RangeValuePattern.RangeValuePatternInformation.Maximum Property
Definition
Important
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Gets the maximum range value supported by the UI Automation element.
public:
property double Maximum { double get(); };
public double Maximum { get; }
member this.Maximum : double
Public ReadOnly Property Maximum As Double
Property Value
The maximum value supported by the UI Automation element or null
if the element does not support Maximum. The default value is 0.0.
Examples
In the following example, an AutomationElement that supports the RangeValuePattern control pattern has its value set to the control-specific maximum value.
SetRangeValue(targetControl[0], rangeValuePattern.Current.Maximum);
SetRangeValue(targetControl(0), rangeValuePattern.Current.Maximum)
End Sub
///--------------------------------------------------------------------
/// <summary>
/// Sets the range value of the control of interest.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <param name="rangeValue">
/// The value (either relative or absolute) to set the control to.
/// </param>
///--------------------------------------------------------------------
private void SetRangeValue(
AutomationElement targetControl,
double rangeValue)
{
if (targetControl == null)
{
throw new ArgumentException("Argument cannot be null.");
}
RangeValuePattern rangeValuePattern =
GetRangeValuePattern(targetControl);
if (rangeValuePattern.Current.IsReadOnly)
{
throw new InvalidOperationException("Control is read-only.");
}
try
{
rangeValuePattern.SetValue(rangeValue);
}
catch (ArgumentOutOfRangeException)
{
// TO DO: Error handling.
}
catch (ArgumentException)
{
// TO DO: Error handling.
}
}
'''--------------------------------------------------------------------
''' <summary>
''' Sets the range value of the control of interest.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <param name="rangeValue">
''' The value (either relative or absolute) to set the control to.
''' </param>
'''--------------------------------------------------------------------
Private Overloads Sub SetRangeValue( _
ByVal targetControl As AutomationElement, ByVal rangeValue As Double)
If targetControl Is Nothing Then
Throw New ArgumentException("Argument cannot be null.")
End If
Dim rangeValuePattern As RangeValuePattern = _
GetRangeValuePattern(targetControl)
If rangeValuePattern.Current.IsReadOnly Then
Throw New InvalidOperationException("Control is read-only.")
End If
Try
rangeValuePattern.SetValue(rangeValue)
Catch exc As ArgumentOutOfRangeException
' TO DO: Error handling.
Catch exc As ArgumentException
' TO DO: Error handling.
End Try
End Sub
///--------------------------------------------------------------------
/// <summary>
/// Obtains a RangeValuePattern control pattern from an
/// automation element.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <returns>
/// A RangeValuePattern object.
/// </returns>
///--------------------------------------------------------------------
private RangeValuePattern GetRangeValuePattern(
AutomationElement targetControl)
{
RangeValuePattern rangeValuePattern = null;
try
{
rangeValuePattern =
targetControl.GetCurrentPattern(
RangeValuePattern.Pattern)
as RangeValuePattern;
}
// Object doesn't support the
// RangeValuePattern control pattern
catch (InvalidOperationException)
{
return null;
}
return rangeValuePattern;
}
'''--------------------------------------------------------------------
''' <summary>
''' Obtains a RangeValuePattern control pattern from an
''' automation element.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <returns>
''' A RangeValuePattern object.
''' </returns>
'''--------------------------------------------------------------------
Private Function GetRangeValuePattern( _
ByVal targetControl As AutomationElement) As RangeValuePattern
Dim rangeValuePattern As RangeValuePattern = Nothing
Try
rangeValuePattern = DirectCast( _
targetControl.GetCurrentPattern(rangeValuePattern.Pattern), _
RangeValuePattern)
Catch exc As InvalidOperationException
' Object doesn't support the
' RangeValuePattern control pattern
Return Nothing
End Try
Return rangeValuePattern
End Function 'GetRangeValuePattern
Applies to
See also
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