SharePoint 2013 Downloading a document library using C# and Microsoft.SharePoint.Client

References

using Microsoft.SharePoint.Client;
using Microsoft.SharePoint;
using SP = Microsoft.SharePoint.Client;
using System.IO;

Main program drive code

• Gets a list of documents from a document library
• Loops through the list of documents
• Checks if there is more than one version of the document
• Loops through the list of versions in a document library and calls downloadSharePointFile to download that version.

                        ListItemCollection collListItem = querySharePointList(list.Title);

                        foreach (ListItem oListItem in collListItem)

                        {                            

                            Console.WriteLine(string.Format("{0} - {1}", oListItem["FileLeafRef"], oListItem["FileRef"]));

                            context2013.Load(oListItem);

                            context2013.Load(oListItem.File);

                            context2013.Load(oListItem.File.Versions);

                            context2013.ExecuteQuery();

                            //if (oListItem.File.Versions.Count > 1)

                                //MessageBox.Show("More than one version");

                            if (oListItem.File.Versions.Count > 1)

                            {

                                foreach (FileVersion version in oListItem.File.Versions)

                                {

                                    Console.WriteLine(String.Format("Version no: {0} url - {1}", version.VersionLabel, version.Url));

                                    downloadSharePointFile(version.Url, oListItem["FileLeafRef"].ToString());

                                }

                            }

                            //downloadSharePointFile(oListItem["FileRef"].ToString(), oListItem["FileLeafRef"].ToString());

                        }

Query the document library for a list of all the documents in the document library

title - the name of the document library

        private ListItemCollection querySharePointList(string title)

        {

            SP.List oList = context2013.Web.Lists.GetByTitle(title);

            CamlQuery camlQuery = new CamlQuery();

            camlQuery.ViewXml = "5000";

            ListItemCollection collListItem = oList.GetItems(camlQuery);

            context2013.Load(collListItem);

            context2013.ExecuteQuery();

            return collListItem;

        }

Download the document from the document library

filename - url to the document

documentName - name of the document

        private void downloadSharePointFile(string filename, string documentName)

        {

            string baseUri = "base url of the sharepoint application";

            // Create a new WebClient instance.

            WebClient myWebClient = new WebClient();

            System.Net.NetworkCredential netCredential = new System.Net.NetworkCredential("username", "password", "domain name");

            myWebClient.Credentials = netCredential;

            // Concatenate the domain with the Web resource filename.

            // Download the Web resource and save it into the current filesystem folder.

            string fileUrl = baseUri  + "/" + filename;

            myWebClient.DownloadFile(fileUrl, @"c:\temp\" + documentName);

        }