using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Data.SqlClient; namespace Supermarket { public partial class Login : Form { public static string Sellername = ""; public Login() { InitializeComponent(); } SqlConnection Con = new SqlConnection(@"[Your Data Location]"); //Login private void LoginButton_Click(object sender, EventArgs e) { if(UsernameTextbox.Text=="" || PasswordTextbox.Text=="") { MessageBox.Show("Please enter the Username and Password", "", MessageBoxButtons.OK, MessageBoxIcon.Warning); } else { if(ComboboxRole.SelectedItem.ToString()=="Admin") { //Login Username: Admin Password: Admin if(UsernameTextbox.Text=="Admin" && PasswordTextbox.Text=="Admin") { this.Hide(); ProductForm log = new ProductForm(); log.Show(); } else { MessageBox.Show("Username or Password is wrong"); } } else if(ComboboxRole.SelectedItem.ToString()=="Seller") { Con.Open(); SqlDataAdapter sda = new SqlDataAdapter("Select count(8) from SellerData where SellerName='"+UsernameTextbox.Text+ "' and SellerPass='" + PasswordTextbox.Text+"'", Con); DataTable dt = new DataTable(); sda.Fill(dt); if(dt.Rows[0][0].ToString() == "1") { Sellername = UsernameTextbox.Text; SellingForm log = new SellingForm(); log.Show(); this.Hide(); Con.Close(); } else { MessageBox.Show("Username or Password Wrong"); } } else { MessageBox.Show("Please Choose Role First", "", MessageBoxButtons.OK, MessageBoxIcon.Warning); } } } } }