TreeNode.Depth 屬性
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
取得節點的深度。
public:
property int Depth { int get(); };
[System.ComponentModel.Browsable(false)]
public int Depth { get; }
[<System.ComponentModel.Browsable(false)>]
member this.Depth : int
Public ReadOnly Property Depth As Integer
屬性值
節點的深度。
- 屬性
範例
下列程式碼範例示範如何使用 Depth 屬性來判斷節點的深度。 它會初始化所有節點,其深度為一到選取的狀態。 若要讓此範例正常運作,您必須將下面的範例 XML 資料複製到名為 Newsgroup.xml 的檔案。
<%@ 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 Data_Bound(Object sender, TreeNodeEventArgs e)
{
// Check the depth of a node as it is being bound to data.
// Initialize the Checked property to true if the depth is 1.
if(e.Node.Depth == 1)
{
e.Node.Checked = true;
}
else
{
e.Node.Checked = false;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNode Checked Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNode Checked Example</h3>
<asp:TreeView id="NewsgroupTreeView"
DataSourceID="NewsgroupXmlDataSource"
OnTreeNodeDataBound="Data_Bound"
ShowCheckBoxes="All"
ExpandDepth="2"
runat="server">
<DataBindings>
<asp:TreeNodeBinding DataMember="category" TextField="Name"/>
<asp:TreeNodeBinding DataMember="group" TextField="Name"/>
</DataBindings>
</asp:TreeView>
<asp:XmlDataSource id="NewsgroupXmlDataSource"
DataFile="Newsgroup.xml"
runat="server">
</asp:XmlDataSource>
</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 Data_Bound(ByVal sender As Object, ByVal e As TreeNodeEventArgs)
' Check the depth of a node as it is being bound to data.
' Initialize the Checked property to true if the depth is 1.
If e.Node.Depth = 1 Then
e.Node.Checked = True
Else
e.Node.Checked = False
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNode Checked Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNode Checked Example</h3>
<asp:TreeView id="NewsgroupTreeView"
DataSourceID="NewsgroupXmlDataSource"
OnTreeNodeDataBound="Data_Bound"
ShowCheckBoxes="All"
ExpandDepth="2"
runat="server">
<DataBindings>
<asp:TreeNodeBinding DataMember="category" TextField="Name"/>
<asp:TreeNodeBinding DataMember="group" TextField="Name"/>
</DataBindings>
</asp:TreeView>
<asp:XmlDataSource id="NewsgroupXmlDataSource"
DataFile="Newsgroup.xml"
runat="server">
</asp:XmlDataSource>
</form>
</body>
</html>
下列程式碼是上一個範例的 XML 資料範例。
<category name="news.microsoft.com">
<group name="microsoft.public.dotnet.framework.aspnet"/>
<group name="microsoft.public.dotnet.framework.aspnet.mobile"/>
<group name="microsoft.public.dotnet.framework.aspnet.webservices"/>
</category>
備註
Depth使用 屬性來判斷節點的深度。 深度代表節點與根節點之間的階層層級數目。 例如,根節點的深度為零。 根節點的子節點具有深度,依此類故。