机房重构之添加用户

添加用户也是用到了七层,说来也简单,先分为两部分,首先要对添加的数据加一个判断,看数据库里是否有重复的数据,然后在添加数据。我这里是用卡号来判断是否重复的。如下:

IDAL

DataTable Select(Entity.AddStudent user);//判断是否有相同数据

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IDAL
{
    public interface IAddstudent
    {
        DataTable Select(Entity.AddStudent user);//判断是否有相同数据
       int  AddStudent(Entity.AddStudent user);//添加数据
    }
}

DAL

 public class Add: IDAL.IAddstudent
    {

        #region 判断是否有重复数据
        public DataTable Select(Entity.AddStudent user)
        {
            SQLHelper sqlhelper = new SQLHelper();//实例化SQLhelp
                                                  //定义一个bool型变量,用来接收返回数据
                                                  //bool flag;
            string sql = "select * from student_info where [email protected]";//查询卡号是否重复
            SqlParameter[] sqlpar =
            {
                new SqlParameter("@cardno", user.cardno ),
            };

            //DataTable tabel =sqlhelper .ExecuteQuery(sql,sqlpar)
            DataTable tabel = sqlhelper.ExecuteQuery(sql, sqlpar, CommandType.Text);
            return tabel;
        }
        #endregion

Facade

 public class Addstudent
    {
        #region 判断数据是否重复
        public bool select(Entity .AddStudent user)
        {
            BLL.Addstudent userbll = new BLL.Addstudent();
            bool falg;
            falg = userbll.flag(user );

            return falg;
        }
        #endregion

BLL

namespace BLL
{
    public class Addstudent
    {
        #region 判断是否有重复数据
        public bool flag(Entity.AddStudent user)
        {
            Factory.AddStudent fact = new Factory.AddStudent();//实例化工厂
            IDAL.IAddstudent idal = fact.Addstudent();
            DataTable table = idal.Select(user);
            bool flag;
            if (flag= table.Rows.Count == 0)//判断数据库里面是否有重复的数据,如果=0说明没有重复的数据行
            {
                flag = true;

            }
            else
            {
                flag = false;
                
            }

            return flag;
        }

第二步    往数据库里面添加数据

Entity

namespace Entity
{
    public class AddStudent
    {
        public int  studentID { get; set; }
        public string studentName { get; set; }
        public string pwd { get; set; }
        public string QRpwd { get; set; }
        public string grade { get; set; }
        public string department { get; set; }
        public string classs { get; set; }
        public string money { get; set; }
        public string sex { get; set; }
        public string cardno { get; set; }
       
    }

IDAL

int  AddStudent(Entity.AddStudent user);//添加数据

namespace IDAL
{
    public interface IAddstudent
    {
        DataTable Select(Entity.AddStudent user);//判断是否有相同数据
       int  AddStudent(Entity.AddStudent user);//添加数据
    }
}

DAL

 public int AddStudent(Entity.AddStudent user)
        {

            SQLHelper sqlhelper = new SQLHelper();//实例化SQLhelp
                             
            SqlParameter[] sqlpar =
            {
                    new SqlParameter("@txtStudentID",user.studentID),
                    new SqlParameter("@txtStudentName",user.studentName),
                    new SqlParameter("@txtPassword",user.pwd),
                    //new SqlParameter("@txtQRpassword",user.pwd),
                    new SqlParameter("@comGrade",user.grade),
                    new SqlParameter("@comDeparment",user.department),
                    new SqlParameter("@comClass",user.classs),
                    new SqlParameter("@txtMoney",user.money),
                    new SqlParameter("@comSex",user.sex),
                    new SqlParameter ("@txtcardno",user.cardno)
                    
        };//定义需要传递的参数      
            string sql = @"insert into student_info(cardno,studentNo,studentName,sex,cash,class,department,grade,password)values(@txtcardno,@txtStudentID,@txtStudentName,@comSex,@txtMoney,@comClass,@comDeparment,@comGrade,@txtPassword)";
            //string sql = "insert into student_info(cardno, studentNo, studentName, sex, cash, UserID, status, Ischeck, date, time, type,class,department,grade,password)values(@cardno,44,4,44,53,3,3,3,'2021-04-21','19:49:31',3,5,6,4,2)"
            //DataTable table  = sqlhelper.ExecuteQuery(sql, sqlpar, CommandType.Text);

            int table = sqlhelper.ExecuteNonQuery(sql, sqlpar, CommandType.Text);
            
            return table ;

        }
    }

Factory

namespace Factory
{
    public class AddStudent
    {
        string StrDB = System.Configuration.ConfigurationManager.AppSettings["DB"];
        public IAddstudent Addstudent()
        {
            string ClassName = StrDB + "." + "Add";
           
            return (IAddstudent)Assembly.Load(StrDB).CreateInstance(ClassName);
           
        }
    }
}

BLL

public int  addstudent(Entity.AddStudent user)//添加数据
        {
            Factory.AddStudent fact = new Factory.AddStudent();//实例化工厂
            IDAL.IAddstudent idal = fact.Addstudent();

           
            int  flag = idal.AddStudent(user);

            return flag;

        }

Facade

public int  addstudent(Entity.AddStudent user)
        {
            
            BLL.Addstudent userbll = new BLL.Addstudent();
            int  flag = userbll.addstudent(user);

            return flag;
        }

UI

 private void button1_Click(object sender, EventArgs e)
        {
            if (txtStudentID.Text =="")
            {
                MessageBox.Show("学号不能为空!", "提示");
            }
            else if (txtStudentName.Text =="")
            {
                MessageBox.Show("姓名不能为空!", "提示");
            }
            else if (txtPassword.Text =="")
            {
                MessageBox.Show("密码不能为空!", "提示");
            }
            else if (txtQRpassword.Text =="")
            {
                MessageBox.Show("确认密码不能为空!", "提示");
            }
            else if (comGrade.Text =="")
            {
                MessageBox.Show("请选择您所在的年级!", "提示");
            }
            else if (comDeparment.Text =="")
            {
                MessageBox.Show("请选择您所在的系别!", "提示");
            }
            else if (comClass.Text =="")
            {
                MessageBox.Show("请选择您所在的班级!", "提示");
            }
            else if (txtMoney.Text =="")
            {
                MessageBox.Show("请输入您要充值的金额,最小金额不能少于3元!", "提示");
            }
            else if (txtPassword.Text != txtQRpassword.Text )
            {
                MessageBox.Show("密码和确认密码不一致,请您再次确认!", "提示");
            }

            else
            {
                Facade.Addstudent facade = new Facade.Addstudent();
                Entity.AddStudent entity = new Entity.AddStudent();
                
                entity.studentID = Convert.ToInt32(txtStudentID.Text.Trim());
                entity.studentName = txtStudentName.Text.Trim();
                entity.pwd = txtPassword.Text.Trim();
                entity.QRpwd = txtQRpassword.Text.Trim();
                entity.grade = comGrade.Text.Trim();
                entity.classs = comClass.Text.Trim();
                entity.department = comDeparment.Text.Trim();
                entity.sex = comSex.Text.Trim();
                entity.money = txtMoney.Text.Trim();
                entity.cardno = txtcardno.Text.Trim();

                bool falg = facade.select(entity);

                if (falg ==false)//与B层的判断关联
                {
                 
                    MessageBox.Show("已有此卡号,请重新输入!","提示");
                }
                else
                {
                    facade.addstudent(entity);
                    MessageBox.Show("添加成功","提示");
                    
                }
          
            }
           
        }

 

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Origin blog.csdn.net/weixin_45309155/article/details/116275530