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Editorial Team
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Asked: 2026-06-10T19:14:47+00:00

What is the best way to bind a dynamically created collection of elements in

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What is the best way to bind a dynamically created collection of elements in an MVC view to a collection in MVC 4. I know previous versions have required that the elements look like this:

<input name="Categories[0].CategoryID" type="hidden" value="123" />
<input name="Categories[0].CategoryName" type="hidden" value="Music" />
<input name="Categories[1].CategoryID" type="hidden" value="456" />
<input name="Categories[1].CategoryName" type="hidden" value="Movies" />

But when you are dynamically adding new elements and removing them, things get out of sequence pretty quickly.

Does MVC 4 add a way to bind to a non-sequential collection?

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1 Answer

  1. Editorial Team

    Non sequential collection indices supported since MVC2 you just need to have a separate hidden field which will hold the index with the name schema: CollectionName.Index:

    E.g:

    <input type="hidden" name="Categories.Index" value="3" />
<input name="Categories[3].CategoryID" type="hidden" value="123" />
<input name="Categories[3].CategoryName" type="hidden" value="Music" />

<input type="hidden" name="Categories.Index" value="1" />
<input name="Categories[1].CategoryID" type="hidden" value="456" />
<input name="Categories[1].CategoryName" type="hidden" value="Movies" />

    You can find more info about the topic here: Model Binding To A List

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