Question

我有以下代码来查询Neo4J图。但是，即使返回所有节点，它们的属性也会在内部类中设置为null。

// Method to retrieve the passed functional family from the graph database
public void FromGraph(string funFam)
{
    // Create a new client and connect to the database
    var client = new GraphClient(new Uri("http://localhost:7474/db/data"), this.dbUsername, this.dbPassword);
    client.Connect();

    // Run the query
    var queryResults = client.Cypher
        .Match("(a:FunFam {name: '" + funFam + "'})-[*]-(b)")
        .Return((a, b) => new
        {
            a = a.As<F>(),
            b = b.As<K>()
        })
        .Results;
    Console.WriteLine(queryResults);


    Console.ReadLine();
}

// An internal class used to hold the FunFam node from the graph database
internal class F
{
    // Private properties
    private string consensus;
    private string name;

    // getters and setters
    public string Consensus { get => consensus; set => consensus = value; }
    public string Name { get => name; set => name = value; }
}

// An internal class used to hold the Kmer node from the graph database
internal class K
{
    // Private properties
    private string sequence;
    private List<string> offsetAt0;
    private List<string> offsetAt1;
    private List<string> offsetAt2;

    // Getters and setters
    public string Sequence { get => sequence; set => sequence = value; }
    public List<string> OffsetAt0 { get => offsetAt0; set => offsetAt0 = value; }
    public List<string> OffsetAt1 { get => offsetAt1; set => offsetAt1 = value; }
    public List<string> OffsetAt2 { get => offsetAt2; set => offsetAt2 = value; }
}

调试器中给出了以下null结果：

Debugger Image

Answer 1

您的属性位于UpperCamelCase中，但数据库中的字段是小写的。 Neo4jClient设置属性，您需要使用JsonProperty属性来装饰它们：

[JsonProperty("name")] 
public string Name {get:set:}

例如

C＃Neo4J查询不返回节点属性

1 个答案: