How to: Append Text to the Paragraph

• Dec 12, 2022

The following code snippet appends text to the end of the current paragraph. Note that the DocumentPosition.BeginUpdateDocument call is required for proper operation within header/footer since it returns a SubDocument interface.

View Example: WinForms RichEdit Document API

Range.cs

Document document = richEditControl.Document;
document.BeginUpdate();
document.AppendText("First Paragraph\nSecond Paragraph\nThird Paragraph");
document.EndUpdate();

DocumentPosition pos = document.CaretPosition;
SubDocument doc = pos.BeginUpdateDocument();
Paragraph par = doc.Paragraphs.Get(pos);
DocumentPosition newPos = doc.CreatePosition(par.Range.End.ToInt() - 1);
doc.InsertText(newPos, "<<Appended to Paragraph End>>");
pos.EndUpdateDocument(doc);

Range.vb

document.BeginUpdate()
document.AppendText("First Paragraph" & vbLf & "Second Paragraph" & vbLf & "Third Paragraph")
document.EndUpdate()

Dim pos As DocumentPosition = document.CaretPosition
Dim doc As SubDocument = pos.BeginUpdateDocument()
Dim par As Paragraph = doc.Paragraphs.Get(pos)
Dim newPos As DocumentPosition = doc.CreatePosition(par.Range.End.ToInt() - 1)
doc.InsertText(newPos, "<<Appended to Paragraph End>>")
pos.EndUpdateDocument(doc)