本文整理匯總了VB.NET中System.Web.UI.WebControls.WebParts.WebPartTransformer類的典型用法代碼示例。如果您正苦於以下問題：VB.NET WebPartTransformer類的具體用法？VB.NET WebPartTransformer怎麽用？VB.NET WebPartTransformer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WebPartTransformer類的2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: GetStringValue
' An interface that the transformer provides to the consumer.
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermission(SecurityAction.InheritanceDemand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
Public Interface IString
Sub GetStringValue(ByVal callback As StringCallback)
End Interface示例2: RowToStringTransformer
' A transformer that transforms a row to a string.
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermission(SecurityAction.InheritanceDemand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
<WebPartTransformer(GetType(IWebPartRow), GetType(IString))> _
Public Class RowToStringTransformer
Inherits WebPartTransformer
Implements IString
Private _provider As IWebPartRow
Private _callback As StringCallback
Private Sub GetRowData(ByVal rowData As Object)
Dim props As PropertyDescriptorCollection = _provider.Schema
If ((Not (props Is Nothing)) AndAlso (props.Count > 0) _
AndAlso (Not (rowData Is Nothing))) Then
Dim returnValue As String = String.Empty
For Each prop As PropertyDescriptor In props
If Not (prop Is props(0)) Then
returnValue += ", "
End If
returnValue += prop.DisplayName.ToString() + ": " + _
prop.GetValue(rowData).ToString()
Next
_callback(returnValue)
Else
_callback(Nothing)
End If
End Sub
Public Overrides Function Transform(ByVal providerData As Object) As Object
_provider = CType(providerData, IWebPartRow)
Return Me
End Function
Sub GetStringValue(ByVal callback As StringCallback) _
Implements IString.GetStringValue
If (callback Is Nothing) Then
Throw New ArgumentNullException("callback")
End If
If (Not (_provider Is Nothing)) Then
_callback = callback
_provider.GetRowData(New RowCallback(AddressOf GetRowData))
Else
callback(Nothing)
End If
End Sub
End Class