const int N = 4; //按钮的行、列数
Button[,] buttons = new Button[N, N]; //按钮的数组
private void Form1_Load(object sender, EventArgs e)
{
//产生所有按钮
GenerateAllButtons();
}
private void button1_Click(object sender, EventArgs e)
{
//打乱顺序
Shuffle();
}
//打乱顺序
void Shuffle()
{
//多次随机交换两个按钮
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
int a = rnd.Next(N);
int b = rnd.Next(N);
int c = rnd.Next(N);
int d = rnd.Next(N);
Swap(buttons[a, b], buttons[c, d]);
}
}
//生成所有的按钮
void GenerateAllButtons()
{
int x0 = 100, y0 = 10, w = 45, d = 50;
for (int r = 0; r < N; r++)
for (int c = 0; c < N; c++)
{
int num = r * N + c;
Button btn = new Button();
btn.Text = (num + 1).ToString();
btn.Top = y0 + r * d;
btn.Left = x0 + c * d;
btn.Width = w;
btn.Height = w;
btn.Visible = true;
btn.Tag = r * N + c; //这个数据用来表示它所在行列位置
//注册事件
btn.Click += new EventHandler(btn_Click);
buttons[r, c] = btn; //放到数组中
this.Controls.Add(btn); //加到界面上
}
buttons[N - 1, N - 1].Visible = false; //最后一个不可见
}
//交换两个按钮
void Swap(Button btna, Button btnb)
{
string t = btna.Text;
btna.Text = btnb.Text;
btnb.Text = t;
bool v = btna.Visible;
btna.Visible = btnb.Visible;
btnb.Visible = v;
}
//按钮点击事件处理
void btn_Click(object sender, EventArgs e)
{
Button btn = sender as Button; //当前点中的按钮
Button blank = FindHiddenButton(); //空白按钮
//判断是否与空白块相邻，如果是，则交换
if (IsNeighbor(btn, blank))
{
Swap(btn, blank);
blank.Focus();
}
//判断是否完成了
if (ResultIsOk())
{
MessageBox.Show("ok");
}
}
//查找要隐藏的按钮
Button FindHiddenButton()
{
for (int r = 0; r < N; r++)
for (int c = 0; c < N; c++)
{
if (!buttons[r, c].Visible)
{
return buttons[r, c];
}
}
return null;
}
//判断是否相邻
bool IsNeighbor(Button btnA, Button btnB)
{
int a = (int)btnA.Tag; //Tag中记录是行列位置
int b = (int)btnB.Tag;
int r1 = a / N, c1 = a % N;
int r2 = b / N, c2 = b % N;
if (r1 == r2 && (c1 == c2 - 1 || c1 == c2 + 1) //左右相邻
|| c1 == c2 && (r1 == r2 - 1 || r1 == r2 + 1))
return true;
return false;
}
//检查是否完成
bool ResultIsOk()
{
for (int r = 0; r < N; r++)
for (int c = 0; c < N; c++)
{
if (buttons[r, c].Text != (r * N + c + 1).ToString())
{
return false;
}
}
return true;
}