private void button1_Click(object sender, EventArgs e)
{
if (dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected) > 0)
{
try
{
Querys query = new Querys();
int i = dataGridView1.SelectedRows[0].Index;
String a = dataGridView1.Rows[i].Cells[0].Value.ToString();
query.EliminarVenta(a);
Actualizar();
}
catch (Exception a) {
}
}
}