TextPointerContext Enumeration
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Bestimmt die Kategorie von Inhalt, der in einer angegebenen TextPointer an einen LogicalDirection grenzt.
public enum class TextPointerContextpublic enum TextPointerContexttype TextPointerContext = Public Enum TextPointerContext- Vererbung
Felder
| ElementEnd | 4 | Der TextPointer grenzt an ein Endtag eines TextElement. |
| ElementStart | 3 | Der TextPointer grenzt an ein Starttag eines TextElement. |
| EmbeddedElement | 2 | Der TextPointer grenzt an ein eingebettetes UIElement oder ContentElement. |
| None | 0 | Der TextPointer grenzt an den Anfang oder das Ende des Inhalts. |
| Text | 1 | Der TextPointer grenzt an Text. |
Beispiele
// This method will extract and return a string that contains a representation of
// the XAML structure of content elements in a given TextElement.
string GetXaml(TextElement element)
{
StringBuilder buffer = new StringBuilder();
// Position a "navigator" pointer before the opening tag of the element.
TextPointer navigator = element.ElementStart;
while (navigator.CompareTo(element.ElementEnd) < 0)
{
switch (navigator.GetPointerContext(LogicalDirection.Forward))
{
case TextPointerContext.ElementStart :
// Output opening tag of a TextElement
buffer.AppendFormat("<{0}>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name);
break;
case TextPointerContext.ElementEnd :
// Output closing tag of a TextElement
buffer.AppendFormat("</{0}>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name);
break;
case TextPointerContext.EmbeddedElement :
// Output simple tag for embedded element
buffer.AppendFormat("<{0}/>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name);
break;
case TextPointerContext.Text :
// Output the text content of this text run
buffer.Append(navigator.GetTextInRun(LogicalDirection.Forward));
break;
}
// Advance the naviagtor to the next context position.
navigator = navigator.GetNextContextPosition(LogicalDirection.Forward);
} // End while.
return buffer.ToString();
} // End GetXaml method.
' This method will extract and return a string that contains a representation of
' the XAML structure of content elements in a given TextElement.
Private Function GetXaml_Renamed(ByVal element As TextElement) As String
Dim buffer As New StringBuilder()
' Position a "navigator" pointer before the opening tag of the element.
Dim navigator As TextPointer = element.ElementStart
Do While navigator.CompareTo(element.ElementEnd) < 0
Select Case navigator.GetPointerContext(LogicalDirection.Forward)
Case TextPointerContext.ElementStart
' Output opening tag of a TextElement
buffer.AppendFormat("<{0}>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name)
Case TextPointerContext.ElementEnd
' Output closing tag of a TextElement
buffer.AppendFormat("</{0}>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name)
Case TextPointerContext.EmbeddedElement
' Output simple tag for embedded element
buffer.AppendFormat("<{0}/>", navigator.GetAdjacentElement(LogicalDirection.Forward).GetType().Name)
Case TextPointerContext.Text
' Output the text content of this text run
buffer.Append(navigator.GetTextInRun(LogicalDirection.Forward))
End Select
' Advance the naviagtor to the next context position.
navigator = navigator.GetNextContextPosition(LogicalDirection.Forward)
Loop ' End while.
Return buffer.ToString()
End Function ' End GetXaml method.