ComponentCollection 构造函数

使用指定的组件数组初始化 ComponentCollection 类的新实例。

**命名空间:**System.ComponentModel
**程序集:**System（在 system.dll 中）

语法

声明
Public Sub New ( _
    components As IComponent() _
)
用法
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[]
)

参数

• components
  用来初始化集合的 IComponent 对象数组。

备注

此方法将指定的 IComponent 数组中的每个 IComponent 添加到集合中。

示例

下面的代码示例演示如何从 BookComponent 对象数组创建 ComponentCollection。

   '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

平台

Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

ComponentCollection 类
ComponentCollection 成员
System.ComponentModel 命名空间