在.js文件中导入名称空间

Question

I am working on an MVC application and all the JavaScript for the pages is in their own JavaScript files, so there are no Script tags on the pages. Now, there is a Messages class that contains Errors, Information and Confirmation classes with Static strings. The error messages and information messages are being returned from the server, which is fine. But the confirmation messages (eg. Do you wish to Save (OK/Cancel), which is the confirm function in JavaScript) are hard coded in each JavaScript file. I now want the JavaScript to use the confirmation messages from the Messages.Confirmation class.

Currently, to solve this I do something like this in my page,

<%@ Import Namespace="Business.Common" %> 

.....

<script type="text/javascript">
    confirmSaveQuestion= '<%= Messages.Confirmations.CONFIRM_SAVE  %>';
</script>

and my .js file looks like this

var confirmSaveQuestion;

function ConfirmSave() {
    var result = window.confirm(confirmSaveQuestion);
    if (result)
        return true;
    else
        return false;
}

and this works fine.

Is it possible to import the namespace Business.Common into the .js file, so that I don't have to set the value for confirmSaveQuestion in my page?

Answer 1

Your .js files are static, so there is no way for them to interact with server code. I'd recommend one of two things:

1) Use an ASHX handler to dynamically build javascript files - this will return your javascript dynamically, so that you can inject it with server stuff. Instead of referencing a .js file in your markup, you would reference your .ashx file.

2) Put the <%= %> tags into your master page - still shows up on the page, but at least you only have to deal with them once.

Answer 2

As I can't import namespace to my .js file, I went with a different solution. I removed the script tags from my page and instead added the following line of code. I guess it probably ends up doing a similar sort of thing, but it looks a bit cleaner.

<% Html.Telerik().ScriptRegistrar().OnDocumentReady("confirmSaveQuestion = '" + Messages.Confirmations.CONFIRM_SAVE + "'"); %>