把单词放在光标下，我错在哪里

本文关键字：我错在哪里 光标 单词放 | 更新日期: 2023-09-27 18:05:50

我错在哪里?我想在网站上做一个单词到textbox2。很抱歉，因为我的工程学不好。:) 

private void txtHoverWord_MouseMove(object sender, MouseEventArgs e){
    if (!(sender is TextBox)) return;
    var targetTextBox = sender as TextBox;
    if (targetTextBox.TextLength < 1) return;
    var currentTextIndex = textBox2.GetCharIndexFromPosition(e.Location);
    var wordRegex = new Regex(@"('w+)");
    var words = wordRegex.Matches(textBox2.Text);
    if (words.Count < 1) return;
    var currentWord = string.Empty;
    for (var i = words.Count - 1; i >= 0; i--)
    {
        if (words[i].Index <= currentTextIndex)
        {
            currentWord = words[i].Value;
            break;
        }
    }
    if (currentWord == string.Empty) return;
    toolTip1.SetToolTip(textBox2, currentWord);
}

把单词放在光标下，我错在哪里

我相信您可能在代码中不小心指定了textBox2而不是targetTextBox。

试着修改如下:

private void txtHoverWord_MouseMove(object sender, MouseEventArgs e)
{
    if (!(sender is TextBox)) return;
    var targetTextBox = sender as TextBox;
    if (targetTextBox.TextLength < 1) return;
    var currentTextIndex = targetTextBox.GetCharIndexFromPosition(e.Location);
    var wordRegex = new Regex(@"('w+)");
    var words = wordRegex.Matches(targetTextBox.Text);
    if (words.Count < 1) return;
    var currentWord = string.Empty;
    for (var i = words.Count - 1; i >= 0; i--)
    {
        if (words[i].Index <= currentTextIndex)
        {
            currentWord = words[i].Value;
            break;
        }
    }
    if (currentWord == string.Empty) return;
    tooltip1.SetToolTip(targetTextBox, currentWord);
}

请注意，我将textBox2更改为targetTextBox，无论它出现在您的代码中。

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