Convert Word document to Image in WinUI

8 Dec 202310 minutes to read

Syncfusion DocIO is a WinUI Word library used to create, read, edit, and convert Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can convert Word document to image in WinUI.

Prerequisites

To use the WinUI 3 project templates, install the Windows App SDK extension for Visual Studio. For more details, refer here.

WinUI Desktop app

Step 1: Create a new C# WinUI Desktop app. Select Blank App, Packaged with WAP (WinUI 3 in Desktop) from the template and click the Next button.

Step 2: Enter the project name and click Create.

Step 3: Install Syncfusion.DocIORenderer.NET NuGet package as a reference to your WinUI Desktop application from the NuGet.org.

NOTE

Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering a Syncfusion license key in your application to use our components.

Step 4: Add a new button to the MainWindow.xaml as shown below.

C#

<Window
    x:Class="Convert_Word_Document_to_Image.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Convert_Word_Document_to_Image"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
        <Button x:Name="button" Click="ConvertWordtoImage">Convert Word to Image</Button>
    </StackPanel>
</Window>

Step 5: Include the following namespaces in the MainWindow.xaml.cs file.

C#

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;
using Syncfusion.DocIORenderer;

Step 6: Add a new action method ConvertWordtoImage in MainWindow.xaml.cs and include the below code snippet to convert the Word document to image.

C#

//Loading an existing Word document
Assembly assembly = typeof(App).GetTypeInfo().Assembly;
using (WordDocument document = new WordDocument(assembly.GetManifestResourceStream("Convert_Word_Document_to_Image.Assets.Input.docx"), FormatType.Docx))
{
    //Instantiation of DocIORenderer for Word to image conversion
    using (DocIORenderer render = new DocIORenderer())
    {
        //Convert the first page of the Word document into an image.
        Stream imageStream = document.RenderAsImages(0, ExportImageFormat.Jpeg);
        //Reset the stream position.
        imageStream.Position = 0;
        // Saves and launch the file.
        SaveHelper.SaveAndLaunch("WordToImage.Jpeg", imageStream as MemoryStream);
    }
}

Save Image in WinUI

C#

/// <summary>
/// Saves and launch the file.
/// </summary>
/// <param name="filename">File name.</param>
/// <param name="stream">Stream to save.</param>
public static async void SaveAndLaunch(string filename, MemoryStream stream)
{
    StorageFile storageFile;
    string extension = Path.GetExtension(filename);
    //Gets process windows handle to open the dialog in application process.
    IntPtr windowHandle = System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle;
    if (!Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons"))
    {
        FileSavePicker savePicker = new();
        if (extension == ".Jpeg")
        {
            savePicker.DefaultFileExtension = ".jpeg";
            savePicker.SuggestedFileName = filename;
            //Saves the file as image file.
            savePicker.FileTypeChoices.Add("JPEG", new List<string>() { ".jpeg" });
        }

        WinRT.Interop.InitializeWithWindow.Initialize(savePicker, windowHandle);
        storageFile = await savePicker.PickSaveFileAsync();
    }
    else
    {
        StorageFolder local = ApplicationData.Current.LocalFolder;
        storageFile = await local.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
    }
    if (storageFile != null)
    {
        try
        {
            using (IRandomAccessStream zipStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite))
            {
                //Writes compressed data from memory to file.
                using Stream outstream = zipStream.AsStreamForWrite();
                outstream.SetLength(0);
                byte[] buffer = stream.ToArray();
                outstream.Write(buffer, 0, buffer.Length);
                outstream.Flush();
            }
            //Creates message dialog box. 
            MessageDialog msgDialog = new("Do you want to view the Image?", "File has been created successfully");
            UICommand yesCmd = new("Yes");
            msgDialog.Commands.Add(yesCmd);
            UICommand noCmd = new("No");
            msgDialog.Commands.Add(noCmd);

            WinRT.Interop.InitializeWithWindow.Initialize(msgDialog, windowHandle);

            //Showing a dialog box. 
            IUICommand cmd = await msgDialog.ShowAsync();
            if (cmd.Label == yesCmd.Label)
            {
                if (extension == ".md")
                {
                    Windows.System.LauncherOptions options = new Windows.System.LauncherOptions();
                    options.DisplayApplicationPicker = true;
                    // Launch the file with "Open with" option.
                    await Windows.System.Launcher.LaunchFileAsync(storageFile, options);
                }
                else
                    //Launch the saved file. 
                    await Windows.System.Launcher.LaunchFileAsync(storageFile);
            }
        }
        catch (Exception ex)
        {
            if (ex.Message.Contains("Access is denied."))
            {
                //Creates message dialog box.
                MessageDialog msgDialogBox = new("Access to the given path is denied. Please enable permission to save the file in that folder or save the file in another location.", "Access Denied");
                UICommand okCmd = new("Ok");
                msgDialogBox.Commands.Add(okCmd);
                WinRT.Interop.InitializeWithWindow.Initialize(msgDialogBox, windowHandle);
                //Showing a dialog box. 
                IUICommand msgCmd = await msgDialogBox.ShowAsync();
            }
        }
    }
}

You can download a complete working sample from GitHub.

By executing the program, you will get the image as follows.

Click here to explore the rich set of Syncfusion Word library (DocIO) features.

An online sample link to convert Word document to image in ASP.NET Core.