Issue
One of the issues I came across search was the problem with multilingual taxonomy.
When I was searching for a document with a certain taxonomy term I could find the document in the default language but not in a other language.
Explanation
If you use taxonomy on an item or document it will save the taxonomy like this => 1;#”Default label”|Taxonomy Guid.
Example: I create an item and choose the taxonomy value “Monday” it will be saved like this => 1;”Monday”|D5BAD544-9A7E-4936-AD24-9E75D2E0FC5B
When I switch the language to french and create an item and choose “Lundi” it will be saved like this => 1;”Monday”|D5BAD544-9A7E-4936-AD24-9E75D2E0FC5B
So when we search for “monday” we can find the item we created but when we search for “lundi” we don’t find the item because it isn’t saved with lundi but with “Monday”.
A fix
So a possible fix is to extend the Core results webpart. So when we search for a taxonomy we are searching for the id and not for the name.
Follow these examples if you don’t have multilingual terms or if the terms are not mapped.
- Creating multilingual terms
Creating multilingual terms
- Adding the terms to the mapped properties
Mapping taxonomy to search properties
1) Create a new empty SharePoint project and name it TaxonomySearchResults.
2) Create a new webpart not a visual webpart. Name it TaxonomySearchResultsWebPart.
3)Add the assembly Microsoft.SharePoint.Search found in the ISAPI map => C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\ISAPI
4) inherit from the CoreResultsWebPart.
public class TaxonomySearchResultsWebPart : CoreResultsWebPart
{
5) Extend the init class
public TaxonomySearchResultsWebPart()
: base() { }
6) Override the onload method
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
//base.xmlResponseDoc has to be null or else the query is already excuted
if (base.xmlResponseDoc == null)
{
SetAdditionalQueryTerm();
}
}
7) Create the method SetAdditionalQueryTerm
private void SetAdditionalQueryTerm()
{
try
{
//get the queryObject
object queryObject = HttpContext.Current.Items["WSSSRHDC_0"];
Type valType = queryObject.GetType();
//get the full text query
PropertyInfo fullTextQueryProp = valType.GetProperty("FullTextQuery", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
//get the query
string query = (string)fullTextQueryProp.GetValue(queryObject, null);
if (string.IsNullOrEmpty(query))
{
// get the keywords that the query is searching for
PropertyInfo keywordQueryProp = valType.GetProperty("KeywordQuery", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
//get the query with the keywords
query = (String)keywordQueryProp.GetValue(queryObject, null);
//create the new query
string newQuery = SetQuery(query);
//set the new query
keywordQueryProp.SetValue(queryObject, newQuery, null);
}
}
catch (Exception ex)
{
}
}
8) Create the method SetQuery
private string SetQuery(string query)
{
//split the search keywords
string[] words = query.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
//string oldword = string.Empty;
string id = string.Empty;
//the new query that's going to be send back
string newQuery = query;
//loop each word to get the id of the taxonomy term
foreach (string word in words)
{
id = GetTermId(word);
newQuery.Replace(word, id);
}
return newQuery;
}
9) Create the method GetTermID
private string GetTermId(string termName, string groupName)
{
string result = termName;
//create the taxonomy session
TaxonomySession session = new TaxonomySession(SPContext.Current.Site, false);
//search the taxonomy term based on the language that sharepoint is currently in
var terms = session.GetTermsInWorkingLocale(termName, false, StringMatchOption.ExactMatch, 1, true, true);
//send the first term we found back
if (terms.Count > 0)
{
result = terms[0].Id.ToString();
}
//if no term was found send back the original name
return result;
}
10) Deploy this solution and add the webpart to the search result page of SharePoint
Later this week the webpart can be downloaded at my companies codeplex site: Ventigrate codeplex