TextPointerContext Enum

Definisi

Ruang nama:

System.Windows.Documents

Rakitan:

PresentationFramework.dll

Menentukan kategori konten yang berdekatan dengan TextPointer dalam LogicalDirectiontertentu.

public enum class TextPointerContext

public enum TextPointerContext

type TextPointerContext = 

Public Enum TextPointerContext

Warisan

Object

ValueType

Enum

TextPointerContext

Bidang

Nama	Nilai	Deskripsi
None	0	TextPointer berdekatan dengan awal atau akhir konten.
Text	1	berdekatan TextPointer dengan teks.
EmbeddedElement	2	berdekatan TextPointer dengan yang disematkan UIElement atau ContentElement.
ElementStart	3	TextPointer berdekatan dengan tag pembuka dari TextElement.
ElementEnd	4	TextPointer berdekatan dengan tag penutup dari TextElement.

Contoh

// 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.

Lihat juga

• TextPointer