TreeView.FindNode(String) Methode
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
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.TreeNodePublic Function FindNode (valuePath As String) As TreeNodeParameter
- valuePath
- String
Der Wertpfad eines Knotens.
Gibt zurück
Der TreeNode angegebene Wertpfad.
Beispiele
Im folgenden Codebeispiel wird die Verwendung der FindNode Methode zum Abrufen eines Knotens aus dem TreeView Steuerelement veranschaulicht.
Von Bedeutung
In diesem Beispiel handelt es sich um ein Textfeld, das Benutzereingaben akzeptiert, bei denen es sich um eine potenzielle Sicherheitsrisiken handelt. Standardmäßig überprüfen ASP.NET Webseiten, dass die Benutzereingabe keine Skript- oder HTML-Elemente enthält. Weitere Informationen finden Sie unter Script Exploits Overview.
<%@ 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>
Hinweise
Verwenden Sie die FindNode Methode, um einen Knoten aus dem TreeView Steuerelement am angegebenen Wertpfad abzurufen. Der Wertpfad enthält eine durch Trennzeichen getrennte Liste von Knotenwerten, die einen Pfad vom Stammknoten zum aktuellen Knoten bilden. Jeder Knoten speichert seinen Wertpfad in der ValuePath Eigenschaft. Die PathSeparator Eigenschaft gibt das Trennzeichen an, das zum Trennen der Knotenwerte verwendet wird.
