`::1` is for `localhost`, Maybe [this](https://superuser.com/questions/174715/is-there-a-way-to-disable-ipv6-in-googles-chrome)
might be useful.

This is not a bug - you&#39;re connecting from [localhost](http://en.wikipedia.org/wiki/Localhost) on an [IPv6](http://en.wikipedia.org/wiki/Ipv6) enabled machine.  `::1` is the loopback address - [a double colon means &quot;omitted zeroes&quot;](http://en.wikipedia.org/wiki/IPv6#Address_Format), so this address corresponds to address 1.

If you&#39;re developing *new* software, I&#39;d urge you *not* to disable IPv6.  The easiest time to implement support is right from the start, and spending time on workarounds is perhaps just wasting effort putting off the inevitable.

Although it&#39;s true that this is not a bug, maybe you can check [this link](http://redhead-it.com/blog/2009/05/httpcontextcurrentrequestuserhostaddress-returns-1/), where your problem is nicely described and &quot;solved&quot;. It says that the way the issue behaves depends on the operating system, since a user fixed some problems in an application running in *Windows Server 2008* by commenting the `::1` line in the *hosts* file, while he had to uncomment it in *Windows 7*.

Hope you managed to solve that! Good luck!

it is not bug actually you are running your application on local host it is just giving you the ip of of local host and it is ipv6 format

I&#39;m looking for a free open source tool-set that will compile various &quot;classic&quot; scripting languages, e.g. Korn Shell, ksh, csh, bash etc. as an executable -- and if the script calls other programs or executables, for them to be included in the single executable.

Reasons:

1. To obfuscate the code for delivery to a customer so as not to reveal our Intellectual Property - for delivery onto a *customer&#39;s* own machine/systems for which I have no control over what permissions I can set regarding access, so the program file has to be binary whereby the workings cannot be easily seen by viewing in a text editor or `hexdump` viewer.

2. To make a single, simply deployed program for the customer without/or a minimal amount of any external dependencies.

I would prefer something simple without the need for package manager since:

1. I can&#39;t rely on the customer&#39;s knowledge to carry out (un) packaging instructions and

2. I can&#39;t rely on the policies governing their machines regarding installing packages (and indeed from third parties). 

The simplest preferred approach is to be able to compile to proper machine code a single executable that will run out of the box without any dependencies.

How to compile a linux shell script to be a standalone executable *binary* (i.e. not just e.g. chmod 755)?

I have an ASP.NET form that takes input from a user. There&#39;s a `Submit` button on the form and a button called `Calc` which does a calculation to populate a text field. The problem I&#39;m having is that on the form I have a set of `&lt;ASP:REQUIREDFIELDVALIDATOR&gt;` validators and when the `Calc` button is pressed the form gets validated. I don&#39;t want the required fields to be validated when the `Calc` button is pressed, only the `Submit` button. Any way around this?

How to bypass validation for a button in ASP.NET?

I am trying to get client ip address using 

        HttpContext.Request.UserHostAddress;


but it returns `::1`.

How to solve this?

Request.UserHostAddress issue with return result &quot;::1&quot;

I am trying to get client ip address using
<pre><code class="hljs language-ini"> HttpContext.Request.UserHostAddress;
</code></pre>
but it returns <code>::1</code>.
How to solve this?

I&#39;ve got a generics class, where I want to instantiate an object with the generic type. I want to use an argument for the constructor of the type.

My code:

    public class GenericClass&lt;T&gt; where T : Some_Base_Class, new()
    {
        public static T SomeFunction(string s)
        {
            if (String.IsNullOrEmpty(s))
                return new T(some_param);
        }
    }


I get an error on the

    new T(some_param)

&gt; *&#39;T&#39;: cannot provide arguments when creating an instance of a variable
&gt; type*

Any ideas how can I do this?




Generics in C# - how can I create an instance of a variable type with an argument?

I&#39;m using .NET 2.0 and I&#39;m trying to bind a combobox&#39;s Datasource to a sorted dictionary.

So the error I&#39;m getting is &quot;DataMember property &#39;Key&#39; cannot be found on the Datasource&quot;.

            SortedDictionary&lt;string, int&gt; userCache = UserCache.getSortedUserValueCache();
            userListComboBox.DataSource = new BindingSource(userCache, &quot;Key&quot;); //This line is causing the error
            userListComboBox.DisplayMember = &quot;Key&quot;;
            userListComboBox.ValueMember = &quot;Value&quot;;

Binding Combobox Using Dictionary as the Datasource

Suppose I have a string:

    &quot;34234234d124&quot;

I want to get the last four characters of this string which is `&quot;d124&quot;`. I can use `SubString`, but it needs a couple of lines of code, including naming a variable.

Is it possible to get this result in one expression with C#?


How do I get the last four characters from a string in C#?

If I have an enum like so:

    enum Beer
    {
        Bud = 10,
        Stella = 20,
        Unknown
    }

Why does it not throw an exception when casting an `int` that is outside of these values to a type of `Beer`?

For example the following code doesn&#39;t throw an exception, it outputs &#39;50&#39; to the console:

    int i = 50;
    var b = (Beer) i;
    
    Console.WriteLine(b.ToString());

I find this strange...can anyone clarify?



Why does casting int to invalid enum value NOT throw exception?

When writing a query using C# LINQ syntax, is there a way to use the Queryable.SelectMany method from the keyword syntax?

For 

    string[] text = { &quot;Albert was here&quot;, 
                      &quot;Burke slept late&quot;, 
                      &quot;Connor is happy&quot; };

Using fluent methods I could query

    var tokens = text.SelectMany(s =&gt; s.Split(&#39; &#39;));

Is there a query syntax akin to

    var tokens = from x in text selectmany s.Split(&#39; &#39;)





Is there a C# LINQ syntax for the Queryable.SelectMany() method?

Okay, so I want to display a list containing lists of lists of lists...

I have no way of knowing how many levels there are to display, so I figured this is where I break out the old recursive routine.

I&#39;m having trouble with exactly how to go about this though.

This is what I have so far (in view - simplified):

    @foreach(MyObject item in @Model.ListOfObjects){ 
        &lt;div&gt; @item.Title &lt;/div&gt;
        //Call recursive function?
    }

Now each of these objects also have a List&amp;lt;MyObject&gt;. I want to display each level below this div, with a tab indent per level for instance.

I was thinking a Razor function would be the thing to do here, but I need some help in forming it. Here&#39;s my thinking:

    @functions{
        public static void ShowSubItems(MyObject _object){
             if(_object.ListOfObjects.Count&gt;0){
                 foreach(MyObject subItem in _object.listOfObjects){

                     // Show subItem in HTML
                     ShowSubItems(subItem);
                 }
             }
         }
     }

But as you can see, I plainly need some help :)





ASP.NET MVC 3 Razor recursive function

How can I access JavaScript value inside `@URL.Action()`?
something like: 

    &lt;script type=&quot;text/javascript&quot;&gt;
    function name(myjavascriptID)
    {
         jQuery(&quot;#list_d&quot;).jqGrid(&#39;setGridParam&#39;, { url: &#39;@URL.Action(&quot;download file&quot;, &quot;download&quot;, new { id = &lt;myjavascriptID&gt; })&#39;, page: 1 });
        
    }
    &lt;/script&gt;

How to access javascript variable within @URL.Action()

Why does `Request[&quot;parameterName&quot;]` returns null within the view? I know I can get it from the controller but I have to make a little check in the View. I am using ASP.NET MVC 3.

c# razor url parameter from view

I need to create a function that is only necessary inside one cshtml file. You can think of my situation as ASP.NET page methods, which are min web services implemented in a page, because they&#39;re scoped to one page. I know about HTML helpers (extension methods), but my function is just needed in one cshtml file. I don&#39;t know how to create a function signature inside a view.
**Note**: I&#39;m using Razor template engine.

How to create a function in a cshtml template?

What&#39;s the benefit of setting an alias for an action method using the &quot;ActionName&quot; attribute? I really don&#39;t see much benefit of it, in providing the user the option to call an action method with some other name. After specifying the alias, the user is able to call the action method only using the alias. But if that is required then why doesn&#39;t the user change the name of the action method rather then specifying an alias for it?

I would really appreciate if anyone can provide me an example of the use of &quot;ActionName&quot; in a scenario where it can provide great benefit or it is best to use.  

Purpose of ActionName

what is the right field type for IP address in mysql? and what is the right way of storing it using PHP?

IP address storing in MySQL database using PHP

just a question for my understanding. on my mac when I use `ifconfig` command on my mac I get the following interfaces:

 - en0
 - en1
 - lo0
 - fw0
 - vment0
 - vment1

I don&#39;t understand why there are so many. I understand that eth0 would be for LAN connections, and that en0 is the wireless connection. But macbook only has one airport..so why en1 as well? not sure what vments are for either. 

ifconfig and interfaces

How can I determine the IP address of a given request from within a controller? For example (in express):

    app.post(&#39;/get/ip/address&#39;, function (req, res) {
        // need access to IP address here
    })

How to determine a user&#39;s IP address in node

I am trying to develop a system where there are different nodes that are run on different system or on different ports on the same system. 

Now all the nodes create a Socket with a target IP as the IP of a special node known as a bootstrapping node. The nodes then create their own `ServerSocket` and start listening for connections. 

The bootstrapping node maintains a list of Nodes and returns them on being queried.

Now what I need is the node must register its IP to the bootstrapping node. I tried using `cli.getInetAddress()` once the client connects to the `ServerSocket` of bootstrapping node but that didn&#39;t work.

 1. I need the client to register its PPP IP if available;
 2. Otherwise the LAN IP if available; 
 3. Otherwise it must register 127.0.0.1 assuming its the same computer.

Using the code:

    System.out.println(Inet4Address.getLocalHost().getHostAddress());

or

    System.out.println(InetAddress.getLocalHost().getHostAddress());

My PPP Connection IP address is: 117.204.44.192 but the above returns me 192.168.1.2

**EDIT**

I am using the following code:

    Enumeration e = NetworkInterface.getNetworkInterfaces();
    while(e.hasMoreElements())
    {
        NetworkInterface n = (NetworkInterface) e.nextElement();
        Enumeration ee = n.getInetAddresses();
        while (ee.hasMoreElements())
        {
            InetAddress i = (InetAddress) ee.nextElement();
            System.out.println(i.getHostAddress());
        }
    }

I am able to get all the IP addresses associated all `NetworkInterface`s, but how do I distinguish them? This is the output I am getting:

    127.0.0.1
    192.168.1.2
    192.168.56.1
    117.204.44.19

Getting the IP address of the current machine using Java

Is there a way to figure out the country name just by looking at an IP address? I mean, do countries have specific ranges of IP addresses? For example, Australia can have IP addresses only in the range of `123.45.56.89 - 231.54.65.98` (just an example)

Identifying country by IP address

I have a C# ASP.NET application which starts about 25 different threads running some methods in a class called SiteCrawler.cs. 

In `HttpContext.Current.Session` I want to save the result of the search made by the user and present it to the user when all the threads are finished running. My problem is that the `HttpContext.Current` object is null in the spawned threads because it doesn&#39;t exist there. 

What other options do I have to save user/session specific data without using session because of the limitations when the application is multithreaded?

I have tried to search around every inch of Stackoverflow to find a solution but without any luck....

Access HttpContext.Current from different threads

I have a web service I am trying to unit test.  In the service it pulls several values from the `HttpContext` like so:

     m_password = (string)HttpContext.Current.Session[&quot;CustomerId&quot;];
     m_userID = (string)HttpContext.Current.Session[&quot;CustomerUrl&quot;];

in the unit test I am creating the context using a simple worker request, like so:

    SimpleWorkerRequest request = new SimpleWorkerRequest(&quot;&quot;, &quot;&quot;, &quot;&quot;, null, new StringWriter());
    HttpContext context = new HttpContext(request);
    HttpContext.Current = context;

However, whenever I try to set the values of `HttpContext.Current.Session`

    HttpContext.Current.Session[&quot;CustomerId&quot;] = &quot;customer1&quot;;
    HttpContext.Current.Session[&quot;CustomerUrl&quot;] = &quot;customer1Url&quot;;

I get null reference exception that says `HttpContext.Current.Session` is null. 

Is there any way to initialize the current session within the unit test?

Setting HttpContext.Current.Session in a unit test

I have a value that I use in all the application; I set this in application_start

      void Application_Start(object sender, EventArgs e)
      {
        Dictionary&lt;int, IList&lt;string&gt;&gt; Panels = new Dictionary&lt;int, IList&lt;string&gt;&gt;();
        List&lt;clsPanelSetting&gt; setting = clsPanelSettingFactory.GetAll();
        foreach (clsPanelSetting panel in setting)
        {
            Panels.Add(panel.AdminId, new List&lt;string&gt;() { panel.Phone,panel.UserName,panel.Password});
        }
        Application[&quot;Setting&quot;] = Panels;

        SmsSchedule we = new SmsSchedule();
        we.Run();
       
      }

and in SmsSchedule 

    public class SmsSchedule : ISchedule
    {
        public void Run()
        {           
            DateTimeOffset startTime = DateBuilder.FutureDate(2, IntervalUnit.Second);
            IJobDetail job = JobBuilder.Create&lt;SmsJob&gt;()
                .WithIdentity(&quot;job1&quot;)
                .Build();
    
            ITrigger trigger = TriggerBuilder.Create()
                 .WithIdentity(&quot;trigger1&quot;)
                 .StartAt(startTime)
                 .WithSimpleSchedule(x =&gt; x.WithIntervalInSeconds(60).RepeatForever())
                 .Build();
    
            ISchedulerFactory sf = new StdSchedulerFactory();
            IScheduler sc = sf.GetScheduler();
            sc.ScheduleJob(job, trigger);
    
            sc.Start();
        }
    }

I want to get this value in a class.(smsjob)

       public class SmsJob : IJob 
       {  
          public virtual void Execute(IJobExecutionContext context)
          {
              HttpContext.Current.Application[&quot;Setting&quot;]; 
          }
       }

but my problem is : HttpContext.Current is null, why is HttpContext.Current null?


**Edit:**
When i use this code in another class of a page it works, but in this class I get the error.


Why is HttpContext.Current null?

My question is a bit related to this: https://stackoverflow.com/questions/23395632/webapi-equivalent-for-httpcontext-items-with-dependency-injection. 

*We want to inject a class using HttpContext.Current in WebApi area using Ninject.*

My concern is, this could be **very dangerous**, as in WebApi (*everything?*) is async.

Please correct me if I am wrong in these points, this is what I investigated so far:

1. HttpContext.Current gets the current context by Thread (I looked into the implementation directly).

2. Using HttpContext.Current inside of async Task is not possible, because it can run on another Thread.

3. WebApi uses IHttpController with method `Task&lt;HttpResponseMessage&gt; ExecuteAsync` =&gt; every request is async =&gt; you cannot use HttpContext.Current inside of action method. It could even happen, more Request are executed on the same thread by coicidence.

4. For creating controllers with injected stuff into constructors `IHttpControllerActivator` is used with **sync** method `IHttpController Create`. This is, where ninject creates Controller with all its dependencies.

---

- If I am correct in all of these 4 points, using of `HttpContext.Current` inside of an action method or any layer below is very dangerous and can have unexpected results. I saw on StackOverflow lot of accepted answers suggesting exactly this. In my opinion this can work for a while, but will fail under load.

- But when using DI to create a Controller and its dependencies, it is Ok, because this runs on one separated thread. **I could get a value from the HttpContext in the constructor and it would be safe?**. I wonder if each Controller is created on single thread for every request, as this could cause problem under heavy loads, where all threads from IIS could be consumed.

*Just to explain why I want to inject HttpContext stuff:*

  - one solution would be to get the request in controller action method and pass the needed value all the layers as param until its used somewhere deep in the code.
  - our wanted solution: all the layers between are not affected by this, and we can use the injected request somewhere deep in code (e.g. in some `ConfigurationProvider` which is dependent on URL)
  
  
 Please give me your opinion if I am totally wrong or my suggestions are correct, as this theme seems to be very complicated.

Content Type	Original Author	Original Content on Stackoverflow
Question	yohan.jayarathna	View Question on Stackoverflow
Solution 1 - C#	V4Vendetta	View Answer on Stackoverflow
Solution 2 - C#	Eamon Nerbonne	View Answer on Stackoverflow
Solution 3 - C#	FranciscoBouza	View Answer on Stackoverflow
Solution 4 - C#	Rajat Singh	View Answer on Stackoverflow

Request.UserHostAddress issue with return result "::1"

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

How to bypass validation for a button in ASP.NET?

How to compile a linux shell script to be a standalone executable binary (i.e. not just e.g. chmod 755)?

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