Question

是否有一种简单的方法可以在类似于visual studio中的winforms应用程序中捕获 ctrl + key1 ， key2 事件，例如 ctrl + e ， c =注释掉选定的行？

我目前正在覆盖我的表单OnKeyDown事件：

protected override void OnKeyDown(KeyEventArgs e)
    {
        base.OnKeyDown(e);

        if (e.Control && e.KeyCode.ToString() == "N")
        {
            //do something...
        }
    }

Answer 1

评论中的文章可能是针对WPF的，但其中的想法仍然可以使用

构建一个类，例如

    public class MultiKeyGesture
    {
        private List<Keys> _keys;
        public MultiKeyGesture(IEnumerable<Keys> keys, Keys modifiers)
        {
            _keys = new List<Keys>(keys);

            if (_keys.Count == 0)
            {
                throw new ArgumentException("At least one key must be specified.", "keys");
            }
        }

        private int currentindex;
        public bool Matches(KeyEventArgs e)
        {
            if (_keys[currentindex] == e.KeyCode)
                //at least a partial match
                currentindex++;
            else
                //No Match
                currentindex = 0;
            if (currentindex + 1 > _keys.Count)
            {
                //Matched last key
                currentindex = 0;
                return true;
            }
            return false;
        }
    }

但忽略继承。

使用它

    private MultiKeyGesture Shortcut1 = new MultiKeyGesture(new List<Keys> { Keys.A, Keys.B }, Keys.Control);
    private MultiKeyGesture Shortcut2 = new MultiKeyGesture(new List<Keys> { Keys.C, Keys.D }, Keys.Control);
    private MultiKeyGesture Shortcut3 = new MultiKeyGesture(new List<Keys> { Keys.E, Keys.F }, Keys.Control);

    protected override void OnKeyDown(KeyEventArgs e)
    {
        base.OnKeyDown(e);
        if (Shortcut1.Matches(e))
            BackColor = Color.Green;
        if (Shortcut2.Matches(e))
            BackColor = Color.Blue;
        if (Shortcut3.Matches(e))
            BackColor = Color.Red;
    }

Answer 2

如果你只有两个关键的快捷键，比如VS，你可以存储在变量中按下的最后一个键。

private Keys lastKeyPressed = null;

protected override void OnKeyDown(KeyEventArgs e)
{
    base.OnKeyDown(e);
    if(e.Control && lastKeyPressed != null)
    {
        if(lastKeyPressed == Keys.firstKey && e.KeyCode == Keys.secondKey)
        {
        }
        else if (...) // so on and so forth.
    }
    else if(e.Control)
        lastKeyPressed = e.KeyCode;
}

protected override void OnKeyUp(KeyEventsArgs e)
{
    if(!e.Control)
       lastKeyPressed = null;
}

这将执行两个键快捷键，并在释放ctrl键时重置它。这只是未经测试的伪代码，但它的概念是在保持Ctrl时保存最后按下的键，然后在我尝试传达的ctrl被释放时重置它。

Answer 3

调用e.Modifiers作为控制键，并调用e.KeyCode作为组合键。

private void Form1_KeyUp(object sender, KeyEventArgs e)
{
   // For Tow Key Shortcut.
   if (e.Modifiers == Keys.Control && e.KeyCode == Keys.B)
   {}
   
     // For Triple Key Shortcut.
   if (e.Modifiers.ToString() == (Keys.Shift+", "+Keys.Control) && e.KeyCode == Keys.B)
   {} 
}

// For Form level Key events you must have to set KeyPreview to True;
public Form1()
{
    InitializeComponent();
    this.KeyPreview = true;
}

捕获ctrl +多个键

3 个答案: