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ScrollPattern.Scroll Method

Scrolls the visible region of the content area horizontally and vertically.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

'Declaration
Public Sub Scroll ( _
	horizontalAmount As ScrollAmount, _
	verticalAmount As ScrollAmount _
)

Parameters

horizontalAmount
Type: System.Windows.Automation.ScrollAmount

The horizontal increment specific to the control. NoScroll should be passed in if the control cannot be scrolled in this direction.

verticalAmount
Type: System.Windows.Automation.ScrollAmount

The vertical increment specific to the control. NoScroll should be passed in if the control cannot be scrolled in this direction.

ExceptionCondition
ArgumentException

A control supports SmallIncrement values exclusively for horizontal or vertical scrolling but a LargeIncrement value is passed in.

InvalidOperationException

An attempt is made to scroll in an unsupported direction.

In the following example, a ScrollPattern control pattern is obtained from an AutomationElement and is then used to scroll the element a requested amount either horizontally or vertically.

'''-------------------------------------------------------------------- 
''' <summary> 
''' Obtains a ScrollPattern control pattern from an  
''' automation element. 
''' </summary> 
''' <param name="targetControl"> 
''' The automation element of interest. 
''' </param> 
''' <returns> 
''' A ScrollPattern object. 
''' </returns> 
'''-------------------------------------------------------------------- 
Private Function GetScrollPattern( _
ByVal targetControl As AutomationElement) As ScrollPattern
    Dim scrollPattern As ScrollPattern = Nothing 

    Try
        scrollPattern = DirectCast( _
        targetControl.GetCurrentPattern(scrollPattern.Pattern), _
        ScrollPattern)
    Catch 
        ' Object doesn't support the ScrollPattern control pattern 
        Return Nothing 
    End Try 

    Return scrollPattern

End Function 'GetScrollPattern


...


'''-------------------------------------------------------------------- 
''' <summary> 
''' Obtains a ScrollPattern control pattern from an automation  
''' element and attempts to scroll the requested amounts. 
''' </summary> 
''' <param name="targetControl"> 
''' The automation element of interest. 
''' </param> 
''' <param name="hScrollAmount"> 
''' The requested horizontal scroll amount. 
''' </param> 
''' <param name="vScrollAmount"> 
''' The requested vertical scroll amount. 
''' </param> 
'''-------------------------------------------------------------------- 
Private Sub ScrollElement( _
ByVal targetControl As AutomationElement, _
ByVal hScrollAmount As ScrollAmount, _
ByVal vScrollAmount As ScrollAmount)
    If targetControl Is Nothing Then 
        Throw New ArgumentNullException( _
        "AutomationElement argument cannot be null.")
    End If 

    Dim scrollPattern As ScrollPattern = GetScrollPattern(targetControl)

    If scrollPattern Is Nothing Then 
        Return 
    End If 

    Try
        scrollPattern.Scroll(hScrollAmount, vScrollAmount)
    Catch exc As InvalidOperationException
        ' Control not able to scroll in the direction requested; 
        ' when scrollable property of that direction is False 
        ' TO DO: error handling. 
    Catch exc As ArgumentException
        ' If a control supports SmallIncrement values exclusively  
        ' for horizontal or vertical scrolling but a LargeIncrement  
        ' value (NaN if not supported) is passed in. 
        ' TO DO: error handling. 
    End Try 

End Sub 'ScrollElement

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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