ValuePattern.ValueProperty Campo

  • Riferimento

Definizione

Spazio dei nomi:
System.Windows.Automation
Assembly:
UIAutomationClient.dll

Identifica la proprietà Value.

public: static initonly System::Windows::Automation::AutomationProperty ^ ValueProperty;
public static readonly System.Windows.Automation.AutomationProperty ValueProperty;
 staticval mutable ValueProperty : System.Windows.Automation.AutomationProperty
Public Shared ReadOnly ValueProperty As AutomationProperty

Valore del campo

AutomationProperty

Esempio

Nell'esempio seguente viene passato un ValuePattern oggetto ottenuto da un controllo di destinazione in una funzione che recupera i valori correnti ValuePattern della proprietà.

///--------------------------------------------------------------------
/// <summary>
/// Gets the current property values from target.
/// </summary>
/// <param name="valuePattern">
/// A ValuePattern control pattern obtained from 
/// an automation element representing a target control.
/// </param>
/// <param name="automationProperty">
/// The automation property of interest.
/// </param>
///--------------------------------------------------------------------
private object GetValueProperty(
    ValuePattern valuePattern,
    AutomationProperty automationProperty)
{
    if (valuePattern == null || automationProperty == null)
    {
        throw new ArgumentNullException("Argument cannot be null.");
    }

    if (automationProperty.Id ==
        ValuePattern.ValueProperty.Id)
    {
        return valuePattern.Current.Value;
    }
    return null;
}

'''--------------------------------------------------------------------
''' <summary>
''' Gets the current property values from target.
''' </summary>
''' <param name="valuePattern">
''' A ValuePattern control pattern obtained from 
''' an automation element representing a target control.
''' </param>
''' <param name="automationProperty">
''' The automation property of interest.
''' </param>
'''--------------------------------------------------------------------
Private Function GetValueProperty( _
ByVal valuePattern As ValuePattern, _
ByVal automationProperty As AutomationProperty) As Object
    If (valuePattern Is Nothing Or automationProperty Is Nothing) Then
        Throw New ArgumentNullException("Argument cannot be null.")
    End If

    If automationProperty.Id = valuePattern.ValueProperty.Id Then
        Return valuePattern.Current.Value
    End If
    Return Nothing

End Function 'GetValueProperty

Commenti

Questo identificatore viene usato da Automazione interfaccia utente applicazioni client. Automazione interfaccia utente provider devono usare il campo equivalente in ValuePatternIdentifiers.

Si applica a

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