本文整理匯總了VB.NET中System.Web.UI.HtmlControls.HtmlSelectBuilder類的典型用法代碼示例。如果您正苦於以下問題：VB.NET HtmlSelectBuilder類的具體用法？VB.NET HtmlSelectBuilder怎麽用？VB.NET HtmlSelectBuilder使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了HtmlSelectBuilder類的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: AddParsedSubObject
' 導入命名空間
Imports System.Security.Permissions
Imports System.Collections
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls
Namespace Samples.AspNet.VB.Controls
' Define a type of child control for the custom HtmlSelect control.
Public Class MyOption1
Private _id As String
Private _value As String
Private _text As String
Public Property optionid() As String
Get
Return _id
End Get
Set(ByVal value As String)
_id = value
End Set
End Property
Public Property value() As String
Get
Return _value
End Get
Set(ByVal value As String)
_value = value
End Set
End Property
Public Property [text]() As String
Get
Return _text
End Get
Set(ByVal value As String)
_text = value
End Set
End Property
End Class
' Define a type of child control for the custom HtmlSelect control.
Public Class MyOption2
Private _id As String
Private _value As String
Private _text As String
Public Property optionid() As String
Get
Return _id
End Get
Set(ByVal value As String)
_id = value
End Set
End Property
Public Property value() As String
Get
Return _value
End Get
Set(ByVal value As String)
_value = value
End Set
End Property
Public Property [text]() As String
Get
Return _text
End Get
Set(ByVal value As String)
_text = value
End Set
End Property
End Class
' Define a custom HtmlSelectBuilder control.
Public Class MyHtmlSelectBuilder
Inherits HtmlSelectBuilder
<AspNetHostingPermission(SecurityAction.Demand, Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Overrides Function GetChildControlType(ByVal tagName As String, ByVal attribs As IDictionary) As Type
' Distinguish between two possible types of child controls.
If tagName.ToLower().EndsWith("myoption1") Then
Return GetType(MyOption1)
ElseIf tagName.ToLower().EndsWith("myoption2") Then
Return GetType(MyOption2)
End If
Return Nothing
End Function
End Class
<ControlBuilderAttribute(GetType(MyHtmlSelectBuilder))> _
Public Class CustomHtmlSelect
Inherits HtmlSelect
' Override AddParsedSubObject to treat the two types
' of child controls differently.
Protected Overrides Sub AddParsedSubObject(ByVal obj As Object)
Dim _outputtext As String
If TypeOf obj Is MyOption1 Then
_outputtext = "option group 1: " + CType(obj, MyOption1).text
Dim li As New ListItem(_outputtext, CType(obj, MyOption1).value)
MyBase.Items.Add(li)
End If
If TypeOf obj Is MyOption2 Then
_outputtext = "option group 2: " + CType(obj, MyOption2).text
Dim li As New ListItem(_outputtext, CType(obj, MyOption2).value)
MyBase.Items.Add(li)
End If
End Sub
End Class
End Namespace