C#正则验证函数

阳光穿透心脏的1/2处 2021-07-24 22:58 378阅读 0赞

1、Ip地址验证

2、价格验证

3、正整数验证

4、验证正负货币格式（保留小数点2位）

**1、Ip地址验证**

/// <summary>
    /// Ip地址验证
    /// </summary>
    public static bool CheckIp(string ip)
    {
        bool result = false;
        Regex ipReg = new Regex(@"^(\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\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$");
        if (ipReg.IsMatch(ip))
        {
            result = true;
        }
        return result;
    }

**2、价格验证**

/// <summary>
    /// 价格验证
    /// </summary>
    /// <param name="priceStr"></param>
    /// <returns></returns>
    public bool CheckPrice(string priceStr)
    {
        bool result = false;
        Regex regex = new Regex(@"^\d+(\.\d{1,2})?$", RegexOptions.IgnoreCase);
        Match match = regex.Match(priceStr);
        if (match.Success)
        {
            result = true;
        }
        return result;
    }

**3、正整数验证**

/// <summary>
    /// 正整数验证
    /// </summary>
    public static bool CheckPositiveInteger(string numStr)
    {
        bool result = false;
        Regex regex = new Regex(@"^[1-9]\d*$", RegexOptions.IgnoreCase);
        Match match = regex.Match(numStr);
        if (match.Success)
        {
            result = true;
        }
        return result;
    }

**4、验证正负货币格式（保留小数点2位）**

/// <summary>  
    /// 验证正负货币格式（保留小数点2位）  
    /// </summary>  
    /// <param name="priceStr"></param>  
    /// <returns></returns>  
    public bool CheckPrice(string priceStr)
    {
        bool result = false;   
        Regex regex = new Regex(@"^([-]?[1-9]\d*(\.\d{1,2})?$)|(^[-]?[0]{1}(\.\d{1,2})?$)", RegexOptions.IgnoreCase);
        Match match = regex.Match(priceStr);
        if (match.Success)
        {
            result = true;
        }
        return result;
    }