一、设计思想





二、主要源代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;

namespace DatebaseCreateTest
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            using (var date = new A07DbEntities())
            {
                //获取数据库
                var d = from t in date.Student select t;
                // 删除原来的记录
                //获取对象
      /*          var removeStudent1 = date.Student.FirstOrDefault<Student>(s=>s.学号==19001003);
                var removeStudent2 = date.Student.FirstOrDefault<Student>(s => s.学号==19001004);
                //执行删除
                date.Student.Remove(removeStudent1);
                date.Student.Remove(removeStudent2);
                //保存
                date.SaveChanges();
                if (removeStudent1 == null && removeStudent2 == null)
                {
                    MessageBox.Show("清空成功！添加新纪录");
                }
                else { MessageBox.Show("找不到要删除的对象！"); }  */
                //添加记录
                if (d.Count() == 0)
                {
                    Student s1 = new Student { 学号 = 19001001, 姓名 = "张三", 性别 = "男", 专业 = "软件工程", 宿舍号 = "1-202" };
                    Student s2 = new Student { 学号 = 19001002, 姓名 = "李四", 性别 = "男", 专业 = "网络工程", 宿舍号 = "1-203" };
                    date.Student.Add(s1);
                    date.Student.Add(s2);
                    date.SaveChanges();
                }
                //再次查询
                    d = from t in date.Student select t;
                //展示内容
                DateGrid1.ItemsSource = d.ToList();
            }
        }

    }
}