Wpf+数据库代码封装+策略模式封装

运行界面：

数据库保存的题：

数据库封装代码：

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.Data.SqlClient;
using System.Data;
namespace WpfApplication1
{
    class shujuku
    {
        public string str = @"Data Source=.;Initial Catalog=四则运算;Integrated Security=True;Pooling=False";
        public SqlConnection sqlcon = new SqlConnection();
        public SqlDataAdapter sda = new SqlDataAdapter();
        public DataSet ds = new DataSet();
        public DataTable dt = new DataTable();
        public string x1;
        public string x2;
        public string x3;
        public string x4;
        public string x5;
        public string x6;
        public string x7;
        public string x8;
        public void dbcon()
        {
            try
            {
                sqlcon = new SqlConnection(str);

            }
            catch (Exception ex)
            {
                MessageBox.Show("数据链接不成功"+ex.Message);
            }
        }

        public void ChuTi()
        {
            dbcon();
            sqlcon.Open();
            string sqltr = "insert into Table2(第一个数,符号,第二个数) values('" + x1 + "','" + x2 + "','" + x3 + "')";
            SqlCommand comm = new SqlCommand(sqltr, sqlcon);
            try
            {
                comm.ExecuteNonQuery();
                MessageBox.Show("出题成功！");

            }
            catch (Exception ex)
            {
                MessageBox.Show("出题失败" + ex.ToString());
            }
            sqlcon.Close();
        }
        public void ShanChu()
        {
            dbcon();
            sqlcon.Open();
            string sqltr = "delete from Table2";
            SqlCommand comm = new SqlCommand(sqltr, sqlcon);
            try
            {
                comm.ExecuteNonQuery();
                MessageBox.Show("删除成功");
            }
            catch (Exception ex)
            {
                MessageBox.Show("删除失败" + ex.ToString());
            }

            SqlDataReader reder = comm.ExecuteReader();
            sqlcon.Close();
        }
        public void JiSuan()
        {

            int i = int.Parse(x4);
            dbcon();
            sqlcon.Open();
            string sqltr = "select * from Table2 ";
            SqlCommand comm = new SqlCommand(sqltr, sqlcon);
            SqlDataAdapter da = new SqlDataAdapter(comm);
            DataSet ds = new DataSet();
            da.Fill(ds);
            DataTable dt = ds.Tables[0];
            x5 = dt.Rows[i][0].ToString();
            x6 = dt.Rows[i][1].ToString();
            x7 = dt.Rows[i][2].ToString();
            sqlcon.Close();
        }
        public void DaoRu()
        {
            dbcon();
            sqlcon.Open();
            string sqltr = "select * from Table2 ";
            SqlCommand comm = new SqlCommand(sqltr, sqlcon);
            SqlDataAdapter da = new SqlDataAdapter(comm);
            DataSet ds = new DataSet();
            da.Fill(ds);
            DataTable dt = ds.Tables[0];
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                dt.Rows[i][0].ToString();
                dt.Rows[i][1].ToString();
                dt.Rows[i][2].ToString();
                x8 += dt.Rows[i][0].ToString().Trim() + dt.Rows[i][1].ToString().Trim() + dt.Rows[i][2].ToString().Trim() + "\n";
            }
            sqlcon.Close();
        }

    }
}

wpf代码：

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.Data.SqlClient;
using System.Data;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        public static int Count = 0;
        public static int zhengque = 0;
        public static int lefttime;
        public static int sum;
        shujuku sj = new shujuku();
        private void button1_Click(object sender, RoutedEventArgs e)
        {

            sj.x1 = left.Text;
            sj.x2 = fuhao.Text;
            sj.x3 = right.Text;
            sj.ChuTi();
            string f = fuhao.Text;
            switch (f)
            {
                case "+":
                    sum = int.Parse(left.Text) + int.Parse(right.Text);
                    daan1.Text += sum + "\r\n";

                    break;
                case "-":
                    sum = int.Parse(left.Text) - int.Parse(right.Text);

                    daan1.Text += sum + "\r\n";
                    break;
                case "*":
                    sum = int.Parse(left.Text) * int.Parse(right.Text);

                    daan1.Text += sum + "\r\n";
                    break;
                case "/":
                    sum = int.Parse(left.Text) / int.Parse(right.Text);

                    daan1.Text += sum + "\r\n";
                    break;
                default:
                    break;

            }
            left.Clear();
            fuhao.Clear();
            right.Clear();
        }

        private void button2_Click(object sender, RoutedEventArgs e)
        {
            sj.ShanChu();

        }

        private void button4_Click(object sender, RoutedEventArgs e)
        {
             sj.x4=textBox5.Text;
             textBox1.Text= sj.x5;
            textBox2.Text=  sj.x6;
             textBox3.Text=sj.x7 ;
            sj.JiSuan();

        }

        private void button5_Click(object sender, RoutedEventArgs e)
        {
            if (daan1.Text == "显示答案")
            {
                daan1.Visibility = Visibility.Visible;
                daan1.Text = "隐藏答案";
            }
            else if (daan1.Text == "隐藏答案")
            {
                daan1.Visibility = Visibility.Hidden;
                daan1.Text = "显示答案";

            }
        }

        private void button3_Click(object sender, RoutedEventArgs e)
        {
            textBox6.Text = sj.x8;
            sj.DaoRu();
        }

        private void textBox4_KeyDown(object sender, KeyEventArgs e)
        {
            tiaoyong ty = new tiaoyong();
            string fuha = textBox2.Text;
            ty.c = int.Parse(textBox1.Text);
            ty.n = int.Parse(textBox3.Text);
            ty.yunsuan(fuha);
            if (e.Key == Key.Enter)
            {
                if (textBox4.Text == ty.result.ToString())
                {
                    MessageBox.Show("回答正确");
                    zhengque++;
                }
                else
                {
                    MessageBox.Show("回答错误");
                }
                textBox4.Clear();

            }

        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            shujuku sj = new shujuku();
        }

    }
}

策略封装代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace WpfApplication1
{

          public interface ITaxStragety
        {
        int Calcul(int a,int b);

        }
   class Class2 : ITaxStragety
    {

      public  int Calcul(int a, int b)
        {
            return  a + b;
        }

    }
   class sub : ITaxStragety
    {
      public int Calcul(int a, int b)
       {
           return  a - b;
       }

   }
   class sheng : ITaxStragety
   {
      public int Calcul(int a, int b)
       {
           return a *b;

       }
   }
    class chu : ITaxStragety
   {
     public int Calcul(int a, int b )
       {
           return a / b;

       }
   }
     class tiaoyong
     {
         public int result = 0;
         public int c=0;
         public int n=0;
         public void yunsuan(string m)
         {
             if (m == "+")
             {
                 Class2 jia = new Class2();
                 result = jia.Calcul(c, n);
             }
             if (m == "-")
             {
                 sub su = new sub();
                 result = su.Calcul(c, n);
             }
             if (m == "*")
             {
                 sheng sh = new sheng();
                 result = sh.Calcul(c, n);

             }
             if (m == "/")
             {

                 chu ch = new chu();
                 result = ch.Calcul(c, n);

             }

         }
     }

}