1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Data;
5 using System.Drawing;
6 using System.Linq;
7 using System.Text;
8 using System.Windows.Forms;
9
10 namespace 计算器
11 {
12 public partial class Form2 : Form
13 {
14 public Form2()
15 {
16 InitializeComponent();
17 }
18 Point p;
19 Point pp;
20 private void Form2_Load(object sender, EventArgs e)
21 {
22 Button btn;
23 Label lbl = new Label();
24 lbl.Name = "lblname";
25 lbl.Location = new Point(50,10);//定位置
26 lbl.Size = new Size(250,30);//定尺寸
27 TextBox txt = new TextBox();
28 txt.Name = "txtName";
29 txt.BorderStyle = BorderStyle.FixedSingle;//设置样式
30 txt.Location = new Point(50,30);
31 txt.Size = new Size(250,50);
32 txt.Multiline = true;//设置为多行文本框
33 Button btn0 = new Button();
34 btn0.SetBounds(p.X+50,p.Y+230,150,50);//设置位置和尺寸
35 btn0.Tag = 0;
36 btn0.Visible = true;
37 btn0.Text = 0 + "";
38 btn0.Click += new EventHandler(btn_Click);//手动添加事件
39 Button btnJ = new Button();
40 btnJ.SetBounds(p.X+200,p.Y+80,50,50);
41 btnJ.Tag = "+";
42 btnJ.Text = "+";
43 btnJ.Click += new EventHandler(btn_Click);
44 Button btnJan = new Button();
45 btnJan.SetBounds(p.X + 200, p.Y + 130, 50, 50);
46 btnJan.Tag = "-";
47 btnJan.Text = "-";
48 btnJan.Click += new EventHandler(btn_Click);
49 Button btnC = new Button();
50 btnC.SetBounds(p.X + 200, p.Y + 180, 50, 50);
51 btnC.Tag = "*";
52 btnC.Text = "*";
53 btnC.Click += new EventHandler(btn_Click);
54 Button btnChu = new Button();
55 btnChu.SetBounds(p.X + 200, p.Y + 230, 50, 50);
56 btnChu.Tag = "/";
57 btnChu.Text = "/";
58 btnChu.Click += new EventHandler(btn_Click);
59 Button btnQ = new Button();
60 btnQ.SetBounds(p.X + 250, p.Y + 80, 50, 50);
61 btnQ.Tag = "C";
62 btnQ.Text = "C";
63 btnQ.Click += new EventHandler(btn_Click);
64 Button btnD = new Button();
65 btnD.SetBounds(p.X + 250, p.Y + 130, 50, 150);
66 btnD.Tag = "=";
67 btnD.Text = "=";
68 btnD.Click += new EventHandler(btn_Click);
69 for (int i = 1; i <=9; i++)
70 {
71 btn = new Button();
72 btn.SetBounds(p.X+50, p.Y+80, 50, 50);
73 btn.Text = i+"";
74 btn.Tag = i ;
75 btn.Visible = true;
76 btn.Click += new EventHandler(btn_Click);
77 this.Controls.Add(btn);
78 p.X += 50;
79 if (p.X >= 150)//如果横向尺寸大于150，那么就换行（3个按钮刚好150尺寸）
80 {
81 p.X = 0;
82 p.Y += 50;//纵向移动
83 }
84 }
85 this.Controls.Add(txt);//在面板中添加文本框
86 this.Controls.Add(btn0);//添加按钮0
87 this.Controls.Add(btnJ);//添加+加号按钮
88 this.Controls.Add(btnJan);//添加-减号按钮
89 this.Controls.Add(btnC);//添加*乘法按钮
90 this.Controls.Add(btnChu);//添加/除法按钮
91 this.Controls.Add(btnQ);//添加C清空按钮
92 this.Controls.Add(btnD);//添加=号按钮
93 this.Controls.Add(lbl);//添加lable
94 }
95 private void btn_Click(object sender, EventArgs e)
96 {
97
98 Button btn = (Button)sender;
99 /*linq写法*/
100 string str = this.Controls.OfType<TextBox>().Single(item => item.Name == "txtName").Text;
101 string str1 = this.Controls.OfType<Label>().Single(item => item.Name == "lblname").Text;
102 /*一般的写法*/
103 TextBox txt = this.Controls.Find("txtName", true)[0] as TextBox;
104 Label lbl = this.Controls.Find("lblname", true)[0] as Label;
105 str1+=btn.Tag.ToString();
106 lbl.Text = str1;
107 if (str1.IndexOf('=') != -1)//如果字符里面有=号
108 {
109 str1 = str1.Substring(0,str1.Length-1);//把=号截取掉
110
111 if (str1.IndexOf('+') != -1)//如果剩下的字符串里面有+号
112 {
113 string[] nums = str1.Split('+');//把+号的前后字符串分割并装到数组
114 int sum = 0;
115 foreach (var num in nums)//循环遍历数组
116 {
117 sum += Convert.ToInt32(num);
118 }
119 txt.Text = sum.ToString();//文本框获得结果
120 lbl.Text = "";//清空lable里的内容
121 }
122 if (str1.IndexOf('-') != -1)
123 {
124 string[] nums = str1.Split('-');
125 int subtr = 0;
126 foreach (var num in nums)
127 {
128 subtr -= Convert.ToInt32(num);
129 }
130 txt.Text = subtr.ToString();
131 lbl.Text = "";
132 }
133 if (str1.IndexOf('*') != -1)
134 {
135 string[] nums = str1.Split('*');
136 int mult = 1;
137 foreach (var num in nums)
138 {
139 mult *= Convert.ToInt32(num);
140 }
141 txt.Text = mult.ToString();
142 lbl.Text = "";
143 }
144 if (str1.IndexOf('/') != -1)
145 {
146 string[] nums = str1.Split('/');
147 int division = 1;
148 for (int i = 0; i < nums.Length-1; i++)
149 {
150 division= Convert.ToInt32(nums[i])/Convert.ToInt32(nums[nums.Length-1]);
151 }
152 //foreach (var num in nums)
153 //{
154 // division /= Convert.ToInt32(num);
155 //}
156 txt.Text = division.ToString();
157 lbl.Text = "";
158 }
159 }
160 if (str1.IndexOf('C') != -1)
161 {
162 lbl.Text = "";
163 txt.Text = "";
164 }
165
166
167
168
169 // MessageBox.Show(str);
170 }
171 }
172 }
