How to find any Text and replace it with a Picture using C# and .NET

  1. Add SautinSoft.Document from Nuget.
  2. Load a DOCX document.
  3. Find a text and replace it by an image.
  4. Save the document.

Here we'll show you how to using the find and replace methods.

Our task is find the word - "signature " and change it with the Picture- "smile.png". We will use regular expressions (Regex).

A few steps:

  1. Notice you are importing the SautinSoft.Document namespace. 
    using SautinSoft.Document;
  2. First of all, create a DocumentCore object with name dc. 
    
DocumentCore dc = new DocumentCore();
    DocumentCore is root class, it represents a document itself.
  3. Using regular expressions, we'll find - "<signature>" (Signature, SIGNATURE, SiGnAtUrE, etc) and replace with the Picture - . 
    
            Regex regex = new Regex(@"<signature>", RegexOptions.IgnoreCase);
            Picture picture = new Picture(dc, InlineLayout.Inline(new Size(50, 50)), pictPath);
            foreach (ContentRange item in dc.Content.Find(regex).Reverse())
            {
                item.Replace(picture.Content);
            }
  4. Save our document into PDF format. 
    
            // Save our document into PDF format.
            string savePath = @"..\..\Replaced_signature.pdf";
            dc.Save(savePath, new PdfSaveOptions());
    Download the result PDF document: Replaced_signature.pdf

Complete code

using System.IO;
using SautinSoft.Document;
using SautinSoft.Document.Drawing;
using System.Linq;
using System.Text.RegularExpressions;

namespace Sample
{
    class Sample
    {

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

            FindTextAndReplaceImage();
        }

        /// <summary>
        /// Find Text and replace it with a Picture using ContentRange.
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/find-replace-content-net-csharp-vb.php
        /// </remarks>
        public static void FindTextAndReplaceImage()
        {
            // Path to a loadable document.
            string loadPath = @"..\..\..\Critique_signature.docx";
            string pictPath = @"..\..\..\Smile.png";

            // Load a document intoDocumentCore.
            DocumentCore dc = DocumentCore.Load(loadPath);

            //Find "<signature>" Text and Replace everywhere with the "Smile.png"
            // Please note, Reverse() makes sure that action replace not affects to Find().
            Regex regex = new Regex(@"<signature>", RegexOptions.IgnoreCase);
            Picture picture = new Picture(dc, InlineLayout.Inline(new Size(50, 50)), pictPath);
            foreach (ContentRange item in dc.Content.Find(regex).Reverse())
            {
                item.Replace(picture.Content);
            }

            // Save our document into PDF format.
            string savePath = @"..\..\Replaced_signature.pdf";
            dc.Save(savePath, new PdfSaveOptions());

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

Download

Imports System.IO
Imports SautinSoft.Document
Imports SautinSoft.Document.Drawing
Imports System.Linq
Imports System.Text.RegularExpressions

Namespace Sample
	Friend Class Sample

		Shared Sub Main(ByVal args() As String)
			FindTextAndReplaceImage()
		End Sub
                ''' Get your free 30-day key here:   
                ''' https://sautinsoft.com/start-for-free/

        ''' <summary>
        ''' Find Text and replace it with a Picture using ContentRange.
        ''' </summary>
        ''' <remarks>
        ''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/find-text-replace-image-content-net-csharp-vb.php
        ''' </remarks>
        Public Shared Sub FindTextAndReplaceImage()
			' Path to a loadable document.
			Dim loadPath As String = "..\..\..\Critique_signature.docx"
			Dim pictPath As String = "..\..\..\Smile.png"

			' Load a document intoDocumentCore.
			Dim dc As DocumentCore = DocumentCore.Load(loadPath)

			'Find "<signature>" Text and Replace everywhere with the "Smile.png"
			' Please note, Reverse() makes sure that action replace not affects to Find().
			Dim regex As New Regex("<signature>", RegexOptions.IgnoreCase)
			Dim picture As New Picture(dc, InlineLayout.Inline(New Size(50, 50)), pictPath)
			For Each item As ContentRange In dc.Content.Find(regex).Reverse()
				item.Replace(picture.Content)
			Next item

			' Save our document into PDF format.
			Dim savePath As String = "..\..\..\Replaced_signature.pdf"
			dc.Save(savePath, New PdfSaveOptions())

			' Open the result for demonstration purposes.
			System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(loadPath) With {.UseShellExecute = True})
			System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(savePath) With {.UseShellExecute = True})
		End Sub
	End Class
End Namespace

Download

If you need a new code example or have a question: email us at support@sautinsoft.com or ask at Online Chat (right-bottom corner of this page).