (([0-1]{1}[0-9]{1})|2[0-3]{1}):([0-5]{1}[0-9]{1}):([0-5]{1}[0-9]{1})(\.[0-9]{3})?)?)?)?$";
if (Regex.IsMatch(strln, regexDate))
{
//以下各月份日期验证，保证验证的完整性
int _IndexY = -1;
int _IndexM = -1;
int _IndexD = -1;
if (-1 != (_IndexY = strln.IndexOf("-")))
{
_IndexM = strln.IndexOf("-", _IndexY + 1);
_IndexD = strln.IndexOf(":");
}
else
{
_IndexY = strln.IndexOf("/");
_IndexM = strln.IndexOf("/", _IndexY + 1);
_IndexD = strln.IndexOf(":");
}
//不包含日期部分，直接返回true
if (-1 == _IndexM)
return true;
if (-1 == _IndexD)
{
_IndexD = strln.Length + 3;
}
int iYear = Convert.ToInt32(strln.Substring(0, _IndexY));
int iMonth = Convert.ToInt32(strln.Substring(_IndexY + 1, _IndexM - _IndexY - 1));
int iDate = Convert.ToInt32(strln.Substring(_IndexM + 1, _IndexD - _IndexM - 4));
//判断月份日期
if ((iMonth < 8 && 1 == iMonth % 2) || (iMonth > 8 && 0 == iMonth % 2))
{
if (iDate < 32)
return true;
}
else
{
if (iMonth != 2)
{
if (iDate < 31)
return true;
}
else
{
//闰年
if ((0 == iYear % 400) || (0 == iYear % 4 && 0 < iYear % 100))
{
if (iDate < 30)
return true;
}
else
{
if (iDate < 29)
return true;
}
}
}
}
return false;
}
#region 验证手机号
/// <summary>
/// 验证输入字符串为18位的手机号码
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static bool IsMobile(string strln)
{
return Regex.IsMatch(strln, @"^1[0123456789]\d{9}$", RegexOptions.IgnoreCase);
}
#endregion
/// <summary>
/// 验证身份证是否有效
/// </summary>
/// <param name="strln"></param>
/// <returns></returns>
public static bool IsIDCard(string strln)
{
if (strln.Length == 18)
{
bool check = IsIDCard18(strln);
return check;
}
else if (strln.Length == 15)
{
bool check = IsIDCard15(strln);
return check;
}
else
{
return false;
}
}
/// <summary>
/// 验证输入字符串为18位的身份证号码
/// </summary>
/// <param name="strln">输入的字符</param>
/// <returns></returns>
public static bool IsIDCard18(string strln)
{
long n = 0;
if (long.TryParse(strln.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(strln.Replace(‘x‘, ‘0‘).Replace(‘X‘, ‘0‘), out n) == false)
{
return false;//数字验证
}
string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
if (address.IndexOf(strln.Remove(2)) == -1)
{
return false;//省份验证
}
string birth = strln.Substring(6, 8).Insert(6, "-").Insert(4, "-");
DateTime time = new DateTime();
if (DateTime.TryParse(birth, out time) == false)
{
return false;//生日验证
}
string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(‘,‘);
string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(‘,‘);
char[] Ai = strln.Remove(17).ToCharArray();
int sum = 0;
for (int i = 0; i < 17; i++)
{
sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
}
int y = -1;
Math.DivRem(sum, 11, out y);
if (arrVarifyCode[y] != strln.Substring(17, 1).ToLower())
{
return false;//校验码验证
}
return true;//符合GB11643-1999标准
}
/// <summary>
/// 验证输入字符串为15位的身份证号码
/// </summary>
/// <param name="strln">输入的字符</param>
/// <returns></returns>
public static bool IsIDCard15(string strln)
{
long n = 0;
if (long.TryParse(strln, out n) == false || n < Math.Pow(10, 14))
{
return false;//数字验证
}
string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
if (address.IndexOf(strln.Remove(2)) == -1)
{
return false;//省份验证
}
string birth = strln.Substring(6, 6).Insert(4, "-").Insert(2, "-");
DateTime time = new DateTime();
if (DateTime.TryParse(birth, out time) == false)
{
return false;//生日验证
}
return true;//符合15位身份证标准
}
/// <summary>
/// 验证输入字符串为电话号码
/// </summary>
/// <param name="P_str_phone">输入字符串</param>
/// <returns>返回一个bool类型的值</returns>
public static bool IsPhone(string strln)
{
return Regex.IsMatch(strln, @"(^(\d{2,4}[-_－—]?)?\d{3,8}([-_－—]?\d{3,8})?([-_－—]?\d{1,7})?$)|(^0?1[35]\d{9}$)");
//弱一点的验证： @"\d{3,4}-\d{7,8}"
}
/// <summary>
/// 验证是否是有效邮箱地址
/// </summary>
/// <param name="strln">输入的字符</param>
/// <returns></returns>
public static bool IsEmail(string strln)
{
return Regex.IsMatch(strln, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
}
/// <summary>
/// 验证是否是有效传真号码
/// </summary>
/// <param name="strln">输入的字符</param>
/// <returns></returns>
public static bool IsFax(string strln)
{
return Regex.IsMatch(strln, @"^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$");
}
/// <summary>
/// 验证是否只含有汉字
/// </summary>
/// <param name="strln">输入的字符</param>
/// <returns></returns>
public static bool IsOnllyChinese(string strln)
{
return Regex.IsMatch(strln, @"^[\u4e00-\u9fa5]+$");
}
}
原文：http://www.cnblogs.com/Alex80/p/4372849.html