【C#重构】——充值

男娘i 2022-05-12 14:34 180阅读 0赞

教师端功能：实现对学生卡号的充值  
用到的表：student\_info 查询相应卡号学生信息；recharge\_info充值记录表

## recharge\_info充值记录表 ##

![在这里插入图片描述][70]

![在这里插入图片描述][70 1]  
**UI**

public partial class frmTRecharge : Form
        {
             //窗体默认
            public frmTRecharge()
            {
                InitializeComponent();
            }
            
           //点击注册
            private void btnRecharge_Click(object sender, EventArgs e)
            {
                if (txtCardNO.Text.Trim ()=="" || txtRecharge.Text.Trim()=="")
                {
                    MessageBox.Show ("请把信息填写完整");
                }
                //实例化实体层的studnetinfo类和rechargeinfo类
                Entity.StudentInfo student = new Entity.StudentInfo();
                Entity.RechargeInfo money = new Entity.RechargeInfo();
                money.UserID = Convert.ToInt32(txtCardNO.Text.Trim());
                money.Addmoney = Convert.ToInt32(txtRecharge.Text.Trim());
                student.UserID = money.UserID;
    
                DataTable table;
                //查询student表的UserID
                DataTable table1;
                //DataTable table2;
                //实例化外观层
                Facade.RechargeFacade facade = new Facade.RechargeFacade();
                //外观层的查询UserID
                table1 = facade.SelectStudentFacade(student);
                //判断查找到用户输入的UserID是否在使用状态
                if (table1.Rows[0][7].ToString().Trim()=="正使用")
                {
                    //如果卡号的状态是正在使用的haul，那就找到status和balance返回回来
                    //cash 暂存一个变量等待和充值的前进行加和，状态写在客户端窗体上
                    //存在问题：如果这个卡号涉及到是否结账，还需要增加什么内容？
                    //如果这个卡号已经注销了怎么进行判断？
    
                    if (table1.Rows[0][4].ToString()!="")
                    {
                        //查到的状态赋值到recharge表的status列
                        student.Status=table1.Rows[0][4].ToString();
                        //查到的学生余额暂时存放在balance中
                        student.Balance= Convert.ToInt32(table1.Rows[0][2].ToString());
                        int a = student.Balance;
                        int b = money.Addmoney;
                        //增加表信息内容
                        money.Status = student.Status;
                        table = facade.InsertRechargeFacade(money);
                        int c = a + b;
                        student.Balance = c;
                        //table2 = facade.UpdateStudentFacade(student); 
                        //更新student表之后得到的new balance 和固定还是临时用户 显示在在窗体上
                        txtBalance.Text = Convert.ToString(student.Balance);
                        cmbState.Text = student.Status;
                        MessageBox.Show("充值成功");
                    }
                    else
    	            {
                        MessageBox.Show("卡号不存在");
                    }
                }
                else
                {
                    if (table1.Rows[0][7].ToString().Trim() == "已经注销")
                    {
                        MessageBox.Show("卡号已经注销");
                    }
                }            
            }
        }

**D层**

public class RechargeDAL:IDAL.IRechargeIDL
        {
            /// <summary>
            /// 查询学生表的初始注册钱+学生注册状态
            /// </summary>
            /// <param name="student"></param>
            /// <returns></returns>
            public DataTable SelectStudent(Entity.StudentInfo student)
            {
                SQLHelper sqlHelper = new SQLHelper();
                SqlParameter[] sqlParams = { new SqlParameter("@UserID", student.UserID) };
                String sql = "Select * from student_info where userID =@UserID ";
                DataTable table = sqlHelper.ExecuteQuery(sql, sqlParams, CommandType.Text);
                return table;
            }
            public DataTable InsertRecharge(Entity.RechargeInfo money)
            {
                DateTime date = DateTime.Now;
                SQLHelper sqlHelper = new SQLHelper();
                SqlParameter[] sqlParams = { new SqlParameter("@CardNO",money.UserID),
                                             new SqlParameter("@Date",date.ToShortDateString()),
                                             new SqlParameter("@Status",money.Status),
                                             new SqlParameter("@Addmoney",money.Addmoney)};
                String sql = "Insert into recharge_info(userID,addmoney,date,status) Values(@CardNO,@Addmoney,@Date,@Status)";
                DataTable table = sqlHelper.ExecuteNonQuery(sql,sqlParams,CommandType.Text);
                return table;
            }

**IDAL层**

public interface IRechargeIDL
        {
            //查询student表，目的返回balance,state,status
            DataTable SelectStudent(Entity.StudentInfo student);
            
            //增加信息(卡号 status addmoney)到recharge表，
            DataTable InsertRecharge(Entity.RechargeInfo money);
            
            //更新student表的balance
            //DataTable UpdateStudent(Entity.StudentInfo student);
        }

颗粒归仓，继续往后走，，，

[70]: /images/20220504/825cd7e517f44f3abeb655d910878d68.png
[70 1]: /images/20220504/be2a8063c5724ab9b55d246658ebdf2a.png