How do I use Razor values in a javascript function? [duplicate]

Answer 1

Sure, just make sure to properly encode it. For example you could JSON encode the entire model itself:

@model IEnumerable<MyViewModel>
<script type="text/javascript">
    var model = @Html.Raw(Json.Encode(Model));
    // at this stage the model javascript variable represents the JSON encoded
    // value of your server side model so that you can access all it's properties:
    alert(model.length);
</script>

or:

alert(model[2].Foo.Bar);

or whatever.

But if you only care about the number of elements inside the model (if this model represents a collection):

var count = @Html.Raw(Json.Encode(Model.Count()));
alert(count);

Answer 2

Make sure this is in a Razor file:

<script> var myValue = @Model.myRecord.Count();</script>

If it is in just a js file, the Razor engine won't run that code at all.