Stored procedure in C# datagridview instead of listbox

Question

I have a problem with stored procedures.

This code works (with a ListBox)

private void button4_Click(object sender, EventArgs e)
{
   string connectionString = ConfigurationManager.ConnectionStrings["connString"].ConnectionString;
   SqlConnection connection = new SqlConnection(connectionString);

   string sqlCmd = "Drie duurste producten";

   SqlCommand cmd = new SqlCommand(sqlCmd, connection);

   cmd.CommandType = CommandType.StoredProcedure;
   cmd.CommandText = sqlCmd;

   connection.Open();

   using (SqlDataReader reader = cmd.ExecuteReader())
   {
      while (reader.Read())
      {
          listBox1.Items.Add(reader.GetValue(0).ToString()); 
      }
   }   

   connection.Close();
}

But how can I add this data to a DataGridView instead of a ListBox?

Thank you!

Answer 1

Change to

   ......
   using (SqlDataAdapter adapter = new SqlDataAdapter()) 
   { 
        DataTable dt = new DataTable();
        adapter.SelectCommand = cmd;            { 
        adapter.Fill(dt);
        dataGridView1.DataSource = dt;
   }    
   ......

usually a DataGridView is filled binding a complete datasource to its DataSource property and letting the control to figure out how to configure its columns and the formatting of the values displayed