OnlyOffice Control for ASP.NET

Seamlessly integrate OnlyOffice Document Server into your ASP.NET Web Forms applications with full editing, viewing, and PDF conversion capabilities.

Get Started API Reference

Quick Start

Get your OnlyOffice editor up and running in minutes

Add the control to your page

<%@ Register Src="~/Controls/OnlyOfficeEditor/OnlyOfficeEditor.ascx" 
             TagPrefix="oo" TagName="Editor" %>

<oo:Editor ID="docEditor" runat="server" />

Configure the control

Set the required properties in your code-behind or inline:

docEditor.OnlyOfficeApiUrl = "https://your-onlyoffice-server/web-apps/apps/api/documents/api.js";
docEditor.JwtSecret = "your-jwt-secret";
docEditor.PublicBaseUrl = "https://your-app-url";
docEditor.Mode = "edit"; // or "view"

Load a document

Use one of the available methods to load a document into the editor:

// From uploaded file
if (fileUpload.HasFile)
{
    docEditor.SetDocumentFromBytes(
        fileUpload.FileBytes, 
        fileUpload.FileName
    );
}

// From server file
docEditor.SetDocumentFromFile(
    Server.MapPath("~/documents/sample.docx")
);

Handle document changes

Retrieve edited documents and convert to PDF if needed:

protected void btnDownload_Click(object sender, EventArgs e)
{
    // Get edited document
    byte[] documentBytes = docEditor.GetEditedDocumentBytes();
    
    // Or convert to PDF
    byte[] pdfBytes = docEditor.ConvertCurrentDocumentToPdfBytes();
    
    // Download
    Response.ContentType = "application/pdf";
    Response.AddHeader("Content-Disposition", "attachment; filename=document.pdf");
    Response.BinaryWrite(pdfBytes);
    Response.End();
}