Question

我在我的WPF richtextbox上启用了拼写，我希望在显示拼写建议的上下文菜单之前，在当前插入位置获取拼写错误的单词。

Answer 1

新方式

    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

检查一下 http://www.dotnetfunda.com/articles/article842-spellchecker-in-wpf-.aspx

这里似乎讨论了一些可能有助于您的方案的选项： “这里我们使用SpellingError类来获取Suggessions.CareInIndex返回carat在文本框中的索引。只有当前Carat位置有一个有错误的单词并且还为TextBox启用了SpellCheck时，GetSpellingError才能返回SpellingError对象。”

Answer 3

旧方式

    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

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
   }
}

WPF RichTextBox - 在当前的插入位置获得全文

4 个答案: