Question

我对c＃相当新，当我按下WASD键时，我想让一个图片框移动，但是图片框拒绝移动。图片框未停靠，锁定或锚定。这是我的代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Imagebox_test1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            int x = pictureBox1.Location.X;
            int y = pictureBox1.Location.Y;

            if (e.KeyCode == Keys.D) x += 1;
            else if (e.KeyCode == Keys.A) x -= 1;
            else if (e.KeyCode == Keys.W) x -= 1;
            else if (e.KeyCode == Keys.S) x += 1;

            pictureBox1.Location = new Point(x, y);
        }
    }
}

我不知道发生了什么事！谢谢你的帮助！

Answer 1

您的代码有两个问题：

将表单的KeyPreview属性设置为true，否则PictureBox将获得KeyDown事件。这阻止了Form1_KeyDown被调用。

此代码块有一个微妙的错误：

if (e.KeyCode == Keys.D) x += 1;
else if (e.KeyCode == Keys.A) x -= 1;
else if (e.KeyCode == Keys.W) x -= 1;
else if (e.KeyCode == Keys.S) x += 1;

如果你仔细观察，你只需修改x坐标。

所有在一起：

public Form1()
{
    InitializeComponent();

    // Set these 2 properties in the designer, not here.
    this.KeyPreview = true;
    this.KeyDown += Form1_KeyDown;
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    int x = pictureBox1.Location.X;
    int y = pictureBox1.Location.Y;

    if (e.KeyCode == Keys.D) x += 1;
    else if (e.KeyCode == Keys.A) x -= 1;
    else if (e.KeyCode == Keys.W) y -= 1;
    else if (e.KeyCode == Keys.S) y += 1;

    pictureBox1.Location = new Point(x, y);
}

Answer 2

您需要将表单的KyePreview属性设置为true，否则表单不会接受该键关闭事件。其次，你只是改变x值而不是y值。完整的代码是

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Imagebox_test1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
KeyPreview = true; 
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            int x = pictureBox1.Location.X;
            int y = pictureBox1.Location.Y;

            if (e.KeyCode == Keys.D) x += 1;
            else if (e.KeyCode == Keys.A) x -= 1;
            else if (e.KeyCode == Keys.W) y -= 1;
            else if (e.KeyCode == Keys.S) y += 1;

            pictureBox1.Location = new Point(x, y);
        }
    }
}

用键盘移动图片框

2 个答案: