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

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

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)
        {
            FindTextAndReplaceImage();
        }

        /// <summary>
        /// Find Text and replace it with a Picture using ContentRange.
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/examples/find-text-replace-image-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 demonstation 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

		''' <summary>
		''' Find Text and replace it with a Picture using ContentRange.
		''' </summary>
		''' <remarks>
		''' Details: https://sautinsoft.com/products/document/examples/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 demonstation 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.

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