C#实现记事本查找与替换功能

#region =★*★*★= 〖查找替换〗的自定义变量 =★*★*★=  /// <summary> 获取或设置查找起始位置 </summary>  static int Index = 0;  /// <summary> 查找到的字符串数量 </summary>  static int count = 0;  /// <summary> 查找字符是否变更  static string strE = string.Empty;  /// <summary> 记录原始光标位置 </summary>  static int MemoIndex = -1;  /// <summary> 过度字符串变量 </summary>  static string str = string.Empty;  /// <summary> 实例化富文本 </summary>  static RichTextBox r = new RichTextBox();  #endregion

#region =★*★*★= FindUp() 查找指定〖字符 或 字符串〗 =★*★*★=  /// <summary>向上查找指定〖字符 或 字符串〗(不区分大小写)<para>　<para>   /// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型<para>   /// 参数2(str):用户指定要查找的字符串</para>   /// </para></para> </summary>   /// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>   /// <param name="str">用户指定要查找的字符串</param>   public static void FindUp(RichTextBox rtxt, string str)  {   if (strE != str)   {    rtxt.SelectionStart = rtxt.Text.Length;    strE = str;   }    Index = rtxt.SelectionStart;   Index = rtxt.Find(str, 0, Index, RichTextBoxFinds.Reverse);   if (Index >= 0)   {    rtxt.SelectionStart = Index;    rtxt.SelectionLength = str.Length;    count++;    rtxt.Focus();    myColor(rtxt);//设定关键字为颜色    if (Index <= 0)    {     seeks(str);     count = 0;    }   }   else if (Index < 0)   {    seeks(str);    count = 0;   }  }  #endregion

#region =★*★*★= FindDown() 查找指定〖字符 或 字符串〗=★*★*★=  /// <summary>向下 查找指定〖字符 或 字符串〗<para>　</para>   /// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型 <para></para>  /// 参数2(FindStr):用户指定要查找的字符串<para></para>  /// 参数3(TrueFales):bool 真:限定大小写 假:不分大小写</summary>  /// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>   /// <param name="FindStr">用户指定要查找的字符串</param>   /// <param name="TrueFales">bool 真:限定大小写 假:不分大小写</param>   public static void FindDown(RichTextBox rtxt, string FindStr,bool TrueFales)  {   if (TrueFales)    fileFindDownMax(rtxt, FindStr);   else    fileFindDownMin(rtxt, FindStr);  }  #endregion    #region =★*★*★= 简单的从上到下查找 =★*★*★=  /// <summary>向下查找指定〖字符 或 字符串〗(限定大小写)<para>　<para>   /// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型   /// <para>参数2(FindStr):用户指定要查找的字符串</para>   /// </para></para> </summary>   /// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>   /// <param name="FindStr">用户指定要查找的字符串</param>   private static void FindDownmax(RichTextBox rtxt, string FindStr)  {   Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.MatchCase);   if (Index < 0 || Index > rtxt.Text.Length)   {    seeks(FindStr);    count = 0;    Index = 0;   }   else   {    rtxt.Select(Index, FindStr.Length);    myColor(rtxt);//设定关键字为颜色    Index += FindStr.Length;    rtxt.Focus();   }  }   /// <summary>向下查找指定〖字符 或 字符串〗(不区分大小写)<para>　<para>   /// 参数1(rbox):内容文本框,指定为 RichTextBox 文本框类型   /// <para>参数2(FindStr):用户指定要查找的字符串</para>   /// </para></para> </summary>   /// <param name="rbox">内容文本框,指定为 RichTextBox 文本框类型</param>   /// <param name="FindStr">用户指定要查找的字符串</param>   private static void FindDownMin(RichTextBox rtxt, string FindStr)  {   Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.None);   if (Index < 0 || Index > rtxt.Text.Length)   {    seeks(FindStr);    count = 0;    Index = 0;   }   else   {    rtxt.Select(Index, FindStr.Length);    myColor(rtxt);//设定关键字为颜色    Index += FindStr.Length;    rtxt.Focus();   }  }  #endregion   //* 类似 VS 的查找方法 */  #region =★*★*★= 类似 VS 的查找方法 =★*★*★=  /// <summary> 类似 VS 的查找方法(不区分大小写向下查找)<para>　</para>  /// 参数1(txt):RichTextBox文本框<para></para>  /// 参数2(FindString):查找字符串</summary>  /// <param name="txt">RichTextBox文本框</param>  /// <param name="FindString">查找字符串</param>  private static void fileFindDownMax(RichTextBox rtxt, string FindString)  {   if (MemoIndex < 0)   {    MemoIndex = rtxt.SelectionStart;    if (MemoIndex > 10 && MemoIndex + FindString.Length <= rtxt.Text.Length)    {     str = rtxt.Text.Substring(0, MemoIndex + FindString.Length - 1);//截取光标位置 + 查找字符数 - 1 位数     Index = rtxt.SelectionStart;     r.Text = str;    }    else    {     str = rtxt.Text;     r.Text = rtxt.Text;     Index = rtxt.SelectionStart;    }   }   if (Index < str.Length - (FindString.Length - 1) && Index >= 0)   {    Index = r.Find(FindString, Index, RichTextBoxFinds.None);    if (Index < 0 || Index > r.Text.Length)    {     seeks(FindString);     count = 0;     Index = 0;     MemoIndex = -1;    }    else    {     rtxt.Select(Index, FindString.Length);     myColor(rtxt);//设定关键字为颜色     rtxt.Focus();     count++;      Index += FindString.Length;     if (Index > str.Length - FindString.Length)     {      seeks(FindString);      MemoIndex = -1;      Index = 0;      count = 0;     }    }   }   else if (Index < rtxt.Text.Length && Index >= 0)   {    Index = rtxt.Find(FindString, Index, RichTextBoxFinds.None);    if (Index == -1)//(Index >= txt.Text.Length && Index <= 0)    {     if (r.Text != "")     {      Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.None);      if (Index < 0 || Index > r.Text.Length)      {       seeks(FindString);       count = 0;       Index = 0;       MemoIndex = -1;      }      else      {       rtxt.Select(Index, FindString.Length);       myColor(rtxt);//设定关键字为颜色       rtxt.Focus();       Index += FindString.Length;       count++;       if (Index > str.Length - FindString.Length)       {        seeks(FindString);        MemoIndex = -1;        Index = 0;        count = 0;       }      }     }     else     {      seeks(FindString);      MemoIndex = -1;      Index = 0;      count = 0;     }    }    else    {     rtxt.Select(Index, FindString.Length);//在RichTextBox控件中搜索关键字     Index += FindString.Length;//递增标识查询关键字的初始长度     myColor(rtxt);//设定关键字为颜色     rtxt.Focus();     count++;    }   }   else   {    Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.None);    if (Index < r.Text.Length - FindString.Length && Index >= 0)    {     r.Select(Index, FindString.Length);     rtxt.Select(Index, FindString.Length);     myColor(rtxt);//设定关键字为颜色     Index += FindString.Length;//递增标识查询关键字的初始长度     rtxt.Focus();     count++;    }    else    {     seeks(FindString);     MemoIndex = -1;     Index = 0;     count = 0;    }   }  }   /// <summary> 类似 VS 的查找方法(不区分大小写向下查找)<para>　</para>  /// 参数1(txt):RichTextBox文本框<para></para>  /// 参数2(FindString):查找字符串</summary>  /// <param name="txt">RichTextBox文本框</param>  /// <param name="FindString">查找字符串</param>  private static void fileFindDownMin(RichTextBox rtxt, string FindString)  {   if (MemoIndex < 0)   {    MemoIndex = rtxt.SelectionStart;    if (MemoIndex > 10 && MemoIndex + FindString.Length <= rtxt.Text.Length)    {     str = rtxt.Text.Substring(0, MemoIndex + FindString.Length - 1);     Index = rtxt.SelectionStart;     r.Text = str;    }    else    {     str = rtxt.Text;     r.Text = rtxt.Text;     Index = rtxt.SelectionStart;    }   }   if (Index < str.Length - (FindString.Length - 1) && Index >= 0)   {    Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);    if (Index < 0 || Index > r.Text.Length)    {     seeks(FindString);     count = 0;     Index = 0;     MemoIndex = -1;    }    else    {     rtxt.Select(Index, FindString.Length);     myColor(rtxt);//设定关键字为颜色     rtxt.Focus();     count++;      Index += FindString.Length;     if (Index > str.Length - FindString.Length)     {      seeks(FindString);      MemoIndex = -1;      Index = 0;      count = 0;     }    }   }   else if (Index < rtxt.Text.Length && Index >= 0)   {    Index = rtxt.Find(FindString, Index, RichTextBoxFinds.MatchCase);    if (Index == -1)    {     if (r.Text != "")     {      Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);      if (Index < 0 || Index > r.Text.Length)      {       seeks(FindString);       count = 0;       Index = 0;       MemoIndex = -1;      }      else      {       rtxt.Select(Index, FindString.Length);       myColor(rtxt);//设定关键字为颜色       rtxt.Focus();       Index += FindString.Length;       count++;       if (Index > str.Length - FindString.Length)       {        seeks(FindString);        MemoIndex = -1;        Index = 0;        count = 0;       }      }     }     else     {      seeks(FindString);      MemoIndex = -1;      Index = 0;      count = 0;     }    }    else    {     rtxt.Select(Index, FindString.Length);//在RichTextBox控件中搜索关键字     Index += FindString.Length;//递增标识查询关键字的初始长度     myColor(rtxt);//设定关键字为颜色     rtxt.Focus();     count++;    }   }   else   {    Index = 0; Index = r.Find(FindString, Index, RichTextBoxFinds.MatchCase);    if (Index < r.Text.Length - FindString.Length && Index >= 0)    {     r.Select(Index, FindString.Length);     rtxt.Select(Index, FindString.Length);     myColor(rtxt);//设定关键字为颜色     Index += FindString.Length;//递增标识查询关键字的初始长度     rtxt.Focus();     count++;    }    else    {     seeks(FindString);     MemoIndex = -1;     Index = 0;     count = 0;    }   }  }#endregion

#region =★*★*★= 〖替换〗与〖全部替换〗 =★*★*★=  #region =★*★*★= 单次替换字符串 =★*★*★=  /// <summary> 替换 </summary>  /// <param name="rtxt">RichTextBox</param>  /// <param name="FindString">查找字符串</param>  /// <param name="ReplString">替换字符串</param>  /// <param name="TrueFalse">(bool值)区分大小写<para>　</para>真:区分<para></para>假:不区分</param>  public static void replaces(RichTextBox rtxt, string FindString, string ReplString, bool TrueFalse)  {   string txtSt = rtxt.SelectedText;   if (FindString.Equals(txtSt))   {    int fs = FindString.Length;    int rs = ReplString.Length;    int cs = fs - rs;    rtxt.SelectionLength = FindString.Length;    rtxt.SelectionColor = Color.Coral;    rtxt.SelectedText = ReplString;//textBox2中放要替换的字符     rtxt.Focus();    MemoIndex = -1;    rtxt.SelectionStart += cs;   }   FindDown(rtxt, FindString, TrueFalse);  }   #region =★*★*★= 替换字符串 =★*★*★=  /// <summary>替换字符串<para>　</para>   /// 参数1(FindString):查找的内容<para></para>   /// 参数2(ReplString):要替换的内容 </summary>   /// <param name="FindString">查找的内容</param>   /// <param name="ReplString">要替换的内容</param>   private static void replace(RichTextBox rtxt, string FindString, string ReplString)  {   rtxt.SelectionLength = FindString.Length;   rtxt.SelectedText = ReplString;//textBox2中放要替换的字符    Index = rtxt.SelectionStart;//获取或设置光标选定位置  }  #endregion  #endregion    #region =★*★*★= 〖全部替换〗 =★*★*★=  /// <summary> 全部替换<para>　</para>  /// 参数1(txt):RichTextBox 文本框<para></para>  /// 参数2(FindString):查找字符串<para></para>  /// 参数3(ReplString):替换字符串<para></para>  /// 参数4(trueFales):bool 真：区分大小写，假：不区分大小写</summary>  /// <param name="txt">RichTextBox 文本框</param>  /// <param name="FindString">查找字符串</param>  /// <param name="ReplString">替换字符串</param>  /// <param name="trueFales">bool 真：区分大小写，假：不区分大小写</param>  public static void ReplAll(RichTextBox rtxt, string FindString, string ReplString, bool trueFales)  {   if (trueFales)    onDistinCase(rtxt, FindString, ReplString);   else    offDistinCase(rtxt, FindString, ReplString);  }   #region =★*★*★= 全部替换(区分/不区分大小写) =★*★*★=  /// <summary> 全部替换(区分大小写) </summary>  /// <param name="rtxt">RichTextBox 文本框</param>  /// <param name="FindStr">查找字符串</param>  /// <param name="ReplStr">替换字符串</param>  private static void onDistinCase(RichTextBox rtxt, string FindStr, string ReplStr)  {   while (Index >= 0 || Index <= rtxt.Text.Length)   {    int cot = FindStr.Length - ReplStr.Length;    Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.MatchCase);    if (Index < 0 || Index > rtxt.Text.Length)    {     DialogResult r = MessageBox.Show(string.Format("查找结束，已经为您找到{0}个结果。", count),       "查找结果-Mxdr温馨提示!!", MessageBoxButtons.OK, MessageBoxIcon.Warning);     if (r == DialogResult.Yes)      count = 0;     Index = 0;     break;    }    else    {     rtxt.Select(Index, FindStr.Length);     replace(rtxt, FindStr, ReplStr);     Index += FindStr.Length;     count++;    }   }  }   /// <summary> 全部替换(不区分大小写) </summary>  /// <param name="rtxt">RichTextBox 文本框</param>  /// <param name="FindStr">查找字符串</param>  /// <param name="ReplStr">替换字符串</param>  private static void offDistinCase(RichTextBox rtxt, string FindStr, string ReplStr)  {   while (Index >= 0 || Index <= rtxt.Text.Length)   {    int cot = FindStr.Length - ReplStr.Length;    Index = rtxt.Find(FindStr, Index, RichTextBoxFinds.None);    if (Index < 0 || Index > rtxt.Text.Length)    {     DialogResult r = MessageBox.Show(string.Format("查找结束，已经为您找到{0}个结果。", count),       "查找结果-Mxdr温馨提示!!", MessageBoxButtons.OK, MessageBoxIcon.Warning);     if (r == DialogResult.Yes)      count = 0;     Index = 0;     break;    }    else    {     rtxt.Select(Index, FindStr.Length);     replace(rtxt, FindStr, ReplStr);     Index += FindStr.Length;     count++;    }   }  }  #endregion  #endregion   #endregion

#region =★*★*★= 消息提示,提示用户查找结果 =★*★*★=  /// <summary> 消息提示,提示用户查找结果<para>　<para>   /// 参数1(str):用户指定要查找的字符串</para></para> </summary>   /// <param name="str">用户指定要查找的字符串</param>   public static void seeks(string str)  {   if (count != 0)    MessageBox.Show(string.Format("已查找完毕,共〖{0}〗个 /"{1}/"!", count, str), "查找结果-Mxdr温馨提示!!");   else MessageBox.Show(string.Format("没有查找到 /"{0}/"!", str), "查找 - Mxdr温馨提示!");  }  #endregion

#region =★*★*★= 查找字符上色 =★*★*★=  /// <summary> 查找字符上色 </summary>  /// <param name="rtxt">RichTextBox</param>  private static void myColor(RichTextBox rtxt)  {   rtxt.SelectionColor = Color.Coral;  }  #endregion