ViewData in ASP.NET MVC 3

I have 2 Cotrollers. First one sets the ViewData property like this ViewData["Error"开发者_Python百科] = "something"; I am able display this message on the page. Second Controller loads the grid. When i try to set the ViewData property from that Cotroller, It does not show up on the page.

Do you why? Am I doing anything wrong here?

Please let me know.

Thanks!!!!

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Using two controllers for a single view is a bit of a no-no.

Look into ViewModels to pass all of the required data to your view. You can then create a PartialView for your grid, and pass the necessary model to the Partial View as well. Consider ViewData / ViewBag a last resort when a ViewModel doesn't work.

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Are you trying to use two separate controllers to render the same view? If so you should probably consider, breaking the view logic of your "grid" into a partial view that you in turn render within your primary view.

As you mentioned "ViewData" twice, another item for consideration is the implementation of the ViewModel Pattern. The Viewdata dictionary approach is fast and fairly easy to implement. however, it is not type-safe and errors due to typo's will not be caught at compile time.