You could use underscore (`_`) and the helper is intelligent enough to do the rest:

    @Html.TextBoxFor(
        model =&gt; model.Country.CountryName, 
        new { data_url = Url.Action(&quot;CountryContains&quot;, &quot;Geo&quot;) }
    )

And for those who want to achieve the same in pre ASP.NET MVC 3 versions they could:

    &lt;%= Html.TextBoxFor(
        model =&gt; model.Country.CountryName, 
        new Dictionary&lt;string, object&gt; { 
            { &quot;data-url&quot;, Url.Action(&quot;CountryContains&quot;, &quot;Geo&quot;) } 
        }
    ) %&gt;

I have one activity which is the main activity used throughout the app and it has a number of variables. I have two other activities which I would like to be able to use the data from the first activity.
Now I know I can do something like this:

&lt;!-- language: lang-java --&gt;

    GlobalState gs = (GlobalState) getApplication();
    String s = gs.getTestMe();

However I want to share a lot of variables and some might be rather large so I don&#39;t want to be creating copies of them like above.

Is there a way to directly get and change the variables without using get and set methods? I remember reading an article on the Google dev site saying this is not recommended for performance on Android.

What&#39;s the best way to share data between activities?

How do you define Global variables in Java  ? 

Global variables in Java

How do I add `data-*` html attributes using TextboxFor?

This is what I currently have:

    @Html.TextBoxFor(model =&gt; model.Country.CountryName, new { data-url= Url.Action(&quot;CountryContains&quot;, &quot;Geo&quot;) })

As you see, the `-` is causing a problem here `data-url`. Whats the way around this?

Html5 data-* with asp.net mvc TextboxFor html attributes

How do I add <code>data-*</code> html attributes using TextboxFor?
This is what I currently have:
<pre><code class="hljs language-python">@Html.TextBoxFor(model => model.Country.CountryName, new { data-url= Url.Action("CountryContains", "Geo") })
</code></pre>
As you see, the <code>-</code> is causing a problem here <code>data-url</code>. Whats the way around this?

Using a FileStreamResult in ASP.NET MVC 3, I get a response header like

    X-SourceFiles =?UTF-8?B?RDpcUHJvamVjdFxqYWNvYlx0ZXN0?=

Anyone knows what this header means, and what&#39;s its purpose?

What does the X-SourceFiles header do?

I am creating a form which updates two related models, for this example a Project with a collection of Tasks, I want the controller to accept a single Project which has its Task collection loaded from the form input. I have this working, essentially the below code without a partial.

This might sound silly but I cannot figure out how to access the counter (i) from the partial?

Model

	public class Project
	{
		public string Name { get; set; }
		public List&lt;Task&gt; Tasks { get; set; }
	}

	public class Task
	{
		public string Name { get; set; }
		public DateTime DueDate { get; set; }
	}

Create.cshtml (View)

	@model MyWebApp.Models.Project

	@using(Html.BeginForm(&quot;Create&quot;, &quot;Project&quot;, FormMethod.Post, new { id = &quot;project-form&quot; }))
	{
		&lt;div&gt;
			@Html.TextBox(&quot;Name&quot;, Model.Name)
		&lt;/div&gt;
		
		@for(int i = 0; i &lt; Model.Tasks.Count; i++)
		{
			@Html.Partial(&quot;_TaskForm&quot;, Model.Tasks[i], new ViewDataDictionary&lt;int&gt;(i))
		}
		
	}

_TaskForm.cshtml (partial view)

	@model MyWebApp.Models.Task

	&lt;div&gt;
		@Html.TextBox(String.Format(&quot;Tasks[{0}].Name&quot;, 0), Model.Name)
	&lt;/div
	&lt;div&gt;
		@Html.TextBox(String.Format(&quot;Tasks[{0}].DueDate&quot;, 0), Model.DueDate)
	&lt;/div


NOTE the String.Format above I am hardcoding 0, I want to use the ViewDataDictionary parameter which is bound to the variable i from the calling View


asp mvc partial with model and ViewDataDictionary - how do I access the ViewDataDictionary?

I want to redirect the Index action of the Home controller to another controller&#39;s action and nothing else. My code is thus:

        public void Index()
        {
            //All we want to do is redirect to the class selection page
            RedirectToAction(&quot;SelectClasses&quot;, &quot;Registration&quot;);
        }

Right now, this just loads a 0 kB blank page and does nothing. I have a feeling it has something to do with that void return type, but I don&#39;t know what else to change it to. What&#39;s the issue here?

ASP.NET MVC 3 - redirect to another action

I&#39;m working with MVC3, and using Entity Framework 4.0 Entities as my model.  So far, everything works great as far as using it as a model (all the crud operations/page generations work out of the box).  I&#39;m wondering, though, how do you get the same robust labels and validation information as when you generate a model manually?

Here&#39;s an example of what I mean. This is a class generated by the sample MVC3 project:

    public class LogOnModel
    {
        [Required]
        [Display(Name = &quot;User name&quot;)]
        public string UserName { get; set; }

        [Required]
        [DataType(DataType.Password)]
        [Display(Name = &quot;Password&quot;)]
        public string Password { get; set; }

        [Display(Name = &quot;Remember me?&quot;)]
        public bool RememberMe { get; set; }
    }

With the example above, you can specify what gets rendered in a label for the field (Display), and what type of field to use (Password).  However, when I try to use the entity framework and push it to the view below, I see the automatically generated labels are just the field names, and not anything I want the user to see/have to read:


    @using (Html.BeginForm()) {
        @Html.ValidationSummary(true)
        &lt;fieldset&gt;
            &lt;legend&gt;Person&lt;/legend&gt;
    
            &lt;div class=&quot;editor-label&quot;&gt;
                @Html.LabelFor(model =&gt; model.FirstName)
            &lt;/div&gt;
            &lt;div class=&quot;editor-field&quot;&gt;
                @Html.EditorFor(model =&gt; model.FirstName)
                @Html.ValidationMessageFor(model =&gt; model.FirstName)
            &lt;/div&gt;
    
            &lt;div class=&quot;editor-label&quot;&gt;
                @Html.LabelFor(model =&gt; model.MiddleName)
            &lt;/div&gt;
            &lt;div class=&quot;editor-field&quot;&gt;
                @Html.EditorFor(model =&gt; model.MiddleName)
                @Html.ValidationMessageFor(model =&gt; model.MiddleName)
            &lt;/div&gt;
    
            &lt;div class=&quot;editor-label&quot;&gt;
                @Html.LabelFor(model =&gt; model.LastName)
            &lt;/div&gt;
            &lt;div class=&quot;editor-field&quot;&gt;
                @Html.EditorFor(model =&gt; model.LastName)
                @Html.ValidationMessageFor(model =&gt; model.LastName)
            &lt;/div&gt;
    
            &lt;div class=&quot;editor-label&quot;&gt;
                @Html.LabelFor(model =&gt; model.Birthdate)
            &lt;/div&gt;
            &lt;div class=&quot;editor-field&quot;&gt;
                @Html.EditorFor(model =&gt; model.Birthdate)
                @Html.ValidationMessageFor(model =&gt; model.Birthdate)
            &lt;/div&gt;
    
            &lt;p&gt;
                &lt;input type=&quot;submit&quot; value=&quot;Create&quot; /&gt;
            &lt;/p&gt;
        &lt;/fieldset&gt;}

![enter image description here][1]


**My question is:** How do I add these extra decorations to the entities that are generated using EF4?  Is there something besides System.ComponentModel.DataAnnotations that I should be using? I know entities get regenerated and it&#39;s probably not a good idea to add this to entities&#39; code directly, but for some reason I can&#39;t think of a better approach than manually entering the label text in the view (lame, there&#39;s no reason to have to do that, this is MVC!).  I want to keep it so that the application is dynamic enough to be able to have the correct display information for my model come through and keep an MVC approach.  How do I do it?


  [1]: http://i.stack.imgur.com/N6ZbE.png

Using System.ComponentModel.DataAnnotations with Entity Framework 4.0

I have the following controller action:

    [ChildActionOnly]
    public virtual PartialViewResult ListActions(int id)
    {
        var actions = meetingActionRepository.GetAllMeetingActions(id);
            
        return PartialView(actions);
    }

And the following action link (using t4MVC and the razor syntax)

    &lt;p&gt;
       @Html.RenderAction(MVC.MeetingActions.ListActions(Model.MeetingId))
    &lt;/p&gt;


However this gives me the error:

&gt;cannot implicitly convert type void to object

As far as i can tell the controller action is ok, so what could be giving me this error?





    

cannot implicitly convert type void to object. .NET MVC PartialViewResult

This question is related to Cross-Origin Resource Sharing (CORS, http://www.w3.org/TR/cors/).  

If there is an error when making a CORS request, Chrome (and AFAIK other browsers as well) logs an error to the error console.  An example message may look like this: 

&gt; XMLHttpRequest cannot load `http://domain2.example`. Origin `http://domain1.example` is not allowed by Access-Control-Allow-Origin.

I&#39;m wondering if there&#39;s a way to programmatically get this error message?  I&#39;ve tried wrapping my `xhr.send()` call in try/catch, I&#39;ve also tried adding an `onerror()` event handler.  Neither of which receives the error message.

Is it possible to trap CORS errors?

I am creating an extension that will download a mp3 file off a website. I am trying to do this by creating a new tab with the link to the mp3 file, but chrome keeps opening it inside the player instead of downloading it. Is there any way I can create a pop-up to ask the user to &quot;save-as&quot; the file?

Making a Chrome Extension download a file

    &lt;input type=&quot;file&quot; id=&quot;file-id&quot; name=&quot;file_name&quot; onchange=&quot;theimage();&quot;&gt;
This is my upload button.

    &lt;input type=&quot;text&quot; name=&quot;file_path&quot; id=&quot;file-path&quot;&gt;
This is the text field where I have to show the full path of the file.

    function theimage(){
     var filename = document.getElementById(&#39;file-id&#39;).value;
     document.getElementById(&#39;file-path&#39;).value = filename;
     alert(filename);
    }

This is the JavaScript which solve my problem. But in the alert value gives me 

    C:\fakepath\test.csv 
and Mozilla gives me:

    test.csv

But I want the local *fully qualified file path*. How to resolve this issue?

If this is due to browser security issue then what should be the alternate way to do this?

How to resolve the C:\fakepath?

I&#39;m looking at dynamically setting the ID attribute of HTML Input elements which are created dynamically in my application.

My implementation works fine with the setAttribute method in Firefox. Any ideas or solutions on a working implementation in IE would be appreciated.  


     var hiddenInput = document.createElement(&quot;input&quot;);
        hiddenInput.setAttribute(&quot;id&quot;, &quot;uniqueIdentifier&quot;);
        hiddenInput.setAttribute(&quot;type&quot;, &quot;hidden&quot;);                     
        hiddenInput.setAttribute(&quot;value&quot;, ID);
        hiddenInput.setAttribute(&quot;class&quot;, &quot;ListItem&quot;);




I modified some sample code from blogs relating to this problem that suggest the following workround. Again the Firefox bit works well but the IE bit doens&#39;t


    var hiddenInput = null;

    try { 
    hiddenInput  = document.createElement(&#39;&lt;input name=\&#39;&#39;+&quot;hiddenInputName&quot;+&#39;\&#39;   /&gt;&#39;);
                        hiddenInput.id = &quot;uniqueIdentifier&quot;;
                        //alert(document.getElementById(&quot;uniqueIdentifier&quot;)); 
                       hiddenInput.type = &quot;hidden&quot;;
                    } catch (e) { }            
                    if (!hiddenInput || !hiddenInput.name) { // Not in IE, then
                         var hiddenInput = document.createElement(&quot;input&quot;);
        hiddenInput.setAttribute(&quot;id&quot;, &quot;uniqueIdentifier&quot;);
        hiddenInput.setAttribute(&quot;type&quot;, &quot;hidden&quot;);                     
                    
                }

   

Cheers.



setting the id attribute of an input element dynamically in IE: alternative for setAttribute method

I am curious if anyone has any information about the scalability of HTML WebSockets. For everything I&#39;ve read it appears that every client will maintain an open line of communication with the server. I&#39;m just wondering how that scales and how many open WebSocket connections a server can handle. Maybe leaving those connections open isn&#39;t a problem in reality, but it feels like it is.

Do HTML WebSockets maintain an open connection for each client? Does this scale?

Using MVC 3 with Razor view engine.
I have this View:

    @model dynamic
    @{
        var products = (List&lt;ListItemBaseModel&gt;)Model.Products;
        var threshold = (int)(Model.Threshold ?? 1);
        var id = Guid.NewGuid().ToString();
    }

It is called from another view using this code:

    @Html.Partial(&quot;PartialViewName&quot;, new { Products = Model, Threshold = 5 })

In both Views, when i debug them and watch Model, it seems to contain the correct object. 
When i execute the code i get an error on the &quot;var products =&quot; line saying:

&#39;object&#39; does not contain a definition for &#39;Products&#39;

Can anyone explain to me why i get that error?
Again, when i watch the Model object in debugging mode it looks all right (having 2 properties: Products and Threshold)


MVC Razor dynamic model, &#39;object&#39; does not contain definition for &#39;PropertyName&#39;

How can I create a checkboxList in asp.net MVC and then to handle the event with the checkboxList

CheckboxList in MVC3.0

I just started a new MVC 3 project. Can anyone tell me what 

    &lt;add key=&quot;webpages:Enabled&quot; value=&quot;false&quot; /&gt;

in my web.config file does?


what is the function of webpages:Enabled in MVC 3 web.config

What is the best way to replace links with images using Razor in MVC3.  I simply doing this at the moment:

    &lt;a href=&quot;@Url.Action(&quot;Edit&quot;, new { id=MyId })&quot;&gt;&lt;img src=&quot;../../Content/Images/Image.bmp&quot;, alt=&quot;Edit&quot; /&gt;&lt;/a&gt; 

Is there a better way?

Content Type	Original Author	Original Content on Stackoverflow
Question	Shawn Mclean	View Question on Stackoverflow
Solution 1 - asp.net Mvc	Darin Dimitrov	View Answer on Stackoverflow

Html5 data-* with asp.net mvc TextboxFor html attributes

asp.net Mvc Problem Overview

asp.net Mvc Solutions

Solution 1 - asp.net Mvc

Global variables in Java

What's the best way to share data between activities?

Attributions