Hi Bozhday,
Thank you for your interest in Syncfusion products.
Essential DocIO provides support for updating field in Word documents. You can update the fields in word document by invoking UpdateDocumentFields() method of WordDocument class. Please do find the sample code to update fields in the word document using DocIO.
Code snippet:
// Opening the word document.
WordDocument document = new WordDocument("Input.doc");
// Updates the fields present in the document.
document.UpdateDocumentFields();
// Save the document.
document.Save("Sample.doc", FormatType.Doc);
For more information regarding field update support of DocIO, please refer our UG documentation and sample from the following location.
UG Documentation link:
http://help.syncfusion.com/ug_94/Reporting/DocIO/ASP.NET/default.htm?turl=Documents%2F44127fieldsupdatingengine.htmOnline sample link:
http://asp.syncfusion.com/sfaspnetsamplebrowser/9.4.0.62/Web/DocIO.Web/samples/4.0/Product%20Showcase/Update%20Fields/CS/UpdateFields.aspxPlease let us know if you have any other questions.
Regards,
Gunasekaran