ASP.NET MVC 3 Razor : Initialize a JavaScript array

What would be the prefered way to initialize a JS array in ASP.NET MVC 3 with Razor with a value I have in my model/view model ?

For example to initialize an array of strings representing dates :

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  • <script type="text/javascript">
        var activeDates = ["7-21-2011", "7-22-2011"];


    public class MyViewModel
      public DateTime[] ActiveDates { get; set; }

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  • 2 Solutions collect form web for “ASP.NET MVC 3 Razor : Initialize a JavaScript array”

    I don’t quite understand the relation between JS and ASP.NET MVC 3 Razor. Javascript runs on the client side no matter which technology has been used on the server to generate the page. So on javascript an array is an array.

    There are a couple of possibilities to define arrays of objects in javascript

    var activeDates = [ '7-21-2011', '7-22-2011' ];


    var activeDates = new Array();

    or yet:

    var activeDates = new Array();
    activeArrays[0] = '7-21-2011';
    activeArrays[1] = '7-22-2011';

    At th end all those represent the same array. But it is an array of strings, not dates.

    If you wanted to have an array of dates, here’s what you could do:

    var activeDates = [ 
        new Date(2011, 6, 21, 0, 0, 0, 0), 
        new Date(2011, 6, 22, 0, 0, 0, 0) 

    Now the only relation I can see with your question to ASP.NET MVC is that you probably have some array on your view model:

    public class MyViewModel
        public DateTime[] ActiveDates { get; set; }

    that you wanted to serialize and manipulate in a javascript array. In this case here’s the syntax:

    @model MyViewModel
    <script type="text/javascript">
        var activeDates = @Html.Raw(Json.Encode(Model.ActiveDates));

    Now because of the way DateTime fields are JSON serialized in .NET you will end up with the following in the generated HTML:

    var activeDates = ["\/Date(1309471200000)\/","\/Date(1311199200000)\/"];

    and if you wanted to convert this array of strings into an array of actual javascript dates:

    var dates = $.map(activeDates, function(date, index) {
        date = date.replace('/Date(', '').replace(')/', '');  
        return new Date(parseInt(date));

    I just happen to do this yesterday and came up with this solution (if you want it to look like the output you have in your question – I was using this with jqplot):

    <script type="text/javascript">
        var activeDates = ['@Html.Raw(string.Join("', '", @ActiveDates.Select(f => string.Format("{0:MM-dd-yyyy}", f)).ToArray()))']