Lao Chen WPF

Using system;using system.collections.generic;using system.linq;using system.text;using System.Windows;using System.windows.controls;using system.windows.data;using system.windows.documents;using System.Windows.Input;using System.windows.media;using system.windows.media.imaging;using system.windows.navigation;using System.windows.shapes;using System.io;namespace Lao Chen wpf{///<summary>//MainWindow.xaml interactive logic///</sum Mary> public partial class Mainwindow:window {public MainWindow () {Initializecompone        NT ();        } public static int Count = 0;        public static int right = 0;               int m = 0; private void Button1_Click (object sender, RoutedEventArgs e) {StreamWriter N1 = File.appendtext ("c:\\n1            . txt "); N1.            WriteLine (TextBox1.Text); N1.            Close ();            StreamWriter N2 = File.appendtext ("C:\\n2.txt"); N2.            WriteLine (TextBox2.Text); N2.     Close ();       StreamWriter n3 = File.appendtext ("C:\\n3.txt"); N3.            WriteLine (TextBox3.Text); N3.            Close ();            MessageBox.Show ("success of the title");            TextBox1.Text = "";            TextBox2.Text = "";        TextBox3.Text = ""; } private void Button2_Click (object sender, RoutedEventArgs e) {//Quiz string[] N1 = NE            W string[100];            N1 = File.ReadAllLines ("C:\\n1.txt");            TextBox1.Text = N1[m];            String[] N2 = new string[100];            N2 = File.ReadAllLines ("C:\\n2.txt");            TextBox2.Text = N2[m];            string[] n3 = new STRING[100];            N3 = File.ReadAllLines ("C:\\n3.txt");            TextBox3.Text = N3[m];        m++; }//End private void Button3_Click (object sender, RoutedEventArgs e) {textbox5.text = Main            Window.Count.ToString ();//Total number of topics Textbox6.text = MainWindow.right.ToString (); Textbox7.text = ((Mainwindow.rigHT/(double) (mainwindow.count)) * 100). ToString () + "%";//correct rate} private void Textbox4_keydown (object sender, KeyEventArgs e) {in t a = Int.            Parse (TextBox1.Text); int b = Int.            Parse (TextBox3.Text);            Char C = Convert.tochar (TextBox2.Text);            Class1 con = new Class1 ();            Con.chu (A, B, c); if (E.key = = Key.enter) {if (con.answer = = Int. Parse (Textbox4.text)) {MessageBox.Show ("answer right!") Next question, press the Start button!                    ");                    right++;                count++; } else {MessageBox.Show ("Answer Error! Next question, press the Start button!                    ");                count++;            } textbox4.clear (); }} private void Button1_click_1 (object sender, RoutedEventArgs e) {StreamWriter N1 = Fil            E.appendtext ("C:\\n1.txt"); N1.            WriteLine (TextBox1.Text); N1. Close ();            StreamWriter N2 = File.appendtext ("C:\\n2.txt"); N2.            WriteLine (TextBox2.Text); N2.            Close ();            StreamWriter n3 = File.appendtext ("C:\\n3.txt"); N3.            WriteLine (TextBox3.Text); N3.            Close ();            MessageBox.Show ("success of the title");            TextBox1.Text = "";            TextBox2.Text = "";        TextBox3.Text = ""; }    }}

Packaging

Using system;using system.collections.generic;using system.linq;using system.text;namespace Lao Chen wpf{    class Class1    {public        int sum;        public int answer        {            get            {                return sum;            }        }        public int chu (int n1, int n2, char Fuhao)        {            if (Fuhao = = ' + ')            {                return sum = n1 + n2;            }            else if (Fuhao = = '-')            {                return sum = n1-n2;            }            else if (Fuhao = = ' * ')            {                return sum = n1 * n2;            }            return sum;}}    }

The interface to run is as follows:

Lao Chen WPF