[khodor1985]

PHP كود :

{
            Form1 frm1 = new Form1();
            Form2 frm2 = new Form2();
            
            OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0,Data Source=D:\LoginDB.accdb");
            con.Open();
            OleDbCommand cmd = new OleDbCommand(@"Select DUser,DPassword From tblPerson Where DUser like '" + textBox1.Text + "' and DPassword Like '" + textBox2.Text + "'", con);
            OleDbDataReader dr = cmd.ExecuteReader();

            if (dr.Read())
            {
                frm2.Show();
                frm1.Hide();
            }

            dr.Close();
            con.Close();
                
        } 


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من خلال Linq to sql :

PHP كود :

{
            Form1 frm1 = new Form1();
            Form2 frm2 = new Form2();
            var GetData = (from x in dbs.tblUsers
                          where x.DUser == textBox1.Text && x.DPassword == textBox2.Text
                          select new { x.DUser, x.DPassword }).SingleOrDefault();

            if (GetData == null)
            {
                MessageBox.Show("The User or password is incorrect");
                return;
                
            }

            if (GetData != null)
            {
                frm2.Show();
                frm1.Hide();
            }
                         
        }
    }