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TreeNode.Parent Propriété

  • Référence

Définition

Espace de noms:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Obtient le nœud parent du nœud actuel.

public:
 property System::Web::UI::WebControls::TreeNode ^ Parent { System::Web::UI::WebControls::TreeNode ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Web.UI.WebControls.TreeNode Parent { get; }
[<System.ComponentModel.Browsable(false)>]
member this.Parent : System.Web.UI.WebControls.TreeNode
Public ReadOnly Property Parent As TreeNode

Valeur de propriété

TreeNode

TreeNode qui représente le nœud parent du nœud actuel.

Attributs
BrowsableAttribute

Exemples

L’exemple de code suivant montre comment utiliser la Parent propriété pour accéder à la Text propriété du nœud parent du nœud actuel.


<%@ 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 Selection_Changed(Object sender, EventArgs e)
  {

    // Display the selected node and its parent node.
    Message.Text = "You selected " + LinksTreeView.SelectedNode.Text + ". ";

    if(LinksTreeView.SelectedNode.Parent.Depth != -1)
    {

      Message.Text += "Its parent node is " + LinksTreeView.SelectedNode.Parent.Text + ".";

    }
    else
    {

      Message.Text += "This is a root node and does not have a parent node.";

    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Parent Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Parent Example</h3>
      
      <h5>Select a node from the TreeView control.</h5>
    
      <asp:TreeView id="LinksTreeView"
        Font-Names= "Arial"
        ForeColor="Blue"
        ExpandDepth="2"
        OnSelectedNodeChanged="Selection_Changed" 
        runat="server">
         
        <LevelStyles>
        
          <asp:TreeNodeStyle ChildNodesPadding="10" 
            Font-Bold="true" 
            Font-Size="12pt" 
            ForeColor="DarkGreen"/>
          <asp:TreeNodeStyle ChildNodesPadding="5" 
            Font-Bold="true" 
            Font-Size="10pt"/>
          <asp:TreeNodeStyle ChildNodesPadding="5" 
            Font-UnderLine="true" 
            Font-Size="10pt"/>
          <asp:TreeNodeStyle ChildNodesPadding="10" 
            Font-Size="8pt"/>
             
        </LevelStyles>
         
        <Nodes>
        
          <asp:TreeNode Text="Table of Contents">
             
            <asp:TreeNode Text="Chapter One">
            
              <asp:TreeNode Text="Section 1.0">
              
                <asp:TreeNode Text="Topic 1.0.1"/>
                <asp:TreeNode Text="Topic 1.0.2"/>
                <asp:TreeNode Text="Topic 1.0.3"/>
              
              </asp:TreeNode>
              
              <asp:TreeNode Text="Section 1.1">
              
                <asp:TreeNode Text="Topic 1.1.1"/>
                <asp:TreeNode Text="Topic 1.1.2"/>
                <asp:TreeNode Text="Topic 1.1.3"/>
                <asp:TreeNode Text="Topic 1.1.4"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
            <asp:TreeNode Text="Chapter Two">
            
              <asp:TreeNode Text="Section 2.0">
              
                <asp:TreeNode Text="Topic 2.0.1"/>
                <asp:TreeNode Text="Topic 2.0.2"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
          </asp:TreeNode>
          
          <asp:TreeNode Text="Appendix A" />
          <asp:TreeNode Text="Appendix B" />
          <asp:TreeNode Text="Appendix C" />
        
        </Nodes>
        
      </asp:TreeView>
      
      <br /><br />
      
      <asp:Label id="Message"
         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 Selection_Changed(ByVal sender As Object, ByVal e As EventArgs)

    ' Display the selected node and its parent node.
    Message.Text = "You selected " & LinksTreeView.SelectedNode.Text & ". "

    If LinksTreeView.SelectedNode.Parent.Depth <> -1 Then

      Message.Text &= "Its parent node is " & LinksTreeView.SelectedNode.Parent.Text & "."

    Else

      Message.Text &= "This is a root node and does not have a parent node."

    End If

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Parent Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Parent Example</h3>
      
      <h5>Select a node from the TreeView control.</h5>
    
      <asp:TreeView id="LinksTreeView"
        Font-Names= "Arial"
        ForeColor="Blue"
        ExpandDepth="2"
        OnSelectedNodeChanged="Selection_Changed" 
        runat="server">
         
        <LevelStyles>
        
          <asp:TreeNodeStyle ChildNodesPadding="10" 
            Font-Bold="true" 
            Font-Size="12pt" 
            ForeColor="DarkGreen"/>
          <asp:TreeNodeStyle ChildNodesPadding="5" 
            Font-Bold="true" 
            Font-Size="10pt"/>
          <asp:TreeNodeStyle ChildNodesPadding="5" 
            Font-UnderLine="true" 
            Font-Size="10pt"/>
          <asp:TreeNodeStyle ChildNodesPadding="10" 
            Font-Size="8pt"/>
             
        </LevelStyles>
         
        <Nodes>
        
          <asp:TreeNode Text="Table of Contents">
             
            <asp:TreeNode Text="Chapter One">
            
              <asp:TreeNode Text="Section 1.0">
              
                <asp:TreeNode Text="Topic 1.0.1"/>
                <asp:TreeNode Text="Topic 1.0.2"/>
                <asp:TreeNode Text="Topic 1.0.3"/>
              
              </asp:TreeNode>
              
              <asp:TreeNode Text="Section 1.1">
              
                <asp:TreeNode Text="Topic 1.1.1"/>
                <asp:TreeNode Text="Topic 1.1.2"/>
                <asp:TreeNode Text="Topic 1.1.3"/>
                <asp:TreeNode Text="Topic 1.1.4"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
            <asp:TreeNode Text="Chapter Two">
            
              <asp:TreeNode Text="Section 2.0">
              
                <asp:TreeNode Text="Topic 2.0.1"/>
                <asp:TreeNode Text="Topic 2.0.2"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
          </asp:TreeNode>
          
          <asp:TreeNode Text="Appendix A" />
          <asp:TreeNode Text="Appendix B" />
          <asp:TreeNode Text="Appendix C" />
        
        </Nodes>
        
      </asp:TreeView>
      
      <br /><br />
      
      <asp:Label id="Message"
         runat="server"/>   

    </form>
  </body>
</html>

Remarques

La Parent propriété retourne un TreeNode objet qui représente le nœud parent du nœud actuel. Il est couramment utilisé pour déterminer le nœud parent ou pour accéder aux propriétés du nœud parent.

Notes

Un nœud racine n’a pas de nœud parent.

Pour accéder aux nœuds enfants du nœud actuel, utilisez la ChildNodes propriété.

S’applique à

Voir aussi