Check and download ASP.NET MVC 3 Futures on http://aspnet.codeplex.com/releases/view/58781 and see how the default source code looks. Note: this works for MVC 4 as well.

I have found `AtomicInteger`, `AtomicLong`, but where is `AtomicFloat` (or `AtomicDouble`)? Maybe there is some trick?

Java: is there no AtomicFloat or AtomicDouble?

Working with databases, how can I find MAX using relational algebra?

How can I find MAX with relational algebra?

I would like to make custom editor templates for different data types in ASP.NET MVC (to use with `Html.EditorFor()`), including rewriting the existing templates. The ultimate goal is to create a mini-framework where each editor supports javascript notifications about being changed, and I can show a message to the user that there are unsaved changes in the page. (Maybe there&#39;s something existing already?)

I can find many questions pertaining to problems with such templates, but nowhere can I find a tutorial or manual on creating them. Where do they go? Is there any special syntax? How does a template get selected? What information is available in the template and how do I access it? Etc.

So - where can I find out all about these templates?

How to create custom editor/display templates in ASP.NET MVC 3?

I would like to make custom editor templates for different data types in ASP.NET MVC (to use with <code>Html.EditorFor()</code>), including rewriting the existing templates. The ultimate goal is to create a mini-framework where each editor supports javascript notifications about being changed, and I can show a message to the user that there are unsaved changes in the page. (Maybe there's something existing already?)
I can find many questions pertaining to problems with such templates, but nowhere can I find a tutorial or manual on creating them. Where do they go? Is there any special syntax? How does a template get selected? What information is available in the template and how do I access it? Etc.
So - where can I find out all about these templates?

I want to create two `DropDownList` in a *cascade* using `MVC3` (preferably `Razor`) with `C#`.

I would like to have one dropdown where you can choose the year and another one where you can choose a specific set of months depending on the selected year.

Let&#39;s put it simple. When I choose the current year (i.e. 2011) in the dropdown list &quot;year&quot;, the dropdown list &quot;month&quot; gets populated with the months until the current month (i.e. March). For the other cases (other years) no restriction is given. Moreover it would be nice to &quot;block&quot; the dropdown list &quot;month&quot; before any element in the dropdown list &quot;year&quot; is selected.

I already looked in the Internet for some solutions, using `jQuery` or even homemade approaches, but they all refer to past versions of MVC and some commands are deprecated in `MVC3`.

Easiest way to create a cascade dropdown in ASP.NET MVC 3 with C#

How do you pass a date time (i need it to the second) to c# using jquery and mvc3. This is what I have

    var date = new Date();    
    $.ajax(
       {
           type: &quot;POST&quot;,
           url: &quot;/Group/Refresh&quot;,
           contentType: &quot;application/json; charset=utf-8&quot;,
           data: &quot;{ &#39;MyDate&#39;: &quot; + date.toUTCString() + &quot; }&quot;,
           success: function (result) {
               //do something
           },
           error: function (req, status, error) {
               //error                        
           }
       });

I can&#39;t figure out what format the date should be in, for C# to understand it.



Pass a datetime from javascript to c# (Controller)

I have an MVC3 site using Razor as its view engine.  I want my site to be skinnable.  Most of the possible skins are similar enough that they can derive from a shared master layout.

Therefore, I am considering this design:

![Planned view diagram][1]

However, I would like to be able to call `RenderSection` in the bottom layer, `_Common.cshtml`, and have it render a section that is defined in the top layer, `Detail.cshtml`.  This doesn&#39;t work: `RenderSection` apparently only renders sections that are defined the next layer up.

Of course, I can define each section in each skin.  For instance, if `_Common` needs to call `RenderSection(&quot;hd&quot;)` for a section defined in `Detail`, I just place this in each `_Skin` and it works:

    @section hd {
        @RenderSection(&quot;hd&quot;)
    }

This results in some duplication of code (since each skin must now have this same section) and generally feels messy. I&#39;m still new to Razor, and it seems like I might be missing something obvious.

When debugging, I can see the complete list of defined sections in WebViewPage.SectionWritersStack.  If I could just tell RenderSection to look through the entire list before giving up, it would find the section I need.  Alas, SectionWritersStack is non-public.

Alternatively, if I could access the hierarchy of layout pages and attempt execution of RenderSection in each different context, I could locate the section I need. I&#39;m probably missing something, but I don&#39;t see any way to do this.

Is there some way to accomplish this goal, other than the method I&#39;ve already outlined?


  [1]: http://i.stack.imgur.com/vTDHz.png

Razor Nested Layouts with Cascading Sections

I have been searching for resources on how to declare foreign key relationships and other constraints using code first EF 4.1 without much luck. Basically I am building the data model in code and using MVC3 to query that model. Everything works via MVC which is great (kudos to Microsoft!) but now I want it NOT to work because I need to have data model constraints. 

   For example, I have a Order object that has a ton of properties that are external objects (tables). Right now I can create an Order no problem, but without being able to add the foreign key or external objects. MVC3 sets this up no problem. 

   I realize that I could just add the objects myself in the controller class prior to save, but I would like the call to DbContext.SaveChanges() to fail if the constraint relationships have not been met.

&gt; NEW INFORMATION
&gt; 
&gt;    So, specifically, I would like an
&gt; exception to occur when I attempt to
&gt; save an Order object without
&gt; specifying a customer object. This
&gt; does not seem to be the behavior if I
&gt; just compose the objects as described
&gt; in most Code First EF documentation. 

Latest code:

    public class Order
    {
        public int Id { get; set; }

        [ForeignKey( &quot;Parent&quot; )]
        public Patient Patient { get; set; }

        [ForeignKey(&quot;CertificationPeriod&quot;)]
        public CertificationPeriod CertificationPeriod { get; set; }

        [ForeignKey(&quot;Agency&quot;)]
        public Agency Agency { get; set; }

        [ForeignKey(&quot;Diagnosis&quot;)]
        public Diagnosis PrimaryDiagnosis { get; set; }

        [ForeignKey(&quot;OrderApprovalStatus&quot;)]
        public OrderApprovalStatus ApprovalStatus { get; set; }

        [ForeignKey(&quot;User&quot;)]
        public User User { get; set; }

        [ForeignKey(&quot;User&quot;)]
        public User Submitter { get; set; }

        public DateTime ApprovalDate { get; set; }
        public DateTime SubmittedDate { get; set; }
        public Boolean IsDeprecated { get; set; }
    }

This is the error I get now when accessing the VS generated view for Patient:

&gt; ERROR MESSAGE
&gt;
&gt; The ForeignKeyAttribute on property
&gt; &#39;Patient&#39; on type
&gt; &#39;PhysicianPortal.Models.Order&#39; is not
&gt; valid. The foreign key name &#39;Parent&#39;
&gt; was not found on the dependent type
&gt; &#39;PhysicianPortal.Models.Order&#39;. The
&gt; Name value should be a comma separated
&gt; list of foreign key property names.



Regards,

Guido

How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?

I have 2 models:

    public class Person
    {
        public int PersonID { get; set; }
        public string PersonName { get; set; }
    }
    public class Order
    {
        public int OrderID { get; set; }
        public int TotalSum { get; set; }
    }

I want edit objects of BOTH classes in SINGLE view, so I need something like:

    @model _try2models.Models.Person
    @model _try2models.Models.Order
    
    @using(Html.BeginForm())
    {
        @Html.EditorFor(x =&gt; x.PersonID)
        @Html.EditorFor(x =&gt; x.PersonName)
        @Html.EditorFor(x=&gt;x.OrderID)
        @Html.EditorFor(x =&gt; x.TotalSum)
    }
This, of course, don&#39;t work: Only one &#39;model&#39; statement is allowed in a .cshtml file. May be there is some workaround?

Two models in one view in ASP MVC 3

I need to specialize template member function for some type (let&#39;s say **double**). It works fine while class `X` itself is not a template class, but when I make it template GCC starts giving compile-time errors.

    #include &lt;iostream&gt;
    #include &lt;cmath&gt;
    
    template &lt;class C&gt; class X
    {
    public:
       template &lt;class T&gt; void get_as();
    };
    
    template &lt;class C&gt;
    void X&lt;C&gt;::get_as&lt;double&gt;()
    {
    
    }
    
    int main()
    {
       X&lt;int&gt; x;
       x.get_as();
    }

here is the error message

    source.cpp:11:27: error: template-id
      &#39;get_as&lt;double&gt;&#39; in declaration of primary template
    source.cpp:11:6: error: prototype for
      &#39;void X&lt;C&gt;::get_as()&#39; does not match any in class &#39;X&lt;C&gt;&#39;
    source.cpp:7:35: error: candidate is:
      template&lt;class C&gt; template&lt;class T&gt; void X::get_as()

How can I fix that and what is the problem here?

Thanks in advance.

explicit specialization of template class member function

I understand that non-type template parameters should be a constant integral expression. Can someone shed light why this is so?

    template &lt;std::string temp&gt;
    void foo()
    {
         // ...
    }

&gt;     error C2993: &#39;std::string&#39; : illegal type for non-type template parameter &#39;temp&#39;.

I understand what a constant integral expression is. What are the reasons for not allowing non-constant types like `std::string` as in the above snippet ?

Non-type template parameters

Let&#39;s say I saved a snipplet of a footer. How do I &quot;include&quot; that in my current template?

In EJS template engine, how do I &quot;include&quot; a footer?

In short, all I need is to make my WordPress do this

    $var = get_template_part( &#39;loop&#39;, &#39;index&#39; ); 

but, `get_template_part()` does not return HTML, it prints it. &lt;br /&gt;I need this HTML stored in `$var` - do you have any ideas how to do it? 

WordPress: save `get_template_part()` to variable

Can lambda expressions be used *as* class template parameters?  (Note this is a very different question than [this one][1], which asks if a lambda expression itself can be templated.)

I&#39;m asking if you can do something like:

    template &lt;class Functor&gt; 
    struct Foo { };
    // ...
    Foo&lt;decltype([]()-&gt;void { })&gt; foo;

This would be useful in cases where, for example, a class template has various parameters like `equal_to` or something, which are usually implemented as one-liner functors.  For example, suppose I want to instantiate a hash table which uses my own custom equality comparison function.  I&#39;d like to be able to say something like:

    typedef std::unordered_map&lt;
      std::string,
      std::string,
      std::hash&lt;std::string&gt;,
      decltype([](const std::string&amp; s1, const std::string&amp; s2)-&gt;bool 
        { /* Custom implementation of equal_to */ })
      &gt; map_type;

But I tested this on GCC 4.4 and 4.6, and it doesn&#39;t work, apparently because the anonymous type created by a lambda expression doesn&#39;t have a default constructor.  (I recall a similar issue with `boost::bind`.)  Is there some reason the draft standard doesn&#39;t allow this, or am I wrong and it is allowed but GCC is just behind in their implementation?

  [1]: https://stackoverflow.com/questions/4124579/c0x-lambdas-with-template-parameters-closed



Content Type	Original Author	Original Content on Stackoverflow
Question	Vilx-	View Question on Stackoverflow
Solution 1 - asp.net Mvc-3	Gerard	View Answer on Stackoverflow

How to create custom editor/display templates in ASP.NET MVC 3?

asp.net Mvc-3 Problem Overview

asp.net Mvc-3 Solutions

Solution 1 - asp.net Mvc-3

How can I find MAX with relational algebra?

Java: is there no AtomicFloat or AtomicDouble?

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