ScrollPattern.NoScroll Campo

Definición

Espacio de nombres:

System.Windows.Automation

Ensamblado:

UIAutomationClient.dll

Especifica que el desplazamiento no debe realizarse.

public: double NoScroll = -1;

public const double NoScroll = -1;

val mutable NoScroll : double

Public Const NoScroll As Double  = -1

Valor de campo

Value = -1

Double

Ejemplos

En el ejemplo siguiente, se obtiene un ScrollPattern patrón de control de y AutomationElement , a continuación, se usa para desplazar la región visible a la parte superior del área de contenido.

///--------------------------------------------------------------------
/// <summary>
/// Obtains a ScrollPattern control pattern from an automation 
/// element and attempts to scroll to the top of the
/// viewfinder.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
///--------------------------------------------------------------------
private void ScrollToTop(AutomationElement targetControl)
{
    if (targetControl == null)
    {
        throw new ArgumentNullException(
            "AutomationElement argument cannot be null.");
    }

    ScrollPattern scrollPattern = GetScrollPattern(targetControl);

    try
    {
        scrollPattern.SetScrollPercent(ScrollPattern.NoScroll, 0);
    }
    catch (InvalidOperationException)
    {
        // Control not able to scroll in the direction requested;
        // when scrollable property of that direction is False
        // TO DO: error handling.
    }
    catch (ArgumentOutOfRangeException)
    {
        // A value greater than 100 or less than 0 is passed in 
        // (except -1 which is equivalent to NoScroll).
        // TO DO: error handling.
    }
}

'''--------------------------------------------------------------------
''' <summary>
''' Obtains a ScrollPattern control pattern from an automation 
''' element and attempts to scroll to the top of the
''' viewfinder.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
'''--------------------------------------------------------------------
Private Sub ScrollToTop(ByVal targetControl As AutomationElement) 
    If targetControl Is Nothing Then
        Throw New ArgumentNullException( _
        "AutomationElement argument cannot be null.")
    End If
    
    Dim scrollPattern As ScrollPattern = GetScrollPattern(targetControl)
    
    Try
        scrollPattern.SetScrollPercent(ScrollPattern.NoScroll, 0)
    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 ArgumentOutOfRangeException
        ' A value greater than 100 or less than 0 is passed in 
        ' (except -1 which is equivalent to NoScroll).
        ' TO DO: error handling.
    End Try

End Sub

Comentarios

Las aplicaciones cliente de Automatización de la interfaz de usuario usan este identificador. Los proveedores de automatización de la interfaz de usuario deben usar el campo equivalente en ScrollPatternIdentifiers.

El valor -1 se puede sustituir por el NoScroll campo.