C# driver
The C# driver was developed by the TypeDB team to enable TypeDB support for C# software and developers.
Install
The driver is based on the cross-platform .NET 6 framework.
For Linux: the minimum version of glibc is 2.25.0.
See the Version Compatibility table to check what versions of TypeDB and C# driver are compatible.
To install the TypeDB C# driver,
Download the latest release of the driver and its
Pinvoke runtime
for your architecture (x86_64/arm64) and OS (Linux/macOS/Win).
Here is an example from the .csproj file for macOS and x86_64:
<PackageReference Include="TypeDB.Driver" Version={VERSION} />
<PackageReference Include="TypeDB.Driver.Pinvoke.osx-x64" Version={VERSION} />If you aim to build a platform-independent package, reference all the needed runtimes (it will affect the size of the application):
<PackageReference Include="TypeDB.Driver.Pinvoke.osx-x64" Version={VERSION} />
<PackageReference Include="TypeDB.Driver.Pinvoke.osx-arm64" Version={VERSION} />
<PackageReference Include="TypeDB.Driver.Pinvoke.linux-x64" Version={VERSION} />
<PackageReference Include="TypeDB.Driver.Pinvoke.linux-arm64" Version={VERSION} />
<PackageReference Include="TypeDB.Driver.Pinvoke.win-x64" Version={VERSION} />Quickstart
See below a short example of C# code that connects to a local TypeDB Core,
creates a database named access-management-db, defines a schema, inserts some data, and then reads it.
using TypeDB.Driver;
using TypeDB.Driver.Api;
using TypeDB.Driver.Common;
class WelcomeToTypeDB
{
static void Main(string[] args)
{
string dbName = "access-management-db";
string serverAddr = "127.0.0.1:1729";
try
{
using (ITypeDBDriver driver = Drivers.CoreDriver(serverAddr))
{
driver.Databases.Create(dbName);
IDatabase database = driver.Databases.Get(dbName);
// Example of one transaction for one session
using (ITypeDBSession session = driver.Session(dbName, SessionType.Schema))
{
// Example of multiple queries for one transaction
using (ITypeDBTransaction transaction = session.Transaction(TransactionType.Write))
{
transaction.Query.Define("define person sub entity;").Resolve();
string longQuery = "define name sub attribute, value string; person owns name;";
transaction.Query.Define(longQuery).Resolve();
transaction.Commit();
}
}
// Example of multiple transactions for one session
using (ITypeDBSession session = driver.Session(dbName, SessionType.Data))
{
// Examples of one query for one transaction
using (ITypeDBTransaction transaction = session.Transaction(TransactionType.Write))
{
string query = "insert $p isa person, has name 'Alice';";
IEnumerable<IConceptMap> insertResults = transaction.Query.Insert(query);
Console.WriteLine($"Inserted with {insertResults.Count()} result(s)");
transaction.Commit();
}
using (ITypeDBTransaction transaction = session.Transaction(TransactionType.Write))
{
IEnumerable<IConceptMap> insertResults =
transaction.Query.Insert("insert $p isa person, has name 'Bob';");
foreach (IConceptMap insertResult in insertResults)
{
Console.WriteLine($"Inserted: {insertResult}");
}
// transaction.Commit(); // Not committed
}
using (ITypeDBTransaction transaction = session.Transaction(TransactionType.Read))
{
IConceptMap[] matchResults =
transaction.Query.Get("match $p isa person, has name $n; get $n;").ToArray();
// Matches only Alice as Bob has not been committed
var resultName = matchResults[0].Get("n");
Console.WriteLine($"Found the first name: {resultName.AsAttribute().Value.AsString()}");
if (matchResults.Length > 1) // Will work only if the previous transaction is committed
{
Console.WriteLine($"Found the second name as concept: {matchResults[1]}");
}
}
}
database.Delete();
}
}
catch (TypeDBDriverException e)
{
Console.WriteLine($"Caught TypeDB Driver Exception: {e}");
// ...
}
}
}For more information on methods used above and other capabilities, see the API reference link below.
Learn more
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