SelectionItemPattern.Select 方法

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

取消选择所有选定项，然后选择当前元素。

public:
 void Select();

public void Select ();

member this.Select : unit -> unit

Public Sub Select ()

示例

以下示例演示如何通过指定项的文本来选择容器中的项。

///--------------------------------------------------------------------
/// <summary>
/// Selects a string item in a container.
/// </summary>
/// <param name="selectionContainer">The selection container.</param>
/// <param name="itemText">The text to select.</param>
/// <remarks>
/// This deselects any currently selected items. 
/// To add the item to the current selection in a multiselect list, 
/// use AddToSelection instead of Select.
/// </remarks>
///--------------------------------------------------------------------
public void SelectListItem(
    AutomationElement selectionContainer, String itemText)
{
    if ((selectionContainer == null) || (itemText == ""))
    {
        throw new ArgumentException(
            "Argument cannot be null or empty.");
    }

    Condition propertyCondition = new PropertyCondition(
        AutomationElement.NameProperty, 
        itemText, 
        PropertyConditionFlags.IgnoreCase);

    AutomationElement firstMatch = 
        selectionContainer.FindFirst(TreeScope.Children, propertyCondition);

    if (firstMatch != null)
    {
        try
        {
            SelectionItemPattern selectionItemPattern;
            selectionItemPattern = 
            firstMatch.GetCurrentPattern(
            SelectionItemPattern.Pattern) as SelectionItemPattern;
            selectionItemPattern.Select();
        }
        catch (InvalidOperationException)
        {
            // Unable to select
            return;
        }
    }
}

'''--------------------------------------------------------------------
''' <summary>
''' Selects a string item in a container.
''' </summary>
''' <param name="selectionContainer">The selection container.</param>
''' <param name="itemText">The text to select.</param>
''' <remarks>
''' This deselects any currently selected items. 
''' To add the item to the current selection in a multiselect list, 
''' use AddToSelection instead of Select.
''' </remarks>
'''--------------------------------------------------------------------
Public Sub SelectListItem( _
ByVal selectionContainer As AutomationElement, ByVal itemText As String)
    If selectionContainer Is Nothing OrElse itemText = "" Then
        Throw New ArgumentException("Argument cannot be null or empty.")
    End If

    Dim propertyCondition = _
    New PropertyCondition(AutomationElement.NameProperty, _
    itemText, PropertyConditionFlags.IgnoreCase)

    Dim firstMatch As AutomationElement = _
    selectionContainer.FindFirst(TreeScope.Children, propertyCondition)

    If Not (firstMatch Is Nothing) Then
        Try
            Dim selectionItemPattern As SelectionItemPattern
            selectionItemPattern = DirectCast( _
            firstMatch.GetCurrentPattern(selectionItemPattern.Pattern), _
            SelectionItemPattern)
            selectionItemPattern.Select()
        Catch
            ' Unable to select
            Return
        End Try
    End If
End Sub