C#自定义的字符串操作增强类实例

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 StringPlus
  {
    /// <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
  }
}