c#-使用箭头键移动PictureBox-处理PictureBox中的键盘事件

我有一个PictureBox,可在其中使用以下代码移动对象.我需要在表单中添加一些按钮,但是,当我启动程序时,箭头键会在按钮中导航,而不是在输入按键中导航.我已经尝试了很多
像Form.Load()上的PictureBox.Focus()和PictureBox.Select()之类的方法,并在此答案here上完全禁用箭头键导航,但我的对象将不再移动.

private void UpdateScreen(object sender, EventArgs e) {

    if (Input.KeyPressed(Keys.Right) && Settings.direction != Direction.Left) {
        Settings.direction = Direction.Right;
    }
    else if (Input.KeyPressed(Keys.Left) && Settings.direction != Direction.Right) {
        Settings.direction = Direction.Left;
    }  
    else if (Input.KeyPressed(Keys.Up) && Settings.direction != Direction.Down) {
        Settings.direction = Direction.Up;
    }
    else if (Input.KeyPressed(Keys.Down) && Settings.direction != Direction.Up) {
        Settings.direction = Direction.Down;
    }
}

如何仅禁用所有按钮的方向键导航,而又不影响UpdateScreen()中的代码？

解决方法:

PictureBox控件是不可选择的,因此无法处理键盘事件.要解决此问题,您首先应该使控件成为可选择的：

using System;
using System.Windows.Forms;
class SelectablePictureBox : PictureBox
{
    public SelectablePictureBox()
    {
        SetStyle(ControlStyles.Selectable, true);
        SetStyle(ControlStyles.UserMouse, true);
        TabStop = true;
    }

    protected override void OnEnter(EventArgs e)
    {
        base.OnEnter(e);
        this.Invalidate();
    }
    protected override void OnLeave(EventArgs e)
    {
        base.OnLeave(e);
        this.Invalidate();
    }
    protected override void OnPaint(PaintEventArgs pe)
    {
        base.OnPaint(pe);
        if (this.Focused)
            ControlPaint.DrawFocusRectangle(pe.Graphics, ClientRectangle);
    }
}

然后,您可以处理它的PreviewKeyDown事件：

private void selectablePictureBox1_PreviewKeyDown(object sender,
    PreviewKeyDownEventArgs e)
{
    if (e.KeyCode == Keys.Left)
    {
        e.IsInputKey = true;
        myPictureBox1.Left -= 10;
    }
    else if (e.KeyCode == Keys.Right)
    {
        e.IsInputKey = true;
        myPictureBox1.Left += 10;
    }
}

标签：picturebox,keypress,c,net,winforms
来源： https://codeday.me/bug/20191110/2013510.html