datagridview实现更改的问题
具体代码如下
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;
using System.Data.SqlClient;
using System.Windows.Forms;

namespace student
{
public partial class adslstucs : Form
{
SqlDataAdapter sqlda;
DataSet sqlds;
public adslstucs()
{
InitializeComponent();
}

private void adslstucs_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“studentsysDataSet.student”中。您可以根据需要移动或删除它。
this.studentTableAdapter.Fill(this.studentsysDataSet.student);
SqlConnection conn = new SqlConnection("server=sam-pc;database=studentsys;uid=sa;pwd=sa");
conn.Open();
SqlDataAdapter sqlda;
DataSet sqlds;
sqlda = new SqlDataAdapter("select * from student", conn);
sqlds = new DataSet();
sqlda.Fill(sqlds, "student");
dataGridView1.DataSource = sqlds.Tables["student"];
SqlCommandBuilder sqlCmdBuilder = new SqlCommandBuilder(sqlda);

}

private void button1_Click(object sender, EventArgs e)
{
addstu Main = new addstu();
Main.Show();
}

private void button2_Click(object sender, EventArgs e)
{
destu Main = new destu();
Main.Show();
}

private void button3_Click(object sender, EventArgs e)
{

if (sqlds.HasChanges())
{

try {
sqlda.Update(sqlds.Tables["student"]);
sqlds.Tables["student"].AcceptChanges();
MessageBox.Show("更新成功", "操作结果", MessageBoxButtons.OK, MessageBoxIcon.Information);


}
catch(Exception ex){
MessageBox.Show(ex.Message,"更新失败",MessageBoxButtons.OK,MessageBoxIcon.Error);}

}
}
}
}
我看了论坛上的代码打出来不知道为啥没有反应只能用作刷新，
谢谢各位了
[解决办法]
SqlCommandBuilder sqlCmdBuilder = new SqlCommandBuilder(sqlda);
这条语句移到
sqlda.Update(sqlds.Tables["student"]);
之前