mirror of
https://github.com/nsnail/ns-ext.git
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442 lines
14 KiB
C#
442 lines
14 KiB
C#
// ReSharper disable UnusedMember.Global
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using System.Security.Cryptography;
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namespace NSExt.Extensions;
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public static class StringExtensions
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{
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/// <summary>
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/// base64编码
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/// </summary>
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/// <param name="me">待base64编码的字符串</param>
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/// <param name="e">字符串的编码方式</param>
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/// <returns>编码后的base64字符串</returns>
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public static string Base64(this string me, Encoding e)
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{
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return e.GetBytes(me).Base64();
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}
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/// <summary>
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/// base64解码
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/// </summary>
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/// <param name="me">待解码的字符串</param>
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/// <returns>解码后的原始字节数组</returns>
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public static byte[] Base64De(this string me)
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{
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return Convert.FromBase64String(me);
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}
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/// <summary>
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/// base64解码
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/// </summary>
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/// <param name="me">待解码的字符串</param>
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/// <param name="e">字符串的编码方式</param>
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/// <returns>解码后的原始字符串</returns>
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public static string Base64De(this string me, Encoding e)
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{
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return e.GetString(Base64De(me));
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}
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/// <summary>
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/// 将易于web传输的base64web字符串转换为原生base64
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/// </summary>
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/// <param name="me"></param>
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/// <returns>原生base64</returns>
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public static string Base64Sys(this string me)
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{
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return me.Replace("-", "+").Replace("_", "/").Replace(".", "=");
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}
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/// <summary>
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/// 将原生base64字符串转换成易于web传输的字符串
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/// </summary>
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/// <param name="me"></param>
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/// <returns>易于web传输的字符串</returns>
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public static string Base64Web(this string me)
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{
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return me.Replace("+", "-").Replace("/", "_").Replace("=", ".");
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}
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/// <summary>
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/// 将字符串转换成日期对象
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/// </summary>
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/// <param name="me">待转换字符串</param>
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/// <returns>转换后的日期对象</returns>
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public static DateTime DateTime(this string me)
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{
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return System.DateTime.Parse(me, CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 将字符串转换成日期对象
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/// </summary>
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/// <param name="me">待转换字符串</param>
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/// <param name="format">日期格式</param>
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/// <returns>转换后的日期对象</returns>
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public static DateTime DateTimeExact(this string me, string format)
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{
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return System.DateTime.ParseExact(me, format, CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 将字符串转换成日期对象
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/// </summary>
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/// <param name="me">待转换字符串</param>
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/// <param name="def">转换失败时返回的日期对象</param>
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/// <returns>转换后的日期对象</returns>
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public static DateTime DateTimeTry(this string me, DateTime def)
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{
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return !System.DateTime.TryParse(me, out var ret) ? def : ret;
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}
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/// <summary>
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/// 将字符串转换成日期对象
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/// </summary>
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/// <param name="me">待转换字符串</param>
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/// <param name="format">日期格式</param>
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/// <param name="def">转换失败时返回的日期对象</param>
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/// <returns>转换后的日期对象</returns>
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public static DateTime DateTimeExactTry(this string me, string format, DateTime def)
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{
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return !System.DateTime.TryParseExact(me, format, CultureInfo.CurrentCulture, DateTimeStyles.None, out var ret)
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? def
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: ret;
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}
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/// <summary>
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/// string to decimal
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/// </summary>
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/// <param name="me">string</param>
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/// <returns>decimal</returns>
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public static decimal Dec(this string me)
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{
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return decimal.Parse(me, CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 尝试将字符串转为decimal
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="def">转换失败后返回的默认值</param>
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/// <returns>转换后的decimal</returns>
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public static decimal DecTry(this string me, decimal def)
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{
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return !decimal.TryParse(me, out var ret) ? def : ret;
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}
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/// <summary>
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/// 将字符串转换成枚举对象
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="name"></param>
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/// <returns></returns>
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public static T Enum<T>(this string name) where T : Enum
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{
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return (T)System.Enum.Parse(typeof(T), name, true);
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}
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/// <summary>
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/// 将字符串转换成枚举对象
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="name"></param>
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/// <param name="def"></param>
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/// <returns></returns>
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public static T EnumTry<T>(this string name, T def) where T : Enum
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{
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return !System.Enum.TryParse(typeof(T), name, out var ret) ? def : (T)ret;
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}
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/// <summary>
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/// 将字符串转为guid
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/// </summary>
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/// <param name="me">字符串</param>
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/// <returns></returns>
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public static Guid Guid(this string me)
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{
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return System.Guid.Parse(me);
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}
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/// <summary>
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/// 将字符串转换成guid
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="def">转换失败的返回值</param>
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/// <returns></returns>
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public static Guid Guid(this string me, Guid def)
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{
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return System.Guid.TryParse(me, out var ret) ? ret : def;
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}
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/// <summary>
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/// 将字符串转换成字节数组形式
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="e">字符串使用的编码</param>
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/// <returns>字节数组</returns>
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public static byte[] Hex(this string me, Encoding e)
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{
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return e.GetBytes(me);
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}
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/// <summary>
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/// 解码html编码
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/// </summary>
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/// <param name="me">html编码后的字符串</param>
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/// <returns>解码后的原始字符串</returns>
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public static string HtmlDe(this string me)
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{
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return HttpUtility.HtmlDecode(me);
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}
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/// <summary>
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/// string to Int32
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/// </summary>
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/// <param name="me">string</param>
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/// <returns>Int32</returns>
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public static int Int32(this string me)
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{
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return int.Parse(me, CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 尝试将字符串转为int32
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="def">转换失败后返回的默认值</param>
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/// <returns>转换后的int32</returns>
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public static int Int32Try(this string me, int def)
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{
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return !int.TryParse(me, out var ret) ? def : ret;
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}
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/// <summary>
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/// string to Int64
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/// </summary>
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/// <param name="me">string</param>
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/// <returns>Int64</returns>
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public static long Int64(this string me)
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{
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return long.Parse(me, CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 尝试将字符串转为int64
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="def">转换失败后返回的默认值</param>
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/// <returns>转换后的int64</returns>
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public static long Int64Try(this string me, long def)
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{
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return !long.TryParse(me, out var ret) ? def : ret;
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}
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/// <summary>
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/// 将一个json字符串反序列化成为jObject对象
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/// </summary>
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/// <param name="me">字符串</param>
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/// <returns></returns>
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public static JObject JObject(this string me)
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{
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return Newtonsoft.Json.Linq.JObject.Parse(me);
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}
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public static string MaskChineseName(this string me)
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{
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if (me.Length == 2) return "*" + me[1..];
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return me[..1] + "*" + me[^1..];
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}
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/// <summary>
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/// 对一个手机号进行掩码处理
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/// </summary>
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/// <param name="me">手机号</param>
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/// <returns>掩码后的手机号</returns>
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public static string MaskMobile(this string me)
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{
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return new Regex(@"^(\d{3})\d{4}(\d{4})$").Replace(me, "$1****$2");
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}
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/// <summary>
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/// 对一个字符串进行sha1 hash运算
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="e">字符串使用的编码</param>
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/// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
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public static string Sha1(this string me, Encoding e)
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{
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using var sha1 = SHA1.Create();
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return BitConverter.ToString(sha1.ComputeHash(e.GetBytes(me)))
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.Replace("-", string.Empty)
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.ToLower(CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 对一个字符串进行sha1 hash运算
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/// </summary>
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/// <param name="me">对一个字符串进行sha1 hash运算</param>
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/// <param name="secret">密钥</param>
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/// <param name="e">使用的编码</param>
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/// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
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public static string HmacSha1(this string me, string secret, Encoding e)
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{
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using var hmacSha1 = new HMACSHA1(e.GetBytes(secret));
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return BitConverter.ToString(hmacSha1.ComputeHash(e.GetBytes(me)))
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.Replace("-", string.Empty)
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.ToLower(CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 对一个字符串进行md5hash运算
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="e">字符串使用的编码</param>
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/// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
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public static string Md5(this string me, Encoding e)
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{
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using var md5 = MD5.Create();
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return BitConverter.ToString(md5.ComputeHash(e.GetBytes(me)))
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.Replace("-", string.Empty)
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.ToLower(CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// MD5 hmac编码
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/// </summary>
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/// <param name="me">字符串</param>
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/// <param name="key">密钥</param>
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/// <param name="e">字符串使用的编码</param>
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/// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
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private static string Md5Hmac(this string me, string key, Encoding e)
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{
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using var md5Hmac = new HMACMD5(e.GetBytes(key));
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return BitConverter.ToString(md5Hmac.ComputeHash(e.GetBytes(me)))
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.Replace("-", string.Empty)
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.ToLower(CultureInfo.CurrentCulture);
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}
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/// <summary>
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/// 判断字符串是否为null或不存在子元素（如果为集合对象）；如果为空，返回指定的默认值，否则返回字符串本身
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/// </summary>
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/// <param name="me">指定字符串</param>
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/// <param name="defVal">指定的默认值</param>
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/// <returns>如果为空，返回指定的默认值，否则返回字符串本身</returns>
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public static string NullOrEmpty(this string me, string defVal)
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{
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return me.AsEnumerable().NullOrEmpty() ? defVal : me;
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}
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/// <summary>
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/// 反序列化一个文件获得指定类型的数据对象
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/// </summary>
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/// <param name="me">等待反序列化的json文本</param>
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/// <returns>反序列化后生成的对象</returns>
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public static T Object<T>(this string me)
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{
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return JsonConvert.DeserializeObject<T>(me);
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}
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/// <summary>
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/// 生成密码
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/// </summary>
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/// <param name="me">密码原文</param>
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/// <returns>密文</returns>
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public static string Pwd(this string me)
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{
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return me.Md5Hmac(me.Md5(Encoding.UTF8), Encoding.UTF8);
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}
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/// <summary>
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/// 移除字符串中的html标签
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/// </summary>
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/// <param name="me">字符串</param>
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/// <returns>处理之后的字符串</returns>
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public static string RemoveHtmlTag(this string me)
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{
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return new Regex(@"<[^>]*>").Replace(me, "");
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}
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/// <summary>
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/// 删除换行符
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/// </summary>
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/// <param name="me"></param>
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/// <returns></returns>
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public static string RemoveWrapped(this string me)
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{
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return me.Replace("\r", "").Replace("\n", "");
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}
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/// <summary>
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/// 截取指定长度的字符串，代替substring
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/// </summary>
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/// <param name="me"></param>
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/// <param name="startIndex"></param>
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/// <param name="length"></param>
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/// <returns></returns>
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public static string Sub(this string me, int startIndex, int length)
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{
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if (startIndex + length > me.Length) length = me.Length - startIndex;
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return me.Substring(startIndex, length);
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}
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/// <summary>
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/// 将连续多个空格替换成一个空格
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/// </summary>
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/// <param name="me"></param>
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/// <returns></returns>
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public static string TrimSpaces(this string me)
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{
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var ret = me.Replace(" ", " ");
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// ReSharper disable once TailRecursiveCall
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return ret == me ? ret : TrimSpaces(ret);
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}
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/// <summary>
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/// url编码
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/// </summary>
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/// <param name="me">字符串</param>
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/// <returns>url编码后的字符串</returns>
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public static string Url(this string me)
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{
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return Uri.EscapeDataString(me);
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}
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/// <summary>
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/// 解码url编码
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/// </summary>
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/// <param name="me">url编码后的字符串</param>
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/// <returns>解码后的原始字符串</returns>
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public static string UrlDe(this string me)
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{
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return Uri.UnescapeDataString(me);
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}
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public static int IpV4ToInt32(this string me)
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{
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return BitConverter.ToInt32(me.Split('.').Select(byte.Parse).Reverse().ToArray(), 0);
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}
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public static bool NullOrWhiteSpace(this string me)
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{
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return string.IsNullOrWhiteSpace(me);
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}
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}
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