TreeNodeBindingCollection.Insert(Int32, TreeNodeBinding) Metodo
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Inserisce l'oggetto TreeNodeBinding specificato nell'oggetto TreeNodeBindingCollection in corrispondenza della posizione di indice specificata.
public:
void Insert(int index, System::Web::UI::WebControls::TreeNodeBinding ^ binding);
public void Insert (int index, System.Web.UI.WebControls.TreeNodeBinding binding);
member this.Insert : int * System.Web.UI.WebControls.TreeNodeBinding -> unit
Public Sub Insert (index As Integer, binding As TreeNodeBinding)
Parametri
- index
- Int32
Posizione dell'indice in base zero in corrispondenza della quale inserire l'oggetto TreeNodeBinding.
- binding
- TreeNodeBinding
Oggetto TreeNodeBinding da inserire.
Esempio
Nell'esempio di codice seguente viene illustrato come utilizzare il Insert metodo per inserire un nuovo TreeNodeBinding oggetto a livello di codice in un TreeNodeBindingCollection oggetto . Per il corretto funzionamento di questo esempio, è necessario copiare i dati XML che si trovano alla fine di questa sezione in un file denominato Book.xml.
<%@ 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 Page_Load(Object sender, EventArgs e)
{
// Use the RemoveAt method to remove the TreeNodeBinding object
// for the third-level nodes (index 2).
BookTreeView.DataBindings.RemoveAt(2);
// Create a new TreeNodeBinding object and set its properties.
TreeNodeBinding newBinding = new TreeNodeBinding();
newBinding.DataMember = "Section";
newBinding.TextField = "Subject";
// Use the Insert method to insert the TreeNodeBinding object
// into the DaaBindings collection at index 2.
BookTreeView.DataBindings.Insert(2, newBinding);
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNodeBindingCollection Insert and RemoveAt Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNodeBindingCollection Insert and RemoveAt Example</h3>
<asp:TreeView id="BookTreeView"
DataSourceID="BookXmlDataSource"
runat="server">
<DataBindings>
<asp:TreeNodeBinding DataMember="Book" TextField="Title"/>
<asp:TreeNodeBinding DataMember="Chapter" TextField="Heading"/>
<asp:TreeNodeBinding DataMember="Section" TextField="Heading"/>
</DataBindings>
</asp:TreeView>
<asp:XmlDataSource id="BookXmlDataSource"
DataFile="Book.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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Use the RemoveAt method to remove the TreeNodeBinding object
' for the third-level nodes (index 2).
BookTreeView.DataBindings.RemoveAt(2)
' Create a new TreeNodeBinding object and set its properties.
Dim newBinding As TreeNodeBinding = New TreeNodeBinding
newBinding.DataMember = "Section"
newBinding.TextField = "Subject"
' Use the Insert method to insert the TreeNodeBinding object to
' the DataBindings collection at index 2.
BookTreeView.DataBindings.Insert(2, newBinding)
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>TreeNodeBindingCollection Insert and RemoveAt Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3>TreeNodeBindingCollection Insert and RemoveAt Example</h3>
<asp:TreeView id="BookTreeView"
DataSourceID="BookXmlDataSource"
runat="server">
<DataBindings>
<asp:TreeNodeBinding DataMember="Book" TextField="Title"/>
<asp:TreeNodeBinding DataMember="Chapter" TextField="Heading"/>
<asp:TreeNodeBinding DataMember="Section" TextField="Heading"/>
</DataBindings>
</asp:TreeView>
<asp:XmlDataSource id="BookXmlDataSource"
DataFile="Book.xml"
runat="server">
</asp:XmlDataSource>
</form>
</body>
</html>
Di seguito sono riportati i dati XML per l'esempio di codice precedente.
<Book Title="Book Title">
<Chapter Heading="Chapter 1">
<Section Heading="Section 1"
Subject="Subject 1">
</Section>
<Section Heading="Section 2"
Subject="Subject 1">
</Section>
</Chapter>
<Chapter Heading="Chapter 2">
<Section Heading="Section 1"
Subject="Subject 1">
</Section>
</Chapter>
</Book>
Commenti
Utilizzare il Insert metodo per inserire l'oggetto specificato TreeNodeBinding nell'oggetto TreeNodeBindingCollection in index
.
In alternativa, è possibile accodare un TreeNodeBinding oggetto alla fine dell'oggetto TreeNodeBindingCollection utilizzando il Add metodo .