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Proper way to call and use C# variables?

Posted on 2009-07-08
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Last Modified: 2012-05-07
Having a bad day today and need some expert advice.

Am I even doing this right?  It seems kinda reduntant.

What I intend on doing is using the object throughout the pages, so I put it in a session.

But each time I want to access the object I got to create another one and inject it with the session object?
protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["AuditAnswer"] == null)
        {
            AnswerMainDTO AuditAnswer = new AnswerMainDTO();
            Session["AuditAnswer"] = AuditAnswer;
        }
 
    }
    protected void SelectProduct()
    {
        AnswerMainDTO AuditAnswer = new AnswerMainDTO();
        AuditAnswer = (AnswerMainDTO)Session["AuditAnswer"];
        AuditAnswer.Product = 1;
        Session["AuditAnswer"] = AuditAnswer;
    }

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Question by:Meps
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4 Comments
 
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Accepted Solution

by:
Kelevra earned 100 total points
ID: 24806532
Hi,

If there is a global variable you want to use in the entire site you could use the global.asax file!

Otherwise to answer your question you can store objects in session there are no problems in doing so!
protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["AuditAnswer"] == null)
        {
            AnswerMainDTO AuditAnswer = new AnswerMainDTO();
 
 
            Session["AuditAnswer"] = AuditAnswer;
        }
 
    }
    protected void SelectProduct()
    {
        AnswerMainDTO AuditAnswer = (maybe do a cast here) Session["AuditAnswer"];
 
        AuditAnswer.Product = 1;
 
        Session["AuditAnswer"] = AuditAnswer;
    }

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Author Comment

by:Meps
ID: 24806571
Was just going to use this object for a few pages, so I didn't want to place in the gobal.

I know the starting page, and the ending page that will use this object so creating and destroying the object there.

Just seemed kinda odd to keep on creating the object just to use it.
0
 
LVL 3

Expert Comment

by:Kelevra
ID: 24806708
Well, you see the object you instanciate (by the new word) is visible only in your current page.

You can pass it through to other classes files or function by placing it into argument.

like:


MyObject obj = new MyObject();
 
obj.this = "that";
 
//call a function using the object without having to instanciate it again!
MyFunction (obj)
 
 
here if you have a function:
 
public void MyFunction (MyObject obj)
{
//do something!
}

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Author Closing Comment

by:Meps
ID: 31601245
Thank you for the assist.  good to know I don't have to instanciate the object every time.
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