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;
}
}
}
}
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