private void button1_Click_1(object sender, EventArgs e) { if (admin.Checked == true) { if (txtUsername.Text == "" || txtPassword.Text == "") { MessageBox.Show("Please provide UserName and Password"); return; } try { //Create SqlConnection SqlConnection con = new SqlConnection(connetionString); SqlCommand cmd = new SqlCommand("Select * from Admin where admin_name=@username and admin_pass=@password", con); cmd.Parameters.AddWithValue("@username", txtUsername.Text); cmd.Parameters.AddWithValue("@password", txtPassword.Text); con.Open(); SqlDataAdapter adapt = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); adapt.Fill(ds); con.Close(); int count = ds.Tables[0].Rows.Count; //If count is equal to 1, than show frmMain form if (count == 1) { this.Hide(); Adminpage fm = new Adminpage(); fm.Show(); } else { MessageBox.Show("Login Failed!"); } } catch (Exception ex) { MessageBox.Show(ex.Message); } } if (user.Checked == true) { //existing login validation loginvalidation(); if (txtRollno.Text == rollno) { MessageBox.Show("You have already Attempted Exam."); } else { string clg = clglist.SelectedItem.ToString(); string cat = catlist.SelectedItem.ToString(); SqlConnection con; con = new SqlConnection(connetionString); SqlCommand cmd = new SqlCommand("insert into result (roll_no,username,clg_name,category,score,mob) values ('" + txtRollno.Text + "','" + txtUsername.Text + "','" + clg + "','" + cat + "','" + 0 + "','" + txtmob.Text + "')", con); cmd.CommandType = CommandType.Text; try { string mob = txtmob.Text; if (txtUsername.Text == "" || txtRollno.Text == "") { MessageBox.Show("Please insert fields!!!"); } else if (mob.Length != 10) { MessageBox.Show("Please insert Proper Mobile 10 No.only!!!"); } else { con.Open(); cmd.ExecuteNonQuery(); this.Hide(); Instruction fm = new Instruction(); fm.passingvalue = txtUsername.Text; fm.passingvalue1 = txtRollno.Text; fm.Show(); con.Close(); refress(); } } catch (Exception ex) { MessageBox.Show(ex.Message); } } } }