编辑DataGridview并使用c＃将其保存在数据库表中

我使用MYSQL Server作为我的项目后端。我有一个DataGridView，它从数据库中填充数据。 当我在DataGridView单元格中进行更改并单击saveButton时，数据需要在DataGridView和数据库表中进行更改。

在这里我的编码：

using MySql.Data.MySqlClient; using System; using System.Data; using System.IO; using System.Windows.Forms; namespace datagridview { public partial class Form1 : Form { DataTable datatab; MySqlDataAdapter mydtadp; MySqlCommandBuilder cmbl; String MyConnection = "SERVER=*****;" + "DATABASE=****;" + "UID=root;" + "PASSWORD=pws"; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { MySqlConnection MyConn = new MySqlConnection(MyConnection); MyConn.Open(); MySqlCommand comand = new MySqlCommand("select * from aster_scripts;", MyConn); datatab = new DataTable(); mydtadp = new MySqlDataAdapter(comand); mydtadp.Fill(datatab); dataGridView1.DataSource = datatab; MyConn.Close(); } private void BtnSave_Click(object sender, EventArgs e) { DataSet ds = new DataSet(); cmbl = new MySqlCommandBuilder(mydtadp); mydtadp.Update(datatab); MessageBox.Show("SAVED"); } } } 

我有这样的错误（附加信息：对于不返回任何键列信息的SelectCommand，不支持UpdateCommand的动态SQL生成。）行mydtadp.Update（datatab）; 如何才能做到这一点？

Answer 1

请注意模块级变量。 并参考此MSDN片段如果需要。

模式

 create table aster_scripts ( id int auto_increment primary key, i int not null, sThing varchar(30) not null ); insert aster_scripts (i,sThing) values (8,'frog'),(11,'cat'); 

C＃

 using System; using System.Data; using System.Windows.Forms; using MySql.Data.MySqlClient; using System.IO; namespace WindowsFormsApplication1 { public partial class Form2 : Form { private MySqlDataAdapter mydtadp = new MySqlDataAdapter(); private BindingSource bindingSource1 = new BindingSource(); MySqlCommandBuilder cmbl; String MyConnection = "SERVER=hostname;" + "DATABASE=dbname;" + "UID=dbuser;" + "PASSWORD=fffff"; public Form2() { InitializeComponent(); } private void Form2_Load(object sender, EventArgs e) { MySqlConnection MyConn = new MySqlConnection(MyConnection); MyConn.Open(); mydtadp.SelectCommand=new MySqlCommand("select * from aster_scripts", MyConn); cmbl = new MySqlCommandBuilder(mydtadp); DataTable table = new DataTable(); mydtadp.Fill(table); bindingSource1.DataSource = table; dataGridView1.DataSource = bindingSource1; } private void BtnSave_Click(object sender, EventArgs e) { mydtadp.Update((DataTable)bindingSource1.DataSource); MessageBox.Show("SAVED"); } } } 

Chg数据点击保存屏幕截图

数据库条目

 mysql> select * from aster_scripts; +----+----------+--------+ | id | i | sThing | +----+----------+--------+ | 1 | 8 | frog | | 2 | 11333322 | cat | +----+----------+--------+ 

Answer 2

您可能需要更新您的SQL查询：

 select * from aster_scripts); 

成为

 select * from aster_scripts 

您在查询中包含了一个右括号’）’。