WPF计算

设计思路：

用WPF窗体设计，在第一个数和第二个数的文本框中输入数值，单击录题按钮，数值保存在n1,n2文档中,把要做的题都保存完后，单击开始按钮，开始做题，每做完一道题，按Enter键，进入下一题，同时提示回答是否正确。如果在时间内做完题就单击结束按钮，弹出对话框“答题结束” 总计，正确的个数及正确率显示出来。

MainWindow.xaml设计为:

代码为：

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 using System.Windows;
  6 using System.Windows.Controls;
  7 using System.Windows.Data;
  8 using System.Windows.Documents;
  9 using System.Windows.Input;
 10 using System.Windows.Media;
 11 using System.Windows.Media.Imaging;
 12 using System.Windows.Navigation;
 13 using System.Windows.Shapes;
 14 using System.IO;
 15
 16
 17
 18 namespace xiaoshitou
 19 {
 20     /// <summary>
 21     /// MainWindow.xaml 的交互逻辑
 22     /// </summary>
 23     public partial class MainWindow : Window
 24     {
 25         public MainWindow()
 26         {
 27             InitializeComponent();
 28         }
 29         public static int Count = 0;//总计的个数
 30         public static int right = 0;//正确的个数
 31         int n = 0;
 32         private void button1_Click(object sender, RoutedEventArgs e)
 33         {
 34             label4.Content = "+";
 35
 36         }
 37
 38         private void button2_Click(object sender, RoutedEventArgs e)
 39         {
 40             label4.Content = "-";
 41
 42         }
 43
 44         private void button3_Click(object sender, RoutedEventArgs e)
 45         {
 46             label4.Content = "-";
 47             ;
 48         }
 49
 50         private void button4_Click(object sender, RoutedEventArgs e)
 51         {
 52             label4.Content = "-";
 53
 54         }
 55
 56         private void button5_Click(object sender, RoutedEventArgs e)
 57         {
 58
 59             StreamWriter n1 = File.AppendText("n1.txt");//第一个数存入第一文档
 60             n1.WriteLine(textBox1.Text);
 61             n1.Close();
 62             StreamWriter n2 = File.AppendText("n2.txt");//第二个数存入第二个文档
 63             n2.WriteLine(label4.Content);
 64             n2.Close();
 65             StreamWriter n3 = File.AppendText("n3.txt");//结果存入第三个文档
 66             n3.WriteLine(textBox2.Text);
 67             n3.Close();
 68             textBox1.Clear();
 69             textBox2.Clear();
 70             textBox3.Clear();
 71             MessageBox.Show("录题成功");
 72         }
 73
 74         private void button6_Click(object sender, RoutedEventArgs e)
 75         {
 76
 77             string[] n1 = new string[100];
 78             n1 = File.ReadAllLines("n1.txt");//数值一的文档
 79             textBox1.Text = n1[n];
 80             string[] n2 = new string[100];
 81             n2 = File.ReadAllLines("n2.txt");
 82             label4.Content = n2[n];
 83             string[] n3 = new string[100];
 84             n3 = File.ReadAllLines("n3.txt");
 85             textBox2.Text = n3[n];
 86             n++;
 87         }
 88
 89         private void button7_Click(object sender, RoutedEventArgs e)
 90         {            textBox3.IsEnabled = false;
 91             MessageBox.Show("运算结束！");
 92             textBox4.Text = Count.ToString();//题目总数
 93             textBox5.Text =right.ToString();//正确的个数
 94             textBox6.Text = ((right / (double)(Count)) * 100).ToString() + "%";//正确率
 95         }
 96
 97
 98
 99         private void textBox3_KeyDown(object sender, KeyEventArgs e)
100         {
101             int a = int.Parse(textBox1.Text);
102             int b = int.Parse(textBox2.Text);
103             Char c = Convert.ToChar(label4.Content);
104             Class1 con = new Class1();
105             con.js(a, b, c);
106             if (e.Key == Key.Enter)
107             {
108                 if (con.y1 == int.Parse(textBox3.Text))
109                 {
110                     MessageBox.Show("回答正确！下一题请按开始按钮！");
111                     right++;
112                     Count++;
113                 }
114
115                 else
116                 {
117
118                     MessageBox.Show("回答错误！下一题请按开始按钮！");
119                     Count++;
120
121                 }
122                 //清空
123                 textBox3.Clear();
124                 textBox1.Clear();
125                 textBox2.Clear();
126
127             }
128         }
129     }
130 }

Class.cs代码

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5
 6 namespace xiaoshitou
 7 {
 8     class Class1
 9     {
10         public int result;
11         public int y1
12         {
13             get
14             {
15                 return result;
16             }
17         }
18
19         public int js(int n1, int n2, char mark)
20         {
21             if (mark == ‘+‘)
22             {
23                 return result = n1 + n2;
24             }
25             else if (mark == ‘-‘)
26             {
27                 return result = n1 - n2;
28             }
29             else if (mark == ‘*‘)
30             {
31                 return result = n1 * n2;
32             }
33             else if (mark == ‘/‘)
34             {
35                 return result = n1 / n2;
36             }
37             return result;
38         }
39     }
40 }

运行过程的各部分显示为以下图片：