c# - Cypher Query Issue for Counting Nodes? -

hi there peform following cypher query counts how many nodes specified node has relationship , pass in nodename in example.

here query:

start n=node:nameindex(name = "mike") match (n)-->(x) return n, count(*) 

here attempt:

public ienumerable<versionnode> graphnodecount(string nodename)         {             graphquerylogger.trace("now entering graphnodecount(string nodename) method");              ienumerable<versionnode> queryresult = null;              clientconnection = graphoperations.graphgetconnection();                   var query = clientconnection                     .cypher                     .start(new cypherstartbitwithnodeindexlookup("n", "nameindex", "name", nodename))                     .match("n", "-->", "x")                     .return<versionnode>("n, count(*)");                 queryresult = query.results.tolist();                return queryresult;         } 

here main method:

    graphquery graphquery = new graphquery();     var query = graphquery.graphnodecount("mike");     foreach (var item in query)     {         console.writeline(item.name);     } 

here stacktrace:

at system.threading.tasks.task.waitall(task[] tasks, int32 millisecondstimeout, cancellationtoken cancellationtoken)    @ system.threading.tasks.task.waitall(task[] tasks, int32 millisecondstimeout)    @ system.threading.tasks.task.waitall(task[] tasks)    @ neo4jclient.graphclient.neo4jclient.irawgraphclient.executegetcypherresults[tresult](cypherquery query)    @ neo4jclient.cypher.cypherfluentquery`1.get_results()    @ contentmanager_test.contentmanager_library.level_1_api.graph.query.graphquery.graphnodecount(string nodename) 

i nullreferenceexception unhandled object reference not set instance of object. missing?

i think you're running old version of neo4jclient. think because a) don't have pdbs , b) it's not blowing nice error why can't use commands in return calls that.

1. please update neo4jclient
2. if still crashes, post new stack trace https://bitbucket.org/readify/neo4jclient/issues/new can track , fix bug

these days, query should this:

var queryresults = clientconnection     .cypher     .start(new {         n = node.byindexlookup("nameindex", "name", nodename)     })     .match("n-->x")     .return(n => new {         foo = n.as<versionnode>(),         countofallnodes = all.count()     })     .results     .tolist();  

(note: i've typed out hand in textbox here, haven't tested it, should correct.)