CODEWITHSUNDEEP
c#using
steventnorris
steventnorris

Reputation: 5896

C# Using Multiple Files in ASP.NET

I have a file, Tools.cs, with a class in it, Tools. I use another file, Default.cs, as the codebehind to my Default.aspx. I've tried all of the below to use the tools file in the default file, but nothing works. How can I do this?

using Tools;
using Global.Tools; //Added namespace Global to my tools class
using Global;

EDIT: To be more throrough, here's some code.

//Tools.cs
namespace Global{
    public sealed class Tools{
     //Tools stuff
    }
}

//Default.cs

using System;
using System.Web.UI;
using Global; 

namespace Home{
    public class Default :Page{
        //Page stuff
    }
}

and I get the error:

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0246: The type or namespace name 'Global' could not be found (are you missing a using directive or an assembly reference?)

Upvotes: 0

Views: 1314

Answers (6)

Alex Mendez
Alex Mendez

Reputation: 5150

Make sure your Tools class is set to compile in the Properties --> Build Action.

Also, to use it you may have to do something like this:

_Default.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ThisWorks.Fine;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Tools tools = new Tools();
    }
}

And

Tools.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace ThisWorks.Fine
{
    /// <summary>
    /// Summary description for Tools
    /// </summary>
    public class Tools
    {
        public Tools() { }
        //Tools stuff
    }
}

Upvotes: 1

Juan Ayala
Juan Ayala

Reputation: 3528

If you are trying to reference it within the Default.aspx, edit your web.config

<?xml version="1.0"?>
<configuration>
    <system.web>
        <pages>
            <compilation debug="true" targetFramework="4.0" />
            <namespaces>
                <add namespace="WebApplication1.SubNamespace"/>
            </namespaces>
        </pages>
    </system.web>
</configuration>

and your class may look like this:

namespace WebApplication1.SubNamespace
{
    public static class Class1
    {
        public static string value { get { return "hello world!!"; } }
    }
}

this will make it referable within aspx markup like this:

<form id="form1" runat="server">
<div>
    <%= Class1.value %>
</div>
</form>

Upvotes: 1

kaj
kaj

Reputation: 5251

OK, since you're developing in Notepad++ are you compiling using csc?

The syntax for the compilation should be something like: 

csc /t:library /out:MyCodeLibrary.dll Tools.cs Default.cs

To see the options for csc look at: http://msdn.microsoft.com/en-us/library/ms379563%28v=VS.80%29.aspx

Note that you can download Visual Studio Express for free and it'll make you much more productive and reduce the confusion in cases such as this.

Upvotes: 0

user596075
user596075

Reputation:

The using directive isn't for files, it's for namespaces.

using YourToolsNamespace;

Where YourToolsNamespace is what contains your Tools class.

Edit: you will also need to have this in your project references. For instance, you can reference your code library from the GAC, another project, or a specific location. Right-click on references and find your assembly there.

Upvotes: 3

mo.
mo.

Reputation: 4255

C# uses namespaces to separate classes. If you put both classes inside the same namespace, they'll be accessable to each other. Otherwise, use a using declaration as in your answer, but specify the namespace, not the filename.

//Tools.cs
namespace MyApp.CoreLogic
{
  class Tools
  {
    ...
  }
}

Then...

//Default.cs
namespace MyApp.FrontEnd
{
  using MyApp.CoreLogic

  class Default : Page
  {
    ...
  }
}

Upvotes: 0

Brad Falk
Brad Falk

Reputation: 196

Make sure your Tools class is public.

Upvotes: 0

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