RangeValuePattern.RangeValuePatternInformation.Maximum Propiedad

Definición

Espacio de nombres:

System.Windows.Automation

Ensamblado:

UIAutomationClient.dll

Obtiene el valor máximo de intervalo admitido por el elemento Automatización de la interfaz de usuario.

public:
 property double Maximum { double get(); };

public double Maximum { get; }

member this.Maximum : double

Public ReadOnly Property Maximum As Double

Valor de propiedad

Double

Valor máximo admitido por el elemento Automatización de la interfaz de usuario o null si el elemento no admite Maximum. El valor predeterminado es 0.0.

Ejemplos

En el ejemplo siguiente, que AutomationElement admite el patrón de RangeValuePattern control tiene su valor establecido en el valor máximo específico del control.

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

Consulte también

• Minimum