public Form3(Form13 f13)
{
InitializeComponent();
string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;
myConnection = new OleDbConnection(connectionString);
myConnection.Open();
f13.Close();
}
private void button4_Click(object sender, EventArgs e)
{
int index_str = dataGridView1.CurrentRow.Index;
myConnection.Close();
peredachaID = Convert.ToInt32(dataGridView1[0, index_str].Value);
Form13 newForm = new Form13(this, peredachaID);
newForm.Show();
}