C# StringHelper

简介: using System; using System.Collections.Generic; using System.Text; using System.

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace DotNet.Utilities
{
    /// <summary>
    /// 字符串操作类
    /// 1、GetStrArray(string str, char speater, bool toLower)  把字符串按照分隔符转换成 List
    /// 2、GetStrArray(string str) 把字符串转 按照, 分割 换为数据
    /// 3、GetArrayStr(List list, string speater) 把 List 按照分隔符组装成 string
    /// 4、GetArrayStr(List list)  得到数组列表以逗号分隔的字符串
    /// 5、GetArrayValueStr(Dictionary<int, int> list)得到数组列表以逗号分隔的字符串
    /// 6、DelLastComma(string str)删除最后结尾的一个逗号
    /// 7、DelLastChar(string str, string strchar)删除最后结尾的指定字符后的字符
    /// 8、ToSBC(string input)转全角的函数(SBC case)
    /// 9、ToDBC(string input)转半角的函数(SBC case)
    /// 10、GetSubStringList(string o_str, char sepeater)把字符串按照指定分隔符装成 List 去除重复
    /// 11、GetCleanStyle(string StrList, string SplitString)将字符串样式转换为纯字符串
    /// 12、GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)将字符串转换为新样式
    /// 13、SplitMulti(string str, string splitstr)分割字符串
    /// 14、SqlSafeString(string String, bool IsDel)
    /// </summary>
    public class StringHelper
    {
        /// <summary>
        /// 把字符串按照分隔符转换成 List
        /// </summary>
        /// <param name="str">源字符串</param>
        /// <param name="speater">分隔符</param>
        /// <param name="toLower">是否转换为小写</param>
        /// <returns></returns>
        public static List<string> GetStrArray(string str, char speater, bool toLower)
        {
            List<string> list = new List<string>();
            string[] ss = str.Split(speater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != speater.ToString())
                {
                    string strVal = s;
                    if (toLower)
                    {
                        strVal = s.ToLower();
                    }
                    list.Add(strVal);
                }
            }
            return list;
        }
        /// <summary>
        /// 把字符串转 按照, 分割 换为数据
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string[] GetStrArray(string str)
        {
            return str.Split(new Char[] { ',' });
        }
        /// <summary>
        /// 把 List<string> 按照分隔符组装成 string
        /// </summary>
        /// <param name="list"></param>
        /// <param name="speater"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<string> list, string speater)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i]);
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(speater);
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<int> list)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i].ToString());
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(",");
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayValueStr(Dictionary<int, int> list)
        {
            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<int, int> kvp in list)
            {
                sb.Append(kvp.Value + ",");
            }
            if (list.Count > 0)
            {
                return DelLastComma(sb.ToString());
            }
            else
            {
                return "";
            }
        }


        #region 删除最后一个字符之后的字符

        /// <summary>
        /// 删除最后结尾的一个逗号
        /// </summary>
        public static string DelLastComma(string str)
        {
            return str.Substring(0, str.LastIndexOf(","));
        }

        /// <summary>
        /// 删除最后结尾的指定字符后的字符
        /// </summary>
        public static string DelLastChar(string str, string strchar)
        {
            return str.Substring(0, str.LastIndexOf(strchar));
        }

        #endregion

 


        /// <summary>
        /// 转全角的函数(SBC case)
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string ToSBC(string input)
        {
            //半角转全角:
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        /// <summary>
        ///  转半角的函数(SBC case)
        /// </summary>
        /// <param name="input">输入</param>
        /// <returns></returns>
        public static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        /// <summary>
        /// 把字符串按照指定分隔符装成 List 去除重复
        /// </summary>
        /// <param name="o_str"></param>
        /// <param name="sepeater"></param>
        /// <returns></returns>
        public static List<string> GetSubStringList(string o_str, char sepeater)
        {
            List<string> list = new List<string>();
            string[] ss = o_str.Split(sepeater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != sepeater.ToString())
                {
                    list.Add(s);
                }
            }
            return list;
        }


        #region 将字符串样式转换为纯字符串
        /// <summary>
        ///  将字符串样式转换为纯字符串
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="SplitString"></param>
        /// <returns></returns>
        public static string GetCleanStyle(string StrList, string SplitString)
        {
            string RetrunValue = "";
            //如果为空,返回空值
            if (StrList == null)
            {
                RetrunValue = "";
            }
            else
            {
                //返回去掉分隔符
                string NewString = "";
                NewString = StrList.Replace(SplitString, "");
                RetrunValue = NewString;
            }
            return RetrunValue;
        }
        #endregion

        #region 将字符串转换为新样式
        /// <summary>
        /// 将字符串转换为新样式
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="NewStyle"></param>
        /// <param name="SplitString"></param>
        /// <param name="Error"></param>
        /// <returns></returns>
        public static string GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)
        {
            string ReturnValue = "";
            //如果输入空值,返回空,并给出错误提示
            if (StrList == null)
            {
                ReturnValue = "";
                Error = "请输入需要划分格式的字符串";
            }
            else
            {
                //检查传入的字符串长度和样式是否匹配,如果不匹配,则说明使用错误。给出错误信息并返回空值
                int strListLength = StrList.Length;
                int NewStyleLength = GetCleanStyle(NewStyle, SplitString).Length;
                if (strListLength != NewStyleLength)
                {
                    ReturnValue = "";
                    Error = "样式格式的长度与输入的字符长度不符,请重新输入";
                }
                else
                {
                    //检查新样式中分隔符的位置
                    string Lengstr = "";
                    for (int i = 0; i < NewStyle.Length; i++)
                    {
                        if (NewStyle.Substring(i, 1) == SplitString)
                        {
                            Lengstr = Lengstr + "," + i;
                        }
                    }
                    if (Lengstr != "")
                    {
                        Lengstr = Lengstr.Substring(1);
                    }
                    //将分隔符放在新样式中的位置
                    string[] str = Lengstr.Split(',');
                    foreach (string bb in str)
                    {
                        StrList = StrList.Insert(int.Parse(bb), SplitString);
                    }
                    //给出最后的结果
                    ReturnValue = StrList;
                    //因为是正常的输出,没有错误
                    Error = "";
                }
            }
            return ReturnValue;
        }
        #endregion

        /// <summary>
        /// 分割字符串
        /// </summary>
        /// <param name="str"></param>
        /// <param name="splitstr"></param>
        /// <returns></returns>
        public static string[] SplitMulti(string str, string splitstr)
        {
            string[] strArray = null;
            if ((str != null) && (str != ""))
            {
                strArray = new Regex(splitstr).Split(str);
            }
            return strArray;
        }
        public static string SqlSafeString(string String, bool IsDel)
        {
            if (IsDel)
            {
                String = String.Replace("'", "");
                String = String.Replace("\"", "");
                return String;
            }
            String = String.Replace("'", "&#39;");
            String = String.Replace("\"", "&#34;");
            return String;
        }

        #region 获取正确的Id,如果不是正整数,返回0
        /// <summary>
        /// 获取正确的Id,如果不是正整数,返回0
        /// </summary>
        /// <param name="_value"></param>
        /// <returns>返回正确的整数ID,失败返回0</returns>
        public static int StrToId(string _value)
        {
            if (IsNumberId(_value))
                return int.Parse(_value);
            else
                return 0;
        }
        #endregion
        #region 检查一个字符串是否是纯数字构成的,一般用于查询字符串参数的有效性验证。
        /// <summary>
        /// 检查一个字符串是否是纯数字构成的,一般用于查询字符串参数的有效性验证。(0除外)
        /// </summary>
        /// <param name="_value">需验证的字符串。。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool IsNumberId(string _value)
        {
            return QuickValidate("^[1-9]*[0-9]*$", _value);
        }
        #endregion
        #region 快速验证一个字符串是否符合指定的正则表达式。
        /// <summary>
        /// 快速验证一个字符串是否符合指定的正则表达式。
        /// </summary>
        /// <param name="_express">正则表达式的内容。</param>
        /// <param name="_value">需验证的字符串。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool QuickValidate(string _express, string _value)
        {
            if (_value == null) return false;
            Regex myRegex = new Regex(_express);
            if (_value.Length == 0)
            {
                return false;
            }
            return myRegex.IsMatch(_value);
        }
        #endregion


        #region 根据配置对指定字符串进行 MD5 加密
        /// <summary>
        /// 根据配置对指定字符串进行 MD5 加密
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string GetMD5(string s)
        {
            //md5加密
            s = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(s, "md5").ToString();

            return s.ToLower().Substring(8, 16);
        }
        #endregion

        #region 得到字符串长度,一个汉字长度为2
        /// <summary>
        /// 得到字符串长度,一个汉字长度为2
        /// </summary>
        /// <param name="inputString">参数字符串</param>
        /// <returns></returns>
        public static int StrLength(string inputString)
        {
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;
            }
            return tempLen;
        }
        #endregion

        #region 截取指定长度字符串
        /// <summary>
        /// 截取指定长度字符串
        /// </summary>
        /// <param name="inputString">要处理的字符串</param>
        /// <param name="len">指定长度</param>
        /// <returns>返回处理后的字符串</returns>
        public static string ClipString(string inputString, int len)
        {
            bool isShowFix = false;
            if (len % 2 == 1)
            {
                isShowFix = true;
                len--;
            }
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            string tempString = "";
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;

                try
                {
                    tempString += inputString.Substring(i, 1);
                }
                catch
                {
                    break;
                }

                if (tempLen > len)
                    break;
            }

            byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
            if (isShowFix && mybyte.Length > len)
                tempString += "…";
            return tempString;
        }
        #endregion

 

        #region HTML转行成TEXT
        /// <summary>
        /// HTML转行成TEXT
        /// </summary>
        /// <param name="strHtml"></param>
        /// <returns></returns>
        public static string HtmlToTxt(string strHtml)
        {
            string[] aryReg ={
            @"<script[^>]*?>.*?</script>",
            @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
            @"([\r\n])[\s]+",
            @"&(quot|#34);",
            @"&(amp|#38);",
            @"&(lt|#60);",
            @"&(gt|#62);",
            @"&(nbsp|#160);",
            @"&(iexcl|#161);",
            @"&(cent|#162);",
            @"&(pound|#163);",
            @"&(copy|#169);",
            @"&#(\d+);",
            @"-->",
            @"<!--.*\n"
            };

            string newReg = aryReg[0];
            string strOutput = strHtml;
            for (int i = 0; i < aryReg.Length; i++)
            {
                Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);
                strOutput = regex.Replace(strOutput, string.Empty);
            }

            strOutput.Replace("<", "");
            strOutput.Replace(">", "");
            strOutput.Replace("\r\n", "");


            return strOutput;
        }
        #endregion

        #region 判断对象是否为空
        /// <summary>
        /// 判断对象是否为空,为空返回true
        /// </summary>
        /// <typeparam name="T">要验证的对象的类型</typeparam>
        /// <param name="data">要验证的对象</param>       
        public static bool IsNullOrEmpty<T>(T data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }

        /// <summary>
        /// 判断对象是否为空,为空返回true
        /// </summary>
        /// <param name="data">要验证的对象</param>
        public static bool IsNullOrEmpty(object data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }
        #endregion
    }
}

相关文章
|
7月前
|
存储 算法 程序员
实现一个malloc内存分配器(图文并茂)
实现一个malloc内存分配器(图文并茂)
101506 0
【C++】类与对象(三) 运算符重载 赋值重载 取地址及const取地址操作符重载(1)
【C++】类与对象(三) 运算符重载 赋值重载 取地址及const取地址操作符重载
|
NoSQL 关系型数据库 MongoDB
数据排序|学习笔记
快速学习数据排序
|
Ruby
Ruby(3):基本语法中
字符串分割成数组: 可以使用先scan再join的方法,当然其实有更好的 split方法,专门用来分割字符串 1 # 在Ruby中,如果不使用inspect,直接使用puts输出数组,那么每个元素会占用一行输出 2 irb(main):001:0> puts "Short sentence.
881 0
|
4天前
|
人工智能 自动驾驶 大数据
预告 | 阿里云邀您参加2024中国生成式AI大会上海站,马上报名
大会以“智能跃进 创造无限”为主题,设置主会场峰会、分会场研讨会及展览区,聚焦大模型、AI Infra等热点议题。阿里云智算集群产品解决方案负责人丛培岩将出席并发表《高性能智算集群设计思考与实践》主题演讲。观众报名现已开放。
|
21天前
|
存储 人工智能 弹性计算
阿里云弹性计算_加速计算专场精华概览 | 2024云栖大会回顾
2024年9月19-21日,2024云栖大会在杭州云栖小镇举行,阿里云智能集团资深技术专家、异构计算产品技术负责人王超等多位产品、技术专家,共同带来了题为《AI Infra的前沿技术与应用实践》的专场session。本次专场重点介绍了阿里云AI Infra 产品架构与技术能力,及用户如何使用阿里云灵骏产品进行AI大模型开发、训练和应用。围绕当下大模型训练和推理的技术难点,专家们分享了如何在阿里云上实现稳定、高效、经济的大模型训练,并通过多个客户案例展示了云上大模型训练的显著优势。
|
24天前
|
存储 人工智能 调度
阿里云吴结生:高性能计算持续创新,响应数据+AI时代的多元化负载需求
在数字化转型的大潮中,每家公司都在积极探索如何利用数据驱动业务增长,而AI技术的快速发展更是加速了这一进程。
|
16天前
|
并行计算 前端开发 物联网
全网首发!真·从0到1!万字长文带你入门Qwen2.5-Coder——介绍、体验、本地部署及简单微调
2024年11月12日,阿里云通义大模型团队正式开源通义千问代码模型全系列,包括6款Qwen2.5-Coder模型,每个规模包含Base和Instruct两个版本。其中32B尺寸的旗舰代码模型在多项基准评测中取得开源最佳成绩,成为全球最强开源代码模型,多项关键能力超越GPT-4o。Qwen2.5-Coder具备强大、多样和实用等优点,通过持续训练,结合源代码、文本代码混合数据及合成数据,显著提升了代码生成、推理和修复等核心任务的性能。此外,该模型还支持多种编程语言,并在人类偏好对齐方面表现出色。本文为周周的奇妙编程原创,阿里云社区首发,未经同意不得转载。
11578 11