HyperLink.AddParsedSubObject(Object) Metode
Definisi
Penting
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Memberi tahu kontrol bahwa elemen diurai, dan menambahkan elemen ke HyperLink kontrol.
protected:
override void AddParsedSubObject(System::Object ^ obj);protected override void AddParsedSubObject(object obj);override this.AddParsedSubObject : obj -> unitProtected Overrides Sub AddParsedSubObject (obj As Object)Parameter
Contoh
Contoh kode berikut menunjukkan cara mengambil alih AddParsedSubObject metode dalam kontrol server kustom HyperLink sehingga selalu mengatur properti teks ke properti teks objek yang diurai, jika objek yang diurai adalah Literal, dan ke string kosong sebaliknya.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Custom HyperLink - AddParsedSubObject - C# Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HyperLink - AddParsedSubObject - C# Example</h3>
<aspSample:CustomHyperLinkAddParsedSubObject
id="HyperLink1" runat="server" Target="_blank"
NavigateUrl="http://www.microsoft.com/"
ToolTip="Microsoft Web Site">www.microsoft.com
</aspSample:CustomHyperLinkAddParsedSubObject>
</form>
</body>
</html>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.VB.Controls" Assembly="Samples.AspNet.VB" %>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Custom HyperLink - AddParsedSubObject - VB.NET Example</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom HyperLink - AddParsedSubObject - VB.NET Example</h3>
<aspSample:CustomHyperLinkAddParsedSubObject
id="HyperLink1" runat="server" Target="_blank"
NavigateUrl="http://www.microsoft.com/"
ToolTip="Microsoft Web Site">www.microsoft.com
</aspSample:CustomHyperLinkAddParsedSubObject>
</form>
</body>
</html>
using System.Web;
using System.Security.Permissions;
namespace Samples.AspNet.CS.Controls
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomHyperLinkAddParsedSubObject : System.Web.UI.WebControls.HyperLink
{
protected override void AddParsedSubObject(object obj)
{
// If the server control contains any child controls.
if (this.HasControls())
{
// Notify the base server control that an element, either XML or HTML,
// was parsed, and adds the element to the server control's
// ControlCollection object.
base.AddParsedSubObject(obj);
}
// Else the server control doesn't contain any child controls.
else
{
// If the parsed element is a LiteralControl.
if (obj is System.Web.UI.LiteralControl)
{
// Set the server control's Text property to the parsed element's Text value.
this.Text = ((System.Web.UI.LiteralControl)obj).Text;
}
// Else the parsed element is not a LiteralControl.
else
{
// If the server control has a value in the Text property.
string currentText = this.Text;
if (currentText.Length != 0)
{
// Set the server control's Text property to an empty string.
this.Text = System.String.Empty;
// Notify the base server control that a new LiteralControl was parsed,
// and adds the element to the server control's ControlCollection object.
base.AddParsedSubObject(new System.Web.UI.LiteralControl(currentText));
}
base.AddParsedSubObject(obj);
}
}
}
}
}
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class CustomHyperLinkAddParsedSubObject
Inherits System.Web.UI.WebControls.HyperLink
Protected Overrides Sub AddParsedSubObject(ByVal obj As Object)
' If the server control contains any child controls.
If Me.HasControls() Then
' Notify the base server control that an element, either XML or HTML,
' was parsed, and adds the element to the server control's
' ControlCollection object.
MyBase.AddParsedSubObject(obj)
' Else the server control doesn't contain any child controls.
Else
' If the parsed element is a LiteralControl.
If TypeOf obj Is System.Web.UI.LiteralControl Then
' Set the server control's Text property to the parsed element's Text value.
Me.Text = CType(obj, System.Web.UI.LiteralControl).Text
' Else the parsed element is not a LiteralControl.
Else
' If the server control has a value in the Text property.
Dim currentText As String = Me.Text
If currentText.Length <> 0 Then
' Set the server control's Text property to an empty string.
Me.Text = System.String.Empty
' Notify the base server control that a new LiteralControl was parsed,
' and adds the element to the server control's ControlCollection object.
MyBase.AddParsedSubObject(New System.Web.UI.LiteralControl(currentText))
End If
MyBase.AddParsedSubObject(obj)
End If
End If
End Sub
End Class
Keterangan
Metode ini digunakan terutama oleh pengembang kontrol, saat mengambil kontrol kustom dari HyperLink kelas.
Jika objek input adalah LiteralControl, dan HyperLink kontrol tidak memiliki kontrol anak, maka objek input digunakan untuk mengatur Text properti kontrol. Jika tidak, AddParsedSubObject metode kelas dasar Control dipanggil dan objek yang ditentukan ditambahkan ke Controls koleksi.
