using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.Net; using System.IO; using System.Security.Cryptography; using System.Net.Mail; namespace passport.core.Tool { public static class StringExtensions { #region AsNull /// <summary> /// 如果字符串为空怎转换为NULL /// </summary> /// <param name="items"></param> /// <returns></returns> public static string AsNullIfEmpty(this string items) { return string.IsNullOrEmpty(items) ? null : items; } /// <summary> /// 如果字符串为空,空白字符则转换为NULL /// </summary> /// <param name="items"></param> /// <returns></returns> public static string AsNullIfWhiteSpace(this string items) { return string.IsNullOrWhiteSpace(items) ? null : items; } #endregion /// <summary> /// 截取字符串 /// </summary> /// <param name="str">字符串</param> /// <param name="len">长度</param> /// <returns></returns> public static string CutString(this string str, int len) { if (string.IsNullOrWhiteSpace(str)) return string.Empty; else { if (str.Length > len) return str.Substring(0, len); else { return str; } } } #region 截取字符串 /// <summary> /// 截取字符串 /// </summary> /// <param name="text">原字符串</param> /// <param name="characterCount">截取长度</param> /// <returns></returns> public static string Ellipsize(this string text, int characterCount) { return text.Ellipsize(characterCount, " …"); } /// <summary> /// 截取字符串 /// </summary> /// <param name="text">原字符串</param> /// <param name="characterCount">截取长度</param> /// <param name="ellipsis">省略部分</param> /// <returns></returns> public static string Ellipsize(this string text, int characterCount, string ellipsis) { if (string.IsNullOrWhiteSpace(text)) return ""; if (characterCount < 0 || text.Length <= characterCount) return text; return Regex.Replace(text.Substring(0, characterCount + 1), @"\s+\S*$", "") + ellipsis; } #endregion /// <summary> /// 移除HTML标签 /// </summary> /// <param name="html"></param> /// <returns></returns> public static string RemoveTags(this string html) { return string.IsNullOrEmpty(html) ? "" : Regex.Replace(html, "<[^<>]*>", "", RegexOptions.Singleline); } /// <summary> /// 去Html标签 /// </summary> /// <param name="Htmlstring"></param> /// <returns></returns> public static string ToNoHtmlString(this string Htmlstring) { //删除脚本 Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase); //删除HTML Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase); Htmlstring.Replace("<", ""); Htmlstring.Replace(">", ""); Htmlstring.Replace("\r\n", ""); //Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim(); return Htmlstring; } /// <summary> /// 拆分成数组 /// </summary> /// <param name="str">原字符串</param> /// <param name="strSplit">分隔字符</param> /// <returns>字符串数组</returns> public static string[] Split(this string str, string strSplit) { if (str.IndexOf(strSplit) < 0) { string[] tmp = { str }; return tmp; } return Regex.Split(str, Regex.Escape(strSplit), RegexOptions.IgnoreCase); } public static string MakeTinyUrl(this string Url) { try { if (!Url.ToLower().StartsWith("http") && !Url.ToLower().StartsWith("ftp")) { Url = "http://" + Url; } var request = WebRequest.Create("http://*****.net/api-create?url=" + System.Web.HttpUtility.UrlPathEncode(Url)); var res = request.GetResponse(); string text; using (var reader = new StreamReader(res.GetResponseStream())) { text = reader.ReadToEnd(); } return text; } catch (Exception) { return Url; } } /// <summary> /// /// </summary> /// <param name="text"></param> /// <returns></returns> public static string ConvertMessageToHtml(this string text) { if (string.IsNullOrEmpty(text)) { return string.Empty; } var UsernameExpression = new Regex(@"^(@[a-zA-Z_0-9]*)|(\s@[a-zA-Z_0-9]*)|(\s@[a-zA-Z_0-9]*)$", RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline); var _html = UsernameExpression.Replace(text, match => string.Format("{1}@<a href='/{0}'>{0}</a>", match.ToString().Trim().Substring(1), (match.ToString().StartsWith("@") ? "" : " "))); var UrlExpression = new Regex(@"((http|ftp|https):\/\/)?[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?", RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline); _html = UrlExpression.Replace(_html, match => MakeTinyUrl(match.ToString())); _html = UrlExpression.Replace(_html, match => string.Format("<a href='{0}' target='_blank'>{1}</a>", match.ToString().ToLower().StartsWith("http") ? match.ToString() : string.Format("http://{0}", match.ToString()), match.ToString())); //var topExpression = new Regex(@"#\w{0,10}#", RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline); //_html = topExpression.Replace(_html, // match => // string.Format("<a href='{0}'>{1}</a>", // System.Web.HttpUtility.UrlPathEncode(match.ToString().Trim().Trim('#')), // match.ToString())); // _html = _html.Replace("'", "\""); return _html; } #region 字符串进行编码 /// <summary> /// 把字符串转换成BASE64 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string EncodeBase64(this string str) { return Convert.ToBase64String(str.ToByteArray<System.Text.UTF8Encoding>()); } /// <summary> /// 把BASE64转换成字符串 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string DecodeBase64(this string str) { return System.Text.UTF8Encoding.ASCII.GetString(Convert.FromBase64String(str)); } /// <summary> /// 对URL字符串进行编码(UTF-8) /// </summary> /// <param name="url"></param> /// <returns></returns> public static string UrlEncode(this string url) { if (string.IsNullOrEmpty(url)) return string.Empty; return System.Web.HttpUtility.UrlEncode(url, System.Text.Encoding.UTF8); } /// <summary> /// 对URL字符串进行解码(UTF-8) /// </summary> /// <param name="str"></param> /// <returns></returns> public static string UrlDecode(this string str) { if (string.IsNullOrEmpty(str)) return string.Empty; return System.Web.HttpUtility.UrlDecode(str, System.Text.Encoding.UTF8); } #endregion #region 字符串转换为字节数 /// <summary> /// 字符串转换为字节数组 /// </summary> /// <typeparam name="encoding">编码</typeparam> /// <param name="str"></param> /// <returns></returns> public static byte[] ToByteArray<encoding>(this string str) where encoding : Encoding { Encoding enc = Activator.CreateInstance<encoding>(); return enc.GetBytes(str); } /// <summary> /// 字符串转换为字节数组（UTF8） /// </summary> /// <param name="str"></param> /// <returns></returns> public static byte[] ToByteArray(this string str) { return str.ToByteArray<System.Text.UTF8Encoding>(); } /// <summary> /// 字符串转换为字节序列（UTF8） /// </summary> /// <param name="str"></param> /// <returns></returns> public static Stream ToStream(this string str) { return str.ToStream<System.Text.UTF8Encoding>(); } /// <summary> /// 字符串转换为字节序列 /// </summary> /// <typeparam name="encoding">编码</typeparam> /// <param name="str"></param> /// <returns></returns> public static Stream ToStream<encoding>(this string str) where encoding : Encoding { byte[] bytes = str.ToByteArray<encoding>(); return new System.IO.MemoryStream(bytes); } #endregion #region 验证 /// <summary> /// 验证整数 /// </summary> /// <param name="input"></param> /// <returns></returns> public static bool IsValidNumber(this String input) { return ValidateString(input, @"^[1-9]{1}[0-9]{0,9}$"); } /// <summary> /// 验证是否日期 /// </summary> /// <param name="input"></param> /// <returns></returns> public static bool IsValidDate(this String input) { bool bValid = ValidateString(input, @"^[12]{1}(\d){3}[-][01]?(\d){1}[-][0123]?(\d){1}$"); return (bValid && input.CompareTo("1753-01-01") >= 0); } /// <summary> /// 验证EMAIL /// </summary> /// <param name="input"></param> /// <returns></returns> public static bool IsValidEmail(this String input) { return ValidateString(input, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"); } /// <summary> /// 验证EMAIL /// </summary> /// <param name="input"></param> /// <param name="expression"></param> /// <returns></returns> public static bool IsValidEmail(this String input, String expression) { if (string.IsNullOrEmpty(input)) return false; if (String.IsNullOrEmpty(expression)) { expression = @"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"; } return ValidateString(input, expression); } /// <summary> /// 验证是否手机号码 /// </summary> /// <param name="input"></param> /// <returns></returns> public static bool IsValidMobile(this String input) { if (string.IsNullOrEmpty(input)) return false; return ValidateString(input, "^0{0,1}(1[3-8])[0-9]{9}$"); } internal static Boolean ValidateString(String input, String expression) { Regex validator = new Regex(expression, RegexOptions.None); return validator.IsMatch(input); } #endregion #region 加密/解密 /// <summary> /// 对称密钥加密 /// </summary> /// <typeparam name="Algorithm"></typeparam> /// <param name="str"></param> /// <param name="key"></param> /// <returns></returns> public static string Encrypt<Algorithm>(this string str, string key) where Algorithm : SymmetricAlgorithm { return str.Encrypt<Algorithm, System.Text.UTF8Encoding>(key); } /// <summary> /// 对称密钥加密 /// </summary> /// <typeparam name="Algorithm"></typeparam> /// <typeparam name="StringEncoding"></typeparam> /// <param name="str"></param> /// <param name="key"></param> /// <returns></returns> public static string Encrypt<Algorithm, StringEncoding>(this string str, string key) where Algorithm : SymmetricAlgorithm where StringEncoding : Encoding { Stream s = new System.IO.MemoryStream(str.ToByteArray()); Stream encryptedStream = s.Encrypt<Algorithm>(key.ToByteArray()); byte[] bytes = encryptedStream.ToByteArray(); return Convert.ToBase64String(bytes); } /// <summary> /// 对称密钥解密 /// </summary> /// <typeparam name="Algorithm"></typeparam> /// <param name="str"></param> /// <param name="key"></param> /// <returns></returns> public static string Decrypt<Algorithm>(this string str, string key) where Algorithm : SymmetricAlgorithm { return str.Decrypt<Algorithm, System.Text.UTF8Encoding>(key); } /// <summary> /// 对称密钥解密 /// </summary> /// <typeparam name="Algorithm">对称加密算法</typeparam> /// <typeparam name="StringEncoding">字符编码</typeparam> /// <param name="str"></param> /// <param name="key"></param> /// <returns></returns> public static string Decrypt<Algorithm, StringEncoding>(this string str, string key) where Algorithm : SymmetricAlgorithm where StringEncoding : Encoding { Stream s = new System.IO.MemoryStream(Convert.FromBase64String(str)); Stream decryptedStream = s.Decrypt<Algorithm>(key.ToByteArray()); byte[] bytes = decryptedStream.ToByteArray(); return Activator.CreateInstance<StringEncoding>().GetString(bytes); } /// <summary> /// 不可逆加密 /// </summary> /// <typeparam name="Algorithm">加密HASH算法</typeparam> /// <typeparam name="StringEncoding">字符编码</typeparam> /// <param name="str"></param> /// <returns></returns> public static string EncryptOneWay<Algorithm, StringEncoding>(this string str) where Algorithm : HashAlgorithm where StringEncoding : Encoding { Encoding enco = Activator.CreateInstance<StringEncoding>(); byte[] inputBye = enco.GetBytes(str); byte[] bytes = Activator.CreateInstance<Algorithm>().ComputeHash(inputBye); return System.BitConverter.ToString(bytes).Replace("-", ""); ; } /// <summary> /// 不可逆加密 /// </summary> /// <typeparam name="Algorithm">加密HASH算法</typeparam> /// <param name="str">字符编码</param> /// <returns></returns> public static string EncryptOneWay<Algorithm>(this string str) where Algorithm : HashAlgorithm { return str.EncryptOneWay<Algorithm, System.Text.UTF8Encoding>(); } /// <summary> /// MD5编码 /// </summary> /// <param name="text"></param> /// <returns></returns> public static string MD5(this string text) { return text.EncryptOneWay<MD5CryptoServiceProvider, UTF8Encoding>().ToLower(); } public static string SHA512(this string text) { return text.EncryptOneWay<SHA512Cng, UTF8Encoding>(); } public static string SHA256(this string text) { return text.EncryptOneWay<SHA256Cng, UTF8Encoding>(); } #endregion /// <summary> /// 发送邮件方法 /// </summary> /// <param name="content">内容</param> /// <param name="title">标题</param> /// <param name="from">发送方</param> /// <param name="to">接收方</param> /// <returns></returns> public static bool SendEmail(this string content, string title, string from, string to) { SmtpClient _smtpClient = new SmtpClient(); _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式 _smtpClient.Host =Framework.Helper.Config.Instance.GetAppSetting<string>("mail-Host", "smtp.126.com");//指定SMTP服务器 string _userName =Framework.Helper.Config.Instance.GetAppSetting<string>("mail-userName", "******@126.com"); string _userPwd =Framework.Helper.Config.Instance.GetAppSetting<string>("mail-userPwd", "******"); _smtpClient.Credentials = new System.Net.NetworkCredential(_userName, _userPwd);//用户名和密码 MailMessage _mailMessage = new MailMessage(from, to); _mailMessage.Subject = title;//主题 _mailMessage.Body = content;//内容 _mailMessage.BodyEncoding = System.Text.Encoding.UTF8;//正文编码 _mailMessage.IsBodyHtml = true;//设置为HTML格式 _mailMessage.Priority = MailPriority.High;//优先级 try { _smtpClient.Send(_mailMessage); return true; } catch (Exception ex) { return false; } } } }