TreeNodeCollection TreeNodeCollection TreeNodeCollection TreeNodeCollection Class

定义

表示 TreeNode 对象集合。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
继承
TreeNodeCollectionTreeNodeCollectionTreeNodeCollectionTreeNodeCollection
实现

示例

下面的代码示例在TreeView控件中显示客户信息。The following code example displays customer information in a TreeView control. 根树节点显示客户名称, 子树节点显示分配给每个客户的订单号。The root tree nodes display customer names, and the child tree nodes display the order numbers assigned to each customer. 在此示例中, 1000 客户显示每个订单15个订单。In this example, 1,000 customers are displayed with 15 orders each. TreeView TreeView Cursor TreeNode使用和方法EndUpdate可取消重画, 并在创建和绘制对象时显示等待。 BeginUpdateThe 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. 此示例要求您有一个Customer可以保存Order对象集合的对象。This example requires that you have a Customer object that can hold a collection of Order objects. 它还要求您已TreeView Form在上创建了控件的实例。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 'End Customer 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 ' End Order 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

注解

使用AddRemoveRemoveAt方法可以在集合中添加和移除单个树节点。The Add, Remove, and RemoveAt methods enable you to add and remove individual tree nodes from the collection.

备注

不支持枚举集合和删除节点。Enumerating the collection and removing nodes is not supported.

你还可以使用AddRangeClear方法来添加或删除集合中的所有树节点。You can also use the AddRange or Clear methods to add or remove all the tree nodes from the collection.

类不能从TreeNodeCollection类继承。Classes cannot inherit from the TreeNodeCollection class.

属性

Count Count Count Count

获取集合中 TreeNode 对象的总数。Gets the total number of TreeNode objects in the collection.

IsReadOnly IsReadOnly IsReadOnly IsReadOnly

获取一个值,该值指示集合是否为只读。Gets a value indicating whether the collection is read-only.

Item[Int32] Item[Int32] Item[Int32] Item[Int32]

获取或设置位于集合中指定索引位置处的 TreeNodeGets or sets the TreeNode at the specified indexed location in the collection.

Item[String] Item[String] Item[String] Item[String]

获取集合中具有指定键的树节点。Gets the tree node with the specified key from the collection.

方法

Add(String) Add(String) Add(String) Add(String)

将具有指定标签文本的新树节点添加到当前树节点集合的末尾。Adds a new tree node with the specified label text to the end of the current tree node collection.

Add(String, String) Add(String, String) Add(String, String) Add(String, String)

创建具有指定键和文本的新树节点,并将其添加到集合中。Creates a new tree node with the specified key and text, and adds it to the collection.

Add(String, String, Int32) Add(String, String, Int32) Add(String, String, Int32) Add(String, String, Int32)

创建具有指定键、文本和图像的树节点,并将其添加到集合中。Creates a tree node with the specified key, text, and image, and adds it to the collection.

Add(String, String, Int32, Int32) Add(String, String, Int32, Int32) Add(String, String, Int32, Int32) Add(String, String, Int32, Int32)

创建具有指定键、文本和图像的树节点,并将其添加到集合中。Creates a tree node with the specified key, text, and images, and adds it to the collection.

Add(String, String, String) Add(String, String, String) Add(String, String, String) Add(String, String, String)

创建具有指定键、文本和图像的树节点,并将其添加到集合中。Creates a tree node with the specified key, text, and image, and adds it to the collection.

Add(String, String, String, String) Add(String, String, String, String) Add(String, String, String, String) Add(String, String, String, String)

创建具有指定键、文本和图像的树节点,并将其添加到集合中。Creates a tree node with the specified key, text, and images, and adds it to the collection.

Add(TreeNode) Add(TreeNode) Add(TreeNode) Add(TreeNode)

将先前创建的树节点添加到树节点集合的末尾。Adds a previously created tree node to the end of the tree node collection.

AddRange(TreeNode[]) AddRange(TreeNode[]) AddRange(TreeNode[]) AddRange(TreeNode[])

将先前创建的一组树节点添加到集合中。Adds an array of previously created tree nodes to the collection.

Clear() Clear() Clear() Clear()

从集合中删除所有树节点。Removes all tree nodes from the collection.

Contains(TreeNode) Contains(TreeNode) Contains(TreeNode) Contains(TreeNode)

确定指定的树节点是否为集合的成员。Determines whether the specified tree node is a member of the collection.

ContainsKey(String) ContainsKey(String) ContainsKey(String) ContainsKey(String)

确定集合是否包含具有指定键的树节点。Determines whether the collection contains a tree node with the specified key.

CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32)

将整个集合复制到现有数组中,从该数组内的指定位置开始复制。Copies the entire collection into an existing array at a specified location within the array.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(Inherited from Object)
Find(String, Boolean) Find(String, Boolean) Find(String, Boolean) Find(String, Boolean)

查找具有指定键的树节点,可以选择搜索子节点。Finds the tree nodes with specified key, optionally searching subnodes.

GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

返回可用于循环访问树节点集合的枚举数。Returns an enumerator that can be used to iterate through the tree node collection.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
IndexOf(TreeNode) IndexOf(TreeNode) IndexOf(TreeNode) IndexOf(TreeNode)

返回集合中指定树节点的索引。Returns the index of the specified tree node in the collection.

IndexOfKey(String) IndexOfKey(String) IndexOfKey(String) IndexOfKey(String)

返回具有指定键的首个树节点的索引。Returns the index of the first occurrence of a tree node with the specified key.

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

创建具有指定文本的树节点,并将其插入指定索引处。Creates a tree node with the specified text and inserts it at the specified index.

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

创建具有指定文本和键的树节点,并将其插入集合中。Creates a tree node with the specified text and key, and inserts it into the collection.

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

创建具有指定键、文本和图像的树节点,并将其插入集合中的指定索引处。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) Insert(Int32, String, String, Int32, Int32) Insert(Int32, String, String, Int32, Int32) Insert(Int32, String, String, Int32, Int32)

创建具有指定键、文本和图像的树节点,并将其插入集合中的指定索引处。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) Insert(Int32, String, String, String) Insert(Int32, String, String, String) Insert(Int32, String, String, String)

创建具有指定键、文本和图像的树节点,并将其插入集合中的指定索引处。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) Insert(Int32, String, String, String, String) Insert(Int32, String, String, String, String) Insert(Int32, String, String, String, String)

创建具有指定键、文本和图像的树节点,并将其插入集合中的指定索引处。Creates a tree node with the specified key, text, and images, and inserts it into the collection at the specified index.

Insert(Int32, TreeNode) Insert(Int32, TreeNode) Insert(Int32, TreeNode) Insert(Int32, TreeNode)

在树节点集合中的指定位置插入现有树节点。Inserts an existing tree node into the tree node collection at the specified location.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
Remove(TreeNode) Remove(TreeNode) Remove(TreeNode) Remove(TreeNode)

从树节点集合中移除指定的树节点。Removes the specified tree node from the tree node collection.

RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32)

从树节点集合的指定索引处移除树节点。Removes a tree node from the tree node collection at a specified index.

RemoveByKey(String) RemoveByKey(String) RemoveByKey(String) RemoveByKey(String)

从集合中移除具有指定键的树节点。Removes the tree node with the specified key from the collection.

ToString() ToString() ToString() ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(Inherited from Object)

显式界面实现

ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized

获取一个值,该值指示对集合的访问是否为同步的(线程安全)。Gets a value indicating whether access to the collection is synchronized (thread safe).

ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot

获取可用于同步对集合的访问的对象。Gets an object that can be used to synchronize access to the collection.

IList.Add(Object) IList.Add(Object) IList.Add(Object) IList.Add(Object)

将对象添加到树节点集合的末尾。Adds an object to the end of the tree node collection.

IList.Contains(Object) IList.Contains(Object) IList.Contains(Object) IList.Contains(Object)

确定指定的树节点是否为集合的成员。Determines whether the specified tree node is a member of the collection.

IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object)

返回集合中指定树节点的索引。Returns the index of the specified tree node in the collection.

IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object)

在树节点集合中的指定位置插入现有树节点。Inserts an existing tree node in the tree node collection at the specified location.

IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize

获取一个值,该值指示树节点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] IList.Item[Int32] IList.Item[Int32] IList.Item[Int32]

获取或设置集合中指定索引处的树节点。Gets or sets the tree node at the specified index in the collection.

IList.Remove(Object) IList.Remove(Object) IList.Remove(Object) IList.Remove(Object)

从树节点集合中移除指定的树节点。Removes the specified tree node from the tree node collection.

扩展方法

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

IEnumerable 的元素强制转换为指定的类型。Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

根据指定类型筛选 IEnumerable 的元素。Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

启用查询的并行化。Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

IEnumerable 转换为 IQueryableConverts an IEnumerable to an IQueryable.

适用于

另请参阅