从C＃中的Neo4j数据库返回所有节点

Question

I am still very new to programming, but what I am trying to reach for now is a piece of code that will show me all of my nodes in my Visual studio. I connected my c# to my database, but what I can't see why I can't show back my nodes. The .Results is giving an error and I can't see why. My code is looking like this so far. Could someone explain what and more importantly why this piece is not working?

class DatabaseConnection
{
    GraphClient dbclient;

    public DatabaseConnection(){
        dbclient = new GraphClient(new Uri("http://localhost:7474/db/data"));
        dbclient.Connect();

        dbclient.Cypher
        .Match("(type:PhonePart)")
        .Return(type => type.As<PhoneItems>())
        .Results
    }

}
public class PhoneItems
{
    public string PhonePart { get; set; }  
}

Answer 1

Your issue here is actually with C# syntax, not Neo4j at all.

This error is because you've referenced a property, Results , but not told the compiler what to do with it. It's like typing 3 in your code and then just leaving it hanging: do you want it assigned to a variable, printed out, or something else?

All you need to do is assign this to something:

dbclient.Cypher
    .Match("(type:PhonePart)")
    .Return(type => type.As<PhoneItems>())
    .Results

Like so:

var phoneItems = dbclient.Cypher
    .Match("(type:PhonePart)")
    .Return(type => type.As<PhoneItems>())
    .Results;

Then, your code will compile.

Next, you want to do something with these phone numbers, maybe like so:

foreach (var phone in phoneItems)
{
    Console.WriteLine(phone.PhonePart);
}

Hope that helps!