TreeNodeCollection 類別

定義

表示 TreeNode 物件的集合。Represents a collection of TreeNode objects.

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 TreeView 控制項中顯示客戶資訊。The following code example displays customer information in a TreeView control. 根樹狀節點會顯示客戶名稱,而子樹狀節點則會顯示指派給每個客戶的訂單號碼。The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. 在此範例中,1000客戶會以15個訂單顯示。In this example, 1,000 customers are displayed with 15 orders each. TreeView 的重新繪製會使用 BeginUpdateEndUpdate 方法來隱藏,而且當 TreeView 建立並繪製 TreeNode 物件時,會顯示等候 CursorThe repainting of the TreeView is suppressed by using the BeginUpdate and EndUpdate methods, and a wait Cursor is displayed while the TreeView creates and paints the TreeNode objects. 這個範例需要您擁有可保存 Order 物件集合的 Customer 物件。This example requires that you have a Customer object that can hold a collection of Order objects. 您也需要在 Form上建立 TreeView 控制項的實例。It also requires that you have created an instance of a TreeView control on a Form.

// 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

[Add]、[Remove] 和 [RemoveAt] 方法可讓您從集合中新增和移除個別的樹狀節點。The Add, Remove, and RemoveAt methods enable you to add and remove individual tree nodes from the collection.

注意

不支援列舉集合和移除節點。Enumerating the collection and removing nodes is not supported.

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。You can also use the AddRange or Clear methods to add or remove all the tree nodes from the collection.

類別無法繼承自 TreeNodeCollection 類別。Classes cannot inherit from the TreeNodeCollection class.

屬性

Count

取得集合中的 TreeNode 物件總數。Gets the total number of TreeNode objects in the collection.

IsReadOnly

取得值,指出集合是否為唯讀。Gets a value indicating whether the collection is read-only.

Item[Int32]

取得或設定在集合的指定索引處的 TreeNodeGets or sets the TreeNode at the specified indexed location in the collection.

Item[String]

從集合中取得具有指定索引鍵的樹狀節點。Gets the tree node with the specified key from the collection.

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。Adds a new tree node with the specified label text to the end of the current tree node collection.

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。Creates a new tree node with the specified key and text, and adds it to the collection.

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。Creates a tree node with the specified key, text, and image, and adds it to the collection.

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。Creates a tree node with the specified key, text, and images, and adds it to the collection.

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。Creates a tree node with the specified key, text, and image, and adds it to the collection.

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。Creates a tree node with the specified key, text, and images, and adds it to the collection.

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。Adds a previously created tree node to the end of the tree node collection.

AddRange(TreeNode[])

將先前建立的樹狀節點陣列加入集合中。Adds an array of previously created tree nodes to the collection.

Clear()

從集合中移除所有樹狀節點。Removes all tree nodes from the collection.

Contains(TreeNode)

判斷指定的樹狀節點是否為集合的成員。Determines whether the specified tree node is a member of the collection.

ContainsKey(String)

判斷集合是否包含具有指定索引鍵的樹狀節點。Determines whether the collection contains a tree node with the specified key.

CopyTo(Array, Int32)

將整個集合複製到現有陣列中的指定位置。Copies the entire collection into an existing array at a specified location within the array.

Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(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。Finds the tree nodes with specified key, optionally searching subnodes.

GetEnumerator()

傳回列舉值,可用來逐一查看樹狀節點集合。Returns an enumerator that can be used to iterate through the tree node collection.

GetHashCode()

作為預設雜湊函數。Serves as the default hash function.

(繼承來源 Object)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
IndexOf(TreeNode)

傳回集合中指定樹狀節點的索引。Returns the index of the specified tree node in the collection.

IndexOfKey(String)

傳回具有指定索引鍵的第一個樹狀節點之索引。Returns the index of the first occurrence of a tree node with the specified key.

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。Creates a tree node with the specified text and inserts it at the specified index.

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。Creates a tree node with the specified text and key, and inserts it into the collection.

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。Creates a tree node with the specified key, text, and image, and inserts it into the collection at the specified index.

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。Creates a tree node with the specified key, text, and images, and inserts it into the collection at the specified index.

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。Creates a tree node with the specified key, text, and image, and inserts it into the collection at the specified index.

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。Creates a tree node with the specified key, text, and images, and inserts it into the collection at the specified index.

Insert(Int32, TreeNode)

在樹狀節點集合中的指定位置插入現有樹狀節點。Inserts an existing tree node into the tree node collection at the specified location.

MemberwiseClone()

建立目前 Object 的淺層複本 (Shallow Copy)。Creates a shallow copy of the current Object.

(繼承來源 Object)
Remove(TreeNode)

從樹狀節點集合中移除指定的樹狀節點。Removes the specified tree node from the tree node collection.

RemoveAt(Int32)

從樹狀節點集合的指定索引處移除樹狀節點。Removes a tree node from the tree node collection at a specified index.

RemoveByKey(String)

從集合中移除具有指定索引鍵的樹狀節點。Removes the tree node with the specified key from the collection.

ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(繼承來源 Object)

明確介面實作

ICollection.IsSynchronized

取得值,指出是否同步存取集合 (安全執行緒)。Gets a value indicating whether access to the collection is synchronized (thread safe).

ICollection.SyncRoot

取得物件,這個物件可以用來對集合進行同步存取。Gets an object that can be used to synchronize access to the collection.

IList.Add(Object)

將物件加入至樹狀節點集合的尾端。Adds an object to the end of the tree node collection.

IList.Contains(Object)

判斷指定的樹狀節點是否為集合的成員。Determines whether the specified tree node is a member of the collection.

IList.IndexOf(Object)

傳回集合中指定樹狀節點的索引。Returns the index of the specified tree node in the collection.

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。Inserts an existing tree node in the tree node collection at the specified location.

IList.IsFixedSize

取得值,指出樹狀節點集合是否具有固定大小。Gets a value indicating whether the tree node collection has a fixed size.

IList.Item[Int32]

取得或設定位於集合中指定索引處的樹狀節點。Gets or sets the tree node at the specified index in the collection.

IList.Remove(Object)

從樹狀節點集合中移除指定的樹狀節點。Removes the specified tree node from the tree node collection.

擴充方法

Cast<TResult>(IEnumerable)

IEnumerable 的項目轉換成指定的型別。Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable)

根據指定的型別來篩選 IEnumerable 的項目。Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable)

啟用查詢的平行化作業。Enables parallelization of a query.

AsQueryable(IEnumerable)

IEnumerable 轉換成 IQueryableConverts an IEnumerable to an IQueryable.

適用於

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