CODEWITHSUNDEEP
c#.net
YouneL
YouneL

Reputation: 8369

I can't reference my class library

I have a solution that contains two projects developed in visual studio 2012 express, and both targeting the .net framwork 4.5.

the first "Dao" project purpose is to take data from a database. and take these data to the second project as a dll library

the second project "UI" purpose is to display data coming from dll library

when i added reference to the second project and wrote using statement, I got the following error:

The type or namespace name 'Dao' could not be found (a using directive or an assembly reference missing?)

I tried to change the target of the two projects to .net framework 4.0 and .net framework 3.5 , but I got the same error.

I also add this piece of code to be sure that the target is change but I got true :

using System;

using Dao; // error

namespace Ui
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(Type.GetType("System.Reflection.ReflectionContext", false) != null);
            Console.ReadKey();
        }
    }
}

What do I need to do to fix the problem? Thanks a bunch.

Upvotes: 0

Views: 4724

Answers (2)

Philip Gullick
Philip Gullick

Reputation: 995

First things first:

  1. Add a reference to Dao - in source explorer right click references->Add->projects tab.

  2. Add a using statement at the top of your code something like using Dao;

  3. Ensure Dao is a public class

This way your code will know to reference Dao, it is usually better to create a new instance of Dao: 

Dao example = new Dao();

Then when calling Dao you would call example instead, so example.(name of method)

Upvotes: 3

Bill Gregg
Bill Gregg

Reputation: 7147

You need to add a reference to your Dao assembly from your UI assembly. Right Click on References, Add Reference. In the Projects tab, select your Dao project and hit OK.

Upvotes: 5

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