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POCorrect way to post dates to Web API?
 

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    <p>I am reading data from Web API and populate a form. When I submit it back to Web API, I get this error:</p> <blockquote> <p>{"Message":"An error has occurred.","ExceptionMessage":"Property 'StartDate' on type 'MvcApplication1.Models.ProductSale' is invalid. Value-typed properties marked as [Required] must also be marked with [DataMember(IsRequired=true)] to be recognized as required. Consider attributing the declaring type with [DataContract] and the property with [DataMember(IsRequired=true)].","ExceptionType":"System.InvalidOperationException","StackTrace":" at System.Web.Http.Validation.Validators.ErrorModelValidator.Validate(ModelMetadata metadata, Object container)\r\n at System.Web.Http.Validation.DefaultBodyModelValidator.ShallowValidate(ModelMetadata metadata, ValidationContext validationContext, Object container)\r\n<br> at System.Web.Http.Validation.DefaultBodyModelValidator.ValidateProperties(ModelMetadata metadata, ValidationContext validationContext)\r\n at System.Web.Http.Validation.DefaultBodyModelValidator.ValidateNodeAndChildren(ModelMetadata metadata, ValidationContext validationContext, Object container)\r\n<br> at System.Web.Http.ModelBinding.FormatterParameterBinding.&lt;>c_<em>DisplayClass1.b</em>_0(Object model)\r\n at System.Threading.Tasks.TaskHelpersExtensions.&lt;>c_<em>DisplayClass49.b</em>_48()\r\n at System.Threading.Tasks.TaskHelpers.RunSynchronously[TResult](Func`1 func, CancellationToken cancellationToken)"} 1</p> </blockquote> <p>My date comes Web API as "2013-01-31T16:27:18.503" and posts back as "2013-01-31T05:00:00.000Z". I can intercept the payload before sending to Web API and can use something like <a href="http://momentjs.com" rel="nofollow">http://momentjs.com</a> to parse it, but what should I do? This is driving me nuts!</p>
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    1. USTruMan1
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    1. COIf you're looking for a solution - try applying [DataContract] attribute at the class level as well as [DataMember(IsRequired=true)] on the property. See also these two questions: http://stackoverflow.com/questions/12234582/mvc4-rtm-validation-throwing-an-error, http://stackoverflow.com/questions/14079049/asp-net-web-api-validation-datacontract-and-datamember-required
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      1. USJoanna Derks
 

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