HierarchicalTaxonFieldDefinitionElement: null reference exce

Posted by Community Admin on 05-Aug-2018 14:33

HierarchicalTaxonFieldDefinitionElement: null reference exception

Sitefinity - Front- & Back-End Development

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Posted by Community Admin on 17-Feb-2011 00:00

Hello,

I create a new taxonomy in the module installation and I want to display its content using a HierarchicalTaxonFieldDefinitionElement.

Here is the code i'm using:

var taxonomyManager = TaxonomyManager.GetManager();
  
  
            var marketsField = new HierarchicalTaxonFieldDefinitionElement(mainSection.Fields)
            
                ID = "marketsFieldControl",
                DisplayMode = displayMode,
                Title = Res.Get<ContactsResources>().SelectMarkets,
                ResourceClassId = typeof(ContactsResources).Name,
                TaxonomyId = new Guid("9A7FF96D-1D99-4fd9-ADB8-714E1A0F3272"),
                TaxonomyProvider = taxonomyManager.Provider.Name,
                WebServiceUrl = "~/Sitefinity/Services/Taxonomies/HierarchicalTaxon.svc",
                AllowMultipleSelection = true,
                FieldType = typeof(HierarchicalTaxonField),
                WrapperTag = HtmlTextWriterTag.Li
            ;
            marketsField.ValidatorConfig = new ValidatorDefinitionElement(marketsField)
            
                Required = true,
                MessageCssClass = "sfError",
                RequiredViolationMessage = Res.Get<ContactsResources>().YouMustSelectAMarket
            ;
            mainSection.Fields.Add(marketsField);

I got a null reference exception on the last line (mainSection.Fields.Add(marketsField)). marketsField is not null.
I don't know what it happens.

Do you have any idea?

Edit
I solve it, i forgot to declare some attributes...

But i have a problem with my resources class. I got an error "cannot find key "select one or many market" or resources class id ContactsResources". But my key is SelectMarkets.

Jocelyn

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