Question

(I still feel like a complete newbie in MS Visual environments… so please bear with!)

I’m using Microsoft Visual C# 2008 Express Edition.

I have a project and in that project are two different forms. The .cs file for each form starts out:

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Drawing; using System.Text; using System.Windows.Forms;  namespace MyNameSpace {     public partial class MyFormName : Form     { ... 

(…and the second is ‘MyFormName2’ but no differences besides that)

I want to write a function that I know both forms are going to need to access. I right-clicked on my project, selected ‘Add’, selected ‘New Item’ then selected ‘Code File’ and named my file ‘Common.cs’ and it gave me a completely blank file that’s in my project.

How do I set this up…? I thought I should do the following…

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.Common; using System.Drawing; using System.Text; using System.Windows.Forms;  namespace MyNameSpace { } 

…but then when I try to add a function like:

public void mytestfunc() { } within that namespace I get the following error:

‘Expected class, delegate, enum, interface, or struct’

How do I set things up so I can have ‘mytestfunc’ be available to both MyFormName and MyFormName2?

Thanks!

-Adeena

UPDATE: Understand (now) that everything must be in a class, but then I don’t understand how to really use it. Does that mean I have to create an object? This common function happens to just be some math…

so now if I have this:

namespace MyNameSpace {     public class MyCommonClass     {         public void testFunc()         {             MessageBox.Show('Hee hee!');             return;         }     } } 

…how do I call testFunc from my Form? Must I do the following:

MyCommonClass temp = new MyCommonClass; temp.testFunc(); 

or is there another way to call testFunc?

Answer 1

If you do something like:

namespace MyNameSpace {     public class myclass     {         public myMethod()         {             // Code         }     } } 

You will be able to instantiate and access it. If you change it to:

namespace MyNameSpace {     public class myclass     {         public static myMethod()         {             // Code         }     } } 

You will be able to call myClass.myMethod without instantiating a new myClass.