Multiple word Auttosuggest using Lucene.Net
- by eric
I am currently working on an search application which uses Lucene.Net to index the data from the database to Index file. I have a product catalog which has Name, short and long description, sku and other fields. The data is stored in Index using StandardAnalyzer. I am trying to add auto suggestion for a text field and using TermEnum to get all the keyword terms and its score from the Index. But the terms returned are of single term. For example, if I type for co, the suggestion returned are costume, count, collection, cowboy, combination etc. But I want the suggestion to return phrases. For exmaple, if I search for co, the suggestions should be cowboy costume, costume for adults, combination locks etc.
The following is the code used to get the suggestions:
public string[] GetKeywords(string strSearchExp)
{
IndexReader rd = IndexReader.Open(mIndexLoc);
TermEnum tenum = rd.Terms(new Term("Name", strSearchExp));
string[] strResult = new string[10];
int i = 0;
Dictionary<string, double> KeywordList = new Dictionary<string, double>();
do
{
//terms = tenum.Term();
if (tenum.Term() != null)
{
//strResult[i] = terms.text.ToString();
KeywordList.Add(tenum.Term().text.ToString(), tenum.DocFreq());
}
} while (tenum.Next() && tenum.Term().text.StartsWith(strSearchExp) && tenum.Term().text.Length > 1);
var sortedDict = (from entry in KeywordList orderby entry.Value descending select entry);
foreach (KeyValuePair<string, double> data in sortedDict)
{
if (data.Key.Length > 1)
{
strResult[i] = data.Key;
i++;
}
if (i >= 10) //Exit the for Loop if the count exceeds 10
break;
}
tenum.Close();
rd.Close();
return strResult;
}
Can anyone please give me directions to achive this? Thanks for looking into this.
