从表格1 C＃关闭表格2

Question

我正在尝试构建一个带有窗体窗口的应用程序，该窗体窗口需要通过按一个按钮来打开和关闭另一个窗体。我希望使用同一按钮来打开和关闭同一窗口。

    private void button1_Click(object sender, EventArgs e)
    {
        //GameBoard gameBoard = new GameBoard(); is written outside the private void as global variable.
        if (gameBoard == open)
        {
            gameBoard Close();
        }
        else
        {
            gameBoard.Show();
        }
    }

感谢您的帮助。

Answer 1

首先将表单引用设置为null。

然后您可以执行以下操作：

    private GameBoard gameBoard = null;

    private void button1_Click(object sender, EventArgs e)
    {
        if (gameBoard == null || gameBoard.IsDisposed)
        {
            gameBoard = new GameBoard();
            gameBoard.Show();
        }
        else
        {
            gameBoard.Close();
            gameBoard = null;
        }
    }