Tutorial on how to update list items using ListData.svc

Can you please point me to a tutorial which shows how to update a list item using listdata.svc and C#?
Sorry if this is FAQ.
I have found articles on read list... but I haven't found anything on update a list item.
val it: unit=()

when i try this I get an error 500
I created an ASP.NET web application that allows the user to modify data that is stored in SharePoint I rather not go into the reasons why this application was created but focus more on why doesn't the listdata.svc allow me to update a task item that was
created by a workflow collect data from user action.
1. The workflow creates the item.
I collect the item and update the item using the below code. This is not an OOTB approval workflow that is just the name I used. When I get to save changes I received the following error code.
Dim getApprovalItem As ExpenseApprovalRuleBasedTasksItem = spContext.ExpenseApprovalRuleBasedTasks.Where(Function(i) i.Id = Pam.ApprovalItemID).FirstOrDefault
If String.IsNullOrEmpty(getApprovalItem.AuditorApprovalValue) Then
getApprovalItem.AuditingComments = approvalComments
Select Case approvalDecision
Case "Approved"
getApprovalItem.AuditorApproval = ExpenseApprovalRuleBasedTasksAuditorApprovalValue.CreateExpenseApprovalRuleBasedTasksAuditorApprovalValue("Approved")
getApprovalItem.AuditorApprovalValue = "Approved"
Case "Rejected"
getApprovalItem.AuditorApproval = ExpenseApprovalRuleBasedTasksAuditorApprovalValue.CreateExpenseApprovalRuleBasedTasksAuditorApprovalValue("Rejected")
getApprovalItem.AuditorApprovalValue = "Rejected"
End Select
getApprovalItem.Outcome = "Completed"
getApprovalItem.Status = ExpenseApprovalRuleBasedTasksStatusValue.CreateExpenseApprovalRuleBasedTasksStatusValue("Completed")
getApprovalItem.StatusValue = "Completed"
getApprovalItem.Complete = True
spContext.UpdateObject(getApprovalItem)
spContext.SaveChanges()
End If

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How to update list item using client object model without changing created/modified dates?

Hello All,
I want to update list item using the SharePoint Client Object
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Thanks.

Using the SystemUpdate method should do the trick, according
to its literature.
Additionally, would something like this be of any use for you? Taken from this
Stack Exchange thread: -
public static class SPListItemExtensions
/// <summary>
/// Provides ability to update list item without firing event receiver.
/// </summary>
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/// <summary>
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/// </summary>
/// <param name="item"></param>
/// <param name="incrementListItemVersion"></param>
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public static void SystemUpdate(this SPListItem item, bool incrementListItemVersion, bool doNotFireEvents)
SPItemEventReceiverHandling rh = new SPItemEventReceiverHandling();
if (doNotFireEvents)
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/// <summary>
/// Provides ability to update list item without firing event receiver.
/// </summary>
/// <param name="item"></param>
/// <param name="doNotFireEvents">Disables firing event receiver while updating item.</param>
public static void SystemUpdate(this SPListItem item, bool doNotFireEvents)
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if (doNotFireEvents)
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private class SPItemEventReceiverHandling : SPItemEventReceiver
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Steven Andrews
SharePoint Business Analyst: LiveNation Entertainment
Blog: baron72.wordpress.com
Twitter: Follow @backpackerd00d
My Wiki Articles:
CodePlex Corner Series
Please remember to mark your question as "answered" if this solves (or helps) your problem.

How to update list item metadata?

I want to implement lists.asmx > UpdateListItems method. In the update method (the caml) i would like to use barcode as a filter instead of item ID. http://msdn.microsoft.com/en-us/library/office/ms440289(v=office.14).aspx
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Hi ,
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For more information, please take a look at the thread:
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/af23f9f0-2640-474c-9616-522fcb639029/listserviceupdatelistitems-update-reference-field?forum=sharepointdevelopmentlegacy
I recommend that you update list items with listdata.svc.
Reference:
http://chuvash.eu/2011/12/15/update-list-items-with-listdata-svc/
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Eric Tao
TechNet Community Support

Update List Items using REST API - Keep Getting 400 Bad Request

I am using code from the following answer:
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/40833576-5853-4ca4-95cf-b5b1d69f465f/sharepoint-rest-and-c-sample-to-update-list-item?forum=sharepointdevelopment
I am having a tough time figuring out the issue though. I have been able to retrieve list items, but now I want to update those items. This is the following code just to get the digest information with passing in credentials:
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wreq.ContentType = "application/json";
string result;
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using (StreamReader sr = new StreamReader(wresp.GetResponseStream()))
result = sr.ReadToEnd();
var jss = new JavaScriptSerializer();
var val = jss.Deserialize<Dictionary<string, object>>(result);
var d = val["d"] as Dictionary<string, object>;
var wi = d["GetContextWebInformation"] as Dictionary<string, object>;
formDigest = wi["FormDigestValue"].ToString();
Console.WriteLine(formDigest);
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Then the following code is used:
string result = string.Empty;
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HttpWebRequest wreq = (HttpWebRequest)WebRequest.Create(uri);
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wreq.Accept = "application/json; odata=verbose";
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wreq.Headers.Add( "X-HTTP-Method","MERGE");
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writer.Write(stringData);
writer.Flush();
try {
WebResponse wresp2 = wreq.GetResponse();
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Thanks,
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I just found some other code that seemed to work on editing a title and edited it kind of guessing it would work and it did!
This is the code that ended working using the same digest code from above:
Console.WriteLine("\n Newer Fancier Code \n");
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.ContentType = "application/json;odata=verbose";
request.Headers["X-RequestDigest"] = GetFormDigest(cred);
request.Headers["X-HTTP-Method"] = "MERGE";
request.Headers["IF-MATCH"] = "*";
request.Credentials = cred;
request.Accept = "application/json;odata=verbose";
request.Method = "POST";
string stringData = "{ '__metadata': { 'type': 'SP.ListItem' }, 'Location': 'updatedinfo' }";
request.ContentLength = stringData.Length;
StreamWriter writer = new StreamWriter(request.GetRequestStream());
writer.Write(stringData);
writer.Flush();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
Just fyi if anyone was wondering. Next, I'm going to be trying to update multiple fields, possibly multiple items if possible if anyone knows how to do that.

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Hi
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Hi,
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Please remember to click 'Mark as Answer' if the reply answers your query or 'Upvote' if it helps you.

How to update 500 list items using Rest API

Hi All,
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Didn't get you correctly, if you asking reference for REST API to update list items please refer below links
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Destin -MCPD: SharePoint Developer 2010, MCTS:SharePoint 2007 Application Development

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Seidl Michael | http://www.techguy.at |
twitter.com/techguyat | facebook.com/techguyat

Hi
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Seidl Michael | http://www.techguy.at |
twitter.com/techguyat | facebook.com/techguyat

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Hi,
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Hi Shreyas,
From your post, it seems that you are using SharePoint 2013 workflow platform in SPD.
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https://msdn.microsoft.com/en-us/library/office/jj164022.aspx
https://msdn.microsoft.com/en-us/library/office/dn292552.aspx?f=255&MSPPError=-2147217396
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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]

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thank you for the replying. I have just solved this issue. I save the string every time in a column and append the project name in the string column and put the whole string in mutiple lookup column. then the new value will be appended in lookup column. it
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Try below:
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http://blogs.technet.com/b/sharepointdevelopersupport/archive/2013/06/13/how-to-allow-anonymous-users-to-add-items-to-sharepoint-list-using-client-object-model.aspx
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http://www.fiechter.eu/Blog/Post/12/Create-a-survey-for-anonymous-users-on-Office-365
If this helped you resolve your issue, please mark it Answered

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Hi,
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(I initially posted a picture but I cannot, apparently)
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Cheers

Below are steps need to performed to update custom fileds in task form
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Hope this helps.
My Blog- http://www.sharepoint-journey.com|
If a post answers your question, please click Mark As Answer on that post and Vote as Helpful

Filter SharePoint list items using CAML query as same as Like operator in SQL Server.

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--Cheers

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Hi,
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get2pallav
Please click "Propose As Answer" if this post solves your problem or "Vote As Helpful" if this post has been useful to you.

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Hi, can someone please help me with WSS 3 workflows?!
I'll keep it simple - I have a workflow step "Collect data from user" that will fail with Unknown Error when attempting to update list item (this is after the user has clicked Complete Task). The workflow does not continue past this step and I have
to terminate the workflow.
What is odd, is that if I do another Collect data from User in the same step but following the 1st collect, both will work!! How can this be?? This proves the 1st collect is OK so why won't it run without another Collect data after it?! Doesn't make sense to
me.
I was just trying the second Collect to troubleshoot the issue. I've tried other actions there but having another Collect does seem to be the action that kicks things into life. Is there a clue here?
Any clues would be much appreciated as I'm not able to turn much up when I Google.
Thanks

Well, surprise, surprise, this has come back (thought it might!). The trace logs show it's a task locked error but I can't see how. Can anyone please provide me with some clues??
03/14/2014 12:30:25.11    w3wp.exe (0x7698)                          0x5EA4   Windows SharePoint
Services     Web Controls                     88wy   Medium     SPDataSourceView.ExecuteSelect()
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03/14/2014 12:30:28.39    w3wp.exe (0x7698)                          0x6C4C   Windows SharePoint Services
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IsEmpty=True, MaximumRows=0, RetrieveTotalRowCount=False, SortExpression=, StartRowIndex=0, TotalRowCount=-1
03/14/2014 12:30:28.47    w3wp.exe (0x7698)                          0x6C4C   Windows SharePoint Services
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03/14/2014 12:30:29.86    w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
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parentFolderId)     at Microsoft.SharePoint.SPListItem.UpdateInternal(Boolean bSystem, Boolean bPreserveItemVersion, Guid newGuidOnAdd, Boolean bMigration, Boolean bPublish, Boolean bNoVersion, Boolean bCheckOut, Boolean bCheckin, Boolean
suppressAfterEvents)     at Microsoft.SharePoint.SPListItem.Update()     at Microsoft.SharePoint.Workflow.SPWinOEWSSService.CommitUpdateListItem(Transaction txn, Object[] transData)
03/14/2014 12:30:29.86    w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
    Workflow Infrastructure          72fe   High       Error in commiting pending workflow batch items: Microsoft.SharePoint.SPException: This
task is currently locked by a running workflow and cannot be edited.     at Microsoft.SharePoint.SPListItem.PrepareItemForUpdate(Guid newGuidOnAdd, SPWeb web, Boolean bMigration, Boolean& bAdd, Boolean& bPublish, Object& objAttachmentNames,
Object& objAttachmentContents, Int32& parentFolderId)     at Microsoft.SharePoint.SPListItem.UpdateInternal(Boolean bSystem, Boolean bPreserveItemVersion, Guid newGuidOnAdd, Boolean bMigration, Boolean bPublish, Boolean bNoVersion,
Boolean bCheckOut, Boolean bCheckin, Boolean suppressAfterEvents)     at Microsoft.SharePoint.SPListItem.Update()     at Microsoft.SharePoint.Workflow.SPWinOEWSSService.CommitUpdateListItem(Transaction txn, Object[]
transData)     at Micro...
03/14/2014 12:30:29.86*   w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
    Workflow Infrastructure          72fe   High       ...soft.SharePoint.Workflow.SPPendingWork.PerformWorkNow(Transaction txn)
at Microsoft.SharePoint.Workflow.SPPendingWorkBatch.Commit(Transaction transaction, ICollection items)
03/14/2014 12:30:30.05    w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
    Workflow Infrastructure          88xr   Unexpected   WinWF Internal Error, terminating workflow Id# 2dc6002d-9f9d-474f-84cf-329025347ec5
03/14/2014 12:30:30.05    w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
    Workflow Infrastructure          98d4   Unexpected   System.Workflow.Runtime.Hosting.PersistenceException: This task is currently locked by a running workflow
and cannot be edited. ---> Microsoft.SharePoint.SPException: This task is currently locked by a running workflow and cannot be edited.     at Microsoft.SharePoint.SPListItem.PrepareItemForUpdate(Guid newGuidOnAdd, SPWeb web, Boolean
bMigration, Boolean& bAdd, Boolean& bPublish, Object& objAttachmentNames, Object& objAttachmentContents, Int32& parentFolderId)     at Microsoft.SharePoint.SPListItem.UpdateInternal(Boolean bSystem, Boolean bPreserveItemVersion,
Guid newGuidOnAdd, Boolean bMigration, Boolean bPublish, Boolean bNoVersion, Boolean bCheckOut, Boolean bCheckin, Boolean suppressAfterEvents)     at Microsoft.SharePoint.SPListItem.Update()     at Microsoft.SharePoint.Workflow.SPWi...
03/14/2014 12:30:30.05*   w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
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Microsoft.SharePoint.Workflow.SPPendingWork.PerformWorkNow(Transaction txn)     at Microsoft.SharePoint.Workflow.SPPendingWorkBatch.Commit(Transaction transaction, ICollection items)     at System.Workflow.Runtime.WorkBatch.PendingWorkCollection.Commit(Transaction
transaction)     at System.Workflow.Runtime.WorkBatch.Commit(Transaction transaction)     at System.Workflow.Runtime.Hosting.WorkflowCommitWorkBatchService.CommitWorkBatch(CommitWorkBatchCallback commitWorkBatchCallback)
at System.Workflow.Runtime.Hosting.DefaultWorkflowCommitWorkBatchService.CommitWorkBatch(CommitWorkBatchCallback commitWorkBatchCallback)     at System.Workflow.Runtime.WorkflowExecutor.CommitTransaction(Activity activityContext)
03/14/2014 12:30:30.05*   w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
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unlock, Boolean needsCompensation)     --- End of inner exception stack trace ---     at System.Workflow.Runtime.WorkflowExecutor.Persist(Activity dynamicActivity, Boolean unlock, Boolean needsCompensation)
at System.Workflow.Runtime.WorkflowExecutor.System.Workflow.ComponentModel.IWorkflowCoreRuntime.PersistInstanceState(Activity activity)     at System.Workflow.ComponentModel.Activity.MarkClosed()     at System.Workflow.ComponentModel.Activity.ReleaseLockOnStatusChange(IActivityEventListener`1
eventListener)     at System.Workflow.ComponentModel.FaultAndCancellationHandlingFilter.SafeReleaseLockOnStatusChange(ActivityExecutionContext context)     at System.Workflow.ComponentModel.FaultAndCancella...
03/14/2014 12:30:30.05*   w3wp.exe (0x7698)                          0x7A94   Windows SharePoint Services
    Workflow Infrastructure          98d4   Unexpected   ...tionHandlingFilter.OnEvent(Object sender, ActivityExecutionStatusChangedEventArgs e)
at System.Workflow.ComponentModel.ActivityExecutorDelegateInfo`1.ActivityExecutorDelegateOperation.Run(IWorkflowCoreRuntime workflowCoreRuntime)     at System.Workflow.Runtime.Scheduler.Run()
03/14/2014 12:30:30.38    w3wp.exe (0x7698)                          0x6C9C   Windows SharePoint Services
    General                          0   Unexpected   ERROR: request not found
in the TrackedRequests. We might be creating and closing webs on different threads. ThreadId = 59, Free call stack =    at Microsoft.SharePoint.SPRequestManager.Release(SPRequest request)     at Microsoft.SharePoint.SPWeb.Invalidate()
at Microsoft.SharePoint.SPWeb.Close()     at Microsoft.SharePoint.SPSite.Close()     at Microsoft.SharePoint.SPSite.Dispose()     at Microsoft.SharePoint.Workflow.SPWorkflowManager.RunWorkflow(SPWorkflow
workflow, Collection`1 events, SPRunWorkflowOptions runOptions)     at Microsoft.SharePoint.Workflow.SPWorkflowManager.RunWorkflow(SPWorkflow workflow, Collection`1 events)     at Microsoft.SharePoint.Workflow.SPWinOEItemEventReceiver.RouteWorkflowEvent(SPItemEventProperties
properties, SPWeb web, SPListItem item, Boolean fNeedTas...
03/14/2014 12:30:30.38*   w3wp.exe (0x7698)                          0x6C9C   Windows SharePoint Services
    General                          0   Unexpected   ...kReset)
at Microsoft.SharePoint.Workflow.SPWinOEItemEventReceiver.ItemUpdated(SPItemEventProperties properties)     at Microsoft.SharePoint.SPEventManager.RunItemEventReceiver(SPItemEventReceiver receiver, SPItemEventProperties properties, SPEventContext
context, String receiverData)     at Microsoft.SharePoint.SPEventManager.RunItemEventReceiverHelper(Object receiver, Object properties, SPEventContext context, String receiverData)     at Microsoft.SharePoint.SPEventManager.<>c__DisplayClass8`1.<InvokeEventReceivers>b__0()
at Microsoft.SharePoint.SPSecurity.CodeToRunElevatedWrapper(Object state)     at Microsoft.SharePoint.SPSecurity.RunAsUser(SPUserToken userToken, Boolean bResetContext, WaitCallback code, Object param)     at Microsoft.SharePoint.SPSecurity.RunAsUser(SPUserToken
03/14/2014 12:30:30.38*   w3wp.exe (0x7698)                          0x6C9C   Windows SharePoint Services
    General                          0   Unexpected   ...userToken, CodeToRunElevated
code)     at Microsoft.SharePoint.SPEventManager.InvokeEventReceivers[ReceiverType](SPUserToken userToken, RunEventReceiver runEventReceiver, Object receivers, Object properties, Boolean checkCancel)     at Microsoft.SharePoint.SPEventManager.InvokeEventReceivers[ReceiverType](Byte[]
userTokenBytes, RunEventReceiver runEventReceiver, Object receivers, Object properties, Boolean checkCancel)     at Microsoft.SharePoint.SPEventManager.HandleEventCallback[ReceiverType,PropertiesType](Object callbackData)
at Microsoft.SharePoint.Utilities.SPThreadPool.WaitCallbackWrapper(Object state)     at System.Threading.ExecutionContext.runTryCode(Object userData)     at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
code, CleanupCo...
03/14/2014 12:30:30.38*   w3wp.exe (0x7698)                          0x6C9C   Windows SharePoint Services
    General                          0   Unexpected   ...de backoutCode, Object
userData)     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)     at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback
tpWaitCallBack)     at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state) , Allocation call stack (if present) null

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