TreeNodeCollection 類別

定義

表示 TreeNode 物件的集合。

public ref class TreeNodeCollection : System::Collections::IList
public class TreeNodeCollection : System.Collections.IList
type TreeNodeCollection = class
    interface IList
    interface ICollection
    interface IEnumerable
Public Class TreeNodeCollection
Implements IList
繼承
TreeNodeCollection
實作

範例

下列程式碼範例會在 控制項中 TreeView 顯示客戶資訊。 根樹狀節點會顯示客戶名稱,子樹狀節點會顯示指派給每位客戶的訂單編號。 在此範例中,1,000 個客戶會分別顯示 15 個訂單。 的重 TreeView 繪會使用 BeginUpdateEndUpdate 方法隱藏,而且會在建立和繪製 TreeNode 物件時 TreeView 顯示等候 Cursor 。 此範例會要求您擁有 Customer 可保存 物件集合的 Order 物件。 它也需要您已在 上 Form 建立 控制項的 TreeView 實例。

// The basic Customer class.
ref class Customer: public System::Object
{
private:
   String^ custName;

protected:
   ArrayList^ custOrders;

public:
   Customer( String^ customername )
   {
      custName = "";
      custOrders = gcnew ArrayList;
      this->custName = customername;
   }


   property String^ CustomerName 
   {
      String^ get()
      {
         return this->custName;
      }

      void set( String^ value )
      {
         this->custName = value;
      }

   }

   property ArrayList^ CustomerOrders 
   {
      ArrayList^ get()
      {
         return this->custOrders;
      }

   }

};


// End Customer class
// The basic customer Order class.
ref class Order: public System::Object
{
private:
   String^ ordID;

public:
   Order( String^ orderid )
   {
      ordID = "";
      this->ordID = orderid;
   }


   property String^ OrderID 
   {
      String^ get()
      {
         return this->ordID;
      }

      void set( String^ value )
      {
         this->ordID = value;
      }

   }

};
// End Order class



void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for ( int x = 0; x < 1000; x++ )
   {
      customerArray->Add( gcnew Customer( "Customer " + x ) );
   }
   
   // Add orders to each Customer object in the ArrayList.
   IEnumerator^ myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer1 = safe_cast<Customer^>(myEnum->Current);
      for ( int y = 0; y < 15; y++ )
      {
         customer1->CustomerOrders->Add( gcnew Order( "Order " + y ) );
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   ::Cursor::Current = gcnew System::Windows::Forms::Cursor( "MyWait.cur" );
   
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1->BeginUpdate();
   
   // Clear the TreeView each time the method is called.
   treeView1->Nodes->Clear();
   
   // Add a root TreeNode for each Customer object in the ArrayList.
   myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer2 = safe_cast<Customer^>(myEnum->Current);
      treeView1->Nodes->Add( gcnew TreeNode( customer2->CustomerName ) );
      
      // Add a child treenode for each Order object in the current Customer object.
      IEnumerator^ myEnum = customer2->CustomerOrders->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Order^ order1 = safe_cast<Order^>(myEnum->Current);
         treeView1->Nodes[ customerArray->IndexOf( customer2 ) ]->Nodes->Add( gcnew TreeNode( customer2->CustomerName + "." + order1->OrderID ) );
      }
   }
   
   // Reset the cursor to the default for all controls.
   ::Cursor::Current = Cursors::Default;
   
   // Begin repainting the TreeView.
   treeView1->EndUpdate();
}

// The basic Customer class.
public class Customer : System.Object
{
   private string custName = "";
   protected ArrayList custOrders = new ArrayList();

   public Customer(string customername)
   {
      this.custName = customername;
   }

   public string CustomerName
   {      
      get{return this.custName;}
      set{this.custName = value;}
   }

   public ArrayList CustomerOrders 
   {
      get{return this.custOrders;}
   }
} // End Customer class 

// The basic customer Order class.
public class Order : System.Object
{
   private string ordID = "";

   public Order(string orderid)
   {
      this.ordID = orderid;
   }

   public string OrderID
   {      
      get{return this.ordID;}
      set{this.ordID = value;}
   }
} // End Order class

// Create a new ArrayList to hold the Customer objects.
private ArrayList customerArray = new ArrayList(); 

private void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for(int x=0; x<1000; x++)
   {
      customerArray.Add(new Customer("Customer" + x.ToString()));
   }

   // Add orders to each Customer object in the ArrayList.
   foreach(Customer customer1 in customerArray)
   {
      for(int y=0; y<15; y++)
      {
         customer1.CustomerOrders.Add(new Order("Order" + y.ToString()));    
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = new Cursor("MyWait.cur");
        
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate();

   // Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear();

   // Add a root TreeNode for each Customer object in the ArrayList.
   foreach(Customer customer2 in customerArray)
   {
      treeView1.Nodes.Add(new TreeNode(customer2.CustomerName));
          
      // Add a child treenode for each Order object in the current Customer object.
      foreach(Order order1 in customer2.CustomerOrders)
      {
         treeView1.Nodes[customerArray.IndexOf(customer2)].Nodes.Add(
           new TreeNode(customer2.CustomerName + "." + order1.OrderID));
      }
   }

   // Reset the cursor to the default for all controls.
   Cursor.Current = Cursors.Default;

   // Begin repainting the TreeView.
   treeView1.EndUpdate();
}
Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

備註

AddRemoveRemoveAt 方法可讓您新增和移除集合中的個別樹狀節點。

注意

不支援列舉集合和移除節點。

您也可以使用 AddRangeClear 方法來新增或移除集合中的所有樹狀節點。

類別無法繼承自 TreeNodeCollection 類別。

屬性

Count

取得集合中的 TreeNode 物件總數。

IsReadOnly

取得值,表示集合是否為唯讀。

Item[Int32]

取得或設定在集合的指定索引處的 TreeNode

Item[String]

從集合中取得具有指定索引鍵的樹狀節點。

方法

Add(String)

將含有指定標籤文字的新樹狀節點加入至目前樹狀節點集合的尾端。

Add(String, String)

使用指定的索引鍵和文字建立新的樹狀節點,並將它加入至集合中。

Add(String, String, Int32)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它加入至集合中。

Add(String, String, Int32, Int32)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它加入至集合中。

Add(String, String, String)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它加入至集合中。

Add(String, String, String, String)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它加入至集合中。

Add(TreeNode)

將先前建立的樹狀節點加入至樹狀節點集合中的尾端。

AddRange(TreeNode[])

將先前建立的樹狀節點陣列加入集合中。

Clear()

從集合中移除所有樹狀節點。

Contains(TreeNode)

判斷指定的樹狀節點是否為集合的成員。

ContainsKey(String)

判斷集合是否包含具有指定索引鍵的樹狀節點。

CopyTo(Array, Int32)

將整個集合複製到現有陣列中的指定位置。

Equals(Object)

判斷指定的物件是否等於目前的物件。

(繼承來源 Object)
Find(String, Boolean)

尋找具有指定索引鍵的樹狀節點,選擇性搜尋子節點。

GetEnumerator()

傳回列舉值,可用來逐一查看樹狀節點集合。

GetHashCode()

做為預設雜湊函式。

(繼承來源 Object)
GetType()

取得目前執行個體的 Type

(繼承來源 Object)
IndexOf(TreeNode)

傳回集合中指定樹狀節點的索引。

IndexOfKey(String)

傳回具有指定索引鍵的第一個樹狀節點之索引。

Insert(Int32, String)

使用指定的文字建立樹狀節點,並將它插入指定的索引處。

Insert(Int32, String, String)

使用指定的文字和索引鍵建立樹狀節點,並將它插入集合中。

Insert(Int32, String, String, Int32)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它插入指定索引處的集合中。

Insert(Int32, String, String, Int32, Int32)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它插入指定索引處的集合中。

Insert(Int32, String, String, String)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它插入指定索引處的集合中。

Insert(Int32, String, String, String, String)

使用指定的索引鍵、文字和影像建立樹狀節點,並將它插入指定索引處的集合中。

Insert(Int32, TreeNode)

在樹狀節點集合中的指定位置插入現有樹狀節點。

MemberwiseClone()

建立目前 Object 的淺層複製。

(繼承來源 Object)
Remove(TreeNode)

從樹狀節點集合中移除指定的樹狀節點。

RemoveAt(Int32)

從樹狀節點集合的指定索引處移除樹狀節點。

RemoveByKey(String)

從集合中移除具有指定索引鍵的樹狀節點。

ToString()

傳回代表目前物件的字串。

(繼承來源 Object)

明確介面實作

ICollection.IsSynchronized

取得值,表示是否同步化存取集合 (執行緒安全)。

ICollection.SyncRoot

取得物件,這個物件可以用來對集合進行同步存取。

IList.Add(Object)

將物件加入至樹狀節點集合的尾端。

IList.Contains(Object)

判斷指定的樹狀節點是否為集合的成員。

IList.IndexOf(Object)

傳回集合中指定樹狀節點的索引。

IList.Insert(Int32, Object)

在樹狀節點集合中的指定位置插入現有樹狀節點。

IList.IsFixedSize

取得值,指出樹狀節點集合是否具有固定大小。

IList.Item[Int32]

取得或設定位於集合中指定索引處的樹狀節點。

IList.Remove(Object)

從樹狀節點集合中移除指定的樹狀節點。

擴充方法

Cast<TResult>(IEnumerable)

IEnumerable 的項目轉換成指定的型別。

OfType<TResult>(IEnumerable)

根據指定的型別來篩選 IEnumerable 的項目。

AsParallel(IEnumerable)

啟用查詢的平行化作業。

AsQueryable(IEnumerable)

IEnumerable 轉換成 IQueryable

適用於

另請參閱