1，数据访问层
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;
namespace SQL1
{
class DB1//数据访问层！
{
public SqlConnection conn = new SqlConnection();
public DataSet ds = new DataSet();
public DataTable dt = new DataTable();
public SqlDataAdapter sda = new SqlDataAdapter();
public void dbcon(string constr)//连接数据库！
{
try
{
conn = new SqlConnection(constr);
}
catch(Exception e)
{
MessageBox.Show("数据库连接失败！" +e.ToString());
}
}
public void opens()//打开数据库！
{
conn.Open();
}
public void closes()//关闭数据库！
{
conn.Close();
}
public void Inster(string comstr)//插入数据！
{
SqlCommand comm = new SqlCommand(comstr,conn);
try
{
int a = comm.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("保存成功！");
}
else
{
MessageBox.Show("保存失败！");
}
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
public void Read(string comstr)//读取数据！
{
sda = new SqlDataAdapter(comstr, conn);
sda.Fill(ds);
dt = ds.Tables[0];
}
public void del(string comstr)//删除数据！
{
SqlCommand comm = new SqlCommand(comstr,conn);
int a = comm.ExecuteNonQuery();
if (a > 0)
{
MessageBox.Show("删除失败！");
}
else
{
MessageBox.Show("删除成功！");
}
}
}
}
2，业务逻辑层
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace SQL1
{
class DB2//业务逻辑层
{
DB1 db1 = new DB1();
public string number1;
public string number2;
public string number3;
public string operation1;
public string operation2;
private int i = 0;
string constr = "Data Source=.;Initial Catalog=Tiku1;Integrated Security=True";
public void lianjie()//连接数据库！
{
db1.dbcon(constr);
}
public void charu(string a, string f1, string b, string f2, string c)//插入数据！
{
lianjie();
string comstr = @"insert into Ti(number1,operation1,number2,operation2,number3) values(‘" + a + "‘,‘" + f1 + "‘,‘" + b + "‘,‘"+f2+"‘,‘"+c+"‘)";
db1.opens();
db1.Inster(comstr);
db1.closes();
}
public void duqu(string comstr)//读出题
{
lianjie();
db1.Read(comstr);
if (i < db1.dt.Rows.Count)
{
number1 = db1.dt.Rows[i][0].ToString().Trim();
operation1 = db1.dt.Rows[i][1].ToString().Trim();
number2 = db1.dt.Rows[i][2].ToString().Trim();
operation2 = db1.dt.Rows[i][3].ToString().Trim();
number3 = db1.dt.Rows[i][4].ToString().Trim();
if (i == (db1.dt.Rows.Count - 1))
{
MessageBox.Show("你的题做完了，去休息吧！一会我们继续！");
}
}
i++;
}
public void qingchu(string sltstr)//清除题库
{
lianjie();
db1.opens();
db1.del(sltstr);
db1.closes();
}
public void jisuan(double a, string operation1,double b, string operation2,double c, string rightanswer)
{
bool aa = false;
if (operation1 == "+" || operation1 == "-")
{
if (operation2 == "*" || operation2 == "/")
{
aa = true;
}
else
{
aa = false;
}
}
else
{
aa = false;
}
if (aa == true)
{
Factionsss fass = new Factionsss(operation2);
double answer1 = fass.cal(b, c);
fass = new Factionsss(operation1);
double answer = fass.cal(a, answer1);
if (rightanswer == answer.ToString())
{
MessageBox.Show("回答正确！");
}
else
{
MessageBox.Show("回答错误！");
}
}
else
{
Factionsss fas = new Factionsss(operation1);
double ans = fas.cal(a, b);
fas = new Factionsss(operation2);
double answer = fas.cal(ans, c);
if (rightanswer == answer.ToString())
{
MessageBox.Show("回答正确！");
}
else
{
MessageBox.Show("回答错误！");
}
}
}
}
}
3，表现层代码
form1代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace SQL1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
DB2 db2 = new DB2();
private void button1_Click(object sender, EventArgs e)
{
db2.charu(textBox1.Text, comboBox1.Text, textBox2.Text, comboBox2.Text, textBox3.Text);
textBox1.Clear();
textBox2.Clear();
textBox3.Clear();
}
private void button2_Click(object sender, EventArgs e)
{
string sltstr = @"truncate table Ti";//清除表中数据
db2.qingchu(sltstr);
}
private void button3_Click(object sender, EventArgs e)
{
Form2 fas = new Form2();
fas.ShowDialog();
}
}
}
form2代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace SQL1
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
DB2 db = new DB2();
private void button1_Click(object sender, EventArgs e)
{
chuti();
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
private void textBox4_KeyDown(object sender, KeyEventArgs e)
{
double a = double.Parse(textBox1.Text);
double b = double.Parse(textBox2.Text);
double c = double.Parse(textBox3.Text);
string operation1 = label1.Text;
string operation2 = label2.Text;
if (e.KeyCode == Keys.Enter)
{
db.jisuan(a, operation1, b, operation2, c, textBox4.Text);
textBox4.Clear();
chuti();
}
}
private void Form2_Load(object sender, EventArgs e)
{
chuti();
}
private void chuti()
{
string comstr = @"select number1,operation1,number2,operation2,number3 from Ti";
db.duqu(comstr);
textBox1.Text = db.number1;
textBox2.Text = db.number2;
textBox3.Text = db.number3;
label1.Text = db.operation1;
label2.Text = db.operation2;
}
}
}
4， 计算类以及策略模式的实现
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SQL1
{
interface Iation//定义计算接口
{
double Calation(double a, double b);
}
class Add : Iation//加法
{
public double Calation(double a, double b)
{
return a + b;
}
}
class Sub : Iation//减法
{
public double Calation(double a, double b)
{
return a - b;
}
}
class Mul : Iation//乘法
{
public double Calation(double a, double b)
{
return a * b;
}
}
class Div : Iation//除法
{
public double Calation(double a, double b)
{
if (b == 0)
{
throw new Exception("除数不能为零！");
}
else
{
return a / b;
}
}
}
class Factionsss//实现策略模式！
{
private Iation clation;
public Factionsss(string operation)
{
switch (operation)
{
case "+":
clation = new Add();
break;
case "-":
clation = new Sub();
break;
case "*":
clation = new Mul();
break;
case "/":
clation = new Div();
break;
}
}
public double cal(double a, double b)
{
return clation.Calation(a, b);
}
}
}
5，测试
6.总结：
不知道这样写属不属于三成架构，我倒目前为止是这样理解的！也请老师指正一下！？？？
时间： 2024-11-05 09:20:14