Question

i just started learning how lucene works and am trying to implement it in a site i allready wrote with mysql.

i have a field named city in my documents, and i want to get all the values for city from the documents.

i have found this question ( which is exactly what i need ) Get all lucene values that have a certain fieldName
but all they show there is a line of code, and as i said, i am not experienced enough to understand how to implement that.

can someone please help me with some code to implement IndexReader.Open(directory,true).Terms(new Term("city", String.Empty));

what comes before / after that declaration ?

i have tried this:

System.IO.DirectoryInfo directoryPath = new System.IO.DirectoryInfo(Server.MapPath("LuceneIndex"));
    Directory directory = FSDirectory.Open(directoryPath);
    Lucene.Net.Index.TermEnum iReader = IndexReader.Open(directory,true).Terms(new Term("city", String.Empty));

but how do i iterate over the results?

Answer 1

This loop should iterate over all the terms:

Term curTerm = iReader.Term();
bool hasNext = true;
while (curTerm != null && hasNext)
{
    //do whatever you need with the current term....
    hasNext = iReader.Next();
    curTerm = iReader.Term();
}