mvc javascript with DropDownList

Question

So my view receives a model. And I want to, in case the ID property of the model is -1, make the DDL select the default value "[Select]" that is in there.

DDL:

@Html.DropDownListFor(cModel => cModel.QueueMonitorConfigTypeName, Enum.GetValues(typeof(BPM.Website.Models.PathType)).Cast<BPM.Website.Models.PathType>().Select(v => new SelectListItem
    {
        Text = v.ToString(),
        Value = v.ToString()
    }), "[Select]", new { id = "ddlConfigTypeName" })

And the js:

<script type="text/javascript">
    $(function () {
        var model = @Model.QueueMonitorConfigurationsID
        if (model = -1)
        {
            $('#ddlConfigTypeName').select("[Select]")
        }
        else{}
    });
</script>

But for some reason , the intellisense of the js is telling me it is wrong. The problem comes when I try to do a compare in the if. I've tried with '=', '==', '===' and nothing works

It just keep saying syntax error. I guess it has some relation with adding the @Model tag but cant resolve it. Any guesses?

Thanks

EDIT and if I change it with this:

<script type="text/javascript">
    $(function () {
        if (@Model.QueueMonitorConfigurationsIDel == -1)
        {
            $('#ddlConfigTypeName').select("[Select]")
        }
        else{}
    });
</script>

It still says the syntax error is in the ==

proggrock · Accepted Answer · 2013-06-07 13:45:33Z

1

It thinks you're doing an assignment (with just one = ) in this first one

$(function () {
    var model = @Model.QueueMonitorConfigurationsID
    if (model = -1)
    {
        $('#ddlConfigTypeName').select("[Select]")
    }
    else{}
});

I replicated your situation, and this works:

   <script src="../../Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
   <script type="text/javascript">
$(function () {

    var model = @Model.QueueMonitorConfigurationsID;
    if (model == -1){

        alert('got it');
    }
    else{

   alert(model);
  }
});
</script>

If this still doesn't work for you, can you check the value of the variable "model"? what is it returning?

answered Jun 7, 2013 at 13:45

proggrock

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3 Comments

AAlferez Over a year ago

Well, I tried with =, == and it says syntax error. Seems like my intellisense says wrong things because it works. Does your intellisense say syntax error?

proggrock Over a year ago

Yes it does. Right on the last "});". But this is due to the use of "@Model". You can prove it by replacing "@Model.QueueMonitorConfigurationsID" with just a number, the error will go away. Anyway it won't affect your outcome.

AAlferez Over a year ago

Thank you :) so sad that intellisense doesnt read that properly because is confusing

Rob · Accepted Answer · 2013-06-07 12:22:59Z

0

There is a ";" missing in the JS behind var model = @Model.QueueMonitorConfigurationsID
Change if (model = -1) to if (model == -1)

answered Jun 7, 2013 at 12:22

Rob

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1 Comment

Rob Over a year ago

Ignore it, that's a bug in Intellisense. It runs.

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