Open and Save Word document in AWS S3 Cloud Storage

4 Feb 202524 minutes to read

Prerequisites

AWS S3 Cloud Storage is required.

Open Word document from AWS S3

Steps to open a Word document from AWS S3 Cloud Storage.

Step 1: Create a new ASP.NET Core Web Application (Model-View-Controller).

Create a ASP.NET Core Web App project in visual studio

Step 2: Name the project.

Name the project

Step 3: Install the following Nuget packages in your application from NuGet.org.

Install Syncfusion.DocIO.Net.Core NuGet Package
Install AWSSDK.S3 NuGet Package

Step 4: Add a new button in the Index.cshtml as shown below.

CSHTML
@{Html.BeginForm("EditDocument", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Edit Document" style="width:150px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 5: Include the following namespaces in HomeController.cs.

C#
using Amazon.S3;
using Syncfusion.DocIO.DLS;

Step 6: Include the below code snippet in HomeController.cs to open a Word document from AWS S3 Cloud Storage.

C#
public async Task<IActionResult> EditDocument()
{
    try
    {
        //Retrieve the document from AWS S3
        MemoryStream stream = await GetDocumentFromS3();

        //Set the position to the beginning of the MemoryStream
        stream.Position = 0;

        //Create an instance of WordDocument
        using (WordDocument wordDocument = new WordDocument(stream, Syncfusion.DocIO.FormatType.Docx))
        {
            //Access the section in a Word document
            IWSection section = wordDocument.Sections[0];

            //Add new paragraph to the section
            IWParagraph paragraph = section.AddParagraph();
            paragraph.ParagraphFormat.FirstLineIndent = 36;
            paragraph.BreakCharacterFormat.FontSize = 12f;

            //Add new text to the paragraph
            IWTextRange textRange = paragraph.AppendText("In 2000, AdventureWorks Cycles bought a small manufacturing plant, Importadores Neptuno, located in Mexico. Importadores Neptuno manufactures several critical subcomponents for the AdventureWorks Cycles product line. These subcomponents are shipped to the Bothell location for final product assembly. In 2001, Importadores Neptuno, became the sole manufacturer and distributor of the touring bicycle product group.") as IWTextRange;
            textRange.CharacterFormat.FontSize = 12f;

            //Saving the Word document to a MemoryStream 
            MemoryStream outputStream = new MemoryStream();
            wordDocument.Save(outputStream, Syncfusion.DocIO.FormatType.Docx);

            //Download the Word file in the browser
            FileStreamResult fileStreamResult = new FileStreamResult(outputStream, "application/msword");
            fileStreamResult.FileDownloadName = "EditWord.docx";
            return fileStreamResult;
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Error: {ex.Message}");
        return Content("Error occurred while processing the file.");
    }
}

Download file from AWS S3 cloud storage

This is the helper method to download Word document from AWS S3 cloud storage.

C#
/// <summary>
/// Download file from AWS S3 cloud storage
/// </summary>
/// <returns></returns>
public async Task<MemoryStream> GetDocumentFromS3()
{
    //Your AWS Storage Account bucket name 
    string bucketName = "your-bucket-name";

    //Name of the Word file you want to load from AWS S3
    string key = "WordTemplate.docx";

    //Configure AWS credentials and region
    var region = Amazon.RegionEndpoint.USEast1;
    var credentials = new Amazon.Runtime.BasicAWSCredentials("your-access-key", "your-secret-key");
    var config = new AmazonS3Config
    {
        RegionEndpoint = region
    };

    try
    {
        using (var client = new AmazonS3Client(credentials, config))
        {
            //Create a MemoryStream to copy the file content
            MemoryStream stream = new MemoryStream();

            //Download the file from S3 into the MemoryStream
            var response = await client.GetObjectAsync(new Amazon.S3.Model.GetObjectRequest
            {
                BucketName = bucketName,
                Key = key
            });

            //Copy the response stream to the MemoryStream
            await response.ResponseStream.CopyToAsync(stream);

            return stream;
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Error retrieving document from S3: {ex.Message}");
        throw; // or handle the exception as needed
    }
}

You can download a complete working sample from GitHub.

By executing the program, you will get the Word document as follows.

Output Word document

Save Word document to AWS S3

Steps to save a Word document to AWS S3 Cloud Storage.