Open and save Word document in ASP.NET Core

10 Nov 20233 minutes to read

Syncfusion DocIO is a .NET Core Word library used to create, read, and edit Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can open and save a Word document in ASP.NET Core.

Steps to open and save Word document programmatically:

Step 1: Create a new ASP.NET Core Web application project.

Create ASP.NET Core Web application in Visual Studio

Step 2: Select Web Application pattern (Model-View-Controller) for the project.

Select Web Application pattern

Step 3: Install the Syncfusion.DocIO.Net.Core NuGet package as a reference to your project from

Install Syncfusion.DocIO.Net.Core NuGet package


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 Syncfusion license key in your application to use our components.

Step 4: Include the following namespaces in the HomeController.cs file.

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

Step 5: A default action method named Index will be present in HomeController.cs. Right click on Index method and select Go To View where you will be directed to its associated view page Index.cshtml.

Step 6: Add a new button in the Index.cshtml as shown below.

@{Html.BeginForm("OpenAndSaveDocument", "Home", FormMethod.Get);
    <input type="submit" value="Open and Save Document" style="width:180px;height:27px" />

Step 7: Add a new action method OpenAndSaveDocument in HomeController.cs and include the below code snippet to open an existing Word document in ASP.NET Core.

//Open an existing Word document.
WordDocument document = new WordDocument(new FileStream("Input.docx", FileMode.Open, FileAccess.Read), FormatType.Automatic);

Step 8: Add below code example to add a paragraph in the Word document.

//Access the section in a Word document
IWSection section = document.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;

Step 9: Add below code example to save the Word document in ASP.NET Core.

//Save the Word document to MemoryStream.
MemoryStream stream = new MemoryStream();
document.Save(stream, FormatType.Docx);
stream.Position = 0;

//Download Word document in the browser.
return File(stream, "application/msword", "Sample.docx");

You can download a complete working sample from GitHub

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

ASP.Net Core output Word document

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