using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;

 namespace EFBindingDataGridView

 {

     public partial class Form1 : Form

     {

         Model1 model = new Model1();

         List<Setting> list = new List<Setting>();

         public Form1()

         {

             InitializeComponent();

         }

         private void loadButton_Click(object sender, EventArgs e)

         {

             list = model.Settings.ToList() ;

             bindingSource1.DataSource = list;

             dataGridView1.DataSource = bindingSource1;

         }

         private void saveButton_Click(object sender, EventArgs e)

         {

             dataGridView1.EndEdit();

             bindingSource1.EndEdit();

             //保存前把新增的对象加入

             foreach(Setting item in list)

             {

                 if(model.Entry(item).State == System.Data.Entity.EntityState.Detached)

                 {

                     model.Settings.Add(item);

                 }

             }

             model.SaveChanges();

         }

         private void dataGridView1_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)

         {

             //获取删除的对象

             Setting set = (Setting)e.Row.DataBoundItem;

             model.Settings.Remove(set);

         }

     }

 }