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) { } } }