protected void Button1_Click(object sender, EventArgs e) { int neworderid = 0; OrderDBO db_handler = new OrderDBO(); Item obj = db_handler.itemDetails(TextBox1.Text); Response.Write("<script>alert('Item Price is" + obj.ItemPrice + "')</script>"); //System.Diagnostics.Debug.Write(obj.ItemPrice); if (obj.Quantity < Convert.ToInt16(TextBox2.Text)) { Response.Write("<script>alert('This quantity is not available for this item. Max available is " + obj.Quantity + "')</script>"); } else { Label7.Text = (Convert.ToDouble(obj.ItemPrice) * Convert.ToInt16(TextBox2.Text)).ToString(); Order ord = new Order(TextBox1.Text, Convert.ToInt16(TextBox2.Text), obj.ItemPrice * Convert.ToInt16(TextBox2.Text), TextBox3.Text, TextBox4.Text, TextBox5.Text); neworderid = db_handler.addOrder(ord); Response.Write("<script>alert('Order placed successfully. Order ID is " + neworderid + "')</script>"); } }