programmatically Open and save documents in document library SharePoint

The example below has two functions, one for opening and one for saving a specific document in a document library. This code requires the Open XMl SDK, so you will need to download and install it and reference its assembly. In addition, you need to add a reference to the WindowsBase assembly and the Microsoft.SharePoint assembly.

Steps Involved are :

1.Reference the following assemblies in your project

using System.Text;
using System.Threading;
using Microsoft.SharePoint;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;

2. Call the OpenDocument function in your code.

Code :

protected void OpenDocument(string siteUrl)

using (SPSite spSite = new SPSite(siteUrl))

//Get the document from the library using SPQuery
SPList list = spSite.RootWeb.Lists["Shared Documents"];
SPQuery query = new SPQuery();
query.ViewFields ="<FieldRef Name='FileLeafRef' />";
query.Query ="<Where><Eq><FieldRef Name='FileLeafRef' /><Value Type='Text'>MyDoc.docx</Value></Eq></Where>";

SPListItemCollection collection = list.GetItems(query);

//Get the first document returned. There should be one only.
SPFile file = collection[0].File;
byte[] byteArray = file.OpenBinary();

using (MemoryStream memStr = new MemoryStream())
memStr.Write(byteArray, 0, byteArray.Length);

using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(memStr, true))

//Getting the document object
Document document = wordDoc.MainDocumentPart.Document;

// Read first paragraph

Paragraph firstParagraph = document.Body.Elements<Paragraph>().FirstOrDefault();

// Now lets append our own paragraph, if document already has text
if (firstParagraph != null)
Paragraph testParagraph = new Paragraph(

new Run(new Text("We are Adding this text for Testing!")));

//After your done. Lets just save it back. Call the SaveDoc method

3. Code for Saving the document back in SharePoint.

Protected void SavingDoc(SPFile file, MemoryStream memStr)
string linkFileName = string.empty;
linkFileName = file.Item["LinkFilename"].ToString();
file.ParentFolder.Files.Add(linkFileName, memStr, true);

To create and add a new document see my post Programmatically Create and upload document in Sharepoint 2010 document library


  1. What if the document is locked out? Can something like this be used to check it back in?



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