TreeView.ImageList プロパティ

.NET Framework クラス ライブラリ リファレンス

TreeView.ImageList プロパティ

ツリー ノードで使用される Image オブジェクトを格納している ImageList を取得または設定します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

Public Property ImageList As
 ImageList

Visual Basic (使用法)

Dim instance As TreeView
Dim value As ImageList

value = instance.ImageList

instance.ImageList = value

C#

public ImageList ImageList { get; set;
 }

C++

public:
property ImageList^ ImageList {
    ImageList^ get ();
    void set (ImageList^ value);
}

J#

/** @property */
public ImageList get_ImageList ()

/** @property */
public void set_ImageList (ImageList value)

JScript

public function get ImageList
 () : ImageList

public function set ImageList
 (value : ImageList)

プロパティ値
ツリー ノードで使用される Image オブジェクトを格納している ImageList。既定値は null 参照 (Visual Basic では Nothing) です。

解説

ImageList プロパティ値が null 参照 (Visual Basic では Nothing) 以外の場合は、すべてのツリー ノードに、ImageList に格納されている最初の Image が表示されます。

使用例

ImageList を作成して TreeView コントロールに割り当て、TreeView コントロールに TreeNode オブジェクトを設定するコード例を次に示します。ツリー ノードには、選択状態または非選択状態のときに表示される、ImageList からのイメージが割り当てられます。この例は、TreeView が配置された Form があり、それぞれが Order オブジェクトを格納している Customer オブジェクトが配置された ArrayList があることを前提にしています。また、Customer オブジェクトと Order オブジェクトが定義されていることも前提にしています。

Visual Basic

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

C#

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);
    }
}

C++

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 );
   }
}

J#

private void FillTreeView()
{
    // Load the images in an ImageList.
    ImageList myImageList = new ImageList();
    myImageList.get_Images().Add(Image.FromFile("Default.gif"));
    myImageList.get_Images().Add(Image.FromFile("SelectedDefault.gif"));
    myImageList.get_Images().Add(Image.FromFile("Root.gif"));
    myImageList.get_Images().Add(Image.FromFile("UnselectedCustomer.gif"));
    myImageList.get_Images().Add(Image.FromFile("SelectedCustomer.gif"));
    myImageList.get_Images().Add(Image.FromFile("UnselectedOrder.gif"));
    myImageList.get_Images().Add(Image.FromFile("SelectedOrder.gif"));
    // Assign the ImageList to the TreeView.
    myTreeView.set_ImageList(myImageList);
    // Set the TreeView control's default image and selected image indexes.
    myTreeView.set_ImageIndex(0);
    myTreeView.set_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.set_ImageIndex(rootImageIndex);
    rootNode.set_SelectedImageIndex(rootImageIndex);
    // Add a main root tree node.
    myTreeView.get_Nodes().Add(rootNode);
    // Add a root tree node for each Customer object in the ArrayList.
    for (int iCtr1 = 0; iCtr1 < customerArray.get_Count();
 iCtr1++) {
        Customer myCustomer = (Customer)customerArray.get_Item(iCtr1);
        // Add a child tree node for each Order object.
        int countIndex = 0;
        TreeNode myTreeNodeArray[] =
            new TreeNode[myCustomer.customerOrders.get_Count()];
        for (int iCtr2 = 0; iCtr2 < myCustomer.customerOrders.get_Count();
            iCtr2++) {
            Order myOrder = (Order)myCustomer.customerOrders.get_Item(iCtr2);
            // Add the Order tree node to the array.
            myTreeNodeArray.set_Item(countIndex,
                new TreeNode(myOrder.orderID, unselectedOrderImageIndex
,
                selectedOrderImageIndex));
            countIndex++;
        }
        // Add the Customer tree node.
        TreeNode customerNode = new TreeNode(myCustomer.customerName
,
            unselectedCustomerImageIndex, selectedCustomerImageIndex,
            myTreeNodeArray);
        myTreeView.get_Nodes().get_Item(0).get_Nodes().Add(customerNode);
    }
} //FillTreeView

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
TreeView クラス
TreeView メンバ
System.Windows.Forms 名前空間