SqlConnection baglanti = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=" + Server.MapPath("\\App_Data\\veritabani.mdf") + ";Integrated Security=True;User Instance=True");
            baglanti.Open();
            SqlCommand sorgu = new SqlCommand("INSERT INTO staj(tarih,gun,baslik,mesaj) VALUES ('" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "','" + TextBox4.Text + "')", baglanti);
            int olay = sorgu.ExecuteNonQuery();
            if (olay > 0)
                Literal1.Text = "Successfully Sent.";
            else
                Literal1.Text = "Unuccessfully Sent.";