1 private void Form1_Load(object sender, EventArgs e)//这个是调用方法
2 {
3 btnVal0.Click += new EventHandler(btnVal_Click);
4 btnVal1.Click += new EventHandler(btnVal_Click);
5 btnVal2.Click += new EventHandler(btnVal_Click);
6 btnVal3.Click += new EventHandler(btnVal_Click);
7 btnVal4.Click += new EventHandler(btnVal_Click);
8 btnVal5.Click += new EventHandler(btnVal_Click);
9 btnVal6.Click += new EventHandler(btnVal_Click);
10 btnVal7.Click += new EventHandler(btnVal_Click);
11 btnVal8.Click += new EventHandler(btnVal_Click);
12 btnVal9.Click += new EventHandler(btnVal_Click);
13 }
14
15 private void btnVal_Click(object sender, EventArgs e)//此为方法
16 {
17 Button btn =(Button)sender;//sender转换成Button
18 if (num1 == null)
19 {
20 num1 = Convert.ToInt32(btn.Text);
21 }
22 else
23 {
24 num2 = Convert.ToInt32(btn.Text);
25 }
26 tbshow.Text = btn.Text;
27
28 }
