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、入行好幾年了，工作中使用數據庫幾率很小(傳統行業)。借著十一假期回家機會，學習下數據庫。
2、初次了解數據庫相關知識，如果本文有誤，還望告知。
3、本文主要目的，記錄下wpf界面顯示數據庫信息，且可進行刪除、修改、插入命令。并反饋數據到MySQL。做個記錄，以便以后工作中使用到時沒個頭緒。
4、MySQL的基本講解不再介紹，安裝過程什么的，我也是按照網上教程一步一步進行的，假定MySQL已安裝成功，且新建有數據庫，見下圖:
廢話不多說，直接上代碼
界面代碼xaml
后端代碼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);
dr2[1] = "LiSi";
dr2[2] = "12332154321";
dr2[3] = "lisi@yahoo.com";
dt.Rows.Add(dr2);
MySql.Data.MySqlClient.MySqlCommandBuilder builder = new MySql.Data.MySqlClient.MySqlCommandBuilder(adapter);
adapter.Update(ds, "user");
dt.AcceptChanges();
#endif
}
}
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