How to access struct from same class?

Question

1.00/5 (1 vote)

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Hello guys,

I have the following code.

C#

struct Item
        {
            // VNUM
            int iVnum;
            int iPrice;

            // NAME
            string iStrName;

            // INDEX
            int iEqSlot;
            int iSPCardID;
            int iFairyID;

            // TYPE
            int iClass;

            // FLAG
            int iMale;
            int iFemale;

            int iSellable;
            int iDropable;
            int iTradable;

            // DATA
            int iLvReq;
            int iJlDef;
            int iCDef;
            int iFDef;
            int iMDef;
            int iDodge;
            int iJlReq;
            int iRepReq;
            int iDmgMin;
            int iDmgMax;
            int iHitrate;
            int iCritChance;
            int iCritDmg;

            int iResF;
            int iResW;
            int iResL;
            int iResS;

        }

       public static void readDatFile(string path)
        {
            Item i;
            
            using (StreamReader sr = new StreamReader(path, Encoding.Default, true))
            {
                string line;
                string[] values;
                int length;

                while ((line = sr.ReadLine()) != null)
                {
                    values = line.Split('\t');
                    length = values.Length;
                    
                        if (length == 4 && values[1] == "VNUM")
                        {
                            i.iVnum = 1;
                        }

                }
            }

        }

But why can't I access the declared Item i ?
if I type in at

C#

if (length == 4 && values[1] == "VNUM") "i."

then no variable from Item appears.

Do you know how to help me?

Posted 9-Nov-14 7:39am

IceTrailer

Updated 9-Nov-14 7:44am

v4

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Comments

Afzaal Ahmad Zeeshan 9-Nov-14 13:42pm

Does it throw any error?

IceTrailer 9-Nov-14 13:43pm

No, I only can't access the vars from struct Item..

Afzaal Ahmad Zeeshan 9-Nov-14 13:44pm

How does it tell you that you can't access the struct?

IceTrailer 9-Nov-14 13:47pm

IntelliSense of Visual Studio 2013 only displays following possibilities
- Equals
- GetHashCode
- GetType
- ToString

Uh, and this error appears if I use i.iVnum = 1;
The access at "ClientExtraction.Functions.Item.iVnum" is because of the safety level not possible

Sergey Alexandrovich Kryukov 9-Nov-14 13:50pm

It's not "vars". Do you know what a member is?
—SA

Sergey Alexandrovich Kryukov 9-Nov-14 13:50pm

"Throw" is the term only applicable to exception. The code won't compile, so you cannot talk about exceptions.
Please see my answer.
—SA

Afzaal Ahmad Zeeshan 9-Nov-14 13:57pm

yeah sorry, I thought there was an error assigning the values.

Sergey Alexandrovich Kryukov 9-Nov-14 13:49pm

The question does not seem to make much sense. Look at the title. Class and struct are types, and there are instances of the type. The member you are trying to access is the instance members. So, what would "access from a class" even mean?
—SA

BillWoodruff 9-Nov-14 15:07pm

I wonder if your goal here isn't to read a file containing one or more text-descriptions that map to instances of 'Item and transform what you read into instances of Item, or a list of Item ?

If that is your goal, then you may want to start studying serialization and de-serializtion in .NET.

2 solutions

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-11-09T07:47:00

Solution 1

This is because iVum is private (default); to be accessible, it should be internal or public.

Your code and post look as if you tried to write some application before reading a manual on the language and platform. Such approach is counter-productive.

—SA

Posted 9-Nov-14 7:47am

Sergey Alexandrovich Kryukov

Updated 9-Nov-14 7:57am

v2

Comments

Afzaal Ahmad Zeeshan 9-Nov-14 13:52pm

Sir, you needed to write public not private (in the first paragraph, last word). :-)

He has already set it to private (by He I mean .NET of course).

Sergey Alexandrovich Kryukov 9-Nov-14 13:57pm

Thank you very much, I fixed it.
It should be internal or public; internal is usually better. :-)
—SA

Afzaal Ahmad Zeeshan 9-Nov-14 13:59pm

I am not that much good in these things, I usually set everything to public ;-)

But since you've mentioned I will give it a read now. :-)

..and yeah, you're welcome ;)

Sergey Alexandrovich Kryukov 9-Nov-14 14:40pm

Isn't that trivial: internal is like public, only not giving access outside of declaring assembly?
And I believe that the access should be as constrained as possible.
—SA

IceTrailer 9-Nov-14 13:53pm

Thank you for posting your solution. It works.

Sorry, I missed out to look if the error could be in struct Item.

Sergey Alexandrovich Kryukov 9-Nov-14 13:58pm

You are very welcome.
Good luck call again.
—SA

Afzaal Ahmad Zeeshan 9-Nov-14 13:58pm

You should learn about the accessibility in .NET first and understand how to fetch items from Item in your other classes. Read this: http://msdn.microsoft.com/en-us/library/ba0a1yw2.aspx and see my Answer too.

Maciej Los 9-Nov-14 15:54pm

+5

Sergey Alexandrovich Kryukov 9-Nov-14 15:55pm

Thank you, Maciej.
—SA

Afzaal Ahmad Zeeshan · Accepted Answer · 2014-11-09T07:51:00

In your comment you added the most valuable piece of information to the question.

Quote:
IntelliSense of Visual Studio 2013 only displays following possibilities
- Equals
- GetHashCode
- GetType
- ToString

This is because the members (properties) of the struct are set to the default private accessor (mock me if these public, private are called something else I am not good in this one). You need to set them to public. So that everything that access them. This means that Visual Studio's IntelliSense was not able to fetch any of the members or properties for you to use and thus only 4 options were provided, which are (AFAIK) inherited from System.Object.

They are really very lengthy, but I can show you an example.

C#

// set a public with them
public int iVnum;
public int iPrice;

Now they will be accessible by the code. Every member or property or function that you set to be public can be accessed. You can learn more on these, here on MSDN[^].