无法将方法添加到按钮单击事件 C# UWP

Question

我在运行 HangMan 游戏时遇到了一些问题。因为我得到了我的按钮，所以我不得不制作一种向用户显示字母表字母的方法。所以我有这种猜测方法，我想将其添加到按钮单击事件中。所以当我尝试向按钮添加方法时，我得到了这条红色的 squiqqly 线。错误在 HangMan_OnLoaded 方法中。谢谢！

        public void DisplayTheWord()
    {
        WrongGuesses = 0;
        BitmapImage Hangman2 = new BitmapImage();
        Uri URL = new Uri(BaseUri, images[WrongGuesses]);
        Hangman2.UriSource = URL;
        picture.Source = Hangman2;
        string[] ReadWords = File.ReadAllLines("EnglishWords.txt");
        int NextNumber = (new Random().Next(words.Length));
        copyCurrent = "";
        current = words[NextNumber];

        for (int i = 0; i < ReadWords[NextNumber].Length; i++)
        {
            copyCurrent += "_" + "   ";
        }
        CopiedWord.Text = copyCurrent;
    }
    private void Hangman_OnLoaded()
    {
        const int btnSize = 35;
        var c = 0;
        for (var i = 65; i <= 90; i++)
        {
            var btn = new Button();
            btn.Content = (char)i;
            btn.Width = btn.Height = btnSize;
            var margin = btn.Margin;
            margin.Left = c += 37;
            btn.Margin = margin;
            GridMain.Children.Add(btn);
            btn.Click += Guessing();
        }

    }
    private void Guessing(object sender, EventArgs e)
    {
        for (var i = 65; i <= 90; i++)
        {
            var btn = new Button();
            btn = sender as Button;
            btn.Content = (char) i;
            var choice = btn.ToString();
            if (copyCurrent.Contains(choice))
            {
                char[] temp = copyCurrent.ToCharArray();
                char[] find = current.ToCharArray();
                char guessChar = choice.ElementAt(0);
                for (int index = 0; index < find.Length; index++)
                {
                    if (find[index]== guessChar)
                    {
                        temp[index] = guessChar;
                    }
                }
                copyCurrent = new string(temp);
            }
            else
            {
                WrongGuesses++;
            }
            if (WrongGuesses < 6)
            {

            }
        }
    }

    private void DisplayCopy()
    {
        CopiedWord.Text = "";
        for (int index = 0; index < copyCurrent.Length; index++)
        {
            CopiedWord.Text += copyCurrent.Substring(index, 1);
            CopiedWord.Text += " ";
        }
    }

Answer 1

您需要删除行中的括号：

btn.Click += Guessing();

所以它变成：

btn.Click += Guessing;

Answer 2

我认为：

错误是因为 Guessing 是无效的并且 return 除了你正在使用 Guessing 就像一个方法 return 一个事件：

btn.Click += Guessing();

对于 dix return 一个价值事件:)

Answer 3

确保您的处理程序适合您要使用的事件：

private void Guessing(object sender, RoutedEventArgs e) {
   //your handler code
}

btn.Click += Guessing;

原因是，每个事件都需要委托人签名并定义参数。

Answer 4

@swatsonpicken 说的对。您需要从行中删除括号：

btn.Click += Guessing();

并替换为：

btn.Click += Guessing;

您还需要更正一件事，那就是

private void Guessing(object sender, EventArgs e)

上面一行写成如下：

private void Guessing(object sender, RoutedEventArgs e)

希望这会有所帮助。 :)

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