I have a custom custom sharepoint form which i have created using visual webpart.

I want to have a Metadata field in my custom form.However, i am not able to find it in my ascx file.

Please help.

  • What you mean by have metadata field? You want the taxonomy selector control? – Arsalan Adam Khatri Feb 17 '14 at 7:02

a- Add reference to "Microsoft.SharePoint.Taxonomy" assembly

b- You need to register following Assembly in your Web Part

<%@ Register TagPrefix="Taxonomy" Namespace="Microsoft.SharePoint.Taxonomy" Assembly="Microsoft.SharePoint.Taxonomy, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

c- You can use the control as following

<Taxonomy:TaxonomyWebTaggingControl runat="server" ID="TaxonomyWebTaggingControl1"
   IsDisplayPickerButton="true" <!--this will show the Picker Button near the textbox.-->
   IsMulti="true" <!--this will allow user to select Single or Multiple Terms.-->
   AllowFillIn="true" <!-- Allows user to add new terms.-->
   IsAddTerms="false" <!-- control will try to add unresolved Term objects to the TermSet object -->
   IsIncludePathData="false"> <!-- Includes Full Path of Term (Id of Group, TermSet & Term Itself) -->

d- Now assign control to Managed Metadata.. You can use following code in PageLoad of Web Part:

TaxonomySession taxonomySession = new TaxonomySession(SPContext.Current.Site);
TaxonomyWebTaggingControl1.SspId.Add(taxonomySession.TermStores["Managed Metadata Service"].Id);
TaxonomyWebTaggingControl1.SSPList = taxonomySession.TermStores["Managed Metadata Service"].Id.ToString();
TaxonomyWebTaggingControl1.TermSetId.Add(taxonomySession.TermStores["Managed Metadata Service"].Groups["tGroup"].TermSets["tTermSet"].Id);
TaxonomyWebTaggingControl1.TermSetList = taxonomySession.TermStores["Managed Metadata Service"].Groups["tGroup"].TermSets["tTermSet"].Id.ToString();
  • Use your own Group and Term Sets here

e- Get the values in code behind:

// this will contain the error message if the values are not correct.
string validationMessage;
var valid = TaxonomyWebTaggingControl1.Validate(out validationMessage);

if (valid)
   var values = new TaxonomyFieldValueCollection(string.Empty);
   foreach (TaxonomyFieldValue value in values)
      var wssId = value.WssId; 
      var termGuid = value.TermGuid;
      var termlabel = value.Label
   // display validation error message 

Add Taxonomy Field / TaxonomyWebTaggingControl to the Web part or Application Page
Build Your Own User Interface Components Using The Taxonomy Controls

  • excellent explanation! +1 – Mike Apr 10 '14 at 14:31
  • Good answer! Might be a good idea to add "e", how to get value from control after selection. – George Norberg Apr 14 '15 at 12:38
  • 1
    @GeorgeNorberg added "e" :) – Arsalan Adam Khatri Apr 14 '15 at 13:36
  • Thanks, Nice one! what would lets say, TaxonomyWebTaggingControl1.Text give me? Somthing like (label | guid)? – George Norberg Apr 14 '15 at 14:07
  • 1
    Label/GUID pairs that represent a Term object that is displayed in the control. TaxonomyWebTaggingControl.Text property – Arsalan Adam Khatri Apr 14 '15 at 14:15

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