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Underline Constructor (TextPointer, TextPointer)

Initializes a new instance of the Underline class, taking two TextPointer objects that indicate the beginning and end of a selection of content to be contained by the new Underline.

Namespace:  System.Windows.Documents
Assembly:  PresentationFramework (in PresentationFramework.dll)

'Declaration
Public Sub New ( _
	start As TextPointer, _
	end As TextPointer _
)

Parameters

start
Type: System.Windows.Documents.TextPointer

A TextPointer indicating the beginning of a selection of content to be contained by the new Underline.

end
Type: System.Windows.Documents.TextPointer

A TextPointer indicating the end of a selection of content to be contained by the new Underline.

ExceptionCondition
ArgumentNullException

Raised when start or end is null.

ArgumentException

Raised when start and end do not resolve to a range of content suitable for enclosure by a Underline element, for example, if start and end indicate positions in different paragraphs.

This constructor is intended to initialize a new Underline element such that it encloses a selection of pre-existing content.

The following example demonstrates usage of this constructor.

' Create a paragraph and three text runs to serve as example content.  
Dim parx As New Paragraph()
Dim run1 As New Run("Text run 1.")
Dim run2 As New Run("Text run 2, make underlined.")
Dim run3 As New Run("Text run 3.")

' Add the three text runs to the paragraph, separated by linebreaks.
parx.Inlines.Add(run1)
parx.Inlines.Add(New LineBreak())
parx.Inlines.Add(run2)
parx.Inlines.Add(New LineBreak())
parx.Inlines.Add(run3)

' After this line executes, the selection of content
' indicated by the "start" and "end" parameters will be
' enclosed by the new Underline.  In this case, the new Underline
' will enclose the second text run, "run2".
Dim underx As New Underline(run2.ContentStart, run2.ContentEnd)

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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