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ComponentCollection Kelas

Definisi

Menyediakan kontainer baca-saja untuk kumpulan IComponent objek.

public ref class ComponentCollection : System::Collections::ReadOnlyCollectionBase
public ref class ComponentCollection
public class ComponentCollection : System.Collections.ReadOnlyCollectionBase
public class ComponentCollection
[System.Runtime.InteropServices.ComVisible(true)]
public class ComponentCollection : System.Collections.ReadOnlyCollectionBase
type ComponentCollection = class
    inherit ReadOnlyCollectionBase
type ComponentCollection = class
[<System.Runtime.InteropServices.ComVisible(true)>]
type ComponentCollection = class
    inherit ReadOnlyCollectionBase
Public Class ComponentCollection
Inherits ReadOnlyCollectionBase
Public Class ComponentCollection
Warisan
ComponentCollection
Warisan
ComponentCollection
Atribut

Contoh

Contoh kode berikut menunjukkan cara menggunakan ComponentCollection untuk menghitung kumpulan objek kustom BookComponent .

//This code segment implements the IContainer interface.  The code segment 
//containing the implementation of ISite and IComponent can be found in the documentation
//for those interfaces.

//Implement the LibraryContainer using the IContainer interface.

class LibraryContainer : IContainer
{
    private ArrayList m_bookList;

    public LibraryContainer()
    {
        m_bookList = new ArrayList();
    }

    public virtual void Add(IComponent book)
    {
        //The book will be added without creation of the ISite object.
        m_bookList.Add(book);
    }

    public virtual void Add(IComponent book, string ISNDNNum)
    {
        for(int i =0; i < m_bookList.Count; ++i)
        {
            IComponent curObj = (IComponent)m_bookList[i];
            if(curObj.Site != null)
            {
                if(curObj.Site.Name.Equals(ISNDNNum))
                    throw new ArgumentException("The ISBN number already exists in the container"); 
            }
        }

        ISBNSite data = new ISBNSite(this, book);
        data.Name = ISNDNNum;
        book.Site = data;
        m_bookList.Add(book);
    }

    public virtual void Remove(IComponent book)
    {
        for(int i =0; i < m_bookList.Count; ++i)
        {				
            if(book.Equals(m_bookList[i]))
            {
                m_bookList.RemoveAt(i);
                    break;
            }
        }
    }

    public ComponentCollection Components
    {
        get
        {
            IComponent[] datalist = new BookComponent[m_bookList.Count];
            m_bookList.CopyTo(datalist);
            return new ComponentCollection(datalist);
        }
    }

    public virtual void Dispose()
    {	
        for(int i =0; i < m_bookList.Count; ++i)
        {
            IComponent curObj = (IComponent)m_bookList[i];
            curObj.Dispose();
        }
        
        m_bookList.Clear();
    }

    static void Main(string[] args)
    {
        LibraryContainer cntrExmpl = new LibraryContainer();

        try 
        {
            BookComponent book1 = new BookComponent("Wizard's First Rule", "Terry Gooodkind");
            cntrExmpl.Add(book1, "0812548051");
            BookComponent book2 = new BookComponent("Stone of Tears", "Terry Gooodkind");
            cntrExmpl.Add(book2, "0812548094");
            BookComponent book3 = new BookComponent("Blood of the Fold", "Terry Gooodkind");
            cntrExmpl.Add(book3, "0812551478");
            BookComponent book4 = new BookComponent("The Soul of the Fire", "Terry Gooodkind");
            //This will generate exception because the ISBN already exists in the container.
            cntrExmpl.Add(book4, "0812551478");
        }
        catch (ArgumentException e)
        {
            Console.WriteLine("Unable to add books: " + e.Message);
        }

        ComponentCollection datalist =cntrExmpl.Components;
        IEnumerator denum = datalist.GetEnumerator();

        while(denum.MoveNext())
        {
            BookComponent cmp = (BookComponent)denum.Current;
            Console.WriteLine("Book Title: " + cmp.Title);
            Console.WriteLine("Book Author: " + cmp.Author);
            Console.WriteLine("Book ISBN: " + cmp.Site.Name);
        }
    }
}
    'This code segment implements the IContainer interface.  The code segment 
    'containing the implementation of ISite and IComponent can be found in the documentation
    'for those interfaces.
    
    'Implement the LibraryContainer using the IContainer interface.

Class LibraryContainer
    Implements IContainer
    Private m_bookList As ArrayList

    Public Sub New()
        m_bookList = New ArrayList()
    End Sub

    Public Sub Add(ByVal book As IComponent) Implements IContainer.Add
        'The book will be added without creation of the ISite object.
        m_bookList.Add(book)
    End Sub

    Public Sub Add(ByVal book As IComponent, ByVal ISNDNNum As String) Implements IContainer.Add

        Dim i As Integer
        Dim curObj As IComponent

        For i = 0 To m_bookList.Count - 1
            curObj = CType(m_bookList(i), IComponent)
            If curObj.Site IsNot Nothing Then
                If (curObj.Site.Name.Equals(ISNDNNum)) Then
                    Throw New ArgumentException("The ISBN number already exists in the container")
                End If
            End If
        Next i

        Dim data As ISBNSite = New ISBNSite(Me, book)
        data.Name = ISNDNNum
        book.Site = data
        m_bookList.Add(book)

    End Sub

    Public Sub Remove(ByVal book As IComponent) Implements IContainer.Remove
        Dim i As Integer
        Dim curComp As BookComponent = CType(book, BookComponent)

        For i = 0 To m_bookList.Count - 1
            If (curComp.Equals(m_bookList(i)) = True) Then
                m_bookList.RemoveAt(i)
                Exit For
            End If
        Next i
    End Sub


    Public ReadOnly Property Components() As ComponentCollection Implements IContainer.Components
        Get
            Dim datalist(m_bookList.Count - 1) As IComponent
            
            m_bookList.CopyTo(datalist)
            Return New ComponentCollection(datalist)
        End Get
    End Property

    Public Overridable Sub Dispose() Implements IDisposable.Dispose
        Dim i As Integer
        For i = 0 To m_bookList.Count - 1
            Dim curObj As IComponent = CType(m_bookList(i), IComponent)
            curObj.Dispose()
        Next i

        m_bookList.Clear()
    End Sub

    Public Shared Sub Main()
        Dim cntrExmpl As LibraryContainer = New LibraryContainer()

        Try
            Dim book1 As BookComponent = New BookComponent("Wizard's First Rule", "Terry Gooodkind")
            cntrExmpl.Add(book1, "0812548051")
            Dim book2 As BookComponent = New BookComponent("Stone of Tears", "Terry Gooodkind")
            cntrExmpl.Add(book2, "0812548094")
            Dim book3 As BookComponent = New BookComponent("Blood of the Fold", "Terry Gooodkind")
            cntrExmpl.Add(book3, "0812551478")
            Dim book4 As BookComponent = New BookComponent("The Soul of the Fire", "Terry Gooodkind")
            'This will generate an exception, because the ISBN already exists in the container.
            cntrExmpl.Add(book4, "0812551478")
        Catch e As ArgumentException
            Console.WriteLine("Unable to add books: " + e.Message)
        End Try

        Dim datalist As ComponentCollection = cntrExmpl.Components
        Dim denum As IEnumerator = datalist.GetEnumerator()

        While (denum.MoveNext())
            Dim cmp As BookComponent = CType(denum.Current, BookComponent)
            Console.WriteLine("Book Title: " + cmp.Title)
            Console.WriteLine("Book Author: " + cmp.Author)
            Console.WriteLine("Book ISBN: " + cmp.Site.Name)
        End While
    End Sub
End Class

Keterangan

Koleksi ini mewarisi dari ReadOnlyCollectionBase. Satu-satunya cara untuk menambahkan IComponent objek ke koleksi ini adalah dengan menggunakan konstruktor kelas.

Koleksi ini menyediakan dua properti pengindeks, pengindeks string, dan pengindeks bilangan bulat. Properti pengindeks string mengembalikan komponen dalam koleksi berdasarkan nama jika Site properti komponen dalam koleksi tidak null dan Name properti Site properti komponen cocok dengan string yang ditentukan. Properti pengindeks bilangan bulat mengembalikan pada IComponent indeks koleksi yang ditentukan. Metode CopyTo menyalin konten koleksi ke array tertentu, mulai menulis ke array pada indeks yang ditentukan.

Konstruktor

ComponentCollection(IComponent[])

Menginisialisasi instans ComponentCollection baru kelas menggunakan array komponen yang ditentukan.

Properti

Count

Mendapatkan jumlah elemen yang terkandung dalam ReadOnlyCollectionBase instans.

(Diperoleh dari ReadOnlyCollectionBase)
InnerList

Mendapatkan daftar elemen yang terkandung dalam ReadOnlyCollectionBase instans.

(Diperoleh dari ReadOnlyCollectionBase)
Item[Int32]

Component Mendapatkan dalam koleksi di indeks koleksi yang ditentukan.

Item[String]

Mendapatkan komponen apa pun dalam koleksi yang cocok dengan nama yang ditentukan.

Metode

CopyTo(IComponent[], Int32)

Menyalin seluruh koleksi ke array, mulai menulis pada indeks array yang ditentukan.

Equals(Object)

Menentukan apakah objek yang ditentukan sama dengan objek saat ini.

(Diperoleh dari Object)
GetEnumerator()

Mengembalikan enumerator yang melakukan iterasi melalui ReadOnlyCollectionBase instans.

(Diperoleh dari ReadOnlyCollectionBase)
GetHashCode()

Berfungsi sebagai fungsi hash default.

(Diperoleh dari Object)
GetType()

Mendapatkan instans Type saat ini.

(Diperoleh dari Object)
MemberwiseClone()

Membuat salinan dangkal dari yang saat ini Object.

(Diperoleh dari Object)
ToString()

Mengembalikan string yang mewakili objek saat ini.

(Diperoleh dari Object)

Implementasi Antarmuka Eksplisit

ICollection.CopyTo(Array, Int32)

Menyalin seluruh ReadOnlyCollectionBase ke satu dimensi Arrayyang kompatibel, dimulai dari indeks array target yang ditentukan.

(Diperoleh dari ReadOnlyCollectionBase)
ICollection.IsSynchronized

Mendapatkan nilai yang menunjukkan apakah akses ke ReadOnlyCollectionBase objek disinkronkan (utas aman).

(Diperoleh dari ReadOnlyCollectionBase)
ICollection.SyncRoot

Mendapatkan objek yang dapat digunakan untuk menyinkronkan akses ke ReadOnlyCollectionBase objek.

(Diperoleh dari ReadOnlyCollectionBase)

Metode Ekstensi

Cast<TResult>(IEnumerable)

Mentransmisikan elemen dari IEnumerable ke jenis yang ditentukan.

OfType<TResult>(IEnumerable)

Memfilter elemen berdasarkan IEnumerable jenis tertentu.

AsParallel(IEnumerable)

Mengaktifkan paralelisasi kueri.

AsQueryable(IEnumerable)

Mengonversi menjadi IEnumerableIQueryable.

Berlaku untuk

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