private void button1_Click(object sender, EventArgs e) { int id = Convert.ToInt32(dataGridView1.CurrentRow.Cells["StudentId"].Value); if (comboBox1.Text == "ACTIVE") { string oss = "Update GroupStudent SET Status = '" + 3 + "' where StudentId = '" + id + "'"; dbConnection.getInstance().exectuteQuery(oss); } else if (comboBox1.Text == "INACTIVE") { string oss = "Update GroupStudent SET Status = '" + 4 + "' where StudentId = '" + id + "'"; dbConnection.getInstance().exectuteQuery(oss); } else if (comboBox1.Text == "") { labelerror.Text = "Select Status Please"; labelerror.Visible = true; } this.Hide(); EditStatus ed = new EditStatus(); ed.Show(); }