संपादित करें

इसके माध्यम से साझा किया गया

RichTextBox.CaretPosition Property

  • Reference

Definition

Namespace:
System.Windows.Controls
Assembly:
PresentationFramework.dll

Gets or sets the position of the input caret.

public:
 property System::Windows::Documents::TextPointer ^ CaretPosition { System::Windows::Documents::TextPointer ^ get(); void set(System::Windows::Documents::TextPointer ^ value); };
public System.Windows.Documents.TextPointer CaretPosition { get; set; }
member this.CaretPosition : System.Windows.Documents.TextPointer with get, set
Public Property CaretPosition As TextPointer

Property Value

TextPointer

A TextPointer object specifying the position of the input caret.

By default, the caret is at the first insertion position at the beginning of the content hosted by the RichTextBox. See TextPointer for more information on text position terminology like "insertion position".

Exceptions

ArgumentNullException

An attempt is made to set this property to null.

ArgumentException

An attempt is made to set this property to a TextPointer that references a position outside of the current document.

Examples

The following example illustrates the use of this property.


// Create a new FlowDocument, and add 3 paragraphs.
FlowDocument flowDoc = new FlowDocument();
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 1"))); 
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 2"))); 
flowDoc.Blocks.Add(new Paragraph(new Run("Paragraph 3")));
// Set the FlowDocument to be the content for a new RichTextBox.
RichTextBox rtb = new RichTextBox(flowDoc);

// Get the current caret position.
TextPointer caretPos = rtb.CaretPosition;

// Set the TextPointer to the end of the current document.
caretPos = caretPos.DocumentEnd;

// Specify the new caret position at the end of the current document.
rtb.CaretPosition = caretPos;


' Create a new FlowDocument, and add 3 paragraphs.
Dim flowDoc As New FlowDocument()
flowDoc.Blocks.Add(New Paragraph(New Run("Paragraph 1")))
flowDoc.Blocks.Add(New Paragraph(New Run("Paragraph 2")))
flowDoc.Blocks.Add(New Paragraph(New Run("Paragraph 3")))
' Set the FlowDocument to be the content for a new RichTextBox.
Dim rtb As New RichTextBox(flowDoc)

' Get the current caret position.
Dim caretPos As TextPointer = rtb.CaretPosition

' Set the TextPointer to the end of the current document.
caretPos = caretPos.DocumentEnd

' Specify the new caret position at the end of the current document.
rtb.CaretPosition = caretPos

Applies to

See also