public partial class Form3 : Form
{
DataSet ds;
DataTable dt;
SqlDataAdapter adapter;
public string connectionString = @"Data Source=DESKTOP-B1D459P\MSSQLSERVER01;Initial Catalog=AccountingData;Integrated Security=True";
string tabltovar = "SELECT * FROM dbo.tovar";
string cmd_text;
public Form3()
{
InitializeComponent();
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
adapter = new SqlDataAdapter(tabltovar, connection);
ds = new DataSet();
adapter.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
}