csharp:search and Compare string

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/// <summary>        /// 涂聚文        /// 2011 捷为工作室        /// 缔友计算机信息技术有限公司        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Page_Load(object sender, EventArgs e)        {            this.Page.Title = "字符串操作";              StringBuilder search =new StringBuilder();            //查找以a字母至多5个字符放在匹配字边界            string text = @"This comprehensive compendium provides a broad and thorough investigation of all aspects of programming with asp.net. entity revised and updated for the 3.5 release of .net, this book will give you the information you need to master asp.net and build a dynamic, successful,enterprsie web application.";            string pattern = @"\ba";//\b字边界，\B 不是字边界的位界 这是特殊字符或转义序列            MatchCollection matches = Regex.Matches(text, pattern, RegexOptions.IgnoreCase);            //WriteMatches(text, matches);            Response.Write("Original text was:" + text + "<br/>");            Response.Write("No.of matches:" + matches.Count.ToString() + "<br/>");            foreach (Match nextMatch in matches)            {                int Index = nextMatch.Index;                string result = nextMatch.ToString();                int charsBefore = (Index < 5) ? Index : 5;                int formEnd = text.Length - Index - result.Length;                int charsAfter = (formEnd < 5) ? formEnd : 5;                int charsToDisplay = charsBefore + charsAfter + result.Length;                //Console.WriteLine("index:{0},\t string:{i},\t {2}", Index, result, text.Substring(Index - charsBefore, charsToDisplay));                Response.Write("Index:" + Index);                Response.Write(",  String:" + result);                Response.Write(",..." + text.Substring(Index - charsBefore, charsToDisplay).Replace("a", "<font color=red>a</font>") + "...<br/>");                  search.Append(text.Substring(Index - charsBefore, charsToDisplay).Replace("a", "<font color=red>a</font>"));              }            #region 得出结果            /*             No.of matches:10            Index:39, String:a,ides a broa            Index:47, String:a,road and th            Index:77, String:a,n of all as            Index:81, String:a, all aspect            Index:109, String:a,with asp.ne            Index:133, String:a,ised and up            Index:233, String:a,ster asp.ne            Index:241, String:a,.net and bu            Index:251, String:a,uild a dyna            Index:288, String:a, web applic                             */            #endregion                         Response.Write(search.ToString());            Response.Write("...<br/>");            Response.Write(SeachText(text,"a",5, pattern));        }        /// <summary>        /// 搜索文章内容得到搜索关键字截取显示        /// </summary>        /// <param name="text"></param>        /// <param name="strword"></param>        /// <returns></returns>        private string SeachText(string text, string strword, int num, string pattern)        {            StringBuilder search = new StringBuilder();            //string text = @"This comprehensive compendium provides a broad and thorough investigation of all aspects of programming with asp.net. entity revised and updated for the 3.5 release of .net, this book will give you the information you need to master asp.net and build a dynamic, successful,enterprsie web application.";            //string pattern = @"\ba";//\b字边界，\B 不是字边界的位界 这是特殊字符或转义序列            MatchCollection matches = Regex.Matches(text, pattern, RegexOptions.IgnoreCase);            //Response.Write("Original text was:" + text + "<br/>");            //Response.Write("No.of matches:" + matches.Count.ToString() + "<br/>");            foreach (Match nextMatch in matches)            {                int Index = nextMatch.Index;                string result = nextMatch.ToString();                int charsBefore = (Index < num) ? Index : num;                int formEnd = text.Length - Index - result.Length;                int charsAfter = (formEnd < num) ? formEnd : num;                int charsToDisplay = charsBefore + charsAfter + result.Length;                //Console.WriteLine("index:{0},\t string:{i},\t {2}", Index, result, text.Substring(Index - charsBefore, charsToDisplay));                //Response.Write("Index:" + Index);                //Response.Write(",  String:" + result);                //Response.Write(",..." + text.Substring(Index - charsBefore, charsToDisplay).Replace(strword, "<font color=red>a</font>") + "...<br/>");                string reword ="<span style='color:#FF0000;'>"+ strword +"</span>";// "<font color=red>" + strword + "</font>";                search.Append(text.Substring(Index - charsBefore, charsToDisplay).Replace(strword, reword));              }            return search.ToString();          }        /// <summary>        /// 首先是前台调用：strBuilder.Append ( GetLogExtract ( LogText, WordNum, LogUrl ) );        /// </summary>        /// <param name="LogText"></param>        /// <param name="WordNum"></param>        /// <param name="LogUrl"></param>        /// <returns></returns>        public string GetLogExtract ( string LogText, int WordNum, string LogUrl )        {            string LogExtract=LogText;            if ( LogText.IndexOf ( "#此前内容作为摘要#" )>0 )            {                LogExtract = LogText.Substring ( 0, LogText.IndexOf ( "#此前内容作为摘要#" ) ) + "……<a href=\""+LogUrl+"\">阅读全文>>></a>";            }            else            {                int Contentlen = GetStrLength ( LogText );                if ( Contentlen <= WordNum )                {                    LogExtract = LogText;                }                else                {                    if ( LogText.LastIndexOf ( "<object" ) >0 || LogText.LastIndexOf ( "<OBJECT" ) >0 )                    {                        if ( WordNum <100 )                        {                            LogExtract="";                        }                        else                        {                            LogExtract = WipeOffTableHTML ( LogText );                        }                    }                    else                    {                        LogExtract = InterceptStr (WipeOffTableHTML ( LogText ), WordNum+100 );                        if ( LogExtract.LastIndexOf ( "<p" )>0 && (LogExtract.Length - LogExtract.LastIndexOf ( "<p" ))<400 )                        {                            LogExtract = LogExtract.Substring ( 0, LogExtract.LastIndexOf ( "<p" ) -1 );                        }                        else if ( LogExtract.LastIndexOf ( "<img" )>0 && (LogExtract.Length - LogExtract.LastIndexOf ( "<img" ))<400 )                        {                            LogExtract = LogExtract.Substring ( 0, LogExtract.LastIndexOf ( "<img" ) -1 );                        }                        else if ( LogExtract.LastIndexOf ( "。" )>0 && (LogExtract.Length - LogExtract.LastIndexOf ( "。" ))<400 )                        {                            LogExtract = LogExtract.Substring ( 0, LogExtract.LastIndexOf ( "。" ) );                        }                        else if ( LogExtract.LastIndexOf ( "<br" )>0 && (LogExtract.Length - LogExtract.LastIndexOf ( "<br" ))<400 )                        {                            LogExtract = LogExtract.Substring ( 0, LogExtract.LastIndexOf ( "<br" ) -1 );                        }                        else if ( LogExtract.LastIndexOf ( "?" )>0 && (LogExtract.Length - LogExtract.LastIndexOf ( "?" ))<400 )                        {                            LogExtract = LogExtract.Substring ( 0, LogExtract.LastIndexOf ( "?" ) );                        }                        LogExtract += "……<a href=\""+LogUrl+"\">阅读全文>>></a>";                    }                }            }            return LogExtract;        }            /// <summary>        /// 去除表格HTML标记        /// </summary>        /// <param name="Htmlstring"></param>        /// <returns>去掉表格HTML标记后的文本</returns>        public static string WipeOffTableHTML(string Htmlstring)        {            //删除脚本            Htmlstring = Regex.Replace(Htmlstring, @"<[^>]*?>.*?</>", "", RegexOptions.IgnoreCase);            //删除表格HTML            Htmlstring = Regex.Replace(Htmlstring, @"</?table[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"</?tr[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"</?td[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"</?th[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"</?BLOCKQUOTE[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"</?tbody[^>]*>", "", RegexOptions.IgnoreCase);            Htmlstring = Regex.Replace(Htmlstring, @"<style[^\s]*", "", RegexOptions.IgnoreCase);              return Htmlstring;        }        /// <summary>        ///        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        public static int GetStrLength(string str)        {            bool WINNT_CHINESE = ("中国".Length == 2);            if (WINNT_CHINESE)            {                int L, T, C;                L = str.Length;                T = L;                for (int i = 1; i <= L; i++)                {                    Encoding ASCII = Encoding.ASCII;                    Byte[] EncodedBytes = ASCII.GetBytes(str.Substring(i - 1, 1));                    C = EncodedBytes[0];                    if (C < 0)                        C += 65536;                    if (C > 255)                        T += 1;                }                return T;            }            else            {                return str.Length;            }        }          /// <summary>        ///        /// </summary>        /// <param name="str"></param>        /// <param name="length"></param>        /// <returns></returns>        public static string InterceptStr(string str, int length)        {            int x, y;            str = str.Trim();            x = str.Length;            y = 0;            if (x >= 1)            {                for (int i = 1; i <= x; i++)                {                    Encoding ASCII = Encoding.ASCII;                    Byte[] EncodedBytes = ASCII.GetBytes(str.Substring(i - 1, 1));                    if (EncodedBytes[0] < 0 || EncodedBytes[0] > 255)                    {                        y += 2;                    }                    else                    {                        y += 1;                    }                    if (y >= length)                    {                        str = str.Substring(0, i);                        break;                    }                }                return str;            }            else            {                return "";            }        }

 

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/// <summary>        /// 去除重复的字符        /// </summary>        /// <param name="source">原字符串</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveRepeatString(string source)        {            string s = string.Empty;                      s = Regex.Replace(source, "(?s)(.)(?=.*\\1)", "");            return s;        }        /// <summary>        /// 去除重复的字符        /// </summary>        /// <param name="source"></param>        /// <returns></returns>        private string getRemoveString(string source)        {            string str = string.Empty;            ArrayList Alist = new ArrayList();            foreach (char ch in source.ToCharArray())            {                if (!Alist.Contains(ch))                {                    Alist.Add(ch);                }            }            foreach (object o in Alist)            {                str = str + o.ToString();            }            return str;        }          /// <summary>        /// 去除有分割符号重复的字串        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="key">分割字符</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveArryString(string source,char key)        {            string str = string.Empty;            Array stringArray = source.Split(key);            List<string> listString = new List<string>();            //遍历删除重复项            foreach (string eachString in stringArray)            {                  if (!listString.Contains(eachString))                      listString.Add(eachString);              }            //遍历输出            foreach (string string1 in listString)            //测试值            { str = str + string1 + key; }              str = str.Substring(0, str.Length - 1);            return str;        }        /// <summary>        /// 去除有分割符号重复的字符重复的字串        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="key">分割字符</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveArryStringR(string source,string key)        {            string str = string.Empty;              source = Regex.Replace(source + key, @"(?:([^,]+,))(?=.*?\1)", "");            str = source.Substring(0, source.Length - 1);            return str;        }        /// <summary>        /// 去除有分割符号重复的字串        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="key">分割字符</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveArryStringJ(string source, char key)        {            string str = string.Empty;            str = string.Join(",", source.Split(key).Distinct().ToArray());            return str;        }        /// <summary>        /// 去除有分割符号重复的字串        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="key">分割字符</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveArryStringD(string source, char key)        {            string str = string.Empty;            Array stringArray = source.Split(key);            List<string> listString = new List<string>();            foreach (string eachString in stringArray)            {                listString.Add(eachString);            }            listString = listString.Distinct().ToList();            str = String.Join(",", listString.ToArray());            return str;        }        /// <summary>        /// 去除有分割符号重复的字串        /// LINQ        /// </summary>        /// <param name="source">原字符串</param>        /// <param name="key">分割字符</param>        /// <returns>返回无重复的字符串</returns>        private string getRemoveArryStringL(string source, char key)        {            string str = string.Empty;            Array stringArray = source.Split(key);            List<string> listString = new List<string>();            foreach (string eachString in stringArray)            {                listString.Add(eachString);            }            List<string> strDistinct = new List<string>();            IEnumerable<string> whoLoggedIn =                  listString.Where(logEntry => logEntry.Length < 15).Distinct();  //logEntry.Length<10            foreach (string who in whoLoggedIn)            {                strDistinct.Add(who);            }            str = String.Join(",", strDistinct.ToArray());            return str;        }

　　http://blogs.msdn.com/b/kcwalina/archive/2004/06/22/162533.aspx 

http://www.dotblogs.com.tw/puma/archive/2009/05/28/asp.net-generic-list-sort-find-findall-exsit.aspx#12190

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/// <summary>     ///     /// </summary>     public class Person     {         private int _ID;         private string _Name;         private int _Age;           public Person(int ID, string Name, int Age)         {             _ID = ID;             _Name = Name;             _Age = Age;         }           public int ID         {             set { _ID = value; }             get { return _ID; }         }           public string Name         {             set { _Name = value; }             get { return _Name; }         }           public int Age         {             set { _Age = value; }             get { return _Age; }         }           public override string ToString()         {             return string.Format("ID：{0}，Name：{1}，Age：{2}", _ID, _Name, _Age);         }     }      string str = string.Empty;             List<string> strout = new List<string>();               List<Person> lstPerson = new List<Person>();             lstPerson.Add(new Person(1, "puma", 10));             lstPerson.Add(new Person(2, "F6 Team", 20));             lstPerson.Add(new Person(3, "ASP.NET", 30));             lstPerson.Add(new Person(4, "Dotblogs", 40));                   //List<T>.Find()             //找出Name='puma'的Person             str="找出Name='puma'的Person→ ";             str=str+lstPerson.Find(delegate(Person p) { return p.Name == "puma"; }).ToString() + "<p>";                   //List<T>.FindAll()             //找出Age>10的數目             str="找出Age>10的數目→ ";             str=lstPerson.FindAll(delegate(Person p) { return p.Age > 10; }).Count.ToString() + "<p>";                   //List<T>.Exists()             //檢查Name='F6'是否存在             str="檢查Name='F6'是否存在→ ";             str=lstPerson.Exists(delegate(Person p) { return p.Name == "F6"; }).ToString() + "<p>";                   //List<T>.Sort()             //依Name升冪排序             str="<p>依Name升冪排序↑<br/>";             lstPerson.Sort(delegate(Person p1, Person p2) { return Comparer<string>.Default.Compare(p1.Name, p2.Name); });             foreach (Person p in lstPerson)             {                 strout.Add(p.ToString() + "<br/>");             }             str = str + String.Join(",", strout.ToArray());                 //List<T>.Sort()             //依Name降冪排序             str="<p>依Name降冪排序↓<br/>";             lstPerson.Sort(delegate(Person p1, Person p2) { return Comparer<string>.Default.Compare(p2.Name, p1.Name); });             foreach (Person p in lstPerson)             {                 strout.Add(p.ToString() + "<br/>");             }               str = str + String.Join(",", strout.ToArray());

　　

 

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/// <summary>     ///     /// </summary>     public Form1()     {         InitializeComponent();     }     /// <summary>     ///     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     private void Form1_Load(object sender, EventArgs e)     {         string a = @"E:\geovindu\k\国家\dd\FName.jpg";         //或者 a=System.IO.Path.GetFileName(a);         string []arr=a.Split('\\');         a=arr[arr.Length-1].Split('.')[0];         //MessageBox.Show("file:" + a);         List<string> sk = new List<string>();         string str1="我**是*****涂*****聚*****文*****啊";         string[] str2 = System.Text.RegularExpressions.Regex.Split(str1,@"[*]+");         foreach(string i in str2)         sk.Add(i.ToString());         string sks = string.Empty;         string skf = string.Empty;         int c = 1;         foreach (var ss in sk)         {               if (c >= 2)             {                 skf = skf + "," + ss;             }             else             {                 skf = skf + ss;             }             c++;         }         this.textBox2.Text = getStrWhere(skf,"geovindu",',');         sks = getListWhere(sk, "geovindu");         //MessageBox.Show(sks);         this.textBox1.Text = sks;       }       /// <summary>     ///     /// </summary>     /// <param name="filedlist"></param>     /// <param name="strkey"></param>     /// <param name="stroption"></param>     /// <returns></returns>     private string getStrWhere(string filedlist, string strkey, string stroption)     {         string str = string.Empty;         if (!string.IsNullOrEmpty(strkey))         {             int i = 1;             string[] resultString = Regex.Split(filedlist, stroption, RegexOptions.IgnoreCase);             string[] str2 = System.Text.RegularExpressions.Regex.Split(filedlist, @"[,]+");  //多个，连在一起也可以分割             string[] split = filedlist.Split(new Char[] { ',' });             foreach (var s in split)             {                   if (i >= 2)                 {                     str = str + "  or " + s + " like '%" + strkey + "%'";                 }                 else                 {                     str = str + " " + s + " like '%" + strkey + "%'";                 }                 i++;             }         }         return str;     }         /// <summary>     ///     /// </summary>     /// <param name="filedlist"></param>     /// <param name="strkey"></param>     /// <returns></returns>     private string getStrWhere(string filedlist, string strkey, char stroption)     {         string str = string.Empty;         if (!string.IsNullOrEmpty(strkey))         {             int i = 1;             string[] resultString = Regex.Split(filedlist, ",", RegexOptions.IgnoreCase);             string[] str2 = System.Text.RegularExpressions.Regex.Split(filedlist, @"[,]+");  //多个，连在一起也可以分割             string[] split = filedlist.Split(new Char[] { stroption });             foreach (var s in split)             {                                   if (i >= 2)                 {                     str = str + "  or " + s + " like '%" + strkey + "%'";                 }                 else                 {                     str = str + " " + s + " like '%" + strkey + "%'";                 }                 i++;             }         }         return str;     }       /// <summary>     /// 2016-05-26     /// geovindu     /// </summary>     /// <param name="fileidlist"></param>     /// <param name="strkye"></param>     /// <returns></returns>     private string getListWhere(List<string> fileidlist, string strkey)     {         int i = 1;         string str = string.Empty;         foreach (var s in fileidlist)         {                           if (i >= 2)             {                 str = str + "  or " + s + " like '%" + strkey + "%'";             }             else             {                 str = str + " " + s + " like '%" + strkey + "%'";             }             i++;         }           return str;     } }