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107 lines
2.3 KiB
107 lines
2.3 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace System
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{
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public static class StringExtensions
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{
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/// <summary>
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/// 将字符串作为新List的第一个元素
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/// </summary>
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public static IList<string> AsFirstValueOfList(this string source)
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{
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var list = new List<string>();
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list.Add(source);
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return list;
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}
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public static bool IsNullOrEmpty(this string s)
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{
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return string.IsNullOrEmpty(s);
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}
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#region FormatWith:string.Format。后面三个方法，是为了提高效率而加的：比第一种方法效率高
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public static string FormatWith(this string format, params object[] args)
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{
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return string.Format(format, args);
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}
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public static string FormatWith(this string format, object arg0)
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{
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return string.Format(format, arg0);
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}
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public static string FormatWith(this string format, object arg0, object arg1)
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{
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return string.Format(format, arg0, arg1);
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}
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public static string FormatWith(this string format, object arg0, object arg1, object arg2)
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{
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return string.Format(format, arg0, arg1, arg2);
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}
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#endregion
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public static bool IsMatch(this string s, string pattern)
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{
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if (s == null)
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return false;
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else
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return Regex.IsMatch(s, pattern);
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}
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public static string Match(this string s, string pattern)
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{
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if (s == null)
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return "";
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return Regex.Match(s, pattern).Value;
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}
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public static bool IsInt(this string s)
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{
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int i;
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return int.TryParse(s, out i);
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}
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public static int ToInt(this string s)
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{
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return int.Parse(s);
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}
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/// <summary>
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/// 首字母转换成小写
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/// </summary>
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public static string ToCamel(this string s)
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{
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if (s.IsNullOrEmpty())
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return s;
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return s[0].ToString().ToLower() + s.Substring(1);
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}
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/// <summary>
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/// 首字母转换成大写
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/// </summary>
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public static string ToPascal(this string s)
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{
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if (s.IsNullOrEmpty())
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return s;
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return s[0].ToString().ToUpper() + s.Substring(1);
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}
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public static string ToUnicodeString(this byte[] arr)
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{
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return System.Text.Encoding.Unicode.GetString(arr);
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}
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public static byte[] EncodeUnicodePwd(this string password)
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{
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using (var md5 = MD5.Create())
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return md5.ComputeHash(Encoding.Unicode.GetBytes(password));
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}
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}
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}
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