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POGetting ID of item after posting to a document library
 

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  1. POGetting ID of item after posting to a document library
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    <p>I'm currently consuming information from Sharepoint 2010 using WCF Data Services from C# (an asp.net mvc4 application).</p> <p>With regular Sharepoint lists items, when saving the changes to the context, the id of the new item is automatically populated on the original object. Meaning:</p> <pre><code>SomeContext context = /* creation of the context*/; var someEntity = new SomeEntity {...}; context.AddToSomeEntityItems(someEntity); context.SaveChanges(); var newId = someEntity.Id; //this will have the new id </code></pre> <p>However, if what you are creating is an item for a document library, the id doesn't seem to be updated on the saved entity. For example:</p> <pre><code>SomeContext context = /* creation of the context*/; var someOtherEntity = new SomeOtherEntity {...}; Stream data = /* some stream*/; context.AddToSomeOtherEntityItems(someOtherEntity); context.SetSaveStream(someOtherEntity, data, true, "SomeMIMEType", "SomeSlugPath"); context.SaveChanges(); var newId = someOtherEntity.Id; //this will instead always have 0 </code></pre> <p>I initially thought this was a bug in the first version of WCF Data Services so I updated to the latest, <a href="http://nuget.org/packages/Microsoft.Data.Services.Client/5.4.0" rel="nofollow">5.4.0</a>. But the behavior seems to be the same.</p> <p>I would prefer to have to avoid strange lookups that ultimately could fail during heavy load, such as using <code>.OrderByDescending(x =&gt; x.Id).First()</code> to get the recently created item.</p> <p>When looking at the actual network traffic using Fiddler, I can see that the initial upload of the binary data actually does return the information for the item along with its ID. And if I configure other relationships to that item using <a href="http://msdn.microsoft.com/en-us/library/system.data.services.client.dataservicecontext.setlink%28v=vs.95%29.aspx" rel="nofollow">SetLink</a> prior to saving changes they are linked correctly, so the context does handle the value accordingly.</p> <p>Is there any way to get WCF Data Services to update the ID on the entity when the item is for a document library?</p>
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    1. COWow, am I really the only one using WCF Data Services for a scenario with data streams?
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