对于数据库的操作，必须有SQL SERVER软件，首先我们新建一个WPF工程。

第一步：新建一个数据库

第二步：新建一个表，并且设置ID为主键

第三步：在WPF程序中新建添加实体数据模型

第三步：对数据库进行操作

界面代码

<Window x:Class="EF数据库.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:EF数据库"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid x:Name="Btn">
        <Label Content="id:" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="tbxid" HorizontalAlignment="Left" Height="23" Margin="39,10,0,0" TextWrapping="Wrap" Text="1" VerticalAlignment="Top" Width="120"/>
        <Label Content="name:" HorizontalAlignment="Left" Margin="175,7,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="tbxname" HorizontalAlignment="Left" Height="23" Margin="220,7,0,0" TextWrapping="Wrap" Text="1" VerticalAlignment="Top" Width="120"/>
        <Label Content="number:" HorizontalAlignment="Left" Margin="363,8,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="tbxnumber" HorizontalAlignment="Left" Height="23" Margin="430,9,0,0" TextWrapping="Wrap" Text="1" VerticalAlignment="Top" Width="120"/>
        <Label Content="time:" HorizontalAlignment="Left" Margin="580,6,0,0" VerticalAlignment="Top"/>
        <TextBox x:Name="tbxtime" HorizontalAlignment="Left" Height="23" Margin="630,7,0,0" TextWrapping="Wrap" Text="1" VerticalAlignment="Top" Width="120"/>
        <Button x:Name="BtnAdd" Content="增加" HorizontalAlignment="Left" Margin="84,60,0,0" VerticalAlignment="Top" Width="75" Click="BtnAdd_Click"/>
        <Button x:Name="BtnDel" Content="删除" HorizontalAlignment="Left" Margin="265,60,0,0" VerticalAlignment="Top" Width="75" Click="BtnDel_Click"/>
        <Button x:Name="BtnMod" Content="修改" HorizontalAlignment="Left" Margin="430,60,0,0" VerticalAlignment="Top" Width="75" Click="BtnMod_Click"/>
        <Button x:Name="BtnLook" Content="查看" HorizontalAlignment="Left" Margin="630,60,0,0" VerticalAlignment="Top" Width="75" Click="BtnLook_Click"/>
        <DataGrid x:Name="datagrid" HorizontalAlignment="Left" Height="229" Margin="10,107,0,0" VerticalAlignment="Top" Width="740"/>

    </Grid>
</Window>

后台代码

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 EF数据库
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            tbxtime.Text = DateTime.Now.ToString();

        }
        mydataEntities mydata = new mydataEntities();
        private void BtnLook_Click(object sender, RoutedEventArgs e)
        {
            showdata();
        }

        private void showdata()
        {
            datagrid.ItemsSource = mydata.mytable.ToList();
            //Linq语句
            //var u = from x in mydata.mytable
            //        select x;
            //datagrid.ItemsSource = u.ToList();
        }

        //添加
        private void BtnAdd_Click(object sender, RoutedEventArgs e)
        {
            mytable tb = new mytable(tbxid.Text, tbxname.Text, tbxnumber.Text,tbxtime.Text);

            mydata.mytable.Add(tb);
            mydata.SaveChanges();
            //添加后展示
            showdata();
            MessageBox.Show("添加成功");
        }

        private void BtnDel_Click(object sender, RoutedEventArgs e)
        {
            mytable tb = mydata.mytable.Where(x => x.name == tbxname.Text).FirstOrDefault<mytable>();
            mydata.mytable.Remove(tb);
            mydata.SaveChanges();

            showdata();
            MessageBox.Show("删除成功");
        }

        private void BtnMod_Click(object sender, RoutedEventArgs e)
        {
            //查找到要更改的数据
            mytable tb = mydata.mytable.Where(x => x.name == tbxname.Text).FirstOrDefault<mytable>();
            tb.name = tbxname.Text;
            tb.number = tbxnumber.Text;
            showdata();
            MessageBox.Show("修改成功");
        }