如何在用户编写时在RichTextBox中为不同颜色的不同单词着色，并在单击该彩色文本时引发事件

当用户在富文本框中写入某些单词时，如果该单词与某个特定单词匹配，则该单词的颜色应自动更改。

当用户点击该特定彩色文本时，它应该引发一个事件。

Answer 1

1）用户在RichTextBox中插入一些文本
2）如果输入的任何单词是预定义单词列表的一部分，则该单词应更改颜色（定义与每个单词相关的颜色）。
3）当在彩色单词上生成鼠标单击事件时，将引发事件。

可能的结果：

使用自定义EventArgs定义自定义EventHandler：

public class WordsEventArgs : EventArgs { private string word; public WordsEventArgs(string s) { word = s; } public string Word { get { return word; } set { word = value; } } } public delegate void WordsEventHandler(object sender, WordsEventArgs e); public event WordsEventHandler WordClicked; protected void OnWordClicked(WordsEventArgs e) { WordsEventHandler WordsHandler = WordClicked; if (WordsHandler != null) { WordsHandler(this, e); } } 

订阅活动：

 this.WordClicked += new WordsEventHandler(this.Word_Click); 

单词列表的简单类：

 public class ColoredWord { public string Word { get; set; } public Color WordColor { get; set; } } public List ColoredWords = new List(); 

在列表中填入一些相关颜色的单词，然后将其绑定到列表框：

 FillColoredWords(); public void FillColoredWords() { ColoredWords.Add(new ColoredWord { Word = "SIMPLE", WordColor = Color.Goldenrod }); ColoredWords.Add(new ColoredWord { Word = "COLORED", WordColor = Color.Salmon }); ColoredWords.Add(new ColoredWord { Word = "TEXT", WordColor = Color.DarkCyan }); this.listBox1.DisplayMember = "Word"; this.listBox1.DataSource = ColoredWords; } 

在richTextBox1.KeyPress()事件中，评估最后输入的单词是否为要着色的单词列表的一部分：

 private void richTextBox1_KeyPress(object sender, KeyPressEventArgs e) { int CurrentPosition = richTextBox1.SelectionStart; if (e.KeyChar == (char)Keys.Space && CurrentPosition > 0 && richTextBox1.Text.Length > 1) { int LastSpacePos = richTextBox1.Text.LastIndexOf((char)Keys.Space, CurrentPosition - 1); LastSpacePos = LastSpacePos > -1 ? LastSpacePos + 1 : 0; string LastWord = richTextBox1.Text.Substring(LastSpacePos, CurrentPosition - (LastSpacePos)); ColoredWord result = ColoredWords.FirstOrDefault(s => s.Word == LastWord.ToUpper()); richTextBox1.Select(LastSpacePos, CurrentPosition - LastSpacePos); if (result != null) { if (richTextBox1.SelectionColor != result.WordColor) richTextBox1.SelectionColor = result.WordColor; } else { if (richTextBox1.SelectionColor != richTextBox1.ForeColor) richTextBox1.SelectionColor = richTextBox1.ForeColor; } richTextBox1.SelectionStart = CurrentPosition; richTextBox1.SelectionLength = 0; richTextBox1.SelectionColor = richTextBox1.ForeColor; } } 

在richTextBox1_MouseClick()事件中，validation是否在彩色字上生成了单击。
确实如此，提升自定义的OnWordClicked()事件：

 private void richTextBox1_MouseClick(object sender, MouseEventArgs e) { if (richTextBox1.SelectionColor.ToArgb() != richTextBox1.ForeColor.ToArgb()) { try { int WordInit = richTextBox1.Text.LastIndexOf((char)32, richTextBox1.SelectionStart); WordInit = WordInit > -1 ? WordInit : 0; int WordEnd = richTextBox1.Text.IndexOf((char)32, richTextBox1.SelectionStart); string WordClicked = richTextBox1.Text.Substring(WordInit, WordEnd - WordInit) + Environment.NewLine; OnWordClicked(new WordsEventArgs(WordClicked)); } catch (Exception) { //Handle a fast doublelick: RTB is a bit dumb. //Handle a word auto-selection that changes the `.SelectionStart` value } } } 

在自定义事件中，将单击的单词添加到文本框文本中：

 private void Word_Click(object sender, WordsEventArgs e) { textBox1.AppendText(e.Word); } 

Answer 2

首先添加一个事件到您的富文本框文本已更改，然后您需要更改文本的颜色，如果这是一个特定的单词，例如：Munis，Ali

  private void Rchtxt_TextChanged(object sender, EventArgs e) { this.CheckKeyword("Munis", Color.Purple, 0); this.CheckKeyword("Ali", Color.Green, 0); }