Extract All Images from a Worksheet and Save Them as Files

Updated on Sep 14, 2026

Environment

Version	Product	Author
2026.3.812	RadSpreadsheet for WPF	Desislava Yordanova

Description

A common requirement when working with Excel spreadsheets imported into RadSpreadsheet is extracting all embedded images from the worksheets and saving them to disk as image files (such as PNG or JPEG).

Worksheets in a Workbook represent floating pictures and images via the Images collection on each Worksheet. Each item in worksheet.Images is a FloatingImage that exposes an ImageSource property containing the image format extension and the raw binary bytes (byte[]).

Solution

To extract and save all images from an imported XLSX file:

1. Import the workbook using XlsxFormatProvider.
2. Iterate through each Worksheet in workbook.Worksheets.
3. Iterate through worksheet.Images to access each FloatingImage.
4. Use image.ImageSource.Extension to determine the image format (such as png, jpeg).
5. Write image.ImageSource.Data to disk using File.WriteAllBytes().

Required Assembly References

Ensure your project references the following assemblies:

• Telerik.Windows.Documents.Spreadsheet
• Telerik.Windows.Documents.Spreadsheet.FormatProviders.OpenXml

Example

C#

using System;
using System.IO;
using Telerik.Windows.Documents.Spreadsheet.FormatProviders.OpenXml.Xlsx;
using Telerik.Windows.Documents.Spreadsheet.Model;

public static void ExtractImagesFromWorkbook(string workbookPath, string outputDirectory)
{
    // Load the workbook from a file stream
    var provider = new XlsxFormatProvider();
    Workbook workbook;
    using (var stream = File.OpenRead(workbookPath))
    {
        workbook = provider.Import(stream, null);
    }

    // Iterate through worksheets and save extracted images as files.
    Directory.CreateDirectory(outputDirectory);
    int imageNumber = 1;

    foreach (var worksheet in workbook.Worksheets)
    {
        foreach (var image in worksheet.Images)
        {
            var imageSource = image.ImageSource;
            string extension = imageSource.Extension.TrimStart('.');
            string outputPath = Path.Combine(outputDirectory, $"Image_{imageNumber}.{extension}");
            File.WriteAllBytes(outputPath, imageSource.Data);
            imageNumber++;
        }
    }
}

See Also

• Import/Export in RadSpreadsheet
• Worksheet Model in RadSpreadsheet
• Knowledge Base Articles