CODEWITHSUNDEEP
c#asp.net-mvcasp.net-apicontroller
sinitram
sinitram

Reputation: 534

An object of ApiController for each request ASP.NET

Will a new object of API Controller creating after each request to the page?

So I need to know if condition #1 is always true or not?

public class ProductsController : ApiController {
    private int _reqState = -1;

    public object Get(int id) {
        if (_reqState == -1}  {} //condition #1
        //DO SOME WORK WITH _reqState
    }
}

Upvotes: 0

Views: 253

Answers (2)

Luke
Luke

Reputation: 23690

Assuming that the value of _reqState is not changed between the invocation of your Action method (Get()) and then conditional check, or in your controller constructor - then yes the condition is always true.

public class ProductsController : ApiController {

    public ProductsController()
    {
        // As long as _reqState is not changed here
    } 

    private int _reqState = -1;

    public object Get(int id) {

        // ... or here

        if (_reqState == -1}  {} //condition #1 - always true
        //DO SOME WORK WITH _reqState
    }
}

The value set for _reqState is not carried across multiple requests as the controller is created and destroyed with each request.

So the value of _reqState is not the same instance of the variable each time, it's a newly set -1 value.

Upvotes: 0

Patrick Hofman
Patrick Hofman

Reputation: 156988

Yes, a controller has a short lifetime, just for this request. After that it is disposed and your value is lost.

If you want to keep some state, you have to use Session, Application or an external storage to save your state.

For example:

private int ReqState
{
    get
    {
        return (this.HttpContext.Session["ReqState"] as int?).GetValueOrDefault(-1);
    }
    set
    {
        this.HttpContext.Session["ReqState"] = value;
    }
}

Upvotes: 1

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