Razor Syntax and Javascript

You need to wrap it in the pseudo element <text>. This will switch the parser back to html mode and it will then parse the javascript as part of the html and not c#. The reason it happens is the @for() is a c# block and anything treated within is also considered c# until it’s escaped by an html tag. Since you probably don’t want an html tag razor provides the <text> tag to switch modes.

If you notice the difference in your asp.net webforms you end the <% for line with a %> which takes it out of c# mode. If you download the razor highlighter extension for visual studio 2010 it will help you see when code is treated as code and html is treated as html.

<script type="text/javascript">
    var jqGridIdList = "@Url.Action("getidlist", "office", new { area = "reports" })";

    var availableIds = [];
    @for(var i = 0; i < Model.Data.Count (); i++) {
        <text>availableIds.push({ value : "@Model.Data.ElementAt(i).Text", label : "@Model.Data.ElementAt(i).Text" });</text>
    }
</script>

Update for latest version

You can now use the @: syntax for even more readability

<script type="text/javascript">
    var jqGridIdList = "@Url.Action("getidlist", "office", new { area = "reports" })";

    var availableIds = [];
    @for(var i = 0; i < Model.Data.Count (); i++) {
        @:availableIds.push({ value : "@Model.Data.ElementAt(i).Text", label : "@Model.Data.ElementAt(i).Text" });
    }
</script>