C#正则表达式的6个简单例子

/// <summary>  
/// 验证输入字符串为数字  
/// </summary>  
/// <param name="P_str_num">输入字符</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validateNum(string P_str_num)  
{  
return Regex.IsMatch(P_str_num, "^[0-9]*$");  
} 

/// <summary>  
/// 验证输入字符串是否为电话号码  
/// </summary>  
/// <param name="P_str_phone">输入字符串</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validatePhone(string P_str_phone)  
{  
return Regex.IsMatch(P_str_phone, @"\d{3,4}-\d{7,8}");  
} 

/// <summary>  
/// 验证输入字符串是否为传真号码  
/// </summary>  
/// <param name="P_str_fax">输入字符串</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validateFax(string P_str_fax)  
{  
return Regex.IsMatch(P_str_fax, @"86-\d{2,3}-\d{7,8}");  
} 

/// <summary>  
/// 验证输入字符串是否为邮政编码  
/// </summary>  
/// <param name="P_str_postcode">输入字符串</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validatePostCode(string P_str_postcode)  
{  
return Regex.IsMatch(P_str_postcode, @"\d{6}");  
} 

/// <summary>  
/// 验证输入字符串是否为E-mail地址  
/// </summary>  
/// <param name="P_str_email">输入字符串</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validateEmail(string P_str_email)  
{  
return Regex.IsMatch(P_str_email, @"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*");  
} 

/// <summary>  
/// 验证输入字符串是否为网络地址  
/// </summary>  
/// <param name="P_str_naddress">输入字符串</param>  
/// <returns>返回一个bool类型的值</returns>  
public bool validateNAddress(string P_str_naddress)  
{  
return Regex.IsMatch(P_str_naddress, @"http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?");  
}