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TextPattern.GetVisibleRanges Method

Retrieves an array of disjoint text ranges from a text container where each text range begins with the first partially visible line through to the end of the last partially visible line.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public TextPatternRange[] GetVisibleRanges()

Return Value

Type: System.Windows.Automation.Text.TextPatternRange[]
The collection of visible text ranges within the container or an empty array. Null is never returned.

Disjoint text ranges may occur when any content of a text container is obscured by an overlapping window or other object, or when a text container with a multi-column layout has one or more columns partially scrolled out of view.

If no text is visible, a degenerate (empty) text range is returned. This empty range can be returned if the text container is empty or when all text is scrolled out of view.

private TextPatternRange[] CurrentVisibleRanges(AutomationElement target)
{
    // Specify the control type we're looking for, in this case 'Document'
    PropertyCondition cond = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Document);

    // target --> The root AutomationElement.
    AutomationElement textProvider = target.FindFirst(TreeScope.Descendants, cond);

    TextPattern textpatternPattern = textProvider.GetCurrentPattern(TextPattern.Pattern) as TextPattern;

    if (textpatternPattern == null)
    {
        Console.WriteLine("Root element does not contain a descendant that supports TextPattern.");
        return null;
    }
    return textpatternPattern.GetVisibleRanges();
}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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