TreeView.FindNode(String) Metod

Definition

Hämtar TreeNode objektet i TreeView kontrollen på den angivna värdesökvägen.

public:
 System::Web::UI::WebControls::TreeNode ^ FindNode(System::String ^ valuePath);
public System.Web.UI.WebControls.TreeNode FindNode(string valuePath);
member this.FindNode : string -> System.Web.UI.WebControls.TreeNode
Public Function FindNode (valuePath As String) As TreeNode

Parametrar

valuePath
String

Värdesökvägen för en nod.

Returer

Vid TreeNode den angivna värdesökvägen.

Exempel

Följande kodexempel visar hur du använder FindNode metoden för att hämta en nod från TreeView kontrollen.

Important

Det här exemplet har en textruta som accepterar användarindata, vilket är ett potentiellt säkerhetshot. Som standard kontrollerar ASP.NET webbsidor att användarindata inte innehåller skript- eller HTML-element. Mer information finns i Översikt över skriptexploateringar.


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

    // Find the node specified by the user.
    TreeNode node = LinksTreeView.FindNode(Server.HtmlEncode(ValuePathText.Text));

    if (node != null)
    {
      // Indicate that the node was found.
      Message.Text = "The specified node (" + node.ValuePath + ") was found.";
    }
    else
    {
      // Indicate that the node is not in the TreeView control.
      Message.Text = "The specified node (" + ValuePathText.Text + ") is not in this TreeView control.";
    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
  <head runat="server">
    <title>TreeView FindNode Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeView FindNode Example</h3>
    
      <asp:TreeView id="LinksTreeView"
        PathSeparator="/"
        Font-Names= "Arial"
        ForeColor="Blue" 
        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"
            SelectAction="None">
             
            <asp:TreeNode Text="Chapter One" Value="Chapter One">
            
              <asp:TreeNode Text="Section 1.0" Value="Section 1.0">
              
                <asp:TreeNode Text="Topic 1.0.1" Value="Topic 1.0.1"/>
                <asp:TreeNode Text="Topic 1.0.2" Value="Topic 1.0.2"/>
                <asp:TreeNode Text="Topic 1.0.3" Value="Topic 1.0.3"/>
              
              </asp:TreeNode>
              
              <asp:TreeNode Text="Section 1.1">
              
                <asp:TreeNode Text="Topic 1.1.1" Value="Topic 1.1.1"/>
                <asp:TreeNode Text="Topic 1.1.2" Value="Topic 1.1.2"/>
                <asp:TreeNode Text="Topic 1.1.3" Value="Topic 1.1.3"/>
                <asp:TreeNode Text="Topic 1.1.4" Value="Topic 1.1.4"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
            <asp:TreeNode Text="Chapter Two" Value="Chapter Two">
            
              <asp:TreeNode Text="Section 2.0" Value="Section 2.0">
              
                <asp:TreeNode Text="Topic 2.0.1" Value="Topic 2.0.1"/>
                <asp:TreeNode Text="Topic 2.0.2" Value="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>
      
      <hr/>
      
      <br/><br/>
      
      Enter the value path of the node to locate. <br/>
      Use a forward slash (/) to delimit each node value.<br/>
      <asp:TextBox id="ValuePathText" 
        Text="Table of Contents/Chapter One/Section 1.0"
        Width="50%" 
        runat="server"/>
         
      <br/><br/>
      
      <asp:Button id="Submit"
        Text="Find Node"
        OnClick="Button_Click"  
        runat="server"/>
      
      <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 Button_Click(ByVal sender As Object, ByVal e As EventArgs)

    ' Find the node specified by the user.
    Dim node As TreeNode = LinksTreeView.FindNode(Server.HtmlEncode(ValuePathText.Text))

    If Not node Is Nothing Then
   
      ' Indicate that the node was found.
      Message.Text = "The specified node (" & node.ValuePath & ") was found."

    Else

      ' Indicate that the node is not in the TreeView control.
      Message.Text = "The specified node (" & ValuePathText.Text & ") is not in this TreeView control."

    End If

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
  <head runat="server">
    <title>TreeView FindNode Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeView FindNode Example</h3>
    
      <asp:TreeView id="LinksTreeView"
        PathSeparator="/"
        Font-Names= "Arial"
        ForeColor="Blue" 
        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"
            SelectAction="None">
             
            <asp:TreeNode Text="Chapter One" Value="Chapter One">
            
              <asp:TreeNode Text="Section 1.0" Value="Section 1.0">
              
                <asp:TreeNode Text="Topic 1.0.1" Value="Topic 1.0.1"/>
                <asp:TreeNode Text="Topic 1.0.2" Value="Topic 1.0.2"/>
                <asp:TreeNode Text="Topic 1.0.3" Value="Topic 1.0.3"/>
              
              </asp:TreeNode>
              
              <asp:TreeNode Text="Section 1.1">
              
                <asp:TreeNode Text="Topic 1.1.1" Value="Topic 1.1.1"/>
                <asp:TreeNode Text="Topic 1.1.2" Value="Topic 1.1.2"/>
                <asp:TreeNode Text="Topic 1.1.3" Value="Topic 1.1.3"/>
                <asp:TreeNode Text="Topic 1.1.4" Value="Topic 1.1.4"/>
              
              </asp:TreeNode>
            
            </asp:TreeNode>
            
            <asp:TreeNode Text="Chapter Two" Value="Chapter Two">
            
              <asp:TreeNode Text="Section 2.0" Value="Section 2.0">
              
                <asp:TreeNode Text="Topic 2.0.1" Value="Topic 2.0.1"/>
                <asp:TreeNode Text="Topic 2.0.2" Value="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>
      
      <hr/>
      
      <br/><br/>
      
      Enter the value path of the node to locate. <br/>
      Use a forward slash (/) to delimit each node value.<br/>
      <asp:TextBox id="ValuePathText" 
        Text="Table of Contents/Chapter One/Section 1.0"
        Width="50%" 
        runat="server"/>
         
      <br/><br/>
      
      <asp:Button id="Submit"
        Text="Find Node"
        OnClick="Button_Click"  
        runat="server"/>
      
      <br/><br/>
      
      <asp:Label id="Message" runat="server"/>

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

Kommentarer

FindNode Använd metoden för att hämta en nod från TreeView kontrollen på den angivna värdesökvägen. Värdesökvägen innehåller en avgränsareavgränsad lista över nodvärden som utgör en sökväg från rotnoden till den aktuella noden. Varje nod lagrar sin värdesökväg i egenskapen ValuePath . Egenskapen PathSeparator anger avgränsartecknet som används för att avgränsa nodvärdena.

Gäller för

Se även