DataGridView（C#使用SqlDataAdapter.Update更新数据库）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Data.SqlClient;

namespace PrjCodeManage
{
public partial class FrmPosiType : Form
{
public FrmPosiType()
{
InitializeComponent();
}

SqlConnection cn = new SqlConnection("Data Source=MICROSOF-406AD7//SQLEXPRESS;Initial Catalog=JYDB;Integrated Security=True");
SqlCommand cm = new SqlCommand();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
SqlCommandBuilder cb = new SqlCommandBuilder();
private void FrmPosiType_Load(object sender, EventArgs e)
{

cm = new SqlCommand("select * from HR_TrainType", cn);
da = new SqlDataAdapter(cm);
da.Fill(ds, "HR_TrainType");
this.dataGridView1.DataSource = ds.Tables["HR_TrainType"];
}
private void tsbSave_Click(object sender, EventArgs e)
{
cm = cn.CreateCommand();
cm.CommandText = "select * from HR_TrainType";
da = new SqlDataAdapter(cm);
cb = new SqlCommandBuilder(da);
da.Update(ds.Tables[0]);
this.dataGridView1.Update();
//MessageBox.Show("保存成功！");
}
}
}

后记：功能确实实现了，可是要将光标从编辑的单元格中移出后，保存才好用，我自己感觉还是十分难用的，大家伙有没有好的解决办法？