int a = 1;
            for (int n = 0; n < lv1.Items.Count - 1; n++)
            {
                switch (a)
                {
                    case 1:
                        dataGridView1.Rows.Add();
                        dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[0].Value = lv1.Items[n].ToString();
                        break;
                    case 2:
                        dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[1].Value = lv1.Items[n].ToString();
                        break;
                    case 3:
                        dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[2].Value = lv1.Items[n].ToString();
                        break;
                    case 4:
                        dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells[3].Value = lv1.Items[n].ToString();
                        break;
                }
                a = a + 1;
                if (a > 4)
                {
                    a = 1;
                }

            }