ComponentCollectionとは? わかりやすく解説

ComponentCollection クラス

IComponent オブジェクトコレクション用の読み取り専用コンテナ提供します

名前空間: System.ComponentModel
アセンブリ: System (system.dll 内)
構文構文

<ComVisibleAttribute(True)> _
Public Class ComponentCollection
    Inherits ReadOnlyCollectionBase
Dim instance As ComponentCollection
[ComVisibleAttribute(true)] 
public class ComponentCollection : ReadOnlyCollectionBase
[ComVisibleAttribute(true)] 
public ref class ComponentCollection : public
 ReadOnlyCollectionBase
/** @attribute ComVisibleAttribute(true) */ 
public class ComponentCollection extends ReadOnlyCollectionBase
ComVisibleAttribute(true) 
public class ComponentCollection extends
 ReadOnlyCollectionBase
解説解説

このコレクションは ReadOnlyCollectionBase から継承しますクラス コンストラクタ使用した場合だけに、このコレクションIComponent オブジェクト追加できます

このコレクションは、文字列インデクサ整数インデクサ2 つインデクサ プロパティ提供します文字列インデクサ プロパティは、コレクション含まれるコンポーネントSite プロパティnull 参照 (Visual Basic では Nothing) ではなくコンポーネントSite プロパティName プロパティ指定した文字列一致する場合、名前によってコレクション内のコンポーネント正しく返します整数インデクサ プロパティは、指定したコレクション インデックスIComponent返しますCopyTo メソッドは、コレクション内容指定され配列コピーします配列への書き込み指定されインデックスから開始されます。

メモメモ

このクラス適用される HostProtectionAttribute 属性Resources プロパティの値は、Synchronization です。HostProtectionAttribute は、デスクトップ アプリケーション (一般的にはアイコンダブルクリックコマンド入力、またはブラウザURL入力して起動するアプリケーション) には影響しません。詳細については、HostProtectionAttribute クラストピックまたは「SQL Server プログラミングホスト保護属性」を参照してください

使用例使用例

ComponentCollection使用してカスタム BookComponent オブジェクトコレクション列挙する方法次のコード例示します

    '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 Not curObj.Site Is
 Nothing Then
                If (curObj.Site.Name.Equals(ISNDNNum)) Then
                    Throw New SystemException("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 SystemException
            Console.WriteLine("Error description: "
 + 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
//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 SystemException("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(SystemException e)
        {
            Console.WriteLine("Error description: " + 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 ArrayList mBookList;

    public LibraryContainer()
    {
        mBookList = new ArrayList();
    } //LibraryContainer

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

    public void Add(IComponent book, String
 isndNNum) throws SystemException
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            IComponent curObj = (IComponent)mBookList.get_Item(i);
            if (curObj.get_Site() != null)
 {
                if (curObj.get_Site().get_Name().Equals(isndNNum))
 {
                    throw new SystemException(
                        "The ISBN number already exists in
 the container");
                }
            }
        }
        ISBNSite data = new ISBNSite(this,
 book);
        data.set_Name(isndNNum);
        book.set_Site(data);
        mBookList.Add(book);
    } //Add

    public void Remove(IComponent book)
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            if (book.Equals(mBookList.get_Item(i))) {
                mBookList.RemoveAt(i);
                break;
            }
        }
    } //Remove

    /** @property 
     */
    public ComponentCollection get_Components()
    {
        IComponent dataList[] = new BookComponent[mBookList.get_Count()];
        mBookList.CopyTo(dataList);
        return new ComponentCollection(dataList);
    } //get_Components

    public void Dispose()
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            IComponent curObj = (IComponent)mBookList.get_Item(i);
            curObj.Dispose();
        }
        mBookList.Clear();
    } //Dispose

    public 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 (SystemException e) {
            Console.WriteLine("Error description: " + e.get_Message());
        }
        ComponentCollection dataList = cntrExmpl.get_Components();
        IEnumerator denum = dataList.GetEnumerator();

        while (denum.MoveNext()) {
            BookComponent cmp = (BookComponent)denum.get_Current();
            Console.WriteLine("Book Title: " + cmp.get_Title());
            Console.WriteLine("Book Author: " + cmp.get_Author());
            Console.WriteLine("Book ISBN: " + cmp.get_Site().get_Name());
        }
    } //main
} //LibraryContainer
継承階層継承階層
System.Object
   System.Collections.ReadOnlyCollectionBase
    System.ComponentModel.ComponentCollection
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照

ComponentCollection コンストラクタ

指定したコンポーネント配列使用して、ComponentCollection クラス新しインスタンス初期化します。

名前空間: System.ComponentModel
アセンブリ: System (system.dll 内)
構文構文

Public Sub New ( _
    components As IComponent() _
)
Dim components As IComponent()

Dim instance As New ComponentCollection(components)
public ComponentCollection (
    IComponent[] components
)
public:
ComponentCollection (
    array<IComponent^>^ components
)
public ComponentCollection (
    IComponent[] components
)
public function ComponentCollection (
    components : IComponent[]
)

パラメータ

components

コレクション初期化するために使用する IComponent オブジェクト配列

解説解説

このメソッドは、指定した IComponent 配列の各 IComponentコレクション追加します

使用例使用例

BookComponent オブジェクト配列から ComponentCollection作成する方法次のコード例示します

    '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 Not curObj.Site Is
 Nothing Then
                If (curObj.Site.Name.Equals(ISNDNNum)) Then
                    Throw New SystemException("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 SystemException
            Console.WriteLine("Error description: "
 + 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
//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 SystemException("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(SystemException e)
        {
            Console.WriteLine("Error description: " + 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 ArrayList mBookList;

    public LibraryContainer()
    {
        mBookList = new ArrayList();
    } //LibraryContainer

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

    public void Add(IComponent book, String
 isndNNum) throws SystemException
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            IComponent curObj = (IComponent)mBookList.get_Item(i);
            if (curObj.get_Site() != null)
 {
                if (curObj.get_Site().get_Name().Equals(isndNNum))
 {
                    throw new SystemException(
                        "The ISBN number already exists in
 the container");
                }
            }
        }
        ISBNSite data = new ISBNSite(this,
 book);
        data.set_Name(isndNNum);
        book.set_Site(data);
        mBookList.Add(book);
    } //Add

    public void Remove(IComponent book)
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            if (book.Equals(mBookList.get_Item(i))) {
                mBookList.RemoveAt(i);
                break;
            }
        }
    } //Remove

    /** @property 
     */
    public ComponentCollection get_Components()
    {
        IComponent dataList[] = new BookComponent[mBookList.get_Count()];
        mBookList.CopyTo(dataList);
        return new ComponentCollection(dataList);
    } //get_Components

    public void Dispose()
    {
        for (int i = 0; i < mBookList.get_Count();
 ++i) {
            IComponent curObj = (IComponent)mBookList.get_Item(i);
            curObj.Dispose();
        }
        mBookList.Clear();
    } //Dispose

    public 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 (SystemException e) {
            Console.WriteLine("Error description: " + e.get_Message());
        }
        ComponentCollection dataList = cntrExmpl.get_Components();
        IEnumerator denum = dataList.GetEnumerator();

        while (denum.MoveNext()) {
            BookComponent cmp = (BookComponent)denum.get_Current();
            Console.WriteLine("Book Title: " + cmp.get_Title());
            Console.WriteLine("Book Author: " + cmp.get_Author());
            Console.WriteLine("Book ISBN: " + cmp.get_Site().get_Name());
        }
    } //main
} //LibraryContainer
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
ComponentCollection クラス
ComponentCollection メンバ
System.ComponentModel 名前空間

ComponentCollection プロパティ


ComponentCollection メソッド


パブリック メソッドパブリック メソッド

プロテクト メソッドプロテクト メソッド
参照参照

関連項目

ComponentCollection クラス
System.ComponentModel 名前空間
IComponent

ComponentCollection メンバ

IComponent オブジェクトコレクション用の読み取り専用コンテナ提供します

ComponentCollection データ型公開されるメンバを以下の表に示します


パブリック コンストラクタパブリック コンストラクタ
パブリック プロパティパブリック プロパティ
プロテクト プロパティプロテクト プロパティ
  名前 説明
プロテクト プロパティ InnerList  ReadOnlyCollectionBase インスタンス格納されている要素リスト取得します。(ReadOnlyCollectionBase から継承されます。)
パブリック メソッドパブリック メソッド
プロテクト メソッドプロテクト メソッド
参照参照

関連項目

ComponentCollection クラス
System.ComponentModel 名前空間
IComponent



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