通过键盘显示和隐藏窗体 C#

Question

我有一个表单，我想在按 F1 时显示和隐藏我的表单，我尝试使用 Global Low Level Keyboard Hook 按照本教程进行操作： https://www.codeproject.com/articles/19004/a-simple-c-global-low-level-keyboard-hook

我按 1x 表单隐藏，如果我再次按显示表单不久之后它不起作用。

namespace MyForm
{
    public partial class Form1 : MetroForm
    {    
        public Form1()
        {
            InitializeComponent();                
        }

        globalKeyboardHook gkh = new globalKeyboardHook();
        private void Form1_Load(object sender, EventArgs e)
        {
            gkh.HookedKeys.Add(Keys.F1);
            gkh.KeyDown += new KeyEventHandler(gkh_KeyDown);

            gkh.KeyUp += new KeyEventHandler(gkh_KeyUp);               
        }

       void gkh_KeyUp(object sender, KeyEventArgs e)
       {
           this.Show();
           e.Handled = true;                
        }

        void gkh_KeyDown(object sender, KeyEventArgs e)
        {
            this.Hide();
            e.Handled = true;    
        }

        private void Form1_Closing(object sender, EventArgs e)
        {
            gkh.unhook();
        }
    }
}

感谢任何帮助

Answer 1

你正在做的是同时按下按钮和释放按钮，这样它会同时触发两个事件而不是像这样做

public static bool flag = true;
        public Form1()
        {
            InitializeComponent();

        }
        globalKeyboardHook gkh = new globalKeyboardHook();

        private void Form1_Load(object sender, EventArgs e)
        {
            gkh.HookedKeys.Add(Keys.F1);
            gkh.KeyDown += new KeyEventHandler(gkh_KeyDown);

        }

        void gkh_KeyDown(object sender, KeyEventArgs e)
        {
            if (flag)
            {
                this.Hide();
                flag = false;
            }
            else
            {
                this.Show();
                flag = true;
            }

            e.Handled = true;
        }

        private void Form1_Closing(object sender, EventArgs e)
        {
            gkh.unhook();
        }

你必须在一个事件中处理它，这将是 keydown 因为你正在按 f1 而且我还添加了标志来检查表单是否隐藏它会显示，如果表单显示隐藏它

通过键盘显示和隐藏窗体 C#

show and hide form by keyboard c#

.net

c#

keyboard-hook