TreeNode 构造函数
定义
重要
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初始化 TreeNode 类的新实例。
重载
| TreeNode() |
初始化 TreeNode 类的新实例。 |
| TreeNode(String) |
用指定的标签文本初始化 TreeNode 类的新实例。 |
| TreeNode(SerializationInfo, StreamingContext) |
使用指定的序列化信息和上下文初始化 TreeNode 类的新实例。 |
| TreeNode(String, TreeNode[]) |
用指定的标签文本和子树节点初始化 TreeNode 类的新实例。 |
| TreeNode(String, Int32, Int32) |
用指定的标签文本以及树节点处于选定和未选定状态时所显示的图像来初始化 TreeNode 类的新实例。 |
| TreeNode(String, Int32, Int32, TreeNode[]) |
用指定的标签文本、子树节点以及树节点处于选定和未选定状态时所显示的图像来初始化 TreeNode 类的新实例。 |
TreeNode()
初始化 TreeNode 类的新实例。
public:
TreeNode();public TreeNode ();Public Sub New ()示例
下面的代码示例创建一个根树节点，以向其分配子树节点。 每个对象的ArrayList子树节点Customer将添加到根树节点，以及分配给Customer该对象的每个Order对象的子树节点。 对象 Customer 分配给 Tag 该属性，表示对象的树节点 Customer 以 Orange 文本显示。 此示例要求你已定义一个Customer和Order对象、一个FormTreeView控件以及一个ArrayList包含Customer对象的命名customerArray对象。
ref class Customer
{
public:
ArrayList^ CustomerOrders;
String^ CustomerName;
Customer( String^ myName )
{
CustomerName = myName;
CustomerOrders = gcnew ArrayList;
}
};
ref class Order
{
public:
String^ OrderID;
Order( String^ myOrderID )
{
this->OrderID = myOrderID;
}
};
void AddRootNodes()
{
// Add a root node to assign the customer nodes to.
TreeNode^ rootNode = gcnew TreeNode;
rootNode->Text = "CustomerList";
// Add a main root treenode.
myTreeView->Nodes->Add( rootNode );
// Add a root treenode for each 'Customer' object in the ArrayList.
IEnumerator^ myEnum = customerArray->GetEnumerator();
while ( myEnum->MoveNext() )
{
Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
// Add a child treenode for each Order object.
int i = 0;
array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(5);
IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
while ( myEnum->MoveNext() )
{
Order^ myOrder = safe_cast<Order^>(myEnum->Current);
myTreeNodeArray[ i ] = gcnew TreeNode( myOrder->OrderID );
i++;
}
TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,myTreeNodeArray );
// Display the customer names with and Orange font.
customerNode->ForeColor = Color::Orange;
// Store the Customer Object* in the Tag property of the TreeNode.
customerNode->Tag = myCustomer;
myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
}
}
public class Customer
{
public ArrayList CustomerOrders;
public string CustomerName;
public Customer(string myName)
{
CustomerName = myName;
CustomerOrders = new ArrayList();
}
}
public class Order
{
public string OrderID;
public Order(string myOrderID )
{
this.OrderID = myOrderID;
}
}
public void AddRootNodes()
{
// Add a root node to assign the customer nodes to.
TreeNode rootNode = new TreeNode();
rootNode.Text = "CustomerList";
// Add a main root treenode.
myTreeView.Nodes.Add(rootNode);
// Add a root treenode for each 'Customer' object in the ArrayList.
foreach(Customer myCustomer in customerArray)
{
// Add a child treenode for each Order object.
int i = 0;
TreeNode[] myTreeNodeArray = new TreeNode[5];
foreach(Order myOrder in myCustomer.CustomerOrders)
{
myTreeNodeArray[i] = new TreeNode(myOrder.OrderID);
i++;
}
TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
myTreeNodeArray);
// Display the customer names with and Orange font.
customerNode.ForeColor = Color.Orange;
// Store the Customer object in the Tag property of the TreeNode.
customerNode.Tag = myCustomer;
myTreeView.Nodes[0].Nodes.Add(customerNode);
}
}
Public Class Customer
Public CustomerOrders As ArrayList
Public CustomerName As String
Public Sub New(myName As String)
CustomerName = myName
CustomerOrders = New ArrayList()
End Sub
End Class
Public Class Order
Public OrderID As String
Public Sub New(myOrderID As String)
Me.OrderID = myOrderID
End Sub
End Class
Public Sub AddRootNodes()
' Add a root node to assign the customer nodes to.
Dim rootNode As TreeNode
rootNode = New TreeNode()
rootNode.Text = "CustomerList"
' Add a main root treenode.
myTreeView.Nodes.Add(rootNode)
' Add a root treenode for each Customer object in the ArrayList.
Dim myCustomer As Customer
For Each myCustomer In customerArray
' Add a child treenode for each Order object.
Dim i As Integer = 0
Dim myTreeNodeArray(4) As TreeNode
Dim myOrder As Order
For Each myOrder In myCustomer.CustomerOrders
myTreeNodeArray(i) = New TreeNode(myOrder.OrderID)
i += 1
Next myOrder
Dim customerNode As New TreeNode(myCustomer.CustomerName, _
myTreeNodeArray)
' Display the customer names with and Orange font.
customerNode.ForeColor = Color.Orange
' Store the Customer object in the Tag property of the TreeNode.
customerNode.Tag = myCustomer
myTreeView.Nodes(0).Nodes.Add(customerNode)
Next myCustomer
End Sub
另请参阅
适用于
TreeNode(String)
用指定的标签文本初始化 TreeNode 类的新实例。
public:
TreeNode(System::String ^ text);public TreeNode (string text);new System.Windows.Forms.TreeNode : string -> System.Windows.Forms.TreeNodePublic Sub New (text As String)参数
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，每个客户显示 1，000 个订单 15 个。 通过使用和方法取消重新绘制，TreeView在创建和绘制TreeNode对象时TreeView会显示等待Cursor。BeginUpdate EndUpdate 此示例要求你有一个 Customer 可以保存对象集合 Order 的对象。 它还要求你在控件Form上创建了控件TreeView的实例。
// 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
参数 text 值分配给节点 Text 的属性，并成为树节点标签。
另请参阅
适用于
TreeNode(SerializationInfo, StreamingContext)
使用指定的序列化信息和上下文初始化 TreeNode 类的新实例。
protected:
TreeNode(System::Runtime::Serialization::SerializationInfo ^ serializationInfo, System::Runtime::Serialization::StreamingContext context);protected TreeNode (System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext context);new System.Windows.Forms.TreeNode : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Windows.Forms.TreeNodeProtected Sub New (serializationInfo As SerializationInfo, context As StreamingContext)参数
- serializationInfo
- SerializationInfo
一个 SerializationInfo，其中包含用来反序列化类的数据。
- context
- StreamingContext
一个 StreamingContext，其中包含序列化流的源和目标。
适用于
TreeNode(String, TreeNode[])
用指定的标签文本和子树节点初始化 TreeNode 类的新实例。
public:
TreeNode(System::String ^ text, cli::array <System::Windows::Forms::TreeNode ^> ^ children);public TreeNode (string text, System.Windows.Forms.TreeNode[] children);new System.Windows.Forms.TreeNode : string * System.Windows.Forms.TreeNode[] -> System.Windows.Forms.TreeNodePublic Sub New (text As String, children As TreeNode())参数
示例
下面的代码示例创建一个根树节点，以向其分配子树节点。 每个对象的ArrayList子树节点Customer将添加到根树节点，以及分配给Customer该对象的每个Order对象的子树节点。 对象 Customer 分配给 Tag 该属性，表示对象的树节点 Customer 以 Orange 文本显示。 此示例要求你已定义一个Customer和Order对象、一个FormTreeView控件以及一个ArrayList包含Customer对象的命名customerArray对象。
ref class Customer
{
public:
ArrayList^ CustomerOrders;
String^ CustomerName;
Customer( String^ myName )
{
CustomerName = myName;
CustomerOrders = gcnew ArrayList;
}
};
ref class Order
{
public:
String^ OrderID;
Order( String^ myOrderID )
{
this->OrderID = myOrderID;
}
};
void AddRootNodes()
{
// Add a root node to assign the customer nodes to.
TreeNode^ rootNode = gcnew TreeNode;
rootNode->Text = "CustomerList";
// Add a main root treenode.
myTreeView->Nodes->Add( rootNode );
// Add a root treenode for each 'Customer' object in the ArrayList.
IEnumerator^ myEnum = customerArray->GetEnumerator();
while ( myEnum->MoveNext() )
{
Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
// Add a child treenode for each Order object.
int i = 0;
array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(5);
IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
while ( myEnum->MoveNext() )
{
Order^ myOrder = safe_cast<Order^>(myEnum->Current);
myTreeNodeArray[ i ] = gcnew TreeNode( myOrder->OrderID );
i++;
}
TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,myTreeNodeArray );
// Display the customer names with and Orange font.
customerNode->ForeColor = Color::Orange;
// Store the Customer Object* in the Tag property of the TreeNode.
customerNode->Tag = myCustomer;
myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
}
}
public class Customer
{
public ArrayList CustomerOrders;
public string CustomerName;
public Customer(string myName)
{
CustomerName = myName;
CustomerOrders = new ArrayList();
}
}
public class Order
{
public string OrderID;
public Order(string myOrderID )
{
this.OrderID = myOrderID;
}
}
public void AddRootNodes()
{
// Add a root node to assign the customer nodes to.
TreeNode rootNode = new TreeNode();
rootNode.Text = "CustomerList";
// Add a main root treenode.
myTreeView.Nodes.Add(rootNode);
// Add a root treenode for each 'Customer' object in the ArrayList.
foreach(Customer myCustomer in customerArray)
{
// Add a child treenode for each Order object.
int i = 0;
TreeNode[] myTreeNodeArray = new TreeNode[5];
foreach(Order myOrder in myCustomer.CustomerOrders)
{
myTreeNodeArray[i] = new TreeNode(myOrder.OrderID);
i++;
}
TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
myTreeNodeArray);
// Display the customer names with and Orange font.
customerNode.ForeColor = Color.Orange;
// Store the Customer object in the Tag property of the TreeNode.
customerNode.Tag = myCustomer;
myTreeView.Nodes[0].Nodes.Add(customerNode);
}
}
Public Class Customer
Public CustomerOrders As ArrayList
Public CustomerName As String
Public Sub New(myName As String)
CustomerName = myName
CustomerOrders = New ArrayList()
End Sub
End Class
Public Class Order
Public OrderID As String
Public Sub New(myOrderID As String)
Me.OrderID = myOrderID
End Sub
End Class
Public Sub AddRootNodes()
' Add a root node to assign the customer nodes to.
Dim rootNode As TreeNode
rootNode = New TreeNode()
rootNode.Text = "CustomerList"
' Add a main root treenode.
myTreeView.Nodes.Add(rootNode)
' Add a root treenode for each Customer object in the ArrayList.
Dim myCustomer As Customer
For Each myCustomer In customerArray
' Add a child treenode for each Order object.
Dim i As Integer = 0
Dim myTreeNodeArray(4) As TreeNode
Dim myOrder As Order
For Each myOrder In myCustomer.CustomerOrders
myTreeNodeArray(i) = New TreeNode(myOrder.OrderID)
i += 1
Next myOrder
Dim customerNode As New TreeNode(myCustomer.CustomerName, _
myTreeNodeArray)
' Display the customer names with and Orange font.
customerNode.ForeColor = Color.Orange
' Store the Customer object in the Tag property of the TreeNode.
customerNode.Tag = myCustomer
myTreeView.Nodes(0).Nodes.Add(customerNode)
Next myCustomer
End Sub
注解
参数 text 值分配给节点 Text 的属性，并成为树节点标签。 数组中包含的 children 树节点将添加到 TreeNodeCollection 属性中存储的 Nodes 树节点。
另请参阅
适用于
TreeNode(String, Int32, Int32)
用指定的标签文本以及树节点处于选定和未选定状态时所显示的图像来初始化 TreeNode 类的新实例。
public:
TreeNode(System::String ^ text, int imageIndex, int selectedImageIndex);public TreeNode (string text, int imageIndex, int selectedImageIndex);new System.Windows.Forms.TreeNode : string * int * int -> System.Windows.Forms.TreeNodePublic Sub New (text As String, imageIndex As Integer, selectedImageIndex As Integer)参数
示例
下面的代码示例创建并分配给 ImageList 控件， TreeView 并使用对象填充 TreeView 控件 TreeNode 。 树节点是从树节点处于选定或未选中状态时显示的图像 ImageList 分配的。 此示例要求你有一个包含一TreeView个Form对象，一个ArrayList包含Customer每个对象Order的对象。 它还要求 Customer 定义和 Order 对象。
ref class Customer
{
public:
ArrayList^ CustomerOrders;
String^ CustomerName;
Customer( String^ myName )
{
CustomerName = myName;
CustomerOrders = gcnew ArrayList;
}
};
ref class Order
{
public:
String^ OrderID;
Order( String^ myOrderID )
{
this->OrderID = myOrderID;
}
};
void FillTreeView()
{
// Load the images in an ImageList.
ImageList^ myImageList = gcnew ImageList;
myImageList->Images->Add( Image::FromFile( "Default.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedDefault.gif" ) );
myImageList->Images->Add( Image::FromFile( "Root.gif" ) );
myImageList->Images->Add( Image::FromFile( "UnselectedCustomer.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedCustomer.gif" ) );
myImageList->Images->Add( Image::FromFile( "UnselectedOrder.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedOrder.gif" ) );
// Assign the ImageList to the TreeView.
myTreeView->ImageList = myImageList;
// Set the TreeView control's default image and selected image indexes.
myTreeView->ImageIndex = 0;
myTreeView->SelectedImageIndex = 1;
/* Set the index of image from the
ImageList for selected and unselected tree nodes.*/
this->rootImageIndex = 2;
this->selectedCustomerImageIndex = 3;
this->unselectedCustomerImageIndex = 4;
this->selectedOrderImageIndex = 5;
this->unselectedOrderImageIndex = 6;
// Create the root tree node.
TreeNode^ rootNode = gcnew TreeNode( "CustomerList" );
rootNode->ImageIndex = rootImageIndex;
rootNode->SelectedImageIndex = rootImageIndex;
// Add a main root tree node.
myTreeView->Nodes->Add( rootNode );
// Add a root tree node for each Customer object in the ArrayList.
IEnumerator^ myEnum = customerArray->GetEnumerator();
while ( myEnum->MoveNext() )
{
Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
// Add a child tree node for each Order object.
int countIndex = 0;
array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(myCustomer->CustomerOrders->Count);
IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
while ( myEnum->MoveNext() )
{
Order^ myOrder = safe_cast<Order^>(myEnum->Current);
// Add the Order tree node to the array.
myTreeNodeArray[ countIndex ] = gcnew TreeNode( myOrder->OrderID,unselectedOrderImageIndex,selectedOrderImageIndex );
countIndex++;
}
TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,unselectedCustomerImageIndex,selectedCustomerImageIndex,myTreeNodeArray );
myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
}
}
public class Customer
{
public ArrayList CustomerOrders;
public string CustomerName;
public Customer(string myName)
{
CustomerName = myName;
CustomerOrders = new ArrayList();
}
}
public class Order
{
public string OrderID;
public Order(string myOrderID )
{
this.OrderID = myOrderID;
}
}
private void FillTreeView()
{
// Load the images in an ImageList.
ImageList myImageList = new ImageList();
myImageList.Images.Add(Image.FromFile("Default.gif"));
myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"));
myImageList.Images.Add(Image.FromFile("Root.gif"));
myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"));
myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"));
myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"));
myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"));
// Assign the ImageList to the TreeView.
myTreeView.ImageList = myImageList;
// Set the TreeView control's default image and selected image indexes.
myTreeView.ImageIndex = 0;
myTreeView.SelectedImageIndex = 1;
/* Set the index of image from the
ImageList for selected and unselected tree nodes.*/
this.rootImageIndex = 2;
this.selectedCustomerImageIndex = 3;
this.unselectedCustomerImageIndex = 4;
this.selectedOrderImageIndex = 5;
this.unselectedOrderImageIndex = 6;
// Create the root tree node.
TreeNode rootNode = new TreeNode("CustomerList");
rootNode.ImageIndex = rootImageIndex;
rootNode.SelectedImageIndex = rootImageIndex;
// Add a main root tree node.
myTreeView.Nodes.Add(rootNode);
// Add a root tree node for each Customer object in the ArrayList.
foreach(Customer myCustomer in customerArray)
{
// Add a child tree node for each Order object.
int countIndex=0;
TreeNode[] myTreeNodeArray = new TreeNode[myCustomer.CustomerOrders.Count];
foreach(Order myOrder in myCustomer.CustomerOrders)
{
// Add the Order tree node to the array.
myTreeNodeArray[countIndex] = new TreeNode(myOrder.OrderID,
unselectedOrderImageIndex, selectedOrderImageIndex);
countIndex++;
}
// Add the Customer tree node.
TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray);
myTreeView.Nodes[0].Nodes.Add(customerNode);
}
}
Public Class Customer
Public CustomerOrders As ArrayList
Public CustomerName As String
Public Sub New(myName As String)
CustomerName = myName
CustomerOrders = New ArrayList()
End Sub
End Class
Public Class Order
Public OrderID As String
Public Sub New(myOrderID As String)
Me.OrderID = myOrderID
End Sub
End Class
Private Sub FillTreeView()
' Load the images in an ImageList.
Dim myImageList As New ImageList()
myImageList.Images.Add(Image.FromFile("Default.gif"))
myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"))
myImageList.Images.Add(Image.FromFile("Root.gif"))
myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"))
myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"))
myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"))
myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"))
' Assign the ImageList to the TreeView.
myTreeView.ImageList = myImageList
' Set the TreeView control's default image and selected image indexes.
myTreeView.ImageIndex = 0
myTreeView.SelectedImageIndex = 1
' Set the index of image from the
' ImageList for selected and unselected tree nodes.
Me.rootImageIndex = 2
Me.selectedCustomerImageIndex = 3
Me.unselectedCustomerImageIndex = 4
Me.selectedOrderImageIndex = 5
Me.unselectedOrderImageIndex = 6
' Create the root tree node.
Dim rootNode As New TreeNode("CustomerList")
rootNode.ImageIndex = rootImageIndex
rootNode.SelectedImageIndex = rootImageIndex
' Add a main root tree node.
myTreeView.Nodes.Add(rootNode)
' Add a root tree node for each Customer object in the ArrayList.
Dim myCustomer As Customer
For Each myCustomer In customerArray
' Add a child tree node for each Order object.
Dim countIndex As Integer = 0
Dim myTreeNodeArray(myCustomer.CustomerOrders.Count) As TreeNode
Dim myOrder As Order
For Each myOrder In myCustomer.CustomerOrders
' Add the Order tree node to the array.
myTreeNodeArray(countIndex) = New TreeNode(myOrder.OrderID, _
unselectedOrderImageIndex, selectedOrderImageIndex)
countIndex += 1
Next myOrder
' Add the Customer tree node.
Dim customerNode As New TreeNode(myCustomer.CustomerName, _
unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray)
myTreeView.Nodes(0).Nodes.Add(customerNode)
Next myCustomer
End Sub
注解
参数 text 值分配给节点 Text 的属性，并成为树节点标签。 值imageIndex``selectedImageIndex是分配给该属性的存储的TreeView.ImageListImageList索引值Image。 如果未选择树节点，则会显示属性中 imageIndex 引用的图像。 同样，当树节点处于选定状态时，将显示属性中 selectedImageIndex 引用的图像。
另请参阅
适用于
TreeNode(String, Int32, Int32, TreeNode[])
用指定的标签文本、子树节点以及树节点处于选定和未选定状态时所显示的图像来初始化 TreeNode 类的新实例。
public:
TreeNode(System::String ^ text, int imageIndex, int selectedImageIndex, cli::array <System::Windows::Forms::TreeNode ^> ^ children);public TreeNode (string text, int imageIndex, int selectedImageIndex, System.Windows.Forms.TreeNode[] children);new System.Windows.Forms.TreeNode : string * int * int * System.Windows.Forms.TreeNode[] -> System.Windows.Forms.TreeNodePublic Sub New (text As String, imageIndex As Integer, selectedImageIndex As Integer, children As TreeNode())参数
示例
下面的代码示例创建并分配给 ImageList 控件， TreeView 并使用对象填充 TreeView 控件 TreeNode 。 树节点是从树节点处于选定或未选中状态时显示的图像 ImageList 分配的。 此示例要求你有一个包含一TreeView个Form对象，一个ArrayList包含Customer每个对象Order的对象。 它还要求 Customer 定义和 Order 对象。
ref class Customer
{
public:
ArrayList^ CustomerOrders;
String^ CustomerName;
Customer( String^ myName )
{
CustomerName = myName;
CustomerOrders = gcnew ArrayList;
}
};
ref class Order
{
public:
String^ OrderID;
Order( String^ myOrderID )
{
this->OrderID = myOrderID;
}
};
void FillTreeView()
{
// Load the images in an ImageList.
ImageList^ myImageList = gcnew ImageList;
myImageList->Images->Add( Image::FromFile( "Default.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedDefault.gif" ) );
myImageList->Images->Add( Image::FromFile( "Root.gif" ) );
myImageList->Images->Add( Image::FromFile( "UnselectedCustomer.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedCustomer.gif" ) );
myImageList->Images->Add( Image::FromFile( "UnselectedOrder.gif" ) );
myImageList->Images->Add( Image::FromFile( "SelectedOrder.gif" ) );
// Assign the ImageList to the TreeView.
myTreeView->ImageList = myImageList;
// Set the TreeView control's default image and selected image indexes.
myTreeView->ImageIndex = 0;
myTreeView->SelectedImageIndex = 1;
/* Set the index of image from the
ImageList for selected and unselected tree nodes.*/
this->rootImageIndex = 2;
this->selectedCustomerImageIndex = 3;
this->unselectedCustomerImageIndex = 4;
this->selectedOrderImageIndex = 5;
this->unselectedOrderImageIndex = 6;
// Create the root tree node.
TreeNode^ rootNode = gcnew TreeNode( "CustomerList" );
rootNode->ImageIndex = rootImageIndex;
rootNode->SelectedImageIndex = rootImageIndex;
// Add a main root tree node.
myTreeView->Nodes->Add( rootNode );
// Add a root tree node for each Customer object in the ArrayList.
IEnumerator^ myEnum = customerArray->GetEnumerator();
while ( myEnum->MoveNext() )
{
Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
// Add a child tree node for each Order object.
int countIndex = 0;
array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(myCustomer->CustomerOrders->Count);
IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
while ( myEnum->MoveNext() )
{
Order^ myOrder = safe_cast<Order^>(myEnum->Current);
// Add the Order tree node to the array.
myTreeNodeArray[ countIndex ] = gcnew TreeNode( myOrder->OrderID,unselectedOrderImageIndex,selectedOrderImageIndex );
countIndex++;
}
TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,unselectedCustomerImageIndex,selectedCustomerImageIndex,myTreeNodeArray );
myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
}
}
public class Customer
{
public ArrayList CustomerOrders;
public string CustomerName;
public Customer(string myName)
{
CustomerName = myName;
CustomerOrders = new ArrayList();
}
}
public class Order
{
public string OrderID;
public Order(string myOrderID )
{
this.OrderID = myOrderID;
}
}
private void FillTreeView()
{
// Load the images in an ImageList.
ImageList myImageList = new ImageList();
myImageList.Images.Add(Image.FromFile("Default.gif"));
myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"));
myImageList.Images.Add(Image.FromFile("Root.gif"));
myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"));
myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"));
myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"));
myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"));
// Assign the ImageList to the TreeView.
myTreeView.ImageList = myImageList;
// Set the TreeView control's default image and selected image indexes.
myTreeView.ImageIndex = 0;
myTreeView.SelectedImageIndex = 1;
/* Set the index of image from the
ImageList for selected and unselected tree nodes.*/
this.rootImageIndex = 2;
this.selectedCustomerImageIndex = 3;
this.unselectedCustomerImageIndex = 4;
this.selectedOrderImageIndex = 5;
this.unselectedOrderImageIndex = 6;
// Create the root tree node.
TreeNode rootNode = new TreeNode("CustomerList");
rootNode.ImageIndex = rootImageIndex;
rootNode.SelectedImageIndex = rootImageIndex;
// Add a main root tree node.
myTreeView.Nodes.Add(rootNode);
// Add a root tree node for each Customer object in the ArrayList.
foreach(Customer myCustomer in customerArray)
{
// Add a child tree node for each Order object.
int countIndex=0;
TreeNode[] myTreeNodeArray = new TreeNode[myCustomer.CustomerOrders.Count];
foreach(Order myOrder in myCustomer.CustomerOrders)
{
// Add the Order tree node to the array.
myTreeNodeArray[countIndex] = new TreeNode(myOrder.OrderID,
unselectedOrderImageIndex, selectedOrderImageIndex);
countIndex++;
}
// Add the Customer tree node.
TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray);
myTreeView.Nodes[0].Nodes.Add(customerNode);
}
}
Public Class Customer
Public CustomerOrders As ArrayList
Public CustomerName As String
Public Sub New(myName As String)
CustomerName = myName
CustomerOrders = New ArrayList()
End Sub
End Class
Public Class Order
Public OrderID As String
Public Sub New(myOrderID As String)
Me.OrderID = myOrderID
End Sub
End Class
Private Sub FillTreeView()
' Load the images in an ImageList.
Dim myImageList As New ImageList()
myImageList.Images.Add(Image.FromFile("Default.gif"))
myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"))
myImageList.Images.Add(Image.FromFile("Root.gif"))
myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"))
myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"))
myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"))
myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"))
' Assign the ImageList to the TreeView.
myTreeView.ImageList = myImageList
' Set the TreeView control's default image and selected image indexes.
myTreeView.ImageIndex = 0
myTreeView.SelectedImageIndex = 1
' Set the index of image from the
' ImageList for selected and unselected tree nodes.
Me.rootImageIndex = 2
Me.selectedCustomerImageIndex = 3
Me.unselectedCustomerImageIndex = 4
Me.selectedOrderImageIndex = 5
Me.unselectedOrderImageIndex = 6
' Create the root tree node.
Dim rootNode As New TreeNode("CustomerList")
rootNode.ImageIndex = rootImageIndex
rootNode.SelectedImageIndex = rootImageIndex
' Add a main root tree node.
myTreeView.Nodes.Add(rootNode)
' Add a root tree node for each Customer object in the ArrayList.
Dim myCustomer As Customer
For Each myCustomer In customerArray
' Add a child tree node for each Order object.
Dim countIndex As Integer = 0
Dim myTreeNodeArray(myCustomer.CustomerOrders.Count) As TreeNode
Dim myOrder As Order
For Each myOrder In myCustomer.CustomerOrders
' Add the Order tree node to the array.
myTreeNodeArray(countIndex) = New TreeNode(myOrder.OrderID, _
unselectedOrderImageIndex, selectedOrderImageIndex)
countIndex += 1
Next myOrder
' Add the Customer tree node.
Dim customerNode As New TreeNode(myCustomer.CustomerName, _
unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray)
myTreeView.Nodes(0).Nodes.Add(customerNode)
Next myCustomer
End Sub
注解
参数 text 值分配给节点 Text 的属性，并成为树节点标签。 值imageIndex``selectedImageIndex是分配给该属性的存储的TreeView.ImageListImageList索引值Image。 如果未选择树节点，则会显示参数中 imageIndex 引用的图像。 同样，当树节点处于选定状态时，将显示参数中 selectedImageIndex 引用的图像。 数组中包含的 children 树节点将添加到 TreeNodeCollection 属性中存储的 Nodes 树节点。