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這篇文章主要介紹C#如何實現(xiàn)記事本查找與替換功能,文中介紹的非常詳細,具有一定的參考價值,感興趣的小伙伴們一定要看完!
先上效果圖
定義全局變量
#region =★*★*★= 〖查找替換〗的自定義變量 =★*★*★= /// <summary> 獲取或設置查找起始位置 </summary> static int Index = 0; /// <summary> 查找到的字符串數(shù)量 </summary> static int count = 0; /// <summary> 查找字符是否變更 static string strE = string.Empty; /// <summary> 記錄原始光標位置 </summary> static int MemoIndex = -1; /// <summary> 過度字符串變量 </summary> static string str = string.Empty; /// <summary> 實例化富文本 </summary> static RichTextBox r = new RichTextBox(); #endregion
向上查找
#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〗(不區(qū)分大小寫)<para> <para> /// 參數(shù)1(rbox):內容文本框,指定為 RichTextBox 文本框類型<para> /// 參數(shù)2(str):用戶指定要查找的字符串</para> /// </para></para> </summary> /// <param name="rbox">內容文本框,指定為 RichTextBox 文本框類型</param> /// <param name="str">用戶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);//設定關鍵字為顏色 if (Index <= 0) { seeks(str); count = 0; } } else if (Index < 0) { seeks(str); count = 0; } } #endregion
向下查找
#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> /// 參數(shù)1(rbox):內容文本框,指定為 RichTextBox 文本框類型 <para></para> /// 參數(shù)2(FindStr):用戶指定要查找的字符串<para></para> /// 參數(shù)3(TrueFales):bool 真:限定大小寫 假:不分大小寫</summary> /// <param name="rbox">內容文本框,指定為 RichTextBox 文本框類型</param> /// <param name="FindStr">用戶指定要查找的字符串</param> /// <param name="TrueFales">bool 真:限定大小寫 假:不分大小寫</param> public static void FindDown(RichTextBox rtxt, string FindStr,bool TrueFales) { if (TrueFales) fileFindDownMax(rtxt, FindStr); else fileFindDownMin(rtxt, FindStr); } #endregion #region =★*★*★= 簡單的從上到下查找 =★*★*★= /// <summary>向下查找指定〖字符 或 字符串〗(限定大小寫)<para> <para> /// 參數(shù)1(rbox):內容文本框,指定為 RichTextBox 文本框類型 /// <para>參數(shù)2(FindStr):用戶指定要查找的字符串</para> /// </para></para> </summary> /// <param name="rbox">內容文本框,指定為 RichTextBox 文本框類型</param> /// <param name="FindStr">用戶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);//設定關鍵字為顏色 Index += FindStr.Length; rtxt.Focus(); } } /// <summary>向下查找指定〖字符 或 字符串〗(不區(qū)分大小寫)<para> <para> /// 參數(shù)1(rbox):內容文本框,指定為 RichTextBox 文本框類型 /// <para>參數(shù)2(FindStr):用戶指定要查找的字符串</para> /// </para></para> </summary> /// <param name="rbox">內容文本框,指定為 RichTextBox 文本框類型</param> /// <param name="FindStr">用戶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);//設定關鍵字為顏色 Index += FindStr.Length; rtxt.Focus(); } } #endregion //* 類似 VS 的查找方法 */ #region =★*★*★= 類似 VS 的查找方法 =★*★*★= /// <summary> 類似 VS 的查找方法(不區(qū)分大小寫向下查找)<para> </para> /// 參數(shù)1(txt):RichTextBox文本框<para></para> /// 參數(shù)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);//截取光標位置 + 查找字符數(shù) - 1 位數(shù) 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);//設定關鍵字為顏色 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);//設定關鍵字為顏色 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控件中搜索關鍵字 Index += FindString.Length;//遞增標識查詢關鍵字的初始長度 myColor(rtxt);//設定關鍵字為顏色 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);//設定關鍵字為顏色 Index += FindString.Length;//遞增標識查詢關鍵字的初始長度 rtxt.Focus(); count++; } else { seeks(FindString); MemoIndex = -1; Index = 0; count = 0; } } } /// <summary> 類似 VS 的查找方法(不區(qū)分大小寫向下查找)<para> </para> /// 參數(shù)1(txt):RichTextBox文本框<para></para> /// 參數(shù)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);//設定關鍵字為顏色 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);//設定關鍵字為顏色 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控件中搜索關鍵字 Index += FindString.Length;//遞增標識查詢關鍵字的初始長度 myColor(rtxt);//設定關鍵字為顏色 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);//設定關鍵字為顏色 Index += FindString.Length;//遞增標識查詢關鍵字的初始長度 rtxt.Focus(); count++; } else { seeks(FindString); MemoIndex = -1; Index = 0; count = 0; } } } #endregion
替換 與 全部替換(功能不是很全)
#region =★*★*★= 〖替換〗與〖全部替換〗 =★*★*★= #region =★*★*★= 單次替換字符串 =★*★*★= /// <summary> 替換 </summary> /// <param name="rtxt">RichTextBox</param> /// <param name="FindString">查找字符串</param> /// <param name="ReplString">替換字符串</param> /// <param name="TrueFalse">(bool值)區(qū)分大小寫<para> </para>真:區(qū)分<para></para>假:不區(qū)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中放要替換的字符 rtxt.Focus(); MemoIndex = -1; rtxt.SelectionStart += cs; } FindDown(rtxt, FindString, TrueFalse); } #region =★*★*★= 替換字符串 =★*★*★= /// <summary>替換字符串<para> </para> /// 參數(shù)1(FindString):查找的內容<para></para> /// 參數(shù)2(ReplString):要替換的內容 </summary> /// <param name="FindString">查找的內容</param> /// <param name="ReplString">要替換的內容</param> private static void replace(RichTextBox rtxt, string FindString, string ReplString) { rtxt.SelectionLength = FindString.Length; rtxt.SelectedText = ReplString;//textBox2中放要替換的字符 Index = rtxt.SelectionStart;//獲取或設置光標選定位置 } #endregion #endregion #region =★*★*★= 〖全部替換〗 =★*★*★= /// <summary> 全部替換<para> </para> /// 參數(shù)1(txt):RichTextBox 文本框<para></para> /// 參數(shù)2(FindString):查找字符串<para></para> /// 參數(shù)3(ReplString):替換字符串<para></para> /// 參數(shù)4(trueFales):bool 真:區(qū)分大小寫,假:不區(qū)分大小寫</summary> /// <param name="txt">RichTextBox 文本框</param> /// <param name="FindString">查找字符串</param> /// <param name="ReplString">替換字符串</param> /// <param name="trueFales">bool 真:區(qū)分大小寫,假:不區(qū)分大小寫</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 =★*★*★= 全部替換(區(qū)分/不區(qū)分大小寫) =★*★*★= /// <summary> 全部替換(區(qū)分大小寫) </summary> /// <param name="rtxt">RichTextBox 文本框</param> /// <param name="FindStr">查找字符串</param> /// <param name="ReplStr">替換字符串</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("查找結束,已經為您找到{0}個結果。", count), "查找結果-Mxdr溫馨提示!!", 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> 全部替換(不區(qū)分大小寫) </summary> /// <param name="rtxt">RichTextBox 文本框</param> /// <param name="FindStr">查找字符串</param> /// <param name="ReplStr">替換字符串</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("查找結束,已經為您找到{0}個結果。", count), "查找結果-Mxdr溫馨提示!!", 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
消息彈窗
#region =★*★*★= 消息提示,提示用戶查找結果 =★*★*★= /// <summary> 消息提示,提示用戶查找結果<para> <para> /// 參數(shù)1(str):用戶指定要查找的字符串</para></para> </summary> /// <param name="str">用戶指定要查找的字符串</param> public static void seeks(string str) { if (count != 0) MessageBox.Show(string.Format("已查找完畢,共〖{0}〗個 \"{1}\"!", count, str), "查找結果-Mxdr溫馨提示!!"); else MessageBox.Show(string.Format("沒有查找到 \"{0}\"!", str), "查找 - Mxdr溫馨提示!"); } #endregion
查找字符著色
#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
C#是一個簡單、通用、面向對象的編程語言,它由微軟Microsoft開發(fā),繼承了C和C++強大功能,并且去掉了一些它們的復雜特性,C#綜合了VB簡單的可視化操作和C++的高運行效率,以其強大的操作能力、優(yōu)雅的語法風格、創(chuàng)新的語言特性和便捷的面向組件編程從而成為.NET開發(fā)的首選語言,但它不適用于編寫時間急迫或性能非常高的代碼,因為C#缺乏性能極高的應用程序所需要的關鍵功能。
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