TaxonomyWebTaggingControl “The data entered was not valid” on PostBack

Question

I get the following error on my TaxonomyWebTaggingControl on postback: The data entered was not valid. I have copy the setting for my control in the following example: http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.taxonomy.taxonomywebtaggingcontrol.aspx

anyone knows why?

Answer 1

We need to reset the below properties on Page Postback

• SSPList - This property parses your string and builds a List to setSspId property
• GroupId - A Guid
• TermSetList - This property parses your string and builds a List to set the TermSetId property

Refer below code

//Create taxonomy Session, term store, term set & group to pull metadata from Term Store Management

    TaxonomySession _TaxonomySession = new TaxonomySession(SPContext.Current.Site);
    TermStore _TermStore = _TaxonomySession.TermStores["Managed Metadata Service"];
    Group _Group = _TermStore.Groups["System"];
    TermSet _TermSet = _Group.TermSets["Keywords"];

//Assign the Term Store & Term Set to Taxonomy Control which helps to provide suggestions or pick metadata while you type in run time.

_TaxonomyWebTaggingControl.SspId.Add(_TermStore.Id);
_TaxonomyWebTaggingControl.TermSetId.Add(_TermSet.Id); 

Hopes this helps

Answer 2

The WebTaggingControl will return false if the term entered is invalid or duplicate enties of the term exist. The example you're pointing to doesn't allow to fill in new terms, so you have to enter a term that already exist in the termset/group you're pointing to.