How To: Obtain Specific Document Part

Sep 25, 2025
3 minutes to read

You can use the following approaches to get a DocumentRange occupied by a specific document part:

Get the Section Range

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

Get the Page Range

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 = richEditControl1.DocumentLayout.GetPage(i);
    DocumentRange mainBodyRange = richEditControl1.Document.CreateRange(layoutPage.MainContentRange.Start, layoutPage.MainContentRange.Length);                                
}

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

    For i As Integer = 0 To pageCount - 1
        Dim layoutPage As LayoutPage = richEditControl1.DocumentLayout.GetPage(i)
        Dim mainBodyRange As DocumentRange = richEditControl1.Document.CreateRange(layoutPage.MainContentRange.Start, layoutPage.MainContentRange.Length)
    Next
End Sub

Get the Range of Paragraphs with Headings (if Heading1, Heading2, etc. style is applied to the 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