dferens/DBStorageLib

Basic ORM features, like storing objects in an automatically generated table, adding/deleting, with focus on different DBMS

DBStorageLib

Basic ORM features, like storing objects in an automatically generated table, adding/deleting, with focus on different DBMS. Is used by .NET labs in my university

How-to use :

1. Add "DBStorageParams" attribute to your class and define connection string.
2. Derive your class from XXXStorageItem (for example - SQLiteStorageItem).
3. Add "DBColumn" attribute to any public/private field/property you want to save in database.
4. Declare private constructor with single object paremeter that calls "base(null)".
5. Call "Core.Init" before any use, and "Core.Close" after last use of your instances"

Example

// in EmploymentRecord.cs
[DBStorageParams("data source=database.db")]
public class EmploymentRecord : SQLiteStorageItem
{
    [DBColumn]
    private Guid _positionID;     // will save with "_positionID" column name 
    [DBColumn("YourCustomName")]  // will save with "YourCustomName" column name
    private Guid _personID;
    public Position Position { /* code here */ }
    public Person Person { /* code here */ }
    [DBColumn]
    public Decimal EmploymentValue;
    [DBColumn]
    public DateTime HireDate;
    [DBColumn]
    public DateTime FireDate;

    public EmploymentRecord(Position position, Person person, Decimal employmentValue,
                            DateTime hireDate, DateTime fireDate)
    {
        this.Position = position;
        this.Person = person;
        this.EmploymentValue = employmentValue;
        this.HireDate = hireDate;
        this.FireDate = fireDate;
    }
    
    // For internal library's usage
    private EmploymentRecord(object nothing) : base(null) { }
}

// in Program.cs or anywhere
static void Main(string[] args)
{
    DBStorageLib.Core.Init();
    
    // Your code
    // You can add as a static field to your class 
    SQLiteStorage storage = (SQLiteStorage)Core.GetStorage(typeof(EmploymentRecord));

    foreach (EmploymentRecord item in storage.Items.Values)
    {
            // Iterate over dictionary
    }

    // Get item by ID
    storage.GetItem(Guid.NewGuid());
    // or
    storage[Guid.NewGuid()];

    // end
    DBStorageLib.Core.Close();
}