Data Annotations - Set Requiered to true for FirstName if Type = Standard

Question

User749469198 posted

Hi,

i have a property FirstName in metadata class. I only want to set the "Required" Attributte to true if i select "Standard" in my Dropdownlist-Type - else not required.

Can i achieve this in on FirstNameChanging or FirstNameChanged. Can someone point me in the right direction.

Thanks

Answer 1

User3866881 posted

FirstNameChanging

Please do this event on FirstNameChanging to check your SelectedValue.

And it would be better if you can define a customized Attribute to entitle which property you wanna do validation:

http://msdn.microsoft.com/en-us/library/cc668224(v=VS.100).aspx

Answer 2

User1492915735 posted

orimaspnet

Responsiveness web app? If yes, Isn't the logic belong to client? Should not employing the javascript?

Supporting Validation on the Client

ASP.NET MVC supports client-side validation of data by sharing validation information from the server. This is done by implementing the IClientValidatable interface on your custom validation classes. IClientValidatable contains only the GetClientValidationRules method that returns a ModelClientValidationRule collection.