WPF RichTextBox - 在当前插入位置获取整个字

Question

我启用了我的WPF richtextbox上的拼写，并且我想在显示拼写建议的上下文菜单之前，在当前插入符的位置上得到拼写错误的单词。

Answer 1

的新途径

void richTextBox1_PreviewKeyDown(object sender, KeyEventArgs e) 
    { 
     if (e.Key == Key.Back) 
     { 
      TextPointer start = richTextBox1.CaretPosition; 
      string text1 = start.GetTextInRun(LogicalDirection.Backward); 
      TextPointer end = start.GetNextContextPosition(LogicalDirection.Backward); 
      string text2 = end.GetTextInRun(LogicalDirection.Backward); 

      richTextBox1.Selection.Select(start, end); 
      richTextBox1.Selection.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Black); 
      richTextBox1.Selection.Select(start, start); 
      //e.Handled = true; 
     } 
    } 

Answer 2

检查了这一点 http://www.dotnetfunda.com/articles/article842-spellchecker-in-wpf-.aspx

权在这里似乎讨论一些选项可以帮助您的方案： “在这里我们使用SpellingError类来获取Suggessions CaretIndex返回，其中克拉的索引文本框。GetSpellingError可以返回SpellingError对象仅在当前位置克拉有错误的单词也拼写检查对TextBox启用。“

Answer 3

旧的方式

private void richTextBox1_KeyDown(object sender, KeyEventArgs e) 
    { 
     if (e.KeyCode == Keys.Back) 
     { 
      var z = this.richTextBox1.SelectionStart; 
      var r = richTextBox1.Find(" ", 0, z, RichTextBoxFinds.None | RichTextBoxFinds.Reverse); 
      var q = this.richTextBox1.Text.Substring(r + 1, z - r - 1); 
      switch (q) 
      { 
       case "test": 
        this.richTextBox1.SelectionStart = r + 1; 
        this.richTextBox1.SelectionLength = z - r - 1; 
        this.richTextBox1.SelectionColor = Color.Black; 
        this.richTextBox1.SelectionStart += this.richTextBox1.SelectionLength; 
        this.richTextBox1.SelectionLength = 0; 
        //e.Handled = true; 
        break; 
       default: 
        this.richTextBox1.SelectionStart = z; 
        break; 
      } 
     } 
    } 

Answer 4

以供将来参考：

void richTextBox1_PreviewKeyDown(object sender, KeyEventArgs e) 
{ 
    var rtb = (RichTextBox)sender; 
    var tr = rtb.GetSpellingErrorRange(rtb.CaretPosition); 
    if(tr != null) 
    { 
     string spellingerror = tr.Text; 
     //Do whatever 
    } 
}