There&#39;s also the `Request.IsAjaxRequest` if you&#39;re using a later version of MVC. I don&#39;t have version 1 anymore so I can&#39;t say if it&#39;s in version 1.


If you need this check in Global.asax.cs try this:
`new HttpRequestWrapper(Request).IsAjaxRequest()`

All AJAX calls made by jQuery will have a header added to indicate it is AJAX. The header to check is `X-Requested-With`, and the value will be `XMLHttpRequest` when it is an AJAX call.

Note that AJAX requests are normal GETs or POSTs, so unless you (or your AJAX library like jQuery) are adding an additional header in the request, there is no way to know for certain whether it is AJAX or not.

It works for me in ASP.NET MVC 3

    if (Request.IsAjaxRequest())
    {
         // ajax request handled
    }


What do the icons in the following screen capture mean? The icons are from Subclipse, an SVN plugin for Eclipse.

![outgoing][1]

I&#39;m not asking about the base file icons, I know those (HTML file and Java source file). I&#39;m asking about the right-pointing dark gray arrows, which are labeled &quot;outgoing.&quot; What does that imply? Outgoing from the IDE to the repo, or outgoing from the repo to the IDE? Why are there minus signs inside the arrows? Sometimes, I see plus signs instead; other times, just empty arrows. What&#39;s the difference?

There are also left-pointing blue arrows and double-headed red arrows; what do those mean? What about cases when they contain other symbols, like `-` and `+`?

&lt;!-- ![changed][2] ![conflict][3] ![incoming][4] --&gt;

&gt; Note: This question has been edited pretty drastically. Normally I wouldn&#39;t change so much, but it had nearly no activity and was a dupe. The original question asked for an &quot;icon glossary&quot; that would explain all or most of Subclipse&#39;s icons, similar to [this one for Eclipse](http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm). I&#39;d still love to know about one of those, but there just doesn&#39;t seem to be one out there.

  [1]: http://i.stack.imgur.com/uOWoH.png
  [2]: http://i.stack.imgur.com/32XfT.png
  [3]: http://i.stack.imgur.com/KZyD6.png
  [4]: http://i.stack.imgur.com/UC0dv.png

What do the arrow icons in Subclipse mean?

I&#39;m having problems getting this to work.  I first tried setting my script tags as strings and then using jquery replaceWith() to add them to the document after page load:

    var a = &#39;&lt;script type=&quot;text/javascript&quot;&gt;some script here&lt;/script&gt;&#39;;
    $(&#39;#someelement&#39;).replaceWith(a);

But I got string literal errors on that var.  I then tried encoding the string like:

    var a = &#39;&amp;left;script type=&quot;text/javascript&quot;&amp;gt;some script here&amp;lt;\/script&amp;gt;&#39;;

but sending that to `replaceWith()` outputs just that string to the browser.

Can someone please let me know how you would go about dynamically adding a `&lt;script&gt;` tag into the browser after page load, ideally via jQuery?

How to dynamically insert a &lt;script&gt; tag via jQuery after page load?

anybody how can I know if the request is ajax ? (I&#39;m using jquery for ajax)

how to know if the request is ajax in asp.net mvc?

<p>anybody how can I know if the request is ajax ? (I'm using jquery for ajax)</p>


I know i can do this

    var nv = HttpUtility.ParseQueryString(req.RawUrl);

But is there a way to convert this back to a url?

    var newUrl = HttpUtility.Something(&quot;/page&quot;, nv);

NameValueCollection to URL Query?

What exactly is an application pool?  What is its purpose?

What is an IIS application pool?

Got the following [ProviderException][0] : 

 &gt; The Role Manager feature has not been enabled.

So far so good. 

Is there somewhere a method that can be called to check if the Role Manager has been enabled or not? 

[0]:https://msdn.microsoft.com/en-us/library/system.configuration.provider.providerexception(v=vs.110).aspx

The Role Manager feature has not been enabled

What is the best way to retrieve the display name attribute for an item in your model? I see a lot of people using the LabelFor helper for everything, but a label isn&#39;t appropriate if I just want to list the data out. Is there an easy way just get the Name Attribute if I just want to print it out in, say a paragraph?

Get DisplayName Attribute without using LabelFor Helper in asp.net MVC

Can anybody tell me that how I can get current month and year and show it in a label in ASP.NET?

how to get current month and year

Although I have read the documentation on Html.HiddenFor, I&#39;ve not grasped what is it used for...

Could somebody explain its uses and give a short example?

Where should those helpers go in the code? 

What does Html.HiddenFor do?

I am using the default asp.net MVC 2 syntax to construct TextBox&#39;s which are integer or decimal for my asp.net MVC web app:

    &lt;%: Html.TextBoxFor(model =&gt; model.Loan.InterestRate) %&gt;

pretty straight forward, but the problem is inherently of the fact my binding model objects are decimal or int and non-nullable, they print their value as zero (0) on page load if my model is empty (such as in add mode for a CRUD template) and zero is an incorrect value and is invalid for my page validation also.

How could I have textboxes which have no starting value, just an empty textbox, I understand zero is a potential value, but I only accept values greater than zero anyway, so this is not a problem for me.

I even tried casting as a nullable decimal and also a non-for helper (which is not ideal), but alas, I am still receiving the default &#39;0&#39; value. any ideas??

    &lt;%: Html.TextBox(&quot;Loan.InterestRate&quot;, Model.Loan.InterestRate == 0 ? 
        (decimal?)null : Model.Loan.InterestRate) %&gt;


Html.TextboxFor default value for Integer/Decimal to be Empty instead of 0

In trying to get my application to produce 404 errors correctly, I have implemented a catch all route at the end of my route table, as shown below:

     routes.MapRoute(
                &quot;NotFound&quot;, _
               &quot;{*url}&quot;, _
               New With {.controller = &quot;Error&quot;, .action = &quot;PageNotFound&quot;} _
           )

However, to get this working, I had to remove the default route:

    {controller}/action/{id}

But now that the default has been removed, most of my action links no longer work, and the only way I have found to get them working again is to add individual routes for each controller/action. 

Is there a simpler way of doing this, rather than adding a route for each controller/action? 

Is it possible to create a default route that still allows the catch all route to work if the user tries to navigate to an unknown route?

ASP.NET MVC - Catch All Route And Default Route

I notice Scott Guthrie is starting to [mention Razor][1] a [fair bit][2] on his blog but I&#39;m just not that sure that it&#39;s a good fit for my style.

Granted it&#39;s a fairly unfamiliar style for someone who&#39;s pretty used to a &quot;standard&quot; sort of ASP.Net markup (content place holders and inline code), but it just feels like a lot of additional pages to manage and less clear markup to me.

What are other peoples&#39; feelings on it?  Is it something that you believe should be seriously considered when scaffolding new MVC pages or is it just trying to solve a problem that doesn&#39;t exist?


  [1]: http://weblogs.asp.net/scottgu/archive/2010/07/02/introducing-razor.aspx
  [2]: http://weblogs.asp.net/scottgu/archive/2010/10/22/asp-net-mvc-3-layouts.aspx

Does Razor syntax provide a compelling advantage in UI markup?

What is the difference between `$.ajax()` and `$.get()` and `$.load()`?

Which is better to use and in what conditions?

Difference between $.ajax() and $.get() and $.load()

I cannot find an answer to this one:

My AJAX calls return JSON data. In Google Chrome Developer Tools &gt; Resources &gt; XHR when I click on the resource on the left and then on the Content tab I see the JSON string as a string and not as a tree as Firebug and Firebug Lite do.

How do I force Chrome to display it as a tree. Is there a Content-type that my PHP file must have???


Google Chrome display JSON AJAX response as tree and not as a plain text

I&#39;m fairly new to RoR and recently started learning BDD/Rspec for testing my application.  I&#39;ve been looking for a way to spec an AJAX request, but so far I haven&#39;t found much documentation on this at all.  

Anyone know how to do this?  I&#39;m using rails 2.3.8, rspec 1.3.0 and mocha 0.9.8 for my stubs (which I&#39;m also in the process of  learning...)

How do you test an AJAX request with RSpec/RoR?

Admittedly, there are similar questions lying around on Stack Overflow, but it seems none quite meet my requirements.

Here is what I&#39;m looking to do:

* Upload an entire form of data, one piece of which is a **single** file
* Work with Codeigniter&#39;s file upload library

Up until here, all is well. The data gets in my database as I need it. But I&#39;d also like to submit my form via an AJAX post:

* Using the native HTML5 File API, not flash or an iframe solution
* Preferably interfacing with the low-level `.ajax()` jQuery method

I think I could imagine how to do this by auto-uploading the file when the field&#39;s value changes using pure javascript, but I&#39;d rather do it all in one fell swoop on for submit in jQuery. I&#39;m thinking it&#39;s not possible to do via query strings as I need to pass the entire file object, but I&#39;m a little lost on what to do at this point. 

Can this be achieved?

Using HTML5 file uploads with AJAX and jQuery

Will web sockets when used in all web browsers make ajax obsolete?

Cause if I could use web sockets to fetch data and update data in realtime, why would I need ajax? Even if I use ajax to just fetch data once when the application started I still might want to see if this data has changed after a while.

And will web sockets be possible in cross-domains or only to the same origin?

Content Type	Original Author	Original Content on Stackoverflow
Question	Omu	View Question on Stackoverflow
Solution 1 - asp.net	Buildstarted	View Answer on Stackoverflow
Solution 2 - asp.net	D'Arcy Rittich	View Answer on Stackoverflow
Solution 3 - asp.net	Piotr Czyż	View Answer on Stackoverflow

how to know if the request is ajax in asp.net mvc?

asp.net Problem Overview

asp.net Solutions

Solution 1 - asp.net

Solution 2 - asp.net

Solution 3 - asp.net

How to dynamically insert a <script> tag via jQuery after page load?

What do the arrow icons in Subclipse mean?

Attributions