c# - 在 C# 中捕获关闭时出错

Question

我试图捕捉我的表单的关闭，以便当用户退出时，它会将“用户已退出”保存到文本文件中，这是我的代码:

private void mainForm_FormClosing(object sender, FormClosingEventArgs e)
   {

        if (String.IsNullOrEmpty(directory))
        {
            Close();
            e.Cancel = false;
        }
        else
        {
            string time = DateTime.Now.ToString("hh:mm");

            TextWriter msg = new StreamWriter(directory, true);

            msg.WriteLine(" (" + time + ") == " + uName + " Has Left The Chat == ");

            msg.Close();

            Close();
            e.Cancel = false;
        }
   }

我的问题是，我得到这个错误:

"Make sure you do not have an infinite loop or infinite recursion"

关于如何解决这个问题有什么想法吗？

Answer 1

您不能在关闭表单时调用 Close() 方法。删除所有 Close() 调用，它将起作用。

private void mainForm_FormClosing(object sender, FormClosingEventArgs e)
{
    if (String.IsNullOrEmpty(directory))
    {
        e.Cancel = false;
    }
    else
    {
        string time = DateTime.Now.ToString("hh:mm");

        using(TextWriter msg = new StreamWriter(directory, true))
        { 
            msg.WriteLine(" (" + time + ") == " + uName + " Has Left The Chat == ");
            msg.Close();
        }
        e.Cancel = false;
    }
}