SharePoint Object model books or resources

Hi,
I am recently learning sharepoint. I am very much familiar with the out of box features in MOSS 2007. I also new to the coding/IT. Can anyone suggest some proper resourses to learn sharepoint object model. I downloaded so many eBooks but no use. They got lot of theory. I would like to know what namespace, classes, objects are there when we use them in actual work etc. Any help would be appreciated. I hope you guys understand my problem.

Honestly you might get a lot out of the labs here: http://blogs.msdn.com/sharepoint/archive/2006/08/07/691466.aspx.
I would also recommend buying this book: http://www.amazon.com/Developers-SharePoint-Services-Platform-Programming/dp/1584505001.
(Developer's Guide to the Windows SharePoint Services v3 Platform (Charles River Media Programming - Todd Bleeker)
This book is amazing and lays out a lot of the object model, but it's only as good as you practice. I would build out some webparts and come up with some random projects on creating sites and doing other things programmatically. Practice really helped me more than anything. If you have questions feel free to ping me.

Similar Messages

How to execute powershell .ps1 file using sharepoint object model

Hi All,
Can some one please guide me, how can i execute .ps1 file with arguments using c# under sharepoint object model?
MercuryMan

Code example:
RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration);
runspace.Open();
RunspaceInvoke scriptInvoker = new RunspaceInvoke(runspace);
Pipeline pipeline = runspace.CreatePipeline();
//Here's how you add a new script with arguments
Command myCommand = new Command(scriptfile);
CommandParameter testParam = new CommandParameter("key","value");
myCommand.Parameters.Add(testParam);
pipeline.Commands.Add(myCommand);
// Execute PowerShell script
results = pipeline.Invoke();
See these links for more information:
http://stackoverflow.com/questions/527513/execute-powershell-script-from-c-sharp-with-commandline-arguments
http://www.codeproject.com/Articles/18229/How-to-run-PowerShell-scripts-from-C
Blog | SharePoint Learnings CodePlex Tools |
Export Version History To Excel |
Autocomplete Lookup Field

Create schedule using sharepoint object model

Hi All,
I have a requirement to generate one year schedule starting form 12/06/2014, for the group of employees using SharePoint object model. Requirement details below
We have three groups A, B and C. all the three groups’ holds 3 employees. pleasae see the below image.
Group A: always have “Saturday” and “Friday” as week end, and rest 5days are working days throughout the year.
Group B & C:
Will have “Saturday” and “Friday” as week end, and rest 5days are working days
Next week “Friday” as week end, and rest 6days are working days
It’s mandatory to start week from
Saturday and end with Friday. Can someone please suggest me how can i achieve this
MercuryMan

Hi,
You can achieve your demand using SharePoint Group Calendar:
For Group A:
Create a Repeating Schedule as below:
For Group B and Group C:
Create two Repeating Schedules as below:
Also you can have a look at the blog:
http://absolute-sharepoint.com/2014/06/create-color-coded-group-calendar-sharepoint-2013-step-step.html
Thanks,
Eric
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Eric Tao
TechNet Community Support

Custom wcf service that uses SharePoint Object Model.

Hi All,
I am writing a custom service on SharePoint. I have noticed most of the people do deploy the custom wcf service in layout folder in 12/14/15 hive. I am wondering is it mandatory? Can’t we deploy the custom wcf service that uses SharePoint Object Model as
virtual directory on a specific port?
Regards Restless Spirit

It is suggested to use WCF in 12/14/15 hive folder due to security and eas in use. Check below
http://www.dotnetcurry.com/showarticle.aspx?ID=760
http://msdn.microsoft.com/en-us/library/office/ff521584%28v=office.14%29.aspx
http://stackoverflow.com/questions/16008593/where-should-custom-wcf-service-for-sharepoint-2010-resides
If you want to use the server object model you have to host your WCF service on the same server as your SharePoint is installed on.
If the WCF service has to be on a different server you can use the client object model or the SharePoint webservices to communicate to SharePoint.
(link to a question about using server object model on different server
http://nikpatel.net/2012/02/29/step-by-step-building-custom-wcf-services-hosted-in-sharepoint-part-i/

List all users with full control on a SharePoint 2013 Sub site from SharePoint Object Model in C#

If I have a sub site URL and a user with Site Admin, can I list all users in that sub site that have Full Control at that level?
Any C# code sample?

Still you can do that, just pass the subsites to your code and from their you can find the users dynamically.
You could also use SPWeb.Users property to get users assigned to a subsite
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.users(v=office.15).aspx
alternatively you can also use SPWeb.SiteUsers to get all users
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.siteusers(v=office.15).aspx
other APIs of help-
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.associatedmembergroup(v=office.15).aspx
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spweb.associatedownergroup(v=office.15).aspx
http://sharepoint.stackexchange.com/questions/101671/object-model-list-all-users-with-full-control-on-a-sub-site-in-sharepoint-2013
Hope this helps!
Ram - SharePoint Architect
Blog - SharePointDeveloper.in
Please vote or mark your question answered, if my reply helps you

Sharepoint object model to upload a file programatically

Hi,
I want to upload a file programatically to document library and need to update column properties of that item.
The URL of that document is in different farm of sharepoint.
How to achieve this.
Thanks,
Siva.

Hi,
If you want to copy the document across site collections in SharePoint, we should open source file, then open destination site and web and use its Files collection to create new file in destination web. The following code for your reference:
public static void CopyFolderToAnotherSiteCollection(string sourceUrl, string destinationUrl, string listName, string folderUrl, string folderName)
string listRelatvieFolderUrl = folderUrl.Substring(folderUrl.IndexOf("/")+1);
using (SPSite sourceSite = new SPSite(sourceUrl))
using (SPWeb sourceWeb = sourceSite.OpenWeb())
SPFolder sourceFolder = sourceWeb.GetFolder(folderUrl);
using(SPSite destSite = new SPSite(destinationUrl))
using(SPWeb destWeb = destSite.OpenWeb())
SPListItem destItem = destWeb.Lists[listName].Items.
Add(string.Empty, SPFileSystemObjectType.Folder, listRelatvieFolderUrl);
destItem.Update();
SPFolder destFolder = destWeb.GetFolder(folderUrl);
foreach (SPFile file in sourceFolder.Files)
destFolder.Files.Add(file.Url, file.OpenBinary());
foreach (SPFolder folder in sourceFolder.SubFolders)
CopyFolderToAnotherSiteCollection(sourceUrl, destinationUrl, listName,
folder.Url, folder.Name);
More information is here:
http://sharepointfieldnotes.blogspot.com/2009/11/how-to-copy-files-across-site.html
Best Regards
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected]

Unable to update rating (rating column) on host document using JavaScript Object Model API inside sharepoint hosted apps

Hi Everyone,
We are developing SharePoint hosted apps for Office 365, for that we are going
to implement document rating functionality inside Sharepoint app. The host web contain document library (“Documents”) and from apps we need to rate each document. The rating functionality working fine with CQWP in team site using
JavaScript Object Model API.
But the same code is not working inside apps and giving error:-
If we are using app context than error will be:-
"List does not exist.
The page you selected contains a list that does not exist. It may have been deleted by another user."
And for Host context than error will be:-
"Unexpected response data from server."
Please help on this
Please see below code..
'use strict';
var web, list, listItems, hostUrl, videoId, output = "";
var videoLibrary = "Documents";
var context, currentContext;
var lists, listID;
var list, parentContext;
var scriptbase;
(function () {
// This code runs when the DOM is ready and creates a context object which is
// needed to use the SharePoint object model
$(document).ready(function () {
hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
context = SP.ClientContext.get_current();
SP.SOD.executeFunc('sp.js', 'SP.ClientContext', sharePointReady);
function sharePointReady() {
scriptbase = hostUrl + "/_layouts/15/";
// Load the js files and continue to the successHandler
$.getScript(scriptbase + "SP.Runtime.js", function () {
$.getScript(scriptbase + "SP.js", function () {
$.getScript(scriptbase + "SP.Core.js", function () {
$.getScript(scriptbase + "reputation.js", function () {
$.getScript(scriptbase + "sp.requestexecutor.js", execCrossDomainRequest);
//Query list from hostweb
function execCrossDomainRequest() {
//Load the list from hostweb
parentContext = new SP.AppContextSite(context, hostUrl);
web = parentContext.get_web();
list = web.get_lists().getByTitle(videoLibrary);
context.load(list, 'Title', 'Id');
var camlQuery = new SP.CamlQuery();
camlQuery.set_viewXml('<View><Query><OrderBy><FieldRef Name="Modified" Ascending="FALSE"/></OrderBy></Query><RowLimit>1</RowLimit></View>');
listItems = list.getItems(camlQuery);
context.load(listItems);
context.executeQueryAsync(onQuerySucceeded, onQueryFailed);
//Process the image library
function onQuerySucceeded() {
var lstID = list.get_id();
var ctx = new SP.ClientContext(hostUrl);
var ratingValue = 4;
EnsureScriptFunc('reputation.js', 'Microsoft.Office.Server.ReputationModel.Reputation', function() {
Microsoft.Office.Server.ReputationModel.Reputation.setRating(ctx, lstID, 1, ratingValue);
ctx.executeQueryAsync(RatingSuccess, RatingFailure);
function onQueryFailed(sender, args) {
alert('Failed' + args.get_message());
function failed(sender, args) {
alert("failed because:" + args.get_message());
function RatingSuccess() {
alert('rating set');
//displaystar();
function RatingFailure(sender, args) {
alert('Rating failed : : ' + args.get_message());
//Gets the query string paramter
function getQueryStringParameter(paramToRetrieve) {
var params;
params = document.URL.split("?")[1].split("&");
for (var i = 0; i < params.length; i = i + 1) {
var singleParam = params[i].split("=");
if (singleParam[0] == paramToRetrieve) return singleParam[1];
Thanks & Regards
Sanjay
Thank you in advance! :-)


Hi,
According to your post, my understanding is that you want to update list column in SharePoint hosted apps using JavaScript Client Object Model.
Based on the error message, it seems not retrieve the list object in context. I suggest you debug the code step by step using Internet Explorer Developer Tools to
find the problem.
Here are some demos about using JavaScript Client Object Model in SharePoint hosted app:
http://blogs.msdn.com/b/officeapps/archive/2012/09/04/using-the-javascript-object-model-jsom-in-apps-for-sharepoint.aspx
http://sharepoint.stackexchange.com/questions/55334/how-to-access-list-in-sharepoint-hosted-app
http://www.dotnetcurry.com/showarticle.aspx?ID=1028
Best regards
Zhengyu Guo
TechNet Community Support

Quering the database using Client Object Model

Hi,
I have to fetch the list items from a list named "Project Status" and display it in a table using
Client Object model.
The equivalent server side code is:
SPWeb web = SPContext.Current.Web;
SPList list = web.Lists["Project Status"];
DataTable dt1 = new DataTable();
try
if (list.ItemCount > 0)
DataColumn dc;
DataColumn dc1;
dc = new DataColumn("ProjectId", Type.GetType("System.String"));
dc1 = new DataColumn("Project Name", Type.GetType("System.String"));
dt1.Columns.Add(dc);
dt1.Columns.Add(dc1);
DataRow dr;
foreach (SPListItem item in list.Items)
dr = dt1.NewRow();
dr["ProjectId"] = item["ProjectId"];
dr["Project Name"] = item["Project Name"];
dt1.Rows.Add(dr);
Repeater1.DataSource = dt1;
Repeater1.DataBind();
catch (Exception Ex)
throw Ex;
1 more issue what i face is providing two links in the Visual WebPart and their navigate url is based on a condition that is fetched from the database. This corresponding code has to be converted to
Client Object Model.
string user = web.CurrentUser.LoginName;
string userID = user.Split(new char[] { '\\' })[1];
string connString = @"Data Source=NorthWind;Initial Catalog=EmployeeDB;User ID=sa;Password=Newuser123";
string query = "select * from EMPLOYEE_PROFILE";
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(query, conn);
try
conn.Open();
DataTable t1 = new DataTable();
using (SqlDataAdapter a = new SqlDataAdapter(cmd))
a.Fill(t1);
DataRow[] dr = t1.Select("PsNo = '" + userID + "'"); //This will select all rows where the Name Column has current user
foreach (DataRow r in dr)
string bU = r["DeputedBU"].ToString();
if (bU == "INS" || bU == "BFS")
lnkPM.NavigateUrl = web.Site.WebApplication.Sites[0].Url + "/Dashboard.aspx";
lnkSummary.NavigateUrl = web.Site.WebApplication.Sites[0].Url + "/DashboardWithHyperlinks.aspx";
else
lnkPM.Visible = false;
lnkSummary.Visible = false;
catch (Exception)
throw;
finally
conn.Close();
Any help would be appreciated.

Hi,
According to your post, there would be two questions in this single thread.
It is recommended to post one question in one single thread which will make others easier to focus on one question in one thread.
For the first question, you want to fetch list items and put into a DataTable object using Client Object Model.
To fetch list items from a list using Client Object Model, you can take a look at the code snippet below from MSDN:
http://msdn.microsoft.com/en-us/library/office/ee534956(v=office.14).aspx
For the second question, you might need to retrieve the User object and site collections object using Client Object Model.
However, if you can develop a Visual Web Part for your site, it means that you will be able to access the SharePoint Object Model which has more powerful APIs, so there is no
need to use Client Object Model in a Visual Web Part.
Best regards
Patrick Liang
TechNet Community Support

Regarding Server object Model in Custom Windows service

Hi,
I am writing a custom windows service to update the Sharepoint 2013 list every morning. But when i am try to create a SPSite object by passing the SITE URL it is throwing the below error.
Code :
using(SPSite site = new SPSite(SITE_URL))
Error :
"The Web application at "" could not be found. Verify that you have typed the URL correctly. If the URL should be serving existing content, the system administrator may need to add a new request URL mapping to the intended application."
Even though the SITE URL is correct. It working while browsing in explorer.
Not sure why it is happening.
Thanks.
Akhilesh Rao

Hi Akhilesh,
Please try to add yourself to the WSS_ADMIN_WPG group on the server.
Or here are the most common reasons this error can occur:
1.The code is executed on a different machine - The SharePoint object model (except the Client API) requires to be run on the SharePoint server itself. It is not possible to run the application on a server which is not within the same SharePoint farm the
code is trying to access.
2.Insufficient Rights on the site collection - The code is executed in context of an account which does not have read permission on the site collection
3.Incorrect Url being used - Verify that the site works correct in a browser and double check that the server is correct registered in the AAM settings
4.Incorrect bitness - The SharePoint object model needs to be executed with the same bitness as the operating system. That means you cannot use the SharePoint object model in a 32-bit application if the Operating System and SharePoint are installed as 64-bit
version. Ensure to compile the project using the correct bitness (64-bit on a 64-bit machine vs. 32-bit on a 32-bit machine)
5.Incorrect .NET framework version - Ensure that the project is configured to use .NET 3.5 for SharePoint 2010 and below and .NET 4.0 for SharePoint 2013
Best Regards
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected]

Conflict between Client object model and Item Updated Event Receiver in sharepoint 2010

Hello All,
As per my requirement I have a two custom list.
Agent Details
Port Name
Agent Details contains Agent code, Port Name, email, address and phone of Agent. Its possible that one Agent Code is connected with multiple Port Name.
Basically what I am doing is I am getting port name connected with Agent code, using jquery and bind those values with check box(using javascript created dynamically) and bind all with Div tag.
Now when my custom edit form of Agent list open up it shows me different port name binding with checkbox group.
when user select the check box and click confirm button my clicent object model script will run and add this selected value into Port Name list.
After confirm one more button named Save will enable asking user to edit the email, phone or address value and when I click on save my Item updated event fires which update the values of the selected port name(These port name I am getting from port
name list) to Agent Details custom list.
Now when I am trying to update the values my event receiver fires or some times it got stuck(not firing). So could you please help me the possible alternative for this requirements.
Can we user the Ecma Script(Client object model to preserve the value of selectec port) and Item updated event receiver on the same time?
Is anything am doing wrong then please guide me.

Hi,
As I understand, when you updated values in the agent details list the Item updated event receiver got stuck sometimes.
The item update event receiver will fire after the item has been saved, and the client object model script or the Ecma Script runs before the item is saved, so there is no conflict between the client object model script and item update event receiver.
You could find out the reason about the item update event receiver gets stuck by debugging the event receiver.
When you want to debug your event receivers, you have to attach to OWSTIMER.EXE and wait till they are executed. You can control this behavior using the Synchronization attribute. Also, if you’re looking for an easy way to debug an event receiver without
having to manually attach a debugger to your code, you can use the System.Diagnostics.Debugger.Launch() method.
The articles below are about how to debug in the event receiver in SharePoint 2010.
http://sharepoint-kings.blogspot.jp/2013/02/debugging-event-receivers-in-sharepoint.html
http://chakkaradeep.com/index.php/event-receivers-in-sharepoint-2010/
http://sharesaint.com/?p=77
Best regards,
Sara Fan
TechNet Community Support
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact
[email protected]

How to get all previous versions page contents of a publishing page using SharePoint Client Object Model 2010

How to get all previous versions page contents and other field values of a publishing page using SharePoint Client Object Model 2010?
Thanks,
Osmita

Hi Osmita,
Greetings.
Here are the links that helps you. It has code attached to it.
http://social.technet.microsoft.com/Forums/sharepoint/en-US/a0d2ab40-99ba-4368-8505-1dc559ef6469/get-content-of-previous-version-of-page-sharepoint-2010?forum=sharepointgeneralprevious
http://social.technet.microsoft.com/Forums/sharepoint/en-US/faaf419f-997e-4150-9911-48cc375c3b46/how-to-get-previous-published-versions-of-publishing-pages-in-sharepoint-2010?forum=sharepointdevelopmentprevious
Please remember to click 'Mark as Answer' on the answer if it helps you

How to create a Document Set in SharePoint 2013 using JavaScript Client Side Object Model (JSOM)?

Hi,
The requirement is to create ""Document Sets in Bulk" using JSOM. I am using the following posts:-
http://blogs.msdn.com/b/mittals/archive/2013/04/03/how-to-create-a-document-set-in-sharepoint-2013-using-javascript-client-side-object-model-jsom.aspx
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/1904cddb-850c-4425-8205-998bfaad07d7/create-document-set-using-ecma-script
But, when I am executing the code, I am getting error "Cannot read property 'DocumentSet' of undefined "..Please find
below my code. I am using Content editor web part and attached my JS file with that :-
<div>
<label>Enter the DocumentSet Name <input type="text" id="txtGetDocumentSetName" name="DocumentSetname"/> </label> </br>
<input type="button" id="btncreate" name="bcreateDocumentSet" value="Create Document Set" onclick="javascript:CreateDocumentSet()"/>
</div>
<script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js"> </script>
<script type="text/javascript">
SP.SOD.executeFunc('sp.js','SP.ClientContext','SP.DocumentSet','SP.DocumentManagement.js',CreateDocumentSet);
// This function is called on click of the “Create Document Set” button.
var ctx;
var parentFolder;
var newDocSetName;
var docsetContentType;
function CreateDocumentSet() {
alert("In ClientContext");
var ctx = SP.ClientContext.get_current();
newDocSetName = $('#txtGetDocumentSetName').val();
var docSetContentTypeID = "0x0120D520";
alert("docSetContentTypeID:=" + docSetContentTypeID);
var web = ctx.get_web();
var list = web.get_lists().getByTitle('Current Documents');
ctx.load(list);
alert("List Loaded !!");
parentFolder = list.get_rootFolder();
ctx.load(parentFolder);
docsetContentType = web.get_contentTypes().getById(docSetContentTypeID);
ctx.load(docsetContentType);
alert("docsetContentType Loaded !!");
ctx.executeQueryAsync(onRequestSuccess, onRequestFail);
function onRequestSuccess() {
alert("In Success");
SP.DocumentSet.DocumentSet.create(ctx, parentFolder, newDocSetName, docsetContentType.get_id());
alert('Document Set creation successful');
// This function runs if the executeQueryAsync call fails.
function onRequestFail(sender, args) {
alert("Document Set creation failed" + + args.get_message());
Please help !!
Vipul Jain

Hello,
I have already tried your solution, however in that case I get the error - "UncaughtSys.ArgumentNullException: Sys.ArgumentNullException:
Value cannot be null.Parameter name: context"...
Also, I tried removing SP.SOD.executeFunc
from my code, but no success :(
Kindly suggest !!!
Vipul Jain

Unable to get the SharePoint 2013 List names using Client object model for the input URL

Please can you help with this issue.
We are not able to get the SharePoint 2013 List names using Client object model for the input URL.
What we need is to use default credentials to authenticate user to get only those list which he has access to.
clientContext.Credentials = Net.CredentialCache.DefaultCredentials
But in this case we are getting error saying ‘The remote server returned an error: (401) Unauthorized.’
Instead of passing Default Credentials, if we pass the User credentials using:
clientContext.Credentials = New Net.NetworkCredential("Administrator", "password", "contoso")
It authenticates the user and works fine. Since we are developing a web part, it would not be possible to pass the user credentials. Also, the sample source code works perfectly fine on the SharePoint 2010 environment. We need to get the same functionality
working for SharePoint 2013.
We are also facing the same issue while authenticating PSI(Project Server Interface) Web services for Project Server 2013.
Can you please let us know how we can overcome the above issue? Please let us know if you need any further information from our end on the same.
Sample code is here: http://www.projectsolution.com/Data/Support/MS/SharePointTestApplication.zip
Regards, PJ Mistry (Email: [email protected] | Web: http://www.projectsolution.co.uk | Blog: EPMGuy.com)

Hi Mistry,
I sure that CSOM will authenticate without passing the
"clientContext.Credentials = Net.CredentialCache.DefaultCredentials" by default. It will take the current login user credentials by default. For more details about the CSOM operations refer the below link.
http://msdn.microsoft.com/en-us/library/office/fp179912.aspx
-- Vadivelu B Life with SharePoint

How to get list of users who all are having full access in sharepoint site using client object model c#

Hi,
I want to fetch the list of users who all are having full access to the sharepoint list using client object model with .Net
Please let me know if any property for the user object or any other way to get it.
Thanks in advance.

Here you are complete code i created from some years it lists all groups and users, you can just add a check in the permissions loop to see if it is equal to Full Control.
Private void GetData(object obj)
MyArgs args = obj as MyArgs;
try
if (args == null)
return; // called without parameters or invalid type
using (ClientContext clientContext = new ClientContext(args.URL))
// clientContext.AuthenticationMode = ClientAuthenticationMode.;
NetworkCredential credentials = new NetworkCredential(args.UserName, args.Password, args.Domain);
clientContext.Credentials = credentials;
RoleAssignmentCollection roles = clientContext.Web.RoleAssignments;
ListViewItem lvi;
ListViewItem.ListViewSubItem lvsi;
ListViewItem lvigroup;
ListViewItem.ListViewSubItem lvsigroup;
clientContext.Load(roles);
clientContext.ExecuteQuery();
foreach (RoleAssignment orole in roles)
clientContext.Load(orole.Member);
clientContext.ExecuteQuery();
//name
//MessageBox.Show(orole.Member.LoginName);
lvi = new ListViewItem();
lvi.Text = orole.Member.LoginName;
lvsi = new ListViewItem.ListViewSubItem();
lvsi.Text = orole.Member.PrincipalType.ToString();
lvi.SubItems.Add(lvsi);
//get the type group or user
// MessageBox.Show(orole.Member.PrincipalType.ToString());
if (orole.Member.PrincipalType.ToString() == "SharePointGroup")
lvigroup = new ListViewItem();
lvigroup.Text = orole.Member.LoginName;
// args.GroupsList.Items.Add(lvigroup);
DoUpdate1(lvigroup);
Group group = clientContext.Web.SiteGroups.GetById(orole.Member.Id);
UserCollection collUser = group.Users;
clientContext.Load(collUser);
clientContext.ExecuteQuery();
foreach (User oUser in collUser)
lvigroup = new ListViewItem();
lvigroup.Text = "";
lvsigroup = new ListViewItem.ListViewSubItem();
lvsigroup.Text = oUser.LoginName;
lvigroup.SubItems.Add(lvsigroup);
//args.GroupsList.Items.Add(lvigroup);
DoUpdate1(lvigroup);
// MessageBox.Show(oUser.LoginName);
RoleDefinitionBindingCollection roleDefsbindings = null;
roleDefsbindings = orole.RoleDefinitionBindings;
clientContext.Load(roleDefsbindings);
clientContext.ExecuteQuery();
//permission level
lvsi = new ListViewItem.ListViewSubItem();
string permissionsstr = string.Empty;
for (int i = 0; i < roleDefsbindings.Count; i++)
if (i == roleDefsbindings.Count - 1)
permissionsstr = permissionsstr += roleDefsbindings[i].Name;
else
permissionsstr = permissionsstr += roleDefsbindings[i].Name + ", ";
lvsi.Text = permissionsstr;
lvi.SubItems.Add(lvsi);
// args.PermissionsList.Items.Add(lvi);
DoUpdate2(lvi);
catch (Exception ex)
MessageBox.Show(ex.Message);
finally
DoUpdate3();
Kind Regards, John Naguib Technical Consultant/Architect MCITP, MCPD, MCTS, MCT, TOGAF 9 Foundation

Issue in adding new items to a O365 SharePoint Online List having lookup columns (Client Object Model)

I have two Lists i.e. Publisher and Products in my SharePoint Online site. They are having the following structures:
1. Publisher:
Publisher (Single line of txt)
     A1
     A2
     A3
     A4
     A5
     A6
2. Products:
Publisher (lookup to the above column)
ProductName (Single line of txt)
     A1                                                                   Apple
     A2                                                                   Samsung
     A3                                                                   Nokia
And I have an excel file named Products.xlsx in my local machine which has the following data:
Publisher        ProductName
     A1                   Apple
     A2                   Samsung
     A3                   Nokia
     A4                   Motorola
     A5                   LG
     A6                   HTC
Now I have written the below client-side (CSOM) code to fetch the data from the Excel and update the corresponding fields in the Products table:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Web;
using System.IO;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Client;
using File =
Microsoft.SharePoint.Client.File;
using System.Security;
namespace ExcelToSP
    public class
ExcelToSP
        //Main function to get the command line values and invoke the getSPList function to pull SP List data
        public
static void Main(string[] args)
            //Instantiate Class object
            ExcelToSP p
= new ExcelToSP();
            try
                p.LoadExcelData();
//Exit with Sucess code
Environment.Exit(0);
            catch
(Exception ex)
//Invoke writeErrorLog function to log the exception details
//p.WriteErrorLog(ex);
        public
void LoadExcelData()
            try
            string fileName
= @"E:\Products.xlsx";
            string fileExtension
= Path.GetExtension(fileName).ToUpper();
            string connectionString
= "";
             if
(fileExtension == ".XLS")
                connectionString
= "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='"
+ fileName + "'; Extended Properties='Excel 8.0;HDR=YES;'";
            else
if (fileExtension ==
".XLSX")
                connectionString
= "Provider=Microsoft.ACE.OLEDB.12.0;Data Source='"
+ fileName + "';Extended Properties='Excel 12.0 Xml;HDR=YES;'";
            if
(!(string.IsNullOrEmpty(connectionString)))
string[] sheetNames =
GetExcelSheetNames(connectionString);
if ((sheetNames !=
null) &&
(sheetNames.Length
> 0))
DataTable dt = null;
OleDbConnection con =
new OleDbConnection(connectionString);
OleDbDataAdapter da =
new OleDbDataAdapter("SELECT * FROM ["
+ sheetNames[0]
+ "]", con);
                    dt
= new DataTable();
                    da.Fill(dt);
InsertIntoList(dt,"Products");
            catch
(Exception ex)
throw ex;
        private
string[] GetExcelSheetNames(string strConnection)
            var connectionString
= strConnection;
            String[] excelSheets;
            using
(var connection =
new OleDbConnection(connectionString))
                connection.Open();
var dt = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,
null);
if (dt ==
null)
return null;
                excelSheets
= new String[dt.Rows.Count];
int i = 0;
// Add the sheet name to the string array.
foreach (DataRow row
in dt.Rows)
                    excelSheets[i]
= row["TABLE_NAME"].ToString();
                    i++;
            return excelSheets;
        private
void InsertIntoList(DataTable listTable,
string ListName)
            try
string username = "[email protected]";
string pwd = "contoso@1234";//this.Dts.Variables["password"].Value.ToString();
ClientContext clientContext =
new ClientContext("https://contoso.sharepoint.com/teams/myPOC/");
SecureString password =
new SecureString();
char[] decryptpwd = pwd.ToCharArray();
foreach (char c
in decryptpwd)
                    password.AppendChar(c);
                clientContext.Credentials
= new SharePointOnlineCredentials(username, password);
                clientContext.ExecuteQuery();
//Setting SiteURL Client context
Web web = clientContext.Web;//
                clientContext.Load(web);
                clientContext.ExecuteQuery();
List lstProductFamily = web.Lists.GetByTitle("Products");
for (int iRow
= 0; iRow < listTable.Rows.Count; iRow++)
ListItemCreationInformation itemCreateInfo =
new ListItemCreationInformation();
ListItem newItem = lstProductFamily.AddItem(itemCreateInfo);
//FieldLookupValue flv = newItem["Publisher"] as FieldLookupValue ;
//string lkup = flv.LookupValue;
//int valueid = 0;
//valueid = flv.LookupId;
                    newItem["Publisher"]
= Convert.ToString(listTable.Rows[iRow][0]);
                    newItem["ProductName"]
= Convert.ToString(listTable.Rows[iRow][1]);
                    newItem.Update();
                    clientContext.ExecuteQuery();
            catch
(Exception ex)
throw ex;
But I'm getting the following error on running the above code "Invalid data has been used to update the list item. The field you are trying to update may be read only."
Can anybody please help me out?

Hi,
According to your description, my understanding is that you want to update data to look up field.
I have a test about updating look up field using Client Object Model in my environment. lookup field will accept an array to set the field value.
Here is the code snippet:
Microsoft.SharePoint.Client.ClientContext ctx = new ClientContext("http://sp2013sps/sites/test/");
if (ctx != null)
List list = ctx.Web.Lists.GetByTitle("List3");
ListItem itemToUpdate = list.GetItemById(1);
ctx.Load(itemToUpdate);
ctx.ExecuteQuery();
FieldLookupValue newLookUpField = new FieldLookupValue();
newLookUpField.LookupId = 3;
FieldLookupValue newLookUpField1 = new FieldLookupValue();
newLookUpField1.LookupId = 4;
FieldLookupValue[] newarr = { newLookUpField, newLookUpField1 };
itemToUpdate["lookup"] = newarr;
itemToUpdate.Update();
ctx.Load(itemToUpdate);
ctx.ExecuteQuery();
Best regards
Patrick Liang
TechNet Community Support

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