MVC :: Html.RenderPartial Appears To Be Stripping Model Of Custom Attributes

Aug 27, 2010

I have implemented a custom ModelMetadataProvider so that I can decorate my view models with some custom attributes and everything was working fine until I made use of a Partial View. The following code in my view works fine: -

<%: Html.DisplayFor(x => x.Results) %>

Results is a List which renders a custom display template and is also decorated with a custom attribute. Using breakpoints, after the above line and prior to the code within the custom display template, the overridden CreateMetadata method in my custom ModelMetadataProvider is invoked. If I look at the attributes collection parameter I can see that it does contain my custom attribute thus everything working as expected. However, if I replace the above with the following line of code in my view then it breaks: -

<% Html.RenderPartial("ApplicationSearchResults", Model.Results, new ViewDataDictionary()); %>

All the Partial View contains is: -

<%: Html.DisplayFor(x => x) %>

Again using breakpoints, after the above line and prior to the code within the custom display template, the overridden CreateMetadata method in my custom ModelMetadataProvider is invoked. But this time if I look at the attributes collection parameter my custom attribute is not there.

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