本文整理匯總了VB.NET中System.Windows.Automation.ExpandCollapsePattern.Expand方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET ExpandCollapsePattern.Expand方法的具體用法？VB.NET ExpandCollapsePattern.Expand怎麽用？VB.NET ExpandCollapsePattern.Expand使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了ExpandCollapsePattern.Expand方法的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: GetExpandCollapsePattern
'''--------------------------------------------------------------------
''' <summary>
''' Obtains an ExpandCollapsePattern control pattern from an
''' automation element.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <returns>
''' A ExpandCollapsePattern object.
''' </returns>
'''--------------------------------------------------------------------
Private Function GetExpandCollapsePattern( _
ByVal targetControl As AutomationElement) As ExpandCollapsePattern
Dim expandCollapsePattern As ExpandCollapsePattern = Nothing
Try
expandCollapsePattern = DirectCast( _
targetControl.GetCurrentPattern(expandCollapsePattern.Pattern), _
ExpandCollapsePattern)
Catch exc As InvalidOperationException
' Object doesn't support the ExpandCollapsePattern control pattern.
Return Nothing
End Try
Return expandCollapsePattern
End Function 'GetExpandCollapsePattern示例2: ExpandCollapseMenuItem
'''--------------------------------------------------------------------
''' <summary>
''' Programmatically expand or collapse a menu item.
''' </summary>
''' <param name="menuItem">
''' The target menu item.
''' </param>
'''--------------------------------------------------------------------
Private Sub ExpandCollapseMenuItem(ByVal menuItem As AutomationElement)
If menuItem Is Nothing Then
Throw New ArgumentNullException( _
"AutomationElement argument cannot be null.")
End If
Dim expandCollapsePattern As ExpandCollapsePattern = _
GetExpandCollapsePattern(menuItem)
If expandCollapsePattern Is Nothing Then
Return
End If
If expandCollapsePattern.Current.ExpandCollapseState = _
ExpandCollapseState.LeafNode Then
Return
End If
Try
If expandCollapsePattern.Current.ExpandCollapseState = _
ExpandCollapseState.Expanded Then
' Collapse the menu item.
expandCollapsePattern.Collapse()
ElseIf expandCollapsePattern.Current.ExpandCollapseState = _
ExpandCollapseState.Collapsed OrElse _
expandCollapsePattern.Current.ExpandCollapseState = _
ExpandCollapseState.PartiallyExpanded Then
' Expand the menu item.
expandCollapsePattern.Expand()
End If
Catch exc As ElementNotEnabledException
' Control is not enabled
' TO DO: error handling.
Catch exc As InvalidOperationException
' Control is unable to perform operation
' TO DO: error handling.
End Try
End Sub