本文整理匯總了VB.NET中System.Workflow.ComponentModel.Compiler.ActivityValidator類的典型用法代碼示例。如果您正苦於以下問題：VB.NET ActivityValidator類的具體用法？VB.NET ActivityValidator怎麽用？VB.NET ActivityValidator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ActivityValidator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: ConsoleWriteLineActivityValidator
Class ConsoleWriteLineActivityValidator
Inherits ActivityValidator
Public Overrides Function Validate( _
ByVal manager As System.Workflow.ComponentModel.Compiler.ValidationManager, _
ByVal obj As Object) As System.Workflow.ComponentModel.Compiler.ValidationErrorCollection
'Invoke the base class method implementation to
'perform default validation.
Dim errors As ValidationErrorCollection = MyBase.Validate(manager, obj)
'Make sure there is an activity instance.
Dim crw As ConsoleWriteLineActivity = CType(obj, ConsoleWriteLineActivity)
If crw Is Nothing Then
Throw New InvalidOperationException()
End If
'If the activity has no parent then this validation
'is occurring during the compilation of the activity
'and not during the hosting or creation of an
'activity instance.
If crw.Parent Is Nothing Then
'Can skip the rest of the validation because
'it deals with the hosting and the creation
'of the activity.
Return errors
End If
'Msg is required. Add a validation error if there is no
'Msg specified or Msg is not bound to another property.
If String.IsNullOrEmpty(crw.Msg) And _
crw.GetBinding(ConsoleWriteLineActivity.MsgProperty) Is Nothing Then
errors.Add(New ValidationError("Msg is required", 100, False, "Msg"))
End If
Return errors
End Function
End Class