ValuePattern.Pattern Field

Reference

Definition

Namespace:: System.Windows.Automation

Assembly:: UIAutomationClient.dll

Important

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Identifies the ValuePattern control pattern.

public: static initonly System::Windows::Automation::AutomationPattern ^ Pattern;

public static readonly System.Windows.Automation.AutomationPattern Pattern;

 staticval mutable Pattern : System.Windows.Automation.AutomationPattern

Public Shared ReadOnly Pattern As AutomationPattern

Field Value

AutomationPattern

Examples

In the following example, a ValuePattern control pattern is obtained from an AutomationElement.

///--------------------------------------------------------------------
/// <summary>
/// Obtains a ValuePattern control pattern from an 
/// automation element.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <returns>
/// A ValuePattern object.
/// </returns>
///--------------------------------------------------------------------
private ValuePattern GetValuePattern(
    AutomationElement targetControl)
{
    ValuePattern valuePattern = null;

    try
    {
        valuePattern =
            targetControl.GetCurrentPattern(
            ValuePattern.Pattern)
            as ValuePattern;
    }
    // Object doesn't support the ValuePattern control pattern
    catch (InvalidOperationException)
    {
        return null;
    }

    return valuePattern;
}

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

    Try
        valuePattern = DirectCast( _
        targetControl.GetCurrentPattern(valuePattern.Pattern), _
        ValuePattern)
    Catch
        Return Nothing
    End Try

    Return valuePattern

End Function 'GetValuePattern

Remarks

This identifier is used by UI Automation client applications. UI Automation providers should use the equivalent field in ValuePatternIdentifiers.

The pattern identifier is passed to methods such as GetCurrentPattern to retrieve the control pattern of interest from the specified AutomationElement.

Applies to

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