TreeNode.Selected Properti
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan atau menetapkan nilai yang menunjukkan apakah simpul dipilih.
public:
property bool Selected { bool get(); void set(bool value); };public bool Selected { get; set; }member this.Selected : bool with get, setPublic Property Selected As BooleanNilai Properti
true jika simpul dipilih; jika tidak, false. Defaultnya adalah false.
Contoh
Contoh kode berikut menunjukkan cara menggunakan Selected properti untuk memilih simpul dalam TreeView kontrol.
<%@ 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_Command(Object sender, CommandEventArgs e)
{
// Iterate through the child nodes of the root node and find
// the nodes for Chapter One and Chapter Two.
foreach(TreeNode node in LinksTreeView.Nodes[0].ChildNodes)
{
// Select the appropriate node based on which button was clicked.
switch(node.Text)
{
case "Chapter One":
// If the button clicked was "Chapter One", select the node
// using the Selected property.
if (e.CommandName == "Chapter One")
{
// Select the node using the Selected property.
node.Selected = true;
}
break;
case "Chapter Two":
// If the button clicked was "Chapter Two", select the node
// using the Select method.
if (e.CommandName == "Chapter Two")
{
// Select the node using the Select method.
node.Select();
}
break;
default:
// Do nothing.
break;
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNode Selected and Select() Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNode Selected and Select() Example</h3>
<asp:TreeView id="LinksTreeView"
Font-Names= "Arial"
ForeColor="Blue"
SelectedNodeStyle-BackColor="Yellow"
ExpandDepth="2"
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"
Selected="True">
<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:Button id="SelectChapterOneButton"
Text="Select Chapter One"
CommandName="Chapter One"
OnCommand="Button_Command"
runat="server"/>
<asp:Button id="SelectChapterTwoButton"
Text="Select Chapter Two"
CommandName="Chapter Two"
OnCommand="Button_Command"
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_Command(ByVal sender As Object, ByVal e As CommandEventArgs)
' Iterate through the child nodes of the root node and find
' the nodes for Chapter One and Chapter Two.
Dim node As TreeNode
For Each node In LinksTreeView.Nodes(0).ChildNodes
' Select the appropriate node based on which button was clicked.
Select Case node.Text
Case "Chapter One"
' If the button clicked was "Chapter One", select the node
' using the Selected property.
If e.CommandName = "Chapter One" Then
' Select the node using the Selected property.
node.Selected = True
End If
Case "Chapter Two"
' If the button clicked was "Chapter Two", select the node
' using the Selected method.
If e.CommandName = "Chapter Two" Then
' Select the node using the Select method.
node.Select()
End If
Case Else
' Do nothing.
End Select
Next
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNode Selected and Select() Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNode Selected and Select() Example</h3>
<asp:TreeView id="LinksTreeView"
Font-Names= "Arial"
ForeColor="Blue"
SelectedNodeStyle-BackColor="Yellow"
ExpandDepth="2"
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"
Selected="True">
<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:Button id="SelectChapterOneButton"
Text="Select Chapter One"
CommandName="Chapter One"
OnCommand="Button_Command"
runat="server"/>
<asp:Button id="SelectChapterTwoButton"
Text="Select Chapter Two"
CommandName="Chapter Two"
OnCommand="Button_Command"
runat="server"/>
</form>
</body>
</html>
Keterangan
Selected Gunakan properti untuk menentukan atau menentukan apakah simpul dipilih.
Nota
Meskipun properti dapat digunakan untuk menentukan apakah simpul dipilih, lebih umum untuk menggunakan SelectedNode properti .
Hanya satu simpul yang dapat dipilih pada satu waktu dalam TreeView kontrol saat menggunakan properti ini.
Nota
Sebagai alternatif, Anda juga dapat memilih simpul dengan menggunakan Select metode .
Nilai properti ini disimpan dalam status tampilan.
