C# PigLatin翻译程序崩溃C

由于某种原因，当我运行这段代码时，我注意到字母I或I或单词it使程序崩溃。此外，当我只需单击“翻译”而未输入任何内容时，它也会崩溃。我已经一遍又一遍地检查了这个代码，但是我找不到问题所在。有什么建议吗

public partial class Form1 : Form
    {
       public Form1()
       {
           InitializeComponent();
       }

    private void Form1_Load(object sender, EventArgs e)
    {

    }


    private void btnTranslate_Click(object sender, EventArgs e)
    {

        String input = Convert.ToString(txtInput.Text.Trim());
        String inputTr = Regex.Replace(input, " {2,}", " ");
        String pigLatin = "";
        String temp = "";
        String restOfWord = "";
        String vowels = "AEIOUaeiou";
        String consonants = "YBCDFGHJKLMNPQRSTVXWZbcdfghjklmnpqrstvxwzy";

        string[] words = inputTr.Split();
        foreach (string word in words)
        {
            if (string.IsNullOrEmpty(txtInput.Text))
            {
                MessageBox.Show("Text must be entered");
            }

            int index = word.IndexOfAny(new char[] { 'A', 'E', 'I', 'O', 'U', 'a', 'e', 'i', 'o', 'u' });

            if (Regex.IsMatch(word, "[@#$%0-9]"))
            {
                pigLatin += word + " ";
            }

            else if (!(char.IsPunctuation(word.Last())) && vowels.Contains(word[0]) && word.Contains(word.Substring(1, 2).ToLower()))

            {
                pigLatin += word + "way" + " ";
            }
            else if (char.IsPunctuation(word.Last()) && vowels.Contains(word[0]) && word.Contains(word.Substring(1, 2).ToLower()))

            {
                pigLatin += word.Substring(0, word.Length - 1) + "way" + word.Last() + " ";
            }
            else if (!(char.IsPunctuation(word.Last())) && consonants.Contains(word[0]) && word.StartsWith(word.Substring(0, 1).ToLower()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                pigLatin += restOfWord + firstPart + "ay" + " ";
            }

            else if (char.IsPunctuation(word.Last()) && consonants.Contains(word[0]) && word.StartsWith(word.Substring(0, 1).ToLower()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                pigLatin += restOfWord.Substring(0, restOfWord.Length - 1) + firstPart + "ay" + restOfWord.Last() + " ";
            }

            else if (!(char.IsPunctuation(word.Last())) && word.Contains(word.ToUpper()) && vowels.Contains(word.Substring(0, 1).ToUpper()))
            {

                pigLatin += word + "WAY" + " ";

            }
            else if (char.IsPunctuation(word.Last()) && word.Contains(word.ToUpper()) && vowels.Contains(word.Substring(0, 1).ToUpper()))
            {

                pigLatin += word.Substring(0, word.Length - 1) + "WAY" + word.Last() + " ";

            }
            else if (!(char.IsPunctuation(word.Last())) && word.StartsWith(word.Substring(0, 1).ToUpper()) && consonants.Contains(word.Substring(0, 1).ToUpper()) && word.Contains(word.Substring(1, 2).ToLower()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                pigLatin += restOfWord.Substring(0, 1).ToUpper() + restOfWord.Substring(1, restOfWord.Length - 1).ToLower() + firstPart.ToLower() + "ay" + " ";
            }

            else if (char.IsPunctuation(word.Last()) && word.StartsWith(word.Substring(0, 1).ToUpper()) && consonants.Contains(word.Substring(0, 1).ToUpper()) && word.Contains(word.Substring(1, 2).ToLower()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                temp = restOfWord.Substring(0, 1).ToUpper() + restOfWord.Substring(0, restOfWord.Length - 1).ToLower() + firstPart.ToLower() + "ay" + restOfWord.Last() + " ";
                temp = temp.Remove(0, 1);
                pigLatin += temp.Substring(0, 1).ToUpper() + temp.Substring(1, temp.Length - 1).ToLower() + " ";
            }

            else if (!(char.IsPunctuation(word.Last())) && word.Contains(word.ToUpper()) && consonants.Contains(word.Substring(0, 1).ToUpper()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                pigLatin += restOfWord.ToUpper() + firstPart.ToUpper() + "AY" + " ";
            }

            else if (char.IsPunctuation(word.Last()) && word.Contains(word.ToUpper()) && consonants.Contains(word.Substring(0, 1).ToUpper()))
            {
                string firstPart = word.Substring(0, index);
                restOfWord = word.Substring(index, word.Length - index);
                pigLatin += restOfWord.Substring(0, restOfWord.Length - 1).ToUpper() + firstPart.ToUpper() + "AY" + word.Last() + " ";
            }
            txtOutput.Text = pigLatin;
        }

    }

    private void btnClear_Click(object sender, EventArgs e)
    {
        txtInput.Text = "";
        txtOutput.Text = "";
        txtInput.Focus();
    }
    private void btnExit_Click(object sender, EventArgs e)
    {
        this.Close();
    }

    private void txtInput_TextChanged(object sender, EventArgs e)
    {

    }
}

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在代码中的几个地方都有子字符串1、2—如果当前处理的单词短于三个字符，则会出现异常，因为您试图获取超出字符串末尾的子字符串

您需要在代码中添加长度检查。 e、 g

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正如调试注意事项一样，您可以在异常发生的行上放置一个条件断点，然后在即时窗口“复制和粘贴”中检查if语句的每个单独部分，以查看导致异常的子句。

Crash=exception。你必须告诉我们哪一个和哪一行。它有什么例外？获取调用堆栈？InvalidOperationException发生异常引发：“System.Core.dll@CallumBradburyelse if！中的System.InvalidOperationException！”！char.ispuncationword.Last&&vouels.containsSwarm[0]&&word.containsSwarm.Substring1，2.ToLower@Sinatr它位于highlights@KenYoung,您可以将问题添加到所需的相关详细信息中：完整的异常文本，包括消息和调用堆栈，以及标记代码行，例如注释say//here。加上if string.IsNullOrEmptytxtInput.text应放在方法的开头，foreach之外，加上txtOutput.text=pigLatin；应该放在foreach之后…@PaulF我已经搞了10个小时了。。。你能帮我添加长度检查代码吗？我理解你对子字符串的意思。对于延迟，我很抱歉-我不确定你在检查2个字符的子字符串时要做什么，但简单的解决方法是在尝试获取子字符串之前在if语句中插入word.Length>=3-请参见上面的编辑。

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else if (!(char.IsPunctuation(word.Last())) && vowels.Contains(word[0]) &&
&& (word.Length >= 3) && word.Contains(word.Substring(1, 2).ToLower()))
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