Wrox Programmer Forums
Go Back   Wrox Programmer Forums > ASP.NET and ASP > ASP.NET 2.0 > ASP.NET 2.0 Basics
| Search | Today's Posts | Mark Forums Read
ASP.NET 2.0 Basics If you are new to ASP or ASP.NET programming with version 2.0, this is the forum to begin asking questions. Please also see the Visual Web Developer 2005 forum.
Welcome to the p2p.wrox.com Forums.

You are currently viewing the ASP.NET 2.0 Basics section of the Wrox Programmer to Programmer discussions. This is a community of software programmers and website developers including Wrox book authors and readers. New member registration was closed in 2019. New posts were shut off and the site was archived into this static format as of October 1, 2020. If you require technical support for a Wrox book please contact http://hub.wiley.com
  #1 (permalink)  
Old January 12th, 2008, 11:40 AM
Registered User
Points: 33, Level: 1
Points: 33, Level: 1 Points: 33, Level: 1 Points: 33, Level: 1
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jan 2008
Location: , , .
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Default missing a using directive or an assembly reference

Hi, I stopped at page 341(Chapter 9: code).
"Inheritance.aspx" is added under the root."Vehicles.cs" is added under the folder "App_Code".

But I got an error
Code:
CS0246: The type or namespace name 'Car' could not be found (are you missing a using directive or an assembly reference?)
Code:
Line 18:     protected void Button1_Click(object sender, EventArgs e)
Line 19:     {
Line 20:         Car myTransport = new Car();
Line 21:         Label4.Text = myTransport.Wheels.ToString();
Line 22:         Label5.Text = myTransport.TopSpeed.ToString();
I guess the code files might be put the appropriate place.
Thanks for your help.
  #2 (permalink)  
Old January 12th, 2008, 01:28 PM
Imar's Avatar
Wrox Author
Points: 70,322, Level: 100
Points: 70,322, Level: 100 Points: 70,322, Level: 100 Points: 70,322, Level: 100
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jun 2003
Location: Utrecht, Netherlands.
Posts: 17,089
Thanks: 80
Thanked 1,576 Times in 1,552 Posts
Default

Hi there,

This looks like it's supposed to work.

But does Vehicles.cs contain the Car class? What does it look like?

Imar
---------------------------------------
Imar Spaanjaars
http://Imar.Spaanjaars.Com
Everyone is unique, except for me.
Author of ASP.NET 2.0 Instant Results and Beginning Dreamweaver MX / MX 2004
Want to be my colleague? Then check out this post.
  #3 (permalink)  
Old January 12th, 2008, 05:40 PM
Registered User
Points: 33, Level: 1
Points: 33, Level: 1 Points: 33, Level: 1 Points: 33, Level: 1
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jan 2008
Location: , , .
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Default



Code:
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for Vehicles
/// </summary>
public class Vehicles
{
    protected int _wheels;
    protected int _topSpeed;
    protected string _warningSound;

    public int Wheels
    {
        get { return _wheels; }
        set { _wheels = value;}
    }

    public int TopSpeed
    {
        get { return _topSpeed; }
        set { _topSpeed = value; }
    }

    public virtual string Warning()
    {
        return _warningSound;
    }

    public Vehicles()
    {
        //
        // TODO: Add constructor logic here
        //
    }

    public class Car : Vehicles
    {
        public Car()
        {
            _wheels = 4;
            _topSpeed = 150;
            _warningSound = "Honk";
        }
    }

    public class Bike : Vehicles
    {
        public Bike()
        {
            _wheels = 2;
            _topSpeed = 30;
            _warningSound = "Ring Ring";
        }
    }

    public class Skateboard : Vehicles
    {
        public Skateboard()
        {
            _wheels = 4;
            _topSpeed = 15;

        }
        public override string Warning()
        {
            return "No warning - you'll have to shout yourself";
        }
    }
}
  #4 (permalink)  
Old January 13th, 2008, 03:50 AM
Authorized User
 
Join Date: Sep 2007
Location: , , Finland.
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Don't declare Car class (or Bike and Skateboard classes) inside Vehicle class. What you should do is:

Code:
class Vehicle { ... }
class Car : Vehicle { ... }
class Bike : Vehicle { ... }
class Skateboard : Vehicle { ... }
You shouldn't declare nested classe unless there's a really good reason for it. And only good reason which comes to mind is a case where no other class uses nested class but the nesting class (in which case the nested class should be declared as private) and singletons.



Similar Threads
Thread Thread Starter Forum Replies Last Post
Assembly Reference Problem jazzcatone ASP.NET 2.0 Basics 4 June 13th, 2007 11:38 PM
missing directive with simple datagrid pbarbalias ASP.NET 1.0 and 1.1 Basics 1 October 17th, 2006 07:48 PM
Bogus missing reference rahzan Access VBA 8 April 11th, 2005 08:35 AM
What missing reference rjp Access 4 December 7th, 2004 01:16 PM
IsBroken vs Missing Reference tlwaltz BOOK: Access 2003 VBA Programmer's Reference 1 August 5th, 2004 10:43 PM





Powered by vBulletin®
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright (c) 2020 John Wiley & Sons, Inc.