Bài viết hôm nay sẽ hướng dẫn các bạn kết nối C# với CSDL MySQL
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| Giao dien WinForm |
Source Code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
namespace KetNoiMySQL
{
public partial class Form1 : Form
{
MySqlConnection Conn;
MySqlCommandBuilder cmd;
MySqlDataAdapter adap;
DataTable mytable;
string strconn = "Server = localhost; Database = danhsachsv; UId = root; Pwd = 123456; Pooling=false;Character Set=utf8";
string query_select = "SELECT * FROM sinhvien";
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
try
{
Conn = new MySqlConnection(strconn);
Conn.Open();
adap = new MySqlDataAdapter(query_select, Conn);
cmd = new MySqlCommandBuilder(adap);
mytable = new DataTable();
adap.Fill(mytable);
Conn.Close();
dataGridView1.DataSource = mytable;
}
catch (MySqlException)
{
MessageBox.Show("Lỗi kết nối MySQL", "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void label2_Click(object sender, EventArgs e)
{
}
private void Btn_Add_Click(object sender, EventArgs e)
{
Conn.Open();
string query_insert = "INSERT INTO sinhvien (`HoTen`, `NamSinh`, `DiaChi`) VALUES ('" + TB_HoTen.Text + "','" + TB_NamSinh.Text + "','" + TB_DiaChi.Text + "')";
MySqlCommand command = new MySqlCommand(query_insert, Conn);
command.ExecuteNonQuery();
Conn.Close();
Read_Data();
}
private void Read_Data()
{
Conn.Open();
adap = new MySqlDataAdapter(query_select, Conn);
cmd = new MySqlCommandBuilder(adap);
mytable = new DataTable();
adap.Fill(mytable);
Conn.Close();
dataGridView1.DataSource = mytable;
}
private void Btn_Edit_Click(object sender, EventArgs e)
{
Conn.Open();
string query_edit = "UPDATE sinhvien SET `HoTen`='" + TB_HoTen.Text + "', `NamSinh`='" + TB_NamSinh.Text + "', `DiaChi`='" + TB_DiaChi.Text + "' WHERE Id = '" + int.Parse(TB_Id.Text) + "'";
MySqlCommand command = new MySqlCommand(query_edit, Conn);
command.ExecuteNonQuery();
Conn.Close();
Read_Data();
}
private void Btn_Delete_Click(object sender, EventArgs e)
{
Conn.Open();
string query_delete = "DELETE FROM sinhvien WHERE `Id`='" + int.Parse(TB_Id.Text) + "'";
MySqlCommand command = new MySqlCommand(query_delete, Conn);
command.ExecuteNonQuery();
Conn.Close();
Read_Data();
}
}
}
Link tải file DLL:
Video hướng dẫn:
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