TextRange(TextPointer, TextPointer) Constructor

Reference

Definition

Namespace:: System.Windows.Documents

Assembly:: PresentationFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Initializes a new instance of the TextRange class, taking two specified TextPointer positions as the beginning and end positions for the new range.

public:
 TextRange(System::Windows::Documents::TextPointer ^ position1, System::Windows::Documents::TextPointer ^ position2);

public TextRange (System.Windows.Documents.TextPointer position1, System.Windows.Documents.TextPointer position2);

new System.Windows.Documents.TextRange : System.Windows.Documents.TextPointer * System.Windows.Documents.TextPointer -> System.Windows.Documents.TextRange

Public Sub New (position1 As TextPointer, position2 As TextPointer)

Parameters

position1: TextPointer

A fixed anchor position that marks one end of the selection used to form the new TextRange.

position2: TextPointer

A movable position that marks the other end of the selection used to form the new TextRange.

Exceptions

ArgumentException

Occurs when position1 and position2 are not positioned within the same document.

ArgumentNullException

Occurs when position1 or position2 is null.

Examples

The following example demonstrates the use of the TextRange constructor.

// This method returns a plain text representation of a specified FlowDocument.
string GetTextFromFlowDocument(FlowDocument flowDoc)
{
     // Create a new TextRanage that takes the entire FlowDocument as the current selection.
     TextRange flowDocSelection = new TextRange(flowDoc.ContentStart, flowDoc.ContentEnd);
      
     // Use the Text property to extract a string that contains the unformatted text contents 
     // of the FlowDocument.
     return flowDocSelection.Text;
}

' This method returns a plain text representation of a specified FlowDocument.
Private Function GetTextFromFlowDocument(ByVal flowDoc As FlowDocument) As String
    ' Create a new TextRanage that takes the entire FlowDocument as the current selection.
    Dim flowDocSelection As New TextRange(flowDoc.ContentStart, flowDoc.ContentEnd)

    ' Use the Text property to extract a string that contains the unformatted text contents 
    ' of the FlowDocument.
    Return flowDocSelection.Text
End Function

Remarks

A TextRange is formed from a selection between two positions indicated by TextPointers. One of these positions (indicated by position1) is fixed with respect to the selection, while the other position (indicated by position2) is movable. This is similar to how a selection made by a user using the mouse or keyboard behaves.

The actual ends of the new TextRange may be adjusted to match any selection heuristics that are applicable to the document that contains the new TextRange.

Applies to

Condividi tramite