字符串扩展类

系统管理员 2021-03-25 14:48 610阅读 0赞

using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Security.Cryptography;
    using System.Text;
    using System.Text.RegularExpressions;
    using System.Xml;
    using System.Xml.Serialization;
    
    namespace Lbb.Cx.Ciac.Utility.Code
    {
        /// <summary>
        /// 字符串扩展类
        /// </summary>
        public static class StringExtension
        {
            /// <summary>
            /// 用于判断是否为空字符
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsBlank(this string s)
            {
                return s == null || (s.Trim().Length == 0);
            }
    
            /// <summary>
            /// 用于判断是否不为空字符
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsNotBlank(this string s)
            {
                return !s.IsBlank();
            }
            /// <summary>
            /// 判断是否为有效的Email地址
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidEmail(this string s)
            {
                if (!s.IsBlank())
                {
                    //return Regex.IsMatch(s,
                    //         @"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))" +
                    //         @"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$");
                    const string pattern = @"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$";
                    return Regex.IsMatch(s, pattern);
                }
                return false;
            }
    
            /// <summary>
            /// 验证是否是合法的电话号码
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidPhone(this string s)
            {
                if (!s.IsBlank())
                {
                    return Regex.IsMatch(s, @"^\+?((\d{2,4}(-)?)|($\d{2,4}$))*(\d{0,16})*$");
                }
                return true;
            }
    
            /// <summary>
            /// 验证是否是合法的手机号码
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidMobile(this string s)
            {
                if (!s.IsBlank())
                {
                    return Regex.IsMatch(s, @"^\+?\d{0,4}?[1][3-8]\d{9}$");
                }
                return false;
            }
    
            /// <summary>
            /// 验证是否是合法的邮编
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidZipCode(this string s)
            {
                if (!s.IsBlank())
                {
                    return Regex.IsMatch(s, @"[1-9]\d{5}(?!\d)");
                }
                return true;
            }
    
            /// <summary>
            /// 验证是否是合法的传真
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidFax(this string s)
            {
                if (!s.IsBlank())
                {
                    return Regex.IsMatch(s, @"(^[0-9]{3,4}\-[0-9]{7,8}$)|(^[0-9]{7,8}$)|(^$[0-9]{3,4}$[0-9]{3,8}$)|(^0{0,1}13[0-9]{9}$)");
                }
                return true;
            }
    
            /// <summary>
            /// 检查字符串是否为有效的INT32数字
            /// </summary>
            /// <param name="val"></param>
            /// <returns></returns>
            public static bool IsInt32(this string val)
            {
                if (IsBlank(val))
                    return false;
                Int32 k;
                return Int32.TryParse(val, out k);
            }
    
            /// <summary>
            /// 检查字符串是否为有效的INT64数字
            /// </summary>
            /// <param name="val"></param>
            /// <returns></returns>
            public static bool IsInt64(this string val)
            {
                if (IsBlank(val))
                    return false;
                Int64 k;
                return Int64.TryParse(val, out k);
            }
    
            /// <summary>
            /// 检查字符串是否为有效的Decimal
            /// </summary>
            /// <param name="val"></param>
            /// <returns></returns>
            public static bool IsDecimal(this string val)
            {
                if (IsBlank(val))
                    return false;
                decimal d;
                return Decimal.TryParse(val, out d);
            }
    
            /// <summary>
            /// 将字符串转换成MD5加密字符串
            /// </summary>
            /// <param name="orgStr"></param>
            /// <returns></returns>
            public static string ToMD5(this string orgStr)
            {
                MD5 md5Hasher = MD5.Create();
    
                // Convert the input string to a byte array and compute the hash.
                byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(orgStr));
    
                // Create a new Stringbuilder to collect the bytes
                // and create a string.
                StringBuilder sBuilder = new StringBuilder();
    
                // Loop through each byte of the hashed data 
                // and format each one as a hexadecimal string.
                for (int i = 0; i < data.Length; i++)
                {
                    sBuilder.Append(data[i].ToString("x2"));
                }
    
                // Return the hexadecimal string.
                return sBuilder.ToString();
            }
    
            /// <summary>
            /// 将对象序列化成XML
            /// </summary>
            /// <typeparam name="T"></typeparam>
            /// <param name="obj"></param>
            /// <returns></returns>
            public static string ToXML<T>(this T obj) where T : class
            {
                return ToXML(obj, Encoding.Default.BodyName);
            }
            public static string ToXML<T>(this T obj, string encodeName) where T : class
            {
                if (obj == null) throw new ArgumentNullException("obj", "obj is null.");
    
                if (obj is string) throw new ApplicationException("obj can't be string object.");
    
                Encoding en = Encoding.GetEncoding(encodeName);
                XmlSerializer serial = new XmlSerializer(typeof(T));
                XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
                ns.Add("", "");
                MemoryStream ms = new MemoryStream();
                XmlTextWriter xt = new XmlTextWriter(ms, en);
                serial.Serialize(xt, obj, ns);
                xt.Close();
                ms.Close();
                return en.GetString(ms.ToArray());
            }
            /// <summary>
            /// 将XML字符串反序列化成对象实体
            /// </summary>
            /// <typeparam name="T"></typeparam>
            /// <param name="s"></param>
            /// <returns></returns>
            public static T Deserial<T>(this string s) where T : class
            {
                return Deserial<T>(s, Encoding.Default.BodyName);
            }
            public static T Deserial<T>(this string s, string encodeName) where T : class
            {
                if (s.IsBlank())
                {
                    throw new ApplicationException("xml string is null or empty.");
                }
                XmlSerializer serial = new XmlSerializer(typeof(T));
                XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
                ns.Add("", "");
    
                return (T)serial.Deserialize(new StringReader(s));
            }
            /// <summary>
            /// 获取扩展名
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static string GetExt(this string s)
            {
                string ret = string.Empty;
                if (s.Contains('.'))
                {
                    string[] temp = s.Split('.');
                    ret = temp[temp.Length - 1];
                }
    
                return ret;
            }
            /// <summary>
            /// 验证QQ格式
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static bool IsValidQQ(this string s)
            {
                if (!s.IsBlank())
                {
                    return Regex.IsMatch(s, @"^[1-9]\d{4,15}$");
                }
                return false;
            }
    
            /// <summary>
            /// 字符串转成Int
            /// </summary>
            /// <param name="s"></param>
            /// <returns></returns>
            public static int ToInt(this string s)
            {
                int res;
                int.TryParse(s, out res);
                return res;
            }
        }
    }