TextPointerContext Enum
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Bepaalt de categorie inhoud die grenst aan een TextPointer in een opgegeven LogicalDirection.
public enum class TextPointerContextpublic enum TextPointerContexttype TextPointerContext = Public Enum TextPointerContext- Overname
Velden
| Name | Waarde | Description |
|---|---|---|
| None | 0 | De TextPointer staat naast het begin of einde van de inhoud. |
| Text | 1 | De TextPointer staat naast tekst. |
| EmbeddedElement | 2 | De TextPointer bevindt zich naast een ingesloten UIElement of ContentElement. |
| ElementStart | 3 | De TextPointer staat naast de openingstag van een TextElement. |
| ElementEnd | 4 | De TextPointer staat naast de afsluitende tag van een TextElement. |
Voorbeelden
// 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.
