c# - 确定 Windows 窗体应用程序中的插入模式

Question

我想检查 C# Windows 窗体应用程序中 Insert 键的状态。这是最少的代码(不起作用；形成两个 RadioButtons):

using System;
using System.Windows.Forms;

using System.Windows.Input;
// Also added PresentationCore and WindowsBase refereneces

namespace InsertModeDemo1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            if (Keyboard.IsKeyToggled(Key.Insert))
                radioButtonInsert.Checked = true;
            else
                radioButtonOverstrike.Checked = true;
        }
    }
}

Answer 1

尝试改用 Control.IsKeyLocked。

private void Form1_Load(object sender, EventArgs e)
{
  if (Control.IsKeyLocked(Keys.Insert))
    radioButtonInsert.Checked = true;
  else
    radioButtonOverstrike.Checked = true;
}

引用文献:Control.IsKeyLocked

注意

The documentation says the method only works with CAPS LOCK, NUM LOCK, or SCROLL LOCK key only. But testing the method with Keys.Insert has proven that it also work for INSERT key.