TreeNodeBindingCollection.CopyTo(TreeNodeBinding[], Int32) 方法

  • 參考

定義

命名空間:
System.Web.UI.WebControls
組件:
System.Web.dll

從目標陣列中的指定索引開始，從 TreeNodeBindingCollection 物件中，將所有項目複製至相容的一維陣列 TreeNodeBinding 物件。

public:
 void CopyTo(cli::array <System::Web::UI::WebControls::TreeNodeBinding ^> ^ bindingArray, int index);
public void CopyTo (System.Web.UI.WebControls.TreeNodeBinding[] bindingArray, int index);
override this.CopyTo : System.Web.UI.WebControls.TreeNodeBinding[] * int -> unit
Public Sub CopyTo (bindingArray As TreeNodeBinding(), index As Integer)

參數

bindingArray
TreeNodeBinding[]

TreeNodeBinding 物件之以零起始的陣列，接收複製自 TreeNodeBindingCollection 的項目。

index
Int32

bindingArray 中要開始接收複製內容的位置。

範例

下列程式碼範例示範如何使用 CopyTo 方法，將集合的內容 DataBindings 複製到陣列。


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Load(Object sender, EventArgs e)
  {

    // Create an array of TreeNodeBinding objects and then use the
    // CopyTo method to copy the contents of the DataBindings collection
    // to the array.
    TreeNodeBinding[] bindings = new TreeNodeBinding[BookTreeView.DataBindings.Count];
    BookTreeView.DataBindings.CopyTo(bindings, 0);

    // Iterate through the array and display the value of the text field
    // property of each TreeNodeBinding object.
    MessageLabel.Text = "The field names for each node level are: <br/>";

    foreach (TreeNodeBinding binding in bindings)
    {

      MessageLabel.Text += binding.TextField + "<br/>";

    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNodeBindingCollection CopyTo Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNodeBindingCollection CopyTo Example</h3>
    
      <asp:TreeView id="BookTreeView" 
         DataSourceID="BookXmlDataSource"
         runat="server">
         
        <DataBindings>
          <asp:TreeNodeBinding DataMember="Book" 
            TextField="Title"/>
          <asp:TreeNodeBinding DataMember="Chapter" 
            TextField="Heading"/>
          <asp:TreeNodeBinding DataMember="Section" 
            TextField="Subject"/>
        </DataBindings>
         
      </asp:TreeView>
      
      <asp:XmlDataSource id="BookXmlDataSource"  
         DataFile="Book.xml"
         runat="server">
      </asp:XmlDataSource>
    
      <br/>
    
      <asp:Label id="MessageLabel" runat="server"/>
    
    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    ' Create an array of TreeNodeBinding objects and then use the
    ' CopyTo method to copy the contents of the DataBindings collection
    ' to the array.
    Dim bindings(BookTreeView.DataBindings.Count - 1) As TreeNodeBinding
    BookTreeView.DataBindings.CopyTo(bindings, 0)

    ' Iterate through the array and display the value of the text field
    ' property of each TreeNodeBinding object.
    MessageLabel.Text = "The field names for each node level are: <br/>"

    
    Dim binding As TreeNodeBinding
    For Each binding In bindings

      MessageLabel.Text &= binding.TextField & "<br/>"

    Next

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNodeBindingCollection CopyTo Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNodeBindingCollection CopyTo Example</h3>
    
      <asp:TreeView id="BookTreeView" 
         DataSourceID="BookXmlDataSource"
         runat="server">
         
        <DataBindings>
          <asp:TreeNodeBinding DataMember="Book" 
            TextField="Title"/>
          <asp:TreeNodeBinding DataMember="Chapter" 
            TextField="Heading"/>
          <asp:TreeNodeBinding DataMember="Section" 
            TextField="Subject"/>
        </DataBindings>
         
      </asp:TreeView>
      
      <asp:XmlDataSource id="BookXmlDataSource"  
         DataFile="Book.xml"
         runat="server">
      </asp:XmlDataSource>
    
      <br/>
    
      <asp:Label id="MessageLabel" runat="server"/>
    
    </form>
  </body>
</html>

備註

CopyTo使用 方法，將 物件 bindingArray 的內容 TreeNodeBindingCollection 複製到 。 從 開始 index 複製專案。 然後，您可以使用 陣列來存取集合中的專案。

或者，您可以使用 GetEnumerator 方法來建立列舉值，以用來存取集合中的專案。

適用於

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