App_Code/Regular.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text.RegularExpressions;

/// <summary>
/// Regular 的摘要说明
/// </summary>
public class Regular
{
    /// <summary>
    /// 用户名验证
    /// </summary>
    /// <param name="username">用户名</param>
    /// <returns></returns>
    public bool IsUserName(string username)
    {
        return Regex.IsMatch(username, "^.{1,10}$");
    }
    /// <summary>
    /// 密码验证
    /// </summary>
    /// <param name="password">密码</param>
    /// <returns></returns>
    public bool IsPassWord(string password)
    {
        return Regex.IsMatch(password, "^.{3,20}$");
    }
    /// <summary>
    /// 邮箱名验证
    /// </summary>
    /// <param name="mail">邮箱名</param>
    /// <returns></returns>
    public bool IsMail(string mail)
    {
        return Regex.IsMatch(mail, ".+?@.+?\\..+");
    }
    /// <summary>
    /// 数字（ID）验证
    /// </summary>
    /// <param name="chars">待验证字符</param>
    /// <returns></returns>
    public static bool IsInt(string number)
    {
        return Regex.IsMatch(number, @"^\d{1,9}$");
    }
    /// <summary>
    /// 数字验证
    /// </summary>
    /// <param name="chars">待验证字符</param>
    /// <returns></returns>
    public bool IsNum(string number)
    {
        return Regex.IsMatch(number, @"^\d+$");