첨부 소스 코드는 나눔고딕코딩 폰트를 사용합니다.
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TestProject.zip
0.00MB

▶ Group.cs

namespace TestProject;

/// <summary>
/// 그룹
/// </summary>
public class Group
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Property
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region ID - ID

    /// <summary>
    /// ID
    /// </summary>
    public int ID { get; set; }

    #endregion
    #region 명칭 - Name

    /// <summary>
    /// 명칭
    /// </summary>
    public string Name { get; set; }

    #endregion
}

 

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▶ Member.cs

namespace TestProject;

/// <summary>
/// 회원
/// </summary>
public class Member
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Property
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region ID - ID

    /// <summary>
    /// ID
    /// </summary>
    public int ID { get; set; }

    #endregion
    #region 성명 - Name

    /// <summary>
    /// 성명
    /// </summary>
    public string Name { get; set; }

    #endregion
    #region 그룹 ID - GroupID

    /// <summary>
    /// 그룹 ID
    /// </summary>
    public int? GroupID { get; set; }

    #endregion
}

 

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▶ Program.cs

using NMemory;
using NMemory.Indexes;
using NMemory.Tables;

namespace TestProject;

/// <summary>
/// 프로그램
/// </summary>
class Program
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Static
    //////////////////////////////////////////////////////////////////////////////// Private

    #region 프로그램 시작하기 - Main()

    /// <summary>
    /// 프로그램 시작하기
    /// </summary>
    private static void Main()
    {
        Database database = new Database();

        Table<Group , int> groupTable  = database.Tables.Create<Group , int>(group  => group.ID , null);
        Table<Member, int> memberTable = database.Tables.Create<Member, int>(member => member.ID, null);

        IIndex<Member, int?> memberGroupIDIndex = memberTable.CreateIndex(new RedBlackTreeIndexFactory(), member => member.GroupID);

        database.Tables.CreateRelation
        (
            groupTable.PrimaryKeyIndex,
            memberGroupIDIndex,
            x => x ?? -1,
            x => x
        );

        groupTable.Insert(new Group() { ID = 1, Name = "그룹 1"});
        groupTable.Insert(new Group() { ID = 2, Name = "그룹 2"});

        memberTable.Insert(new Member() { ID = 1, Name = "김철수", GroupID = 1 });
        memberTable.Insert(new Member() { ID = 2, Name = "홍길동", GroupID = 1 });
        memberTable.Insert(new Member() { ID = 3, Name = "홍삼수", GroupID = 1 });
        memberTable.Insert(new Member() { ID = 4, Name = "김영희", GroupID = 2 });
        memberTable.Insert(new Member() { ID = 5, Name = "이주희", GroupID = 2 });

        memberTable.Update(new Member() { ID = 3, Name = "홍삼수 (수정)", GroupID = 1 });

        foreach(Member member in memberTable)
        {
            Console.WriteLine($"{member.Name}, {member.GroupID}");
        }
    }

    #endregion
}
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