使用 Neo4j 和 .NET 构建应用程序

dotnet add package Neo4j.Driver

using Neo4j.Driver;

// URI examples: "neo4j://", "neo4j+s://xxx.databases.neo4j.io"
const string dbUri = "<database-uri>";
const string dbUser = "<username>";
const string dbPassword = "<password>";

await using var driver = GraphDatabase.Driver(dbUri, AuthTokens.Basic(dbUser, dbPassword));
await driver.VerifyConnectivityAsync();
Console.WriteLine("Connection established.");

var result = await driver.ExecutableQuery(@"
    CREATE (a:Person {name: $name})
    CREATE (b:Person {name: $friendName})
    CREATE (a)-[:KNOWS]->(b)
    ")
    .WithParameters(new { name = "Alice", friendName = "David" })
    .WithConfig(new QueryConfig(database: "<database-name>"))
    .ExecuteAsync();

// Summary information
var summary = result.Summary;
Console.WriteLine($"Created {summary.Counters.NodesCreated} nodes in {summary.ResultAvailableAfter.Milliseconds} ms.");

var result = await driver.ExecutableQuery(@"
    MATCH (p:Person)-[:KNOWS]->(:Person)
    RETURN p.name AS name
    ")
    .WithConfig(new QueryConfig(database: "<database-name>"))
    .ExecuteAsync();

// Loop through results and print people's name
foreach (var record in result.Result) {
    Console.WriteLine(record.Get<string>("name"));
}

// Summary information
var summary = result.Summary;
Console.WriteLine($"The query `{summary.Query.Text}` returned {result.Result.Count()} results in {summary.ResultAvailableAfter.Milliseconds} ms.");

await session.DisposeAsync();
await driver.DisposeAsync();