Introduction
Starcounter 3.0.0 Release Candidate is available for general access.
Downloads:
- The
startool is a cross-platform console application with SQL REPL & database import/export features. - Starcounter apps can now be distributed as a regular .NET Core app in framework dependent and self contained modes. Read more.
- It's now possible to execute DML & DDL SQL statements using the
startool. - Starcounter namespace has been changed from
Starcounter.Nova.ApptoStarcounter.Database.
- Read more about Dependency Injection on the official Microsoft documentation page - Dependency injection in ASP.NET Core.
- Checkout ASP.NET Core sample controller with Starcounter database access using Dependency Injection (DI).
- Enough RAM to load database of targeted size.
- It's recommended to have at least two CPU cores.
Note: Please let us know if you encounter any issues while working with Starcounter. We monitor our GitHub: Starcounter/Home issue tracker and stand ready to assist.
Note: This section assumes that you have required operating system and .NET Core
3.0.100 SDK installed.- Create a folder for Starcounter binaries, for example
Starcounter.3.0.0-rc-20191212. - Unzip downloaded archive into the folder.
On Windows Starcounter requires x64 version of Visual C++ to be installed. Download and install it from the Microsoft website:
Make sure to
Unblock the archive after downloading prior to extracting it. See the screenshot below:
Install prerequisites.
sudo apt-get install wget unzip
sudo apt-get install libaio1 libtinfo5
sudo add-apt-repository ppa:swi-prolog/stable
sudo apt-get update
sudo apt-get install swi-prolog-nox=7.\*
Download and unpack Starcounter binaries.
cd $HOME
mkdir Starcounter.3.0.0-rc-20191212
cd Starcounter.3.0.0-rc-20191212
wget https://starcounter.io/Starcounter/Starcounter.3.0.0-rc-20191212.zip
unzip Starcounter.3.0.0-rc-20191212.zip
Create an application folder and initialize a .NET Core console application.
mkdir StarcounterConsoleSample
cd StarcounterConsoleSample
dotnet new console
All the following commands shall be executed from the
StarcounterConsoleSample folder.Setup NuGet to consume Starcounter packages feeds.
Create
nuget.config file and add required package sources:local, points to the Starcounter binaries folder.Starcounter, points tohttps://www.myget.org/F/starcounter/api/v2.
NuGet tips:
End file should look similar to this:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<packageSources>
<clear />
<add key="local" value="[Starcounter.3.0.0-rc-20191212]" />
<add key="Starcounter" value="https://www.myget.org/F/starcounter/api/v2" />
<add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
</packageSources>
</configuration>
Visual Studio Setup:
Visual Studio requires manual NuGet package sources configuration. For this go to the
Tools → Options → NuGet Package Manager → Package Sources menu then add local and Starcounter feeds.Note: Replace the
[Starcounter.3.0.0-rc-20191212] value with the actual path to the folder with unzipped Starcounter binaries.Add Starcounter.Database package reference
dotnet add package Starcounter.Database --version 3.0.0-*
Add minimal Starcounter database access
Replace content of the
Program.cs file with the following:using System;
using System.Linq;
using Starcounter.Database;
using Microsoft.Extensions.DependencyInjection;
namespace StarcounterConsoleSample
{
[Database]
public abstract class Person
{
public abstract string Name { get; set; }
}
public class Program
{
public static void Main()
{
string connectionString =
"Database=./.database/StarcounterConsoleSample;"
+ "OpenMode=CreateIfNotExists;"
+ "StartMode=StartIfNotRunning;"
+ "StopMode=IfWeStarted";
// Here we create a service collection that
// we add the Starcounter services to.
// When we call BuildServiceProvider(), we get an instance
// that we can use to fetch service instances,
// for example ITransactor, which we then can use to
// to make database transactions.
using var services = new ServiceCollection()
.AddStarcounter(connectionString)
.BuildServiceProvider();
// Here we fetch our ITransactor instance from the service provider.
var transactor = services.GetRequiredService<ITransactor>();
// And here we use it to make a database transaction.
var name = transactor.Transact(db =>
{
// Here inside the transaction,
// we can use the IDatabaseContext instance
// to interact with the Starcounter database.
// We can query it using SQL
// (which returns an IEnumerable<Person>
// that we can use with LINQ).
var p = db.Sql<Person>
(
"SELECT p FROM Person p WHERE Name = ?",
"Jane"
).FirstOrDefault();
if (p == null)
{
// We can insert new rows in the database using Insert().
p = db.Insert<Person>();
// We write to the database row
// using standard C# property accessors.
p.Name = "Jane";
}
// Let's return the name as result of the transaction.
return p.Name;
});
// And let's print it in the console
Console.WriteLine(name);
}
}
}
For ASP.NET Core applications:
Update
Startup.cs class with the following:using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
namespace StarcounterMvcSample
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
string connectionString =
"Database=./.database/StarcounterMvcSample;"
+ "OpenMode=CreateIfNotExists;"
+ "StartMode=StartIfNotRunning;"
+ "StopMode=IfWeStarted";
// This adds and configures Starcounter services to our application,
// for example ITransactor,
// that allows us to create database transactions.
services.AddStarcounter(connectionString);
}
}
}
Note: Starcounter works with Kestrel Web Server only. IIS and IIS Express are not yet supported.
- Open Visual Studio Code in the application folder (from command line:
code ./). - Restore dependencies Visual Studio Code asks for.
- Click
Ctrl + F5to start the application.
Everything should run out of the box.
- Update Visual Studio 2019 to the latest version using Visual Studio Installer.
- We checked version 16.3.0.
- Open
StarcounterConsoleSample.csprojfrom Visual Studio. - Click
Ctrl + F5to start the application.
Before asking questions or reporting issues, please read these few lines, and maybe you will find an answer for your question.
- Publishing application in a single file with
dotnet publish /p:PublishSingleFile=trueis not yet supported.
Last modified 3yr ago