Neo4JClient: Parameter in Match() clause - neo4j

Question

I'm trying to create a generic repository. For some reason, having a parameter in the Match() clause does not seems to work. Anyone know what the problem might be? My code looks like this (I'm a C#/.net Developer):
private IEnumerable<T> GetNodCollectionByLabel<T>(string nodLabel)
{
IEnumerable<T> entityList = new List<T>();
entityList = _graphClient.Cypher
.Match("(entity:{nodLabel})")
.WithParam("nodLabel", nodLabel)
.Return(entity => entity.As<T>())
.Results;
return entityList.ToArray();
}
The exception is:
SyntaxException: Invalid input '{': expected whitespace or a label name (line 1, column 15 (offset: 14)) "MATCH (entity:{nodLabel})" ^

Answer 1

.withParam() is for the Cypher parameters as they meant, not for the labels.
http://neo4j.com/docs/stable/cypher-parameters.html
You cannot use parameters for labels.
One approach for you is to use String.Format();
private IList<string> GetAllLabels()
{
return _graphClient.Cypher
.Match("(n)")
.Return<List<string>>("DISTINCT labels(n)")
.Results;
}
private bool isValidNode(string name)
{
return GetAllLabels().Contains(name.Trim());
}
private IEnumerable<T> GetNodCollectionByLabel<T>(string nodLabel)
{
IEnumerable<T> entityList = new List<T>();
if (!isValidNodeLabel(nodLabel))
{
return Enumerable.Empty<T>();
}
var statement = String.Format("(entity:{0})", nodLabel);
entityList = _graphClient.Cypher
.Match(statement)
.Return(entity => entity.As<T>())
.Results;
return entityList.ToArray();
}

Answer 2

Try this:
private IEnumerable<T> GetNodCollectionByLabel<T>(string nodLabel)
{
IEnumerable<T> entityList = new List<T>();
entityList = _graphClient.Cypher
.Match("(entity:nodLabel)")
.WithParam("nodLabel", nodLabel)
.Return(entity => entity.As<T>())
.Results;
return entityList.ToArray();
}
If you really have a param named "nodLabel" it will return some data.
The problem here was that you were looking for a node like this:
MATCH (entity:{nodLabel}) ...
but you have to specify the node label if you are using :, so you got a parsing error, because you did not specified a label for the node you were matching.