How to delete the page numbering in an existing DOCX document using C# and .NET

  1. Add SautinSoft.Document from Nuget.
  2. Load a DOCX document.
  3. Find fields: Page and NumPages.
  4. Remove all inlines in paragraph.
  5. Save the document.

Complete code

using System;
using System.Collections.Generic;
using System.Linq;
using SautinSoft.Document;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {
            // Get your free 30-day key here:   
            // https://sautinsoft.com/start-for-free/

            DeletePageNumbering();
        }
        /// <summary>
        /// How to delete the page numbering in an existing DOCX document. 
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/remove-page-numbering-in-docx-document-net-csharp-vb.php
        /// </remarks>
        public static void DeletePageNumbering()
        {
            string inpFile = @"..\..\..\PageNumbering.docx";
            // Save the output document into PDF format,
            // you may change it to any from: DOCX, HTML, PDF, RTF.
            string outFile = @"PageNumbering - deleted.pdf";

            // Load a document from DOCX file (PageNumbering.docx).
            // We've created PageNumbering.docx in the previous example.
            DocumentCore dc = DocumentCore.Load(inpFile);
            Section s = dc.Sections[0];

            foreach (HeaderFooter hf in s.HeadersFooters)
            {
                foreach (Field field in hf.GetChildElements(true, ElementType.Field).Reverse())
                {
                    // Page numbering is a Field,
                    // so we have to find the fields with the type Page or NumPages and remove.
                    if (field.FieldType == FieldType.Page || field.FieldType == FieldType.NumPages)
                    {
                        // Also assume that our page numbering located in a paragraph,
                        // so let's remove the paragraph's content too.
                        if (field.Parent is Paragraph)
                            (field.Parent as Paragraph).Inlines.Clear();

                        // If we'll delete only the fields (field.Content.Delete()), our paragraph
                        // may contain text "Page of ".
                        // Based on this, we remove the whole paragraph.
                    }
                }
            }
            dc.Save(outFile);

            // Open the result for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(inpFile) { UseShellExecute = true });
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
        }
    }
}

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Imports System
Imports System.IO
Imports System.Collections.Generic
Imports System.Linq
Imports SautinSoft.Document

Module Sample
    Sub Main()
        DeletePageNumbering()
    End Sub
    ''' Get your free 30-day key here:   
    ''' https://sautinsoft.com/start-for-free/
    ''' <summary>
    ''' How to delete the page numbering in an existing DOCX document. 
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/remove-page-numbering-in-docx-document-net-csharp-vb.php
    ''' </remarks>
    Sub DeletePageNumbering()
        Dim inpFile As String = "..\..\..\PageNumbering.docx"
        ' Save the output document into PDF format,
        ' you may change it to any from: DOCX, HTML, PDF, RTF.
        Dim outFile As String = "PageNumbering - deleted.pdf"

        ' Load a document from DOCX file (PageNumbering.docx).
        ' We've created PageNumbering.docx in the previous example.
        Dim dc As DocumentCore = DocumentCore.Load(inpFile)
        Dim s As Section = dc.Sections(0)

        For Each hf As HeaderFooter In s.HeadersFooters
            For Each field As Field In hf.GetChildElements(True, ElementType.Field).Reverse()
                ' Page numbering is a Field,
                ' so we have to find the fields with the type Page or NumPages and remove.
                If field.FieldType = FieldType.Page OrElse field.FieldType = FieldType.NumPages Then
                    ' Also assume that our page numbering located in a paragraph,
                    ' so let's remove the paragraph's content too.
                    If TypeOf field.Parent Is Paragraph Then
                        TryCast(field.Parent, Paragraph).Inlines.Clear()
                    End If

                    ' If we'll delete only the fields (field.Content.Delete()), our paragraph
                    ' may contain text "Page of ".
                    ' Based on this, we remove the whole paragraph.
                End If
            Next field
        Next hf
        dc.Save(outFile)

        ' Open the result for demonstration purposes.
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(inpFile) With {.UseShellExecute = True})
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
    End Sub
End Module

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