学了两个月的WINFORM，越学越感觉C#功能全面，前几天一直在用DATAGRIDVIEW的基本功能，今天尝试了解了 binddingNavigator & BindingSource和DATAGRIDVIEW进行联动，即点击上一下，下一行图标后，下面的textbox文本框的内容可以自动随着变化。

点击修改按钮可以在进行修改；

0# 前提：

定义两个类变量：dt，ds 

        DataTable dt;
        BindingSource bs = new BindingSource();

要点：

1#、datagridview的datasource设为 BindingSource，并且将列表中的字段设置DataPropertyName 为DataTable指定的列；

        private void BindData()
        {
            dataGridView1.DataSource = bs;       //把数据源绑定在dataGridView1上
            //绑定每列的值显示在DatagridView
            this.dataGridView1.Columns[0].DataPropertyName = dt.Columns["id"].ToString();
            this.dataGridView1.Columns[1].DataPropertyName = dt.Columns["begintime"].ToString();
            this.dataGridView1.Columns[2].DataPropertyName = dt.Columns["endtime"].ToString();
            this.dataGridView1.Columns[3].DataPropertyName = dt.Columns["clientid"].ToString();
            this.dataGridView1.Columns[4].DataPropertyName = dt.Columns["clientname"].ToString();
        }

2、将textbox文本框的DataPropertyName 为DataTable指定的列；

            this.txtName.DataBindings.Add("Text", bs, "ClientName");
            this.txtId.DataBindings.Add("Text", bs, "ClientId");
            this.txtGoods.DataBindings.Add("Text", bs, "Goodsid");
            this.txtAmount.DataBindings.Add("Text", bs, "amount");

3、将bindingNavigator1的BindingSource = bs，

附上全部代码 ，其中数据库的类定义在DBHelper;

 1 using drp.DB;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.ComponentModel;
 5 using System.Data;
 6 using System.Drawing;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 using System.Windows.Forms;
11 
12 namespace drp
13 {
14     public partial class FrmTest : Form
15     {
16         DataTable dt;
17         BindingSource bs = new BindingSource();
18         public FrmTest()
19         {
20             InitializeComponent();
21         }
22 
23         private void FrmTest_Load(object sender, EventArgs e)
24         {
25             
26             string sql = "select * from agreement";
27             dt = DBHelper.ExecuteQuery(sql);
28             bs.DataSource = dt;
29             bindingNavigator1.BindingSource = bs;//把数据源绑定在bindingNavigator1上
30             //把datagridview 的数据源绑定到bs 
31             BindData();
32 
33             this.txtName.DataBindings.Add("Text", bs, "ClientName");
34             this.txtId.DataBindings.Add("Text", bs, "ClientId");
35             this.txtGoods.DataBindings.Add("Text", bs, "Goodsid");
36             this.txtAmount.DataBindings.Add("Text", bs, "amount");
37 
38         }
39 　　　　　//修改按钮
40         private void button1_Click(object sender, EventArgs e)
41         {
42             this.txtName.Enabled = true;
43             this.txtId.Enabled = true;
44             this.txtGoods.Enabled = true;
45             this.txtAmount.Enabled = true;
46             this.btnEdit.Enabled = false;
47             this.btnSave.Enabled = true;
48         }
49 　　　　　//　保存
        private void button2_Click(object sender, EventArgs e)
51         {
52             //接受修改
53             bs.EndEdit();
54             DBHelper.UpdateDataTable(dt,"agreement");
55             //将保存按钮改为 不可用
56             this.btnSave.Enabled = false;
57             this.btnEdit.Enabled = true;
58         }
59 
60         private void button3_Click(object sender, EventArgs e)
61         {
62 
63         }
64 
65         private void toolStripSave_Click(object sender, EventArgs e)
66         {
67             bs.EndEdit();
68             BindData();
69             DBHelper.UpdateDataTable(dt, "agreement");
70         }
71 
72         private void BindData()
73         {
74             dataGridView1.DataSource = bs;       //把数据源绑定在dataGridView1上
75             //绑定每列的值显示在DatagridView
76             this.dataGridView1.Columns[0].DataPropertyName = dt.Columns["id"].ToString();
77             this.dataGridView1.Columns[1].DataPropertyName = dt.Columns["begintime"].ToString();
78             this.dataGridView1.Columns[2].DataPropertyName = dt.Columns["endtime"].ToString();
79             this.dataGridView1.Columns[3].DataPropertyName = dt.Columns["clientid"].ToString();
80             this.dataGridView1.Columns[4].DataPropertyName = dt.Columns["clientname"].ToString();
81         }
82     }
83 }