非常实用的C#字符串操作处理类StringHelper.cs

/// <summary> /// 类说明：Assistant /// 编 码 人：苏飞 /// 联系方式：361983679  /// 更新网站：http://www.sufeinet.com/thread-655-1-1.html /// </summary> 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("'", "'");       String = String.Replace("/"", """);       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   } }