使用正则表达式判断字符串

后台代码：

 

/// <summary>
///ShowMatch 的摘要说明
/// </summary>
public class ShowMatch
{
    public ShowMatch()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    /// <summary>
    /// 验证字符串只含字母
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsLettersString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^[A-Za-z]+$");
    }

    /// <summary>
    /// 验证字符串只含汉字
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsChineseString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^[\u4e00-\u9fa5]+$");
    }

    /// <summary>
    /// 验证字符串只含字母和汉字
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsValidString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^[A-Za-z\u4e00-\u9fa5]+$");
    }

    /// <summary>
    /// 验证字符串是正确的电话号码形式(包括手机)
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsPhoneString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^(([0\+]\d{2,3}-)?(0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$|(^(13[0-9]|15[0|3|6|7|8|9]|18[8|9])\d{8}$)");
    }

    /// <summary>
    /// 验证字符串是正确的传真号码形式
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsByValueString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$");
    }

    /// <summary>
    /// 验证字符串是正确的电子邮箱格式
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool IsMailString(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
    }


    /// <summary>
    /// 验证字符串是只含数字
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool isNumberstring(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^[-]?\d+[.]?\d*$");
    }
    /// <summary>
    /// 验证字符串是正确的身份证号码
    /// </summary>
    /// <param name="strIn"></param>
    /// <returns></returns>
    public bool isIDCARD(string strIn)
    {
        return System.Text.RegularExpressions.Regex.IsMatch(strIn, @"^(\d{15}$|^\d{18}$|^\d{17}(\d|X|x))$");
    }
}

 

 

 

前台调用：

 

        ShowMatch showmatch = new ShowMatch();
        string str="abc";
        if (showmatch.IsLettersString(str))
        {
            Response.Write("true,只含字母");
        }
        else
        {
            Response.Write("false");
        }