MVC :: Dynamic Columns For View At Runtime?

Nov 2, 2010

I finally got the DynamicLibrary issue nailed down I asked about in another post. The basic gist is that there's a project table that renders to a View. The user can, at runtime, choose the columns to display and the order in which they should be displayed. Here's the method that does the work:

[Code]....

This works great. The SerializeToCsv() method is an extension method I created for generic string lists. I used the jQuery UI bundle to create a sortable set of 'ul li' elements with checkboxes in them, which allows users to select which columns to show, and in what order. When the post happens, the current order the elements are in on the View is the order in which they're added to the FormCollection, so I don't need to do anything special to track ordering. So far, all is working according to my evil plans.

The problem I have now is how to render this in the View dynamically at runtime. It's very easy to check for the Model's property values and display them selectively, but not to reorder them. Off the top of my head, I can think of a few ways to do this, but none of them are very attractive. The first idea is to send the Model in as a collection of objects. The query that returns the data as shown above already has the columns returned in the order the user chose, so I could wrap them in objects and render them as string representations in the View. This is clunky, ugly, and won't give me the support for the actual data types boxed in the objects. I'd have to convert them all to strings in the service class and then wrap them in objects, because the View wouldn't know if it was dealing with a DateTime, string, int or whatever. I REALLY don't want to take this route. Can anyone give me some advice on a better way to reorder and selectively display columns at runtime?

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