TreeNodeCollection.Add 方法

参考

定义

命名空间:: System.Windows.Forms

程序集:: System.Windows.Forms.dll

重要

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在集合中添加新的树节点。

重载

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。
Add(TreeNode)	将先前创建的树节点添加到树节点集合的末尾。
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。
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。
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。
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。
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。

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ text);

public virtual System.Windows.Forms.TreeNode Add (string text);

public virtual System.Windows.Forms.TreeNode Add (string? text);

abstract member Add : string -> System.Windows.Forms.TreeNode
override this.Add : string -> System.Windows.Forms.TreeNode

Public Overridable Function Add (text As String) As TreeNode

参数

text: String

TreeNode 显示的标签文本。

TreeNode

表示添加到集合中的树节点的 TreeNode。

示例

下面的代码示例在控件中 TreeView 显示客户信息。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。在此示例中，将显示 1，000 个客户，每个客户有 15 个订单。使用和方法取消重绘TreeView，并在创建和绘制TreeNode对象时TreeView显示等待Cursor。EndUpdate BeginUpdate 此示例要求你有一个 Customer 可以保存对象集合的 Order 对象。它还要求已在上Form创建了控件的TreeView实例。

// 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

注解

还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

若要删除 TreeNode 之前添加的 Remove，请使用、 RemoveAt或 Clear 方法。

另请参阅

适用于

Add(TreeNode)

将先前创建的树节点添加到树节点集合的末尾。

public:
 virtual int Add(System::Windows::Forms::TreeNode ^ node);

public virtual int Add (System.Windows.Forms.TreeNode node);

abstract member Add : System.Windows.Forms.TreeNode -> int
override this.Add : System.Windows.Forms.TreeNode -> int

Public Overridable Function Add (node As TreeNode) As Integer

参数

node: TreeNode

要添加到集合中的 TreeNode。

Int32

添加到树节点集合中的 TreeNode 的从零开始的索引值。

例外

ArgumentException

node 目前分配给了另一个 TreeView。

示例

// 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

注解

此版本的 Add 方法允许您将以前创建 TreeNode 的对象添加到树节点集合的末尾。

还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

若要删除 TreeNode 之前添加的 Remove，请使用、 RemoveAt或 Clear 方法。

注意

一 TreeNode 次只能将分配给一个 TreeView 控件。若要将树节点添加到新的树视图控件，必须先将其从另一个树视图中删除或克隆它。

另请参阅

适用于

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text);

public virtual System.Windows.Forms.TreeNode Add (string key, string text);

public virtual System.Windows.Forms.TreeNode Add (string? key, string? text);

abstract member Add : string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string -> System.Windows.Forms.TreeNode

Public Overridable Function Add (key As String, text As String) As TreeNode

参数

key: String

树节点的名称。

text: String

要在树节点中显示的文本。

TreeNode

已添加到集合中的 TreeNode。

注解

属性Name对应于中 TreeNodeCollection的TreeNode键。

还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

适用于

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, int imageIndex);

public virtual System.Windows.Forms.TreeNode Add (string key, string text, int imageIndex);

public virtual System.Windows.Forms.TreeNode Add (string? key, string? text, int imageIndex);

abstract member Add : string * string * int -> System.Windows.Forms.TreeNode
override this.Add : string * string * int -> System.Windows.Forms.TreeNode

Public Overridable Function Add (key As String, text As String, imageIndex As Integer) As TreeNode

参数

key: String

树节点的名称。

text: String

要在树节点中显示的文本。

imageIndex: Int32

要在树节点中显示的图像的索引。

TreeNode

已添加到集合中的 TreeNode。

注解

属性Name对应于中 TreeNodeCollection的TreeNode键。

参数imageIndex引用父 TreeView的属性中的ImageList图像。

树节点将添加到集合的末尾。还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

适用于

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, System::String ^ imageKey);

public virtual System.Windows.Forms.TreeNode Add (string key, string text, string imageKey);

public virtual System.Windows.Forms.TreeNode Add (string? key, string? text, string? imageKey);

abstract member Add : string * string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string * string -> System.Windows.Forms.TreeNode

Public Overridable Function Add (key As String, text As String, imageKey As String) As TreeNode

参数

key: String

树节点的名称。

text: String

要在树节点中显示的文本。

imageKey: String

要在树节点中显示的图像。

TreeNode

已添加到集合中的 TreeNode。

注解

属性Name对应于中 TreeNodeCollection的TreeNode键。

树节点将添加到集合的末尾。还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

参数imageKey引用父 TreeView的属性中的ImageList图像。

适用于

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, int imageIndex, int selectedImageIndex);

public virtual System.Windows.Forms.TreeNode Add (string key, string text, int imageIndex, int selectedImageIndex);

public virtual System.Windows.Forms.TreeNode Add (string? key, string? text, int imageIndex, int selectedImageIndex);

abstract member Add : string * string * int * int -> System.Windows.Forms.TreeNode
override this.Add : string * string * int * int -> System.Windows.Forms.TreeNode

Public Overridable Function Add (key As String, text As String, imageIndex As Integer, selectedImageIndex As Integer) As TreeNode

参数

key: String

树节点的名称。

text: String

要在树节点中显示的文本。

imageIndex: Int32

要在树节点中显示的图像的索引。

selectedImageIndex: Int32

处于选定状态时要在树节点中显示的图像的索引。

TreeNode

已添加到集合中的树节点。

注解

属性Name对应于中 TreeNodeCollection的TreeNode键。

树节点将添加到集合的末尾。还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

参数imageIndex引用父 TreeView的属性中的ImageList图像。

参数selectedImageIndex引用父 TreeView的属性中的StateImageList图像。

适用于

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。

public:
 virtual System::Windows::Forms::TreeNode ^ Add(System::String ^ key, System::String ^ text, System::String ^ imageKey, System::String ^ selectedImageKey);

public virtual System.Windows.Forms.TreeNode Add (string key, string text, string imageKey, string selectedImageKey);

public virtual System.Windows.Forms.TreeNode Add (string? key, string? text, string? imageKey, string? selectedImageKey);

abstract member Add : string * string * string * string -> System.Windows.Forms.TreeNode
override this.Add : string * string * string * string -> System.Windows.Forms.TreeNode

Public Overridable Function Add (key As String, text As String, imageKey As String, selectedImageKey As String) As TreeNode

参数

key: String

树节点的名称。

text: String

要在树节点中显示的文本。

imageKey: String

要在树节点中显示的图像的键。

selectedImageKey: String

节点处于选定状态时要显示的图像的键。

TreeNode

已添加到集合中的 TreeNode。

注解

属性Name对应于中 TreeNodeCollection的TreeNode键。

树节点将添加到集合的末尾。还可以使用 AddRange 或 Insert 方法向集合添加新TreeNode对象。

参数imageKey引用父 TreeView的属性中的ImageList图像。

参数selectedImageKey引用父 TreeView的属性中的StateImageList图像。

适用于

TreeNodeCollection.Add 方法

定义

重载

Add(String)

参数

返回

示例

注解

另请参阅

适用于

Add(TreeNode)

参数

返回

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Add(String, String, Int32)

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Add(String, String, String)

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Add(String, String, Int32, Int32)

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Add(String, String, String, String)

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