help fix problem when delete note???

[nguyễn thiện khiêm]

when delete node in node4jclient use neo4jclient

1. Create 

 

Guid nodeGuid = Guid.NewGuid();

           System.DateTime dateTime = System.DateTime.Now;

           string timeStamp = String.Format("{0:dd MMMM yyyy HH:mm:ss}", dateTime);

           var createNode =//= this.clientConnection.Create(

               new clsPlaceEntity()

               {

                   GUID = nodeGuid.ToString(),

                   PlaceName = name,

                   PlaceAddpress =addpress ,

                   PlaceDescription = desc,

                   PlaceNumOfView = view,

                   TimeStamp = timeStamp

               };

           clientConnection.Cypher

                   .Create("(place:place {place})")

                   .WithParam("place", createNode)

                   .ExecuteWithoutResults();

2. Delete node, it not deleted?

public void DeleteUser(long userId)

       {

           Connect();

           FindUserById(userId)

               .Delete("place")

               .ExecuteWithoutResults();

       }

       public ICypherFluentQuery FindUserById(long userId)

       {

           return clientConnection.Cypher

               .Match("(place:place)")

               .Where((clsPlaceEntity place) => place.GUID == "e4461dba-c4aa-4beb-8c74-0730aaebc6c3");

           // Nothing has been executed here: we've just built a query object

       }

3. problem???

Object reference not set to an instance of an object.

   at Neo4jClient.Cypher.CypherWhereExpressionVisitor.VisitParameterMember(MemberExpression node) in D:\temp\081c198\Neo4jClient\Cypher\CypherWhereExpressionVisitor.cs:line 238

   at Neo4jClient.Cypher.CypherWhereExpressionVisitor.VisitMember(MemberExpression node) in D:\temp\081c198\Neo4jClient\Cypher\CypherWhereExpressionVisitor.cs:line 184

   at System.Linq.Expressions.MemberExpression.Accept(ExpressionVisitor visitor)

   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)

   at Neo4jClient.Cypher.CypherWhereExpressionVisitor.VisitBinary(BinaryExpression node) in D:\temp\081c198\Neo4jClient\Cypher\CypherWhereExpressionVisitor.cs:line 67

   at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)

   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)

   at System.Linq.Expressions.ExpressionVisitor.VisitLambda[T](Expression`1 node)

   at System.Linq.Expressions.Expression`1.Accept(ExpressionVisitor visitor)

   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)

   at Neo4jClient.Cypher.CypherWhereExpressionBuilder.BuildText(LambdaExpression expression, Func`2 createParameterCallback, CypherCapabilities capabilities, Boolean camelCaseProperties) in D:\temp\081c198\Neo4jClient\Cypher\CypherWhereExpressionBuilder.cs:line 21

   at Neo4jClient.Cypher.CypherFluentQuery.<>c__DisplayClass59_0.<Where>b__0(QueryWriter w) in D:\temp\081c198\Neo4jClient\Cypher\CypherFluentQuery`Where.cs:line 11

   at Neo4jClient.Cypher.CypherFluentQuery.Mutate(Action`1 callback) in D:\temp\081c198\Neo4jClient\Cypher\CypherFluentQuery.cs:line 57

   at Neo4jClient.Cypher.CypherFluentQuery.Where(LambdaExpression expression) in D:\temp\081c198\Neo4jClient\Cypher\CypherFluentQuery`Where.cs:line 10

   at Neo4jClient.Cypher.CypherFluentQuery.Where[T1](Expression`1 expression) in D:\temp\081c198\Neo4jClient\Cypher\CypherFluentQuery`Where.cs:line 34

   at ConsoleApplication1.clsPlaceImp.FindUserById(Int64 userId) in d:\2016\ConsoleApplication1\ConsoleApplication1\clsPlaceImp.cs:line 102

   at ConsoleApplication1.clsPlaceImp.DeleteUser(Int64 userId) in d:\2016\ConsoleApplication1\ConsoleApplication1\clsPlaceImp.cs:line 96

   at ConsoleApplication1.Program.Main(String[] args) in d:\2016\ConsoleApplication1\ConsoleApplication1\Program.cs:line 22