How To: Obtain a Specific Document Part

Apr 23, 2025
3 minutes to read

This example demonstrates how to retrieve the DocumentRange occupied by a specific document part.

Obtain Section Content

Use the Section.Range property to access the required section’s range.

Obtain Page Content

Call the DocumentLayout.GetPage method to iterate through the document pages. The LayoutPage.MainContentRange property returns the obtained page’s range as a FixedRange object. Call the SubDocument.CreateRange method to convert the retrieved FixedRange to DocumentRange.

C#
VB.NET

csharp

int pageCount = richEditControl1.DocumentLayout.GetPageCount();
for (int i = 0; i < pageCount; i++)
{
    LayoutPage layoutPage = richEditControl.DocumentLayout.GetPage(i);
    FixedRange contentRange = layoutPage.MainContentRange;
    DocumentRange mainBodyRange =
         richEditControl.Document.CreateRange(contentRange.Start, contentRange.Length);
}

Private Sub SurroundingSub()
Dim pageCount As Integer = richEditControl1.DocumentLayout.GetPageCount()

For i As Integer = 0 To pageCount - 1
  Dim layoutPage As LayoutPage = richEditControl.DocumentLayout.GetPage(i)
  Dim contentRange As FixedRange = layoutPage.MainContentRange
  Dim mainBodyRange As DocumentRange =
     richEditControl.Document.CreateRange(contentRange.Start, contentRange.Length)
Next
End Sub

Obtain Paragraphs with Headings

Applying the Heading style to the paragraph changes its outline level. Find all paragraphs with the required Paragraph.OutlineLevel property value. Then obtain the range located between these paragraphs (including the paragraph with the heading).

C#
VB.NET

csharp

Document document = richEditControl1.Document;
List<Paragraph> paragraphs = document.Paragraphs.Where(paragraph => paragraph.OutlineLevel == 1).ToList();
for (int i = 0; i < paragraphs.Count; i++)
{
  DocumentRange range;
  DocumentPosition startPos = paragraphs[i].Range.Start;
  if (i == paragraphs.Count - 1)
    range = document.CreateRange(startPos, document.Range.End.ToInt() - startPos.ToInt());
  else
    range = document.CreateRange(startPos, paragraphs[i + 1].Range.Start.ToInt() - startPos.ToInt());
}

Dim document As Document = richEditControl1.Document
Dim paragraphs As List(Of Paragraph) = document.Paragraphs.Where(Function(paragraph) paragraph.OutlineLevel = 1).ToList()

For i As Integer = 0 To paragraphs.Count - 1
Dim range As DocumentRange
Dim startPos As DocumentPosition = paragraphs(i).Range.Start

  If i = paragraphs.Count - 1 Then
    range = document.CreateRange(startPos, document.Range.[End].ToInt() - startPos.ToInt())
  Else
    range = document.CreateRange(startPos, paragraphs(i + 1).Range.Start.ToInt() - startPos.ToInt())
  End If
Next