c# - 我如何将 2 个单独的按键识别为一个键？

Question

所以对于我正在工作的游戏，我有一堆不同的键来做不同的事情(例如 w 键让玩家向上看，e 键让角色向上看)。

我想知道有没有办法让 W + D 键让玩家向上看，即使这些键已经被使用。

private void FrmGM_KeyDown(object sender, KeyEventArgs e)
    {            
        if (e.KeyCode == Keys.W)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player1));
            bulletnumb = 1;
        }

        if (e.KeyCode == Keys.E)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player2));
            bulletnumb = 2;
        }

        if (e.KeyCode == Keys.D)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player3));
            bulletnumb = 3;
        }

        if (e.KeyCode == Keys.C)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player4));
            bulletnumb = 4;
        }

        if (e.KeyCode == Keys.X)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player5));
            bulletnumb = 5;
        }

        if (e.KeyCode == Keys.Z)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player6));
            bulletnumb = 6;
        }

        if (e.KeyCode == Keys.A)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player7));
            bulletnumb = 7;
        }

        if (e.KeyCode == Keys.Q)
        {
            picplayer.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.IPT_game_player8));
            bulletnumb = 8;
        }

这是我按键的代码

Answer 1

当 KeyDown 事件到达时，将字母存储在一个集合中，并在 KeyUp 事件处理程序中删除它们。这样您的 KeyDown 就能够“看到”是否按下了“配套键”:

private readonly ISet<char> keysCurrentlyDown = new HashSet<char>();

private void FrmGM_KeyDown(object sender, KeyEventArgs e) {            
    if (e.KeyCode == Keys.W)
    {
        if (keysCurrentlyDown.Contains('D')) {
            // Call some method to handle W+D
        } else {
            ...
        }
        keysCurrentlyDown.Add('W');
    } else if (e.KeyCode == Keys.D)
    {
        if (keysCurrentlyDown.Contains('W')) {
            // Call some method to handle W+D
        } else {
            ...
        }
        keysCurrentlyDown.Add('D');
    }
    ...
}
private void FrmGM_KeyUp(object sender, KeyEventArgs e) {            
    if (e.KeyCode == Keys.W) {
        keysCurrentlyDown.Remove('W');
    } else if (e.KeyCode == Keys.D) {
        keysCurrentlyDown.Remove('D');
    } ...
}

}