SharePoint 2010 ClientObjectModel : Find Item by GUID

Question

I have a list of 6000 listitem GUIDs. I need to check if each item still exist on the Web.

Previously, I was using the SPWeb.GetFile(GUID) method to check the item.

But now I need to convert that process usinig the ClientObjectModel. I cannot find a way to retrieve the item using the GUID.

I even tried from the "List" object. And can't find a way to retrieve the item from its GUID neither.

Please help! :(

Answer 1

I'm afraid the only way is to use CAML query. Even worse, since you don't have a SPSiteDataQuery alternative in Client Object Model, you can't perform cross-site queries, so you have to query each list separately.

Example code for quering a list with SharePoint 2010 Client Object Model:

string siteUrl = "http://MyServer/sites/MySiteCollection";
string listTitle = "your list title here";
string guid = "put-your-guid-here";

ClientContext clientContext = new ClientContext(siteUrl);
Web site = clientContext.Web;
List targetList = site.Lists.GetByTitle(listTitle);

CamlQuery query = new CamlQuery();
query.ViewXml = String.Format("<View><Query><Where><Eq><FieldRef Name='UniqueId'/><Value Type='Guid'>{0}</Value></Contains></Where></Query></View>", guid);
ListItemCollection collListItem = targetList.GetItems(query);

clientContext.Load(collListItem);
clientContext.ExecuteQuery();

bool itemIsFound = (collListItem.Count == 1);

(the code has been tested and works)