C#--两层架构基于OOP实现对象添加到数据库

准备的工作

俩层架构的框架

1-数据访问层—DAL;

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2-实体类—Models;

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3-UI层—StudentManagePro;

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总体架构展示：

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SQL表：

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UI界面展示

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编写后台方法StudentService.cs

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

namespace DAL
{
    //添加学员对象数据访问类
    public  class StudentService
    {

        //添加学员对象
        public int AddStudent(Students objStudent)
        {
            string sql = "insert into Students (StudentName,Age,Gender,Bitrthday,";
            sql += "CardNo,ClassId,StudentIdNo,PhoneNumber,StudentAddress,StuImage) ";
            sql += " Values('{0}',{1},'{2}','{3}','{4}',{5},{6},'{7}','{8}','{9}')";
            sql = string.Format(sql, objStudent.StudentName, objStudent.Age, objStudent.Gender,
                objStudent.Birthday.ToString("yyyy-MM-dd"), objStudent.CardNo,
                objStudent.ClassId, objStudent.StudentIdNo, objStudent.PhoneNumber,
                objStudent.StudentAddress, objStudent.StuImage);
            try
            {
                return SQLHelper.Update(sql);
            }
            catch (Exception ex)
            {

                throw new Exception("保存数据出现问题" + ex.Message);
            }

        }
    }
}

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封装对象

 //封装学员对象
            Students objStudent = new Students()
            {
                StudentName = this.txtStuName.Text.Trim(),
                Gender = this.rdoMale.Checked ? "男" : "女",
                Birthday = Convert.ToDateTime(this.txtBirthday.Text),
                Age = DateTime.Now.Year - Convert.ToDateTime(this.txtBirthday.Text).Year,
                ClassId = Convert.ToInt32(this.cboClssName.SelectedValue),
                StudentIdNo = Convert.ToDecimal(this.txtStuIdNo.Text.Trim()),
                CardNo = this.txtCardNo.Text.Trim(),
                PhoneNumber = this.txtPhoneNumber.Text.Trim(),
                StudentAddress = this.txtStudAddress.Text.Trim(),
                StuImage = this.pbStu.Image == null?"":new Common.SerializeObjectToString()
                .SerializeObject(this.pbStu.Image)            
            };

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提交对象

创建后台访问对象：

SQL表格内容：