How could I use the value of a variable from another class in the same namespace?

Question

2.00/5 (2 votes)

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QueryAnalysis.cs:

C#

namespace DiseaseQuery
{
    public partial class QueryAnalysis : Form
    {
       public static int i = 0;

       public QueryAnalysis()
       {
         InitializeComponent();
       }

    }
}

MySimpleQuery.cs:

C#

namespace DiseaseQuery
{
    public partial class MySimpleQuery : Form
    {
        public MySimpleQuery()
        {
            InitializeComponent();

            int j;
        }
   }
}

How could I pass the value of "i" to "j"?

Posted 3-Mar-11 1:50am

Scarlettlee

Updated 3-Mar-11 15:43pm

v2

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3 solutions

Solution 3

You won't learn much if you keep asking questions like that.
You need do do homework first, and read enough in the language and programming, do enough simple exercises. Then you will be able to ask questions which will be much more useful for you.

Please see my learning suggestions: I have a problem with my program. Please help![^].

This is the first to read: Teach Yourself Programming in Ten Years: http://norvig.com/21-days.html[^].

—SA

Posted 3-Mar-11 5:37am

Sergey Alexandrovich Kryukov

Comments

Scarlettlee 3-Mar-11 21:53pm

Thank you very much for your suggestion! I will think about it.

Sergey Alexandrovich Kryukov 3-Mar-11 22:16pm

Thank you for understanding.
--SA

Solution 2

You declared you variable "i" as static, so you can access it without an instance of QueryAnalysis.
Just use the syntax [ClassName][static,public property/variable name] like John Simmons showed you.
If you don't want to access a static member, you need an instance of QueryAnalysis...

Posted 3-Mar-11 2:52am

johannesnestler

Updated 3-Mar-11 2:53am

v3

Comments

Scarlettlee 3-Mar-11 21:51pm

To reach my goal, the "public" and "static" are both needed as I have tested it to draw this conclusion.

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#realJSOP · Accepted Answer · 2011-03-03T01:52:00

Solution 1

C#

j = QueryAnalysis.i;

Posted 3-Mar-11 1:52am

#realJSOP

Comments

CS2011 3-Mar-11 13:49pm

John..will it work....i don't see int i as public member ?

#realJSOP 4-Mar-11 5:50am

It says "public static" in the code he posted.

Scarlettlee 3-Mar-11 21:47pm

John Simmons & chanakya1984, thank you both for your great help!
I have solved the problem by adding "public" to "i",and then use j = QueryAnalysis.i;