C# RichTextBox.SelectAll方法代码示例

        /// <summary>
        /// Highlight all words that matches.
        /// </summary>
        /// <param name="myRtb">Source text box</param>
        /// <param name="word">Word to match.</param>
        public void HighlightText(RichTextBox myRtb, string word)
        {
            myRtb.SelectAll();
            myRtb.SelectionBackColor = Color.White;
            myRtb.SelectionColor = Color.Black;
            myRtb.DeselectAll();

            if (word == "")
            {
                return;
            }

            int s_start = myRtb.SelectionStart, startIndex = 0, index;

            while ((index = myRtb.Text.IndexOf(word, startIndex)) != -1)
            {
                myRtb.Select(index, word.Length);
                myRtb.SelectionColor = Color.White;
                myRtb.SelectionBackColor = Color.Green;

                startIndex = index + word.Length;
            }

            myRtb.SelectionStart = s_start;
            myRtb.SelectionLength = 0;
            myRtb.SelectionColor = Color.Black;
            myRtb.SelectionBackColor = Color.White;
        }

 private void setFontStyle(RichTextBox rtb, FontStyle style)
 {
     if (rtb.SelectionLength == 0)
         setCharFontStyle(rtb, style);
     else
     {
         // to avoid screen refreshing, we create a fake RichTextBox
         using (RichTextBox a = new RichTextBox())
         {
             a.SuspendLayout();
             a.SelectedRtf = rtb.SelectedRtf;
             a.SelectAll();
             int selectionStart = a.SelectionStart;
             int selectionLength = a.SelectionLength;
             int selectionEnd = selectionStart + selectionLength;
             for (int x = selectionStart; x < selectionEnd; ++x)
             {
                 // Set temporary selection
                 a.Select(x, 1);
                 // Toggle font style of the selection
                 setCharFontStyle(a, style);
             }
             // Restore the original selection
             a.SelectAll();
             rtb.SelectedRtf = a.SelectedRtf;
         }
     }
 }

        public void Paint(int StartLine, int FinalLine, RichTextBox RTB)
        {
            if(StartLine < 0 || FinalLine < 0)
            {
                Console.WriteLine("错误：着色起始或终止行号 < 0");
                return;
            }
            int OriSelectionStart = RTB.SelectionStart; //记录光标位置
            RTB.SelectionChanged -= new System.EventHandler(mainform.richTextBox1_SelectionChanged);//注销选区改变事件，以免处理过程中多次触发、
            RTB.TextChanged -= new System.EventHandler(mainform.richTextBox1_TextChanged); //注销文字改变事件
            SendMessage(RTB.Handle, 0x0B, 0, 0); //第一轮加工开始，禁止组件重画，避免闪烁问题
            RTB.SelectAll();
            RTB.SelectionFont = Defines.TextBoxFont;
            RTB.DeselectAll();
            RTB.SelectionStart = OriSelectionStart;
            SendMessage(RTB.Handle, 0x0B, 1, 0); //第一轮加工结束，允许组件重画
            RTB.Refresh(); //组件刷新

            SendMessage(RTB.Handle, 0x0B, 0, 0); //第二轮加工开始，禁止组件重画，避免着色闪烁问题
            if (RTB.Lines.Length > 0 )
            {
                for (int i = StartLine; i <= FinalLine; i++) this.PaintLine(i, ref RTB); //对每行着色
            }
                RTB.SelectionLength = 0;
            RTB.SelectionStart = OriSelectionStart; //光标归位
            RTB.SelectionColor = Color.Black;
            SendMessage(RTB.Handle, 0x0B, 1, 0); //第二轮加工结束，允许组件重画
            RTB.TextChanged += new System.EventHandler(mainform.richTextBox1_TextChanged); //恢复事件
            RTB.SelectionChanged += new System.EventHandler(mainform.richTextBox1_SelectionChanged); //恢复事件
            RTB.Refresh();
        }

        public string FormattedAnswer()
        {
            RichTextBox rtb = new RichTextBox();
            rtb.Text = Answer;
            rtb.Font = new Font("Segoe UI", 10);

            if (IsCorrect) {
                rtb.Select(0, Answer.Length);
                rtb.SelectionColor = Color.Green;
                rtb.SelectionAlignment = HorizontalAlignment.Center;
                rtb.DeselectAll();
                return rtb.Rtf;
            }

            rtb.Text += " " + RightAnswer;
            rtb.Select(0, Answer.Length);
            rtb.SelectionFont = new Font(rtb.SelectionFont, FontStyle.Strikeout);
            rtb.Select(Answer.Length + 1, RightAnswer.Length);
            rtb.SelectionColor = Color.Green;
            rtb.SelectAll();
            rtb.SelectionAlignment = HorizontalAlignment.Center;
            rtb.DeselectAll();

            return rtb.Rtf;
        }

        void 中译英入题目表()
        {
            SqlConnection conn = new SqlConnection(login.sqlName);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "new_教师英语词组_中译英";
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.Add("timuWenBen", SqlDbType.VarChar).Value = textBox2.Text.Trim() + textBox1.Text.Trim();
            cmd.Parameters.Add("teacherName", SqlDbType.NVarChar).Value = login.teacherName;
            //cmd.Parameters.Add("wentiYinPin", SqlDbType.NVarChar).Value = "无";
            cmd.Parameters.Add("cizuID", SqlDbType.NVarChar).Value = cizuID;
            cmd.Parameters.Add("nianji", SqlDbType.NVarChar).Value = comboBox1.Text;
            cmd.Parameters.Add("danyuan", SqlDbType.NVarChar).Value = comboBox2.Text;
            cmd.Parameters.Add("zhongYiyingID", SqlDbType.Int).Direction = ParameterDirection.Output;
            cmd.ExecuteNonQuery();
            id中译英 = (int)cmd.Parameters["zhongYiyingID"].Value;
            conn.Dispose();
            cmd.Dispose();

            RichTextBox rtb问题 = new RichTextBox();
            rtb问题.Font = new Font("微软雅黑", 30);
            rtb问题.Text = textBox2.Text;
            rtb问题.SelectAll();
            rtb问题.SaveFile(login.qfold + id中译英, RichTextBoxStreamType.RichText);

            RichTextBox rtb答案 = new RichTextBox();
            rtb答案.Font = new Font("微软雅黑", 35);
            rtb答案.ForeColor = Color.Red;
            rtb答案.Text = textBox1.Text + "\n";
            rtb答案.SelectAll();

            RichTextBox eg1Eng = new RichTextBox();
            eg1Eng.Font = new Font("微软雅黑", 20);
            eg1Eng.Text = textBox3.Text;

            RichTextBox eg1Ch = new RichTextBox();
            eg1Ch.Font = new Font("楷体", 15);
            eg1Ch.ForeColor = Color.Gray;
            eg1Ch.Text = textBox4.Text + "\n";

            RichTextBox eg2Eng = new RichTextBox();
            eg2Eng.Font = new Font("微软雅黑", 20);
            eg2Eng.Text = textBox5.Text;

            RichTextBox eg2Ch = new RichTextBox();
            eg2Ch.Font = new Font("楷体", 15);
            eg2Ch.ForeColor = Color.Gray;
            eg2Ch.Text = textBox6.Text;

            RichTextBox rtb合并 = new RichTextBox();
            rtb合并.SelectedRtf = rtb问题.Rtf;
            rtb合并.SelectedRtf = rtb答案.Rtf;
            rtb合并.SelectedRtf = eg1Eng.Rtf;
            rtb合并.SelectedRtf = eg1Ch.Rtf;
            rtb合并.SelectedRtf = eg2Eng.Rtf;
            rtb合并.SelectedRtf = eg2Ch.Rtf;

            rtb合并.SaveFile(login.afold + id中译英, RichTextBoxStreamType.RichText);
        }

        public void calibrateTextView(RichTextBox textView)
        {
            int i = textView.SelectionStart;

            //margins
            textView.SelectAll();
            textView.SelectionIndent = 9;
            textView.SelectionRightIndent = 9;
            textView.SelectionLength = 0;
            textView.SelectionBackColor = textView.BackColor;

            textView.SelectionStart = i;

            if (goodFont != null) {
                textView.Font = goodFont;

                //winforms bag. If new forecolor is equal to old the text will not be redraw.
                textView.ForeColor = Color.Gold;
                textView.ForeColor = Color.White;
            }
        }

        void 听录音存入数据库()
        {
            RichTextBox rtb7 = new RichTextBox();

            //存英中文答案
            rtb7.Text = textBox3.Text +"\n"+ textBox1.Text;
            rtb7.SelectAll();
            rtb7.SelectionFont = new Font("微软雅黑", 35);
            rtb7.SelectionColor = Color.Red;
            RichTextBox rtb9 = new RichTextBox();
            rtb9.SelectedRtf = rtb7.Rtf;
            rtb9.SelectedRtf = this.richTextBox1.Rtf;

            //存入数据库
            SqlConnection conn = new SqlConnection(login.sqlName);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "new_教师录英语词汇_单词中译英";
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.Add("teacherName", SqlDbType.NVarChar).Value = login.teacherName;
            cmd.Parameters.Add("tixing", SqlDbType.NVarChar).Value = "听录音,默写英文和中文";
            cmd.Parameters.Add("wentiYinPin", SqlDbType.NVarChar).Value = audioStr;
            cmd.Parameters.Add("zhangjie", SqlDbType.NVarChar).Value = str章节;
            cmd.Parameters.Add("daanYinPin", SqlDbType.NVarChar).Value = "无";
            cmd.Parameters.Add("题目文本", SqlDbType.NVarChar).Value = rtb7.Text.Trim();
            cmd.Parameters.Add("id", SqlDbType.Int).Direction = ParameterDirection.Output;
            cmd.ExecuteNonQuery();
            questionID听录音 = (int)cmd.Parameters["id"].Value;

            //题号存入词汇表
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = string.Format("update 英语词汇表 set 听录音ID = {0} where id = {1}", questionID听录音, 词汇ID);
            cmd.ExecuteNonQuery();

            //存储文件
            rtb8.SaveFile(login.qfold + questionID听录音, RichTextBoxStreamType.RichText);
            rtb9.SaveFile(login.afold + questionID听录音, RichTextBoxStreamType.RichText);
        }

        /// <summary>
        /// Adds the text to RTB.
        /// </summary>
        /// <param name="richTextBox">The rich text box.</param>
        /// <param name="stackCard">The stack card.</param>
        /// <remarks>Documented by Dev08, 2009-05-12</remarks>
        private void AddTextToRTB(RichTextBox richTextBox, StackCard stackCard)
        {
            richTextBox.SuspendLayout();

            AnswerResult result = stackCard.Promoted ? AnswerResult.Correct : (stackCard.Result == AnswerResult.Almost ? AnswerResult.Almost : AnswerResult.Wrong);
            System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(@"<[^>]*>");  //to replace html code if any
            bool questionRTL = stackCard.QuestionCulture.TextInfo.IsRightToLeft;
            bool answerRTL = stackCard.AnswerCulture.TextInfo.IsRightToLeft;

            richTextBox.BackColor = StackCardBackColors.ContainsKey(result) ? StackCardBackColors[result] : SystemColors.Window;
            richTextBox.ForeColor = this.ForeColor;

            string text = Environment.NewLine;

            string questionRLE = (questionRTL ? Convert.ToString(Convert.ToChar(RLE)) : string.Empty);

            text += questionRLE + regex.Replace(stackCard.Question, String.Empty) + Environment.NewLine;
            text += questionRLE + regex.Replace(stackCard.QuestionExample, String.Empty) + Environment.NewLine;

            text += Environment.NewLine;

            string answerRLE = (answerRTL ? Convert.ToString(Convert.ToChar(RLE)) : string.Empty);

            if (stackCard.LearnMode == MLifter.BusinessLayer.LearnModes.Sentence && stackCard.AnswerExample.Length > 0)
            {
                text += answerRLE + regex.Replace(stackCard.AnswerExample, String.Empty) + Environment.NewLine;
                text += answerRLE + regex.Replace(stackCard.Answer, String.Empty) + Environment.NewLine;
            }
            else
            {
                text += answerRLE + regex.Replace(stackCard.Answer, String.Empty) + Environment.NewLine;
                text += answerRLE + regex.Replace(stackCard.AnswerExample, String.Empty) + Environment.NewLine;
            }
            richTextBox.Visible = true;
            richTextBox.Text = text;
            richTextBox.Font = this.Font;

            richTextBox.SelectAll();
            richTextBox.SelectionFont = this.Font;
            richTextBox.Select(0, 0);

            richTextBox.ResumeLayout();
        }

        public void prepareTextView(RichTextBox textView)
        {
            //margins
            textView.SelectAll();
            textView.SelectionIndent = 9;
            textView.SelectionRightIndent = 9;
            textView.SelectionLength = 0;
            textView.SelectionBackColor = textView.BackColor;

            //params
            float currSize = textView.Font.Size; //default text size
            float textConst = 0.89F; //magic const
            int ipodLineSymbolsCount = 27; //how many symbols fiited in ipod line
            int textViewLineSymbolsCount = 39; //textview line

            // get new size
            float fontSize = ((textViewLineSymbolsCount * currSize) / ipodLineSymbolsCount) * textConst;

            //set new font
            goodFont = new Font("Arial", fontSize);
            textView.Font = goodFont;

            textView.SelectionStart = textView.Text.Length;
        }

        private static void colorizeCode(RichTextBox rtb)
        {
            string[] keywords = {"as", "do", "if", "in", "is", "for", "int", "new", "out", "ref", "try", "base", 
                                "bool", "byte", "case", "char", "else", "enum", "goto", "lock", "long", "null", 
                                "this", "true", "uint", "void", "break", "catch", "class", "const", "event", "false", 
                                "fixed", "float", "sbyte", "short", "throw", "ulong", "using", "where", "while", 
                                "yield", "double", "extern", "object", "params", "public", "return", "sealed", 
                                "sizeof", "static", "string", "struct", "switch", "typeof", "unsafe", "ushort", 
                                "checked", "decimal", "default", "finally", "foreach", "partial", "private", 
                                "virtual", "abstract", "continue", "delegate", "explicit", "implicit", "internal", 
                                "operator", "override", "readonly", "volatile",  
                                "interface", "namespace", "protected", "unchecked",
                                "stackalloc", 
                                "from", "in", "where", "select", "join", "equals", "let", "on", "group", "by", 
                                "into", "orderby", "ascending", "descending", "var"};
            string text = rtb.Text;
            
            rtb.SelectAll();
            rtb.SelectionColor = rtb.ForeColor;

            foreach (String keyword in keywords)
            {
                int keywordPos = rtb.Find(keyword, RichTextBoxFinds.MatchCase | RichTextBoxFinds.WholeWord);
                while (keywordPos != -1)
                {
                    int commentPos = text.LastIndexOf("//", keywordPos, StringComparison.OrdinalIgnoreCase);
                    int newLinePos = text.LastIndexOf("\n", keywordPos, StringComparison.OrdinalIgnoreCase);
                    int quoteCount = 0;
                    int quotePos = text.IndexOf("\"", newLinePos + 1, keywordPos - newLinePos, StringComparison.OrdinalIgnoreCase);
                    while (quotePos != -1)
                    {
                        quoteCount++;
                        quotePos = text.IndexOf("\"", quotePos + 1, keywordPos - (quotePos + 1),StringComparison.OrdinalIgnoreCase);
                    }

                    if (newLinePos >= commentPos && quoteCount % 2 == 0)
                        rtb.SelectionColor = Color.Blue;

                    keywordPos = rtb.Find(keyword, keywordPos + rtb.SelectionLength, RichTextBoxFinds.MatchCase | RichTextBoxFinds.WholeWord);
                }
            }

            rtb.Select(0, 0);
        }

 // Copy to clipboard
 private void button2_Click(object sender, EventArgs e)
 {
     ListView listView1 = (ListView)tabControl1.TabPages[tabControl1.SelectedIndex].Controls[0];
     RichTextBox textBox = new RichTextBox();
     foreach (ListViewItem item in listView1.Items)
     {
         textBox.Text += item.Text + ": " + item.SubItems[1].Text + "\n";
     }
     textBox.SelectAll();
     textBox.Copy();
     ManagedMessageBox.ShowMessage(Program.ResourceManager.GetString("Message_Done"));
 }

 protected void ColourCompounds(RichTextBox box)
 {
   int oldSelectionStart = box.SelectionStart;
   int oldSelectionLength = box.SelectionLength;
   box.SelectAll();
   box.SelectionBackColor = box.BackColor;
   box.SelectionColor = box.ForeColor;
   Dictionary<int, int> unparseable = CheckCompounds(box.Text);
   foreach (KeyValuePair<int, int> kvp in unparseable)
   {
     box.Select(kvp.Key, kvp.Value);
     box.SelectionBackColor = Color.DarkRed;
     box.SelectionColor = Color.White;
   }
   box.Select(oldSelectionStart, oldSelectionLength);
 }

 private void formatUnform(RichTextBox rtb)
 {
     format(rtb, Util.REF, Util.TRANSFONT, ResolvedRefrainForegroundColor, 0, "Refrain :" + Util.RTNL, "");
       format(rtb, Util.SPEC, new Font(Util.SPECFONT.FontFamily, Util.TRANSFONT.Size, Util.SPECFONT.Style),
      ResolvedForegroundColor, 0, "", "");
       formatBlock(rtb);
       format(rtb, Util.BOLD, Util.TRANSFONT, ResolvedForegroundColor, 0, "", "");
       format(rtb, Util.ITALIC, Util.TRANSFONT, ResolvedForegroundColor, 0, "", "");
       rtb.SelectAll();
       rtb.SelectionFont = Util.TRANSFONT;
 }

        void UpdateLineNumbers(RichTextBox lineNumbers, RichTextBox thisRtb)
        {
            //getLinefromCharindex isn't the same as line number when dealing with wordwrap
               // string[] textLines = thisRtb.Text.Split('\n');
            int topLine = lineFromCharIndex(thisRtb.Text, (thisRtb.GetCharIndexFromPosition(new Point(0,0))));

            int bottomLine = thisRtb.GetLineFromCharIndex(thisRtb.GetCharIndexFromPosition(new Point(1, thisRtb.Height)));

            int currentLine = 0;
            lineNumbers.Text = "";
            int lastLine = 0;

            for (int i = topLine; i <= bottomLine; i++)
            {

                currentLine = lineFromCharIndex(thisRtb.Text, thisRtb.GetFirstCharIndexFromLine(i-1));

                if (lastLine != currentLine)
                {
                    lineNumbers.AppendText(currentLine + "");
                    lastLine = currentLine;
                }

                lineNumbers.AppendText("\n");
            }

            lineNumbers.SelectAll();
            lineNumbers.SelectionAlignment = HorizontalAlignment.Right;
        }

        void 中译英入题目表()
        {
            SqlConnection conn = new SqlConnection(login.sqlName);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "new_教师英语单词_中译英";
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.Add("timuWenBen", SqlDbType.VarChar).Value = textBox2.Text.Trim()+textBox1.Text.Trim();
            cmd.Parameters.Add("teacherName", SqlDbType.NVarChar).Value = login.teacherName;
            //cmd.Parameters.Add("wentiYinPin", SqlDbType.NVarChar).Value = "无";
            cmd.Parameters.Add("danciID", SqlDbType.NVarChar).Value = wordID;
            cmd.Parameters.Add("zhongYiyingID", SqlDbType.Int).Direction = ParameterDirection.Output;
            cmd.ExecuteNonQuery();
            id中译英 = (int)cmd.Parameters["zhongYiyingID"].Value;
            conn.Dispose();
            cmd.Dispose();

            RichTextBox rtbQ = new RichTextBox();
            rtbQ.Text = textBox2.Text + "\n";
            rtbQ.SelectAll();
            rtbQ.SelectionFont = new Font("微软雅黑", 35);
            rtbQ.SaveFile(login.qfold + id中译英, RichTextBoxStreamType.RichText);

            RichTextBox rtbA = new RichTextBox();
            rtbA.Font = new Font("微软雅黑", 45);
            rtbA.ForeColor = Color.Red;
            rtbA.Text = textBox1.Text;

            RichTextBox rtbYinBiao = new RichTextBox();
            rtbYinBiao.Font = new Font("Lucida Sans Unicode", 20);
            rtbYinBiao.ForeColor = Color.Gray;
            rtbYinBiao.Text = textBox7.Text + "\n";

            RichTextBox eg1Eng = new RichTextBox();
            eg1Eng.Font = new Font("微软雅黑", 20);
            eg1Eng.Text = textBox3.Text;

            RichTextBox eg1Ch = new RichTextBox();
            eg1Ch.Font = new Font("楷体", 15);
            eg1Ch.ForeColor = Color.Gray;
            eg1Ch.Text = textBox4.Text + "\n";

            RichTextBox eg2Eng = new RichTextBox();
            eg2Eng.Font = new Font("微软雅黑", 20);
            eg2Eng.Text = textBox5.Text;

            RichTextBox eg2Ch = new RichTextBox();
            eg2Ch.Font = new Font("楷体", 15);
            eg2Ch.ForeColor = Color.Gray;
            eg2Ch.Text = textBox6.Text ;

            RichTextBox rtbZong = new RichTextBox();
            rtbZong.SelectedRtf = rtbQ.Rtf;
            rtbZong.SelectedRtf = rtbA.Rtf;
            rtbZong.SelectedRtf = rtbYinBiao.Rtf;
            rtbZong.SelectedRtf = eg1Eng.Rtf;
            rtbZong.SelectedRtf = eg1Ch.Rtf;
            rtbZong.SelectedRtf = eg2Eng.Rtf;
            rtbZong.SelectedRtf = eg2Ch.Rtf;

            rtbZong.SaveFile(login.afold + id中译英, RichTextBoxStreamType.RichText);
        }