Add to your web.config:-

    &lt;system.web&gt;
        &lt;sessionState cookieName=&quot;foo&quot; /&gt;
    &lt;/system.web&gt;
    

You can set this in the `&lt;sessionState&gt;` configuration setting in your web.config file:

    &lt;system.web&gt;
        &lt;sessionState cookieName=&quot;myCookieName&quot; /&gt;
    &lt;/system.web&gt;

See [sessionState Element][1]. look at the cookieName attribute, which will change it from the default of &quot;ASP.NET_SessionId&quot;.


  [1]: http://msdn.microsoft.com/en-us/library/h6bb9cz9.aspx

Yes. You can do it in your web.config file:

    &lt;sessionState cookieName=&quot;foo&quot; /&gt;



I don&#39;t recall it correctly but I think you can rename it by changing the `web.config` file.

Seach for the [`sessionState`][1] element of the `web.config`.


  [1]: http://msdn.microsoft.com/en-us/library/h6bb9cz9.aspx

If anyone has got here looking for a solution compatible with ASP.NET Core, this can be normally specified within the Startup, as a parameter of the CookieBuilder, e.g:

     .AddCookie(options =&gt;
                {
                    options.LoginPath = new PathString(&quot;/Login&quot;);
                    options.Cookie = new CookieBuilder()
                    {
                        IsEssential = true,
                        SameSite = SameSiteMode.Lax,
                        SecurePolicy = CookieSecurePolicy.SameAsRequest,
                        Name = &quot;MyOwnCookieName&quot;
                    };
                })



Being new to ASP.NET MVC, I&#39;ve been wondering about the signature of Controller methods. In all the examples I&#39;ve seen, they always seem to return ActionResult, even if they actually return a ViewResult instance or similar.

Here&#39;s a commonly seen example:

    public ActionResult Index()
    {
        return this.View();
    }

In such a case, wouldn&#39;t it make more sense to declare the method as `public ViewResult Index()`, and get stronger type support?

Experimentation indicates that this works, so it seems possible.

I do realize that there may be situations where the polymorphism is desired (e.g. if you want to redirect only in certain situations, but show a view in other situations), but if the method *always* returns a view, I&#39;d find a ViewResult more desirable.

In terms of future compatibility, ActionResult obviously provides a more robust signature, but if one controls the entire code base, it&#39;s always possible to change a method&#39;s signature to a more general return type if that should become necessary in the future.

Are the any other considerations that I&#39;m not aware of, or should I just go ahead and declare my controller methods with specific return types?

Must ASP.NET MVC Controller Methods Return ActionResult?

I have a class that is provided to me by an external library. I have created a subclass of this class. I also have an instance of the original class.

I now want to turn this instance into an instance of my subclass without changing any properties that the instance already has (except for those that my subclass overrides anyway).

The following solution seems to work.

    # This class comes from an external library. I don&#39;t (want) to control
    # it, and I want to be open to changes that get made to the class
    # by the library provider.
    class Programmer(object):
        def __init__(self,name):
            self._name = name
            
        def greet(self):
            print &quot;Hi, my name is %s.&quot; % self._name
            
        def hard_work(self):
            print &quot;The garbage collector will take care of everything.&quot;
            
    # This is my subclass.
    class C_Programmer(Programmer):
        def __init__(self, *args, **kwargs):
            super(C_Programmer,self).__init__(*args, **kwargs)
            self.learn_C()
            
        def learn_C(self):
            self._knowledge = [&quot;malloc&quot;,&quot;free&quot;,&quot;pointer arithmetic&quot;,&quot;curly braces&quot;]
            
        def hard_work(self):
            print &quot;I&#39;ll have to remember &quot; + &quot; and &quot;.join(self._knowledge) + &quot;.&quot;
    
        # The questionable thing: Reclassing a programmer.
        @classmethod
        def teach_C(cls, programmer):
            programmer.__class__ = cls # &lt;-- do I really want to do this?
            programmer.learn_C()
    
    
    joel = C_Programmer(&quot;Joel&quot;)
    joel.greet()
    joel.hard_work()
    #&gt;Hi, my name is Joel.
    #&gt;I&#39;ll have to remember malloc and free and pointer arithmetic and curly braces.
    
    jeff = Programmer(&quot;Jeff&quot;)
    
    # We (or someone else) makes changes to the instance. The reclassing shouldn&#39;t
    # overwrite these.
    jeff._name = &quot;Jeff A&quot; 
    
    jeff.greet()
    jeff.hard_work()
    #&gt;Hi, my name is Jeff A.
    #&gt;The garbage collector will take care of everything.
    
    # Let magic happen.
    C_Programmer.teach_C(jeff)
    
    jeff.greet()
    jeff.hard_work()
    #&gt;Hi, my name is Jeff A.
    #&gt;I&#39;ll have to remember malloc and free and pointer arithmetic and curly braces.

However, I&#39;m not convinced that this solution doesn&#39;t contain any caveats I haven&#39;t thought of (sorry for the triple negation), especially because reassigning the magical `__class__` just doesn&#39;t feel right. Even if this works, I can&#39;t help the feeling there should be a more pythonic way of doing this.

Is there?

----------

Edit: Thanks everyone for your answers. Here is what I get from them:

* Although the idea of reclassing an instance by assigning to `__class__` is not a widely used idiom, most answers (4 out of 6 at the time of writing) consider it a valid approach. One anwswer (by ojrac) says that it&#39;s &quot;pretty weird at first glance,&quot; with which I agree (it was the reason for asking the question). Only one answer (by Jason Baker; with two positive comments &amp; votes) actively discouraged me from doing this, however doing so based on the example use case moreso than on the technique in general.

* None of the answers, whether positive or not, finds an actual technical problem in this method. A small exception is jls who mentions to beware of old-style classes, which is likely true, and C extensions. I suppose that new-style-class-aware C extensions should be as fine with this method as Python itself (presuming the latter is true), although if you disagree, keep the answers coming.

As to the question of how pythonic this is, there were a few positive answers, but no real reasons given. Looking at the Zen (`import this`), I guess the most important rule in this case is &quot;Explicit is better than implicit.&quot; I&#39;m not sure, though, whether that rule speaks for or against reclassing this way.

* Using `{has,get,set}attr` seems more explicit, as we are explicitly making our changes to the object instead of using magic.

* Using `__class__ = newclass` seems more explicit because we explicitly say &quot;This is now an object of class &#39;newclass,&#39; expect a different behaviour&quot; instead of silently changing attributes but leaving users of the object believing they are dealing with a regular object of the old class.

Summing up: From a technical standpoint, the method seems okay; the pythonicity question remains unanswered with a bias towards &quot;yes.&quot; 

I have accepted Martin Geisler&#39;s answer, because the Mercurial plugin example is a quite strong one (and also because it answered a question I even hadn&#39;t asked myself yet). However, if there are any arguments on the pythonicity question, I&#39;d still like to hear them. Thanks all so far.

P.S. The actual use case is a UI data control object that needs to grow additional functionality *at runtime*. However, the question is meant to be very general.


Reclassing an instance in Python

I need to rename the ASP.NET_SessionId cookie created by default by ASP.NET. Let&#39;s say I want it&#39;s named &quot;foo&quot;. Is it possible?

Rename ASP.NET_SessionId

<p>I need to rename the ASP.NET_SessionId cookie created by default by ASP.NET. Let's say I want it's named "foo". Is it possible?</p>


How can I get the MIME type from a file extension?

Get MIME type from filename extension

For an application I&#39;m working on, I need to allow the user to upload very large files--i.e., potentially many gigabytes--via our website.  Unfortunately, ASP.NET MVC appears to load the entire request into RAM before beginning to service it--not exactly ideal for such an application.  Notably, trying to circumvent the issue via code such as the following:

    if (request.Method == &quot;POST&quot;)
    {
        request.ContentLength = clientRequest.InputStream.Length;
        var rgbBody = new byte[32768];

        using (var requestStream = request.GetRequestStream())
        {
            int cbRead;
            while ((cbRead = clientRequest.InputStream.Read(rgbBody, 0, rgbBody.Length)) &gt; 0)
            {
                fileStream.Write(rgbBody, 0, cbRead);
            }
        }
    }

fails to circumvent the buffer-the-request-into-RAM mentality.  Is there an easy way to work around this behavior?

Streaming large file uploads to ASP.NET MVC

How do I access the ModelState from within my View (aspx page)?

Can .NET (managed code) read and write to CouchDB? 

I would like to build a part of my project that does document management using CouchDB

Use CouchDB with .NET

I just used the XmlWriter to create some XML to send back in an HTTP response.  How would you create a JSON string.  I assume you would just use a stringbuilder to build the JSON string and them format your response as JSON?

Content Type	Original Author	Original Content on Stackoverflow
Question	Robert	View Question on Stackoverflow
Solution 1 - asp.net	AnthonyWJones	View Answer on Stackoverflow
Solution 2 - asp.net	Kev	View Answer on Stackoverflow
Solution 3 - asp.net	RichardOD	View Answer on Stackoverflow
Solution 4 - asp.net	Rune Grimstad	View Answer on Stackoverflow
Solution 5 - asp.net	Paulo Santos	View Answer on Stackoverflow
Solution 6 - asp.net	mikus	View Answer on Stackoverflow

Rename ASP.NET_SessionId

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Reclassing an instance in Python

Must ASP.NET MVC Controller Methods Return ActionResult?

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