StackOverflow in List(Of T)

Question

I have a program that uses Lucene.net in ASP.NET (VB.NET), when you search a term, results are stored in the Lucene.net data structure "hits".

I want to read out the hits into an data structure and work with them, after that I display them in a DataGrid.

By searching a term with a lot of results, often (but not always) there is an error by following code :

For i = 0 To results - 1 Step 1
    Try
        Dim tmpobj As New object_hit(( _
            hits.Doc(i).Get("title") + _
            hits.Doc(i).Get("doc_typ")), _
            hits.Doc(i).Get("pfad"), _
            hits.Doc(i).Get("last_change"), _
            hits.Doc(i).Get("doc_typ"), _
            CStr(hits.Score(i)))    
        list_of_results.Add(tmpobj) 'works'
    Catch
        meldung.Text = "Stackoverflow- zuviele Ergebnisse "
        myexception = True
    End Try

I checked the server; it's a dwh server and has no problems to execute the program.

At first I used a ReDim Array, but now I use a List(Of T). I heard that should solve the problem, but it doesn't - now I'm very confused and don't know what to do- can someone help me please?

Answer 1

Change the Catch block so that you actually can see what is happening here:

Catch ex as Exception
    meldung.Text = ex.Message ' or ex.ToString() to see full details '
    throw
End Try

You are probably not getting a StackOverflowException here.

Answer 2

hello, my browser crashed, so i have to write as an guest : < sorry.

i tried that:

Exception of type 'System.OutOfMemoryException' was thrown.

now i have an correct for loop, with only one line of code in it

list_of_results.Add(New object_hit((hits.Doc(i).Get("title") + hits.Doc(i).Get("doc_typ")), hits.Doc(i).Get("pfad"), hits.Doc(i).Get("last_change"), hits.Doc(i).Get("doc_typ"), CStr(hits.Score(i)))) 

so what happened? (the server is an dwh server, it should make it ...)

thanks