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SelectionItemPattern.SelectionItemPatternInformation.IsSelected الخاصية

Visual Studio 2010

الحصول على القيمة تشير إلى ما إذا كان العنصر هو المحدد.

مساحة الاسم:  System.Windows.Automation
التجميع:  UIAutomationClient (في UIAutomationClient.dll)

public bool IsSelected { get; }

قيمة الخاصية

النوع: System.Boolean
true إذا كان العنصر هو المحدد؛ otherwهوefalse.

يوضح المثال التالي كيفية إلى إزالة عنصر من المجموعة عناصر المحددة حاليا.


///--------------------------------------------------------------------
/// <summary>
/// Retrieves the selection container for a selection item.
/// </summary>
/// <param name="selectionItem">
/// An automation element that supports SelectionItemPattern.
/// </param>
///--------------------------------------------------------------------
private AutomationElement GetSelectionItemContainer(
    AutomationElement selectionItem)
{
    // Selection item cannot be null
    if (selectionItem == null)
    {
        throw new ArgumentException();
    }

    SelectionItemPattern selectionItemPattern = 
        selectionItem.GetCurrentPattern(SelectionItemPattern.Pattern) 
        as SelectionItemPattern;
    if (selectionItemPattern == null)
    {
        return null;
    }
    else
    {
        return selectionItemPattern.Current.SelectionContainer; 
    }
}


...


///--------------------------------------------------------------------
/// <summary>
/// Attempts to remove the current item from a collection 
/// of selected items. 
/// </summary>
/// <param name="selectionItem">
/// An automation element that supports SelectionItemPattern.
/// </param>
///--------------------------------------------------------------------
private void RemoveItemFromSelection(AutomationElement selectionItem)
{
    if (selectionItem == null)
    {
        throw new ArgumentNullException(
            "Argument cannot be null or empty.");
    }

    AutomationElement selectionContainer =
        GetSelectionItemContainer(selectionItem);

    // Selection container cannot be null
    if (selectionContainer == null)
    {
        throw new ElementNotAvailableException();
    }

    SelectionPattern selectionPattern =
        selectionContainer.GetCurrentPattern(SelectionPattern.Pattern)
        as SelectionPattern;

    if (selectionPattern == null)
    {
        return;
    }

    // Check if a selection is required
    if (selectionPattern.Current.IsSelectionRequired && 
        (selectionPattern.Current.GetSelection().GetLength(0) <= 1))
    {
        return;
    }

    SelectionItemPattern selectionItemPattern =
        selectionItem.GetCurrentPattern(
        SelectionItemPattern.Pattern)
        as SelectionItemPattern;
    if ((selectionItemPattern != null) && 
        selectionItemPattern.Current.IsSelected)
    {
        try
        {
            selectionItemPattern.RemoveFromSelection();
        }
        catch (InvalidOperationException)
        {
            // Unable to remove from selection
            return;
        }
    }
}


نظام التشغيل Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008, نظام التشغيل Windows Server 2003

لا يدعم .NET Framework و .NET Compact Framework كافة الإصدارات الخاصة بكل نظام أساسي. للحصول على قائمة بالإصدارات المدعمة، راجع متطلبات النظام إطار عمل .NET.

.NET Framework

مدعوم في: 4, 3.5, 3.0

NET Framework. Client Profile

مدعوم في: 4
إظهار: