private void button2_Click(object sender, EventArgs e) { this.Hide(); WelcomeWindow w = new WelcomeWindow(ID); w.Show(); }
private void loginButton_Click(object sender, EventArgs e) { //Initiating SQL Connection: SqlConnection con = new SqlConnection("data source = DESKTOP-QPUU33H;" + "database = Library;" + "integrated security = true"); SqlDataAdapter sda = new SqlDataAdapter("Select * from UserLogin where UserID ='" + getId.Text.ToString() + "'and Password ='******'", con); DataTable DT = new DataTable(); sda.Fill(DT); if (DT.Rows.Count > 0) { WelcomeWindow firstWindow = new WelcomeWindow(getId.Text.ToString()); firstWindow.Show(); this.Hide(); } else { MessageBox.Show("Invalid user name and password.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } }