TreeNode.Selected Propriété
Définition
Important
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Obtient ou définit une valeur qui indique si le nœud est sélectionné.
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 BooleanValeur de propriété
true si le nœud est sélectionné ; sinon, false. La valeur par défaut est false.
Exemples
L’exemple de code suivant montre comment utiliser la Selected propriété pour sélectionner un nœud dans le TreeView contrôle.
<%@ 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>
Remarques
Utilisez la Selected propriété pour spécifier ou déterminer si le nœud est sélectionné.
Notes
Bien que la propriété puisse être utilisée pour déterminer si le nœud est sélectionné, il est plus courant d’utiliser la SelectedNode propriété.
Un seul nœud peut être sélectionné à la fois dans le contrôle lors de l’utilisation TreeView de cette propriété.
Notes
Vous pouvez également sélectionner le nœud à l’aide de la Select méthode.
La valeur de cette propriété est stockée dans l’état d’affichage.