datagrid显示mysql_WPF DataGrid显示MySQL查询信息，且可删除、修改、插入（原发布 csdn 2018-10-13 20:07:28）...

1、入行好几年了，工作中使用数据库几率很小(传统行业)。借着十一假期回家机会，学习下数据库。

2、初次了解数据库相关知识，如果本文有误，还望告知。

3、本文主要目的，记录下wpf界面显示数据库信息，且可进行删除、修改、插入命令。并反馈数据到MySQL。做个记录，以便以后工作中使用到时没个头绪。

4、MySQL的基本讲解不再介绍，安装过程什么的，我也是按照网上教程一步一步进行的，假定MySQL已安装成功，且新建有数据库，见下图:

废话不多说，直接上代码

界面代码xaml

后端代码cs

public partial class MainWindow : Window

{

//SQLBulkCopy

Random rd = new Random();

string sqlstr = "Data Source=127.0.0.1;User ID=root;Password=root;DataBase=test;Charset=utf8;";

MySql.Data.MySqlClient.MySqlConnection con;

MySql.Data.MySqlClient.MySqlDataAdapter adapter;

System.Data.DataSet ds;

System.Data.DataTable dt;

public MainWindow()

{

InitializeComponent();

UpdateMySQLData();

}

private void DataGrid_LoadingRow(object sender, System.Windows.Controls.DataGridRowEventArgs e)

{

e.Row.Header = e.Row.GetIndex() + 1;

}

private void UpdateMySQLData()

{

if (con == null)

{

con = new MySql.Data.MySqlClient.MySqlConnection(sqlstr);

con.Open();

}

if (adapter == null)

{

adapter = new MySql.Data.MySqlClient.MySqlDataAdapter("select * from user", con);

}

if (ds == null)

{

ds = new System.Data.DataSet();

}

ds.Clear();

adapter.Fill(ds, "user");

if (dt == null)

{

dt = ds.Tables["user"];

}

DataGrid1.ItemsSource = dt.DefaultView;

}

private void DeleteButton_Click(object sender, RoutedEventArgs e)

{

int index = DataGrid1.SelectedIndex;

if (index == -1) return;

#if MySQLCommand

string DeleteSqlCommand = string.Format("delete from user where id = '{0}'", dt.Rows[index]["id"]);

MySql.Data.MySqlClient.MySqlCommand cmd = new MySql.Data.MySqlClient.MySqlCommand(DeleteSqlCommand, con);

cmd.ExecuteNonQuery();

UpdateMySQLData();

#else

dt.Rows[index].Delete();

//dt.Rows.RemoveAt(index);==dt.Rows[index].Delete() + dt.AcceptChanges()

MySql.Data.MySqlClient.MySqlCommandBuilder builder = new MySql.Data.MySqlClient.MySqlCommandBuilder(adapter);

adapter.Update(dt);

dt.AcceptChanges();

#endif

}

private void UpdateButton_Click(object sender, RoutedEventArgs e)

{

#if MySQLCommand

int index = DataGrid1.SelectedIndex;

string UpdateSqlCommand = string.Format("update user set id = '{0}', name = '{1}', phone = '{2}', email = '{3}' where id = '{0}'",

dt.Rows[index]["id"], dt.Rows[index]["name"], dt.Rows[index]["phone"], dt.Rows[index]["email"]);

MySql.Data.MySqlClient.MySqlCommand cmd = new MySql.Data.MySqlClient.MySqlCommand(UpdateSqlCommand, con);

cmd.ExecuteNonQuery();

UpdateMySQLData();

#else

MySql.Data.MySqlClient.MySqlCommandBuilder builder = new MySql.Data.MySqlClient.MySqlCommandBuilder(adapter);

adapter.Update(dt);

dt.AcceptChanges();

#endif

}

private void InsertButton_Click(object sender, RoutedEventArgs e)

{

#if MySQLCommand

string InsertSqlCommand = string.Format("insert into user(id, name, phone,email) values('{0}','{1}','{2}','{3}')", rd.Next(100), "ZhangSan", 12332112345, "zhangsan@qq.com");

MySql.Data.MySqlClient.MySqlCommand cmd = new MySql.Data.MySqlClient.MySqlCommand(InsertSqlCommand, con);

cmd.ExecuteNonQuery();

string InsertSqlCommand2 = string.Format("insert into user(id, name, phone,email) values('{0}','{1}','{2}','{3}')", rd.Next(100), "LiSi", 12332112345, "lisi@yahoo.com");

MySql.Data.MySqlClient.MySqlCommand cmd2 = new MySql.Data.MySqlClient.MySqlCommand(InsertSqlCommand2, con);

cmd2.ExecuteNonQuery();

UpdateMySQLData();

#else

System.Data.DataRow dr = dt.NewRow();

dr[0] = rd.Next(100);

dr[1] = "ZhangSan";

dr[2] = "12332112345";

dr[3] = "zhangsan@qq.com";

dt.Rows.Add(dr);

System.Data.DataRow dr2 = dt.NewRow();

dr2[0] = rd.Next(100);