private void button_add_Click(object sender, EventArgs e) { ArrayList userInfo = new ArrayList(); String pass = textBox_password.Text; String conPass = textBox_confirm.Text; if (String.IsNullOrEmpty(textBox_name.Text) || String.IsNullOrEmpty(textBox_uname.Text) || String.IsNullOrEmpty(textBox_password.Text) || String.IsNullOrEmpty(textBox_confirm.Text) || String.IsNullOrEmpty(textBox_position.Text)) { MessageBox.Show("Fill up all data"); } else { DatabaseHelperClass ob1 = new DatabaseHelperClass(); String username = textBox_uname.Text; if (ob1.checkUserExist(username)) { if (String.Compare(pass, conPass) == 0) { userInfo.Add(textBox_uname.Text); userInfo.Add(pass); userInfo.Add(textBox_position.Text); userInfo.Add(textBox_name.Text); DatabaseHelperClass ob = new DatabaseHelperClass(userInfo); if (ob.addNewUser()) { MessageBox.Show("User Added"); } else { MessageBox.Show("Error Adding User"); } } else { MessageBox.Show("Password Don't Matched"); } } else { MessageBox.Show("User already exist"); } } }