SharePoint 2010 - errore nella lettura delle voci dell'elenco "Impossibile completare questa azione. Riprova".

Question

Ho una soluzione Farm SharePoint 2010 che distribuisce un elenco e una web part che legge da tale elenco. In realtà fa più di questo, ma non riesco a superare la parte "leggi l'elenco".

Sono in grado di eseguire query sull'elenco e recuperare SPListItemCollection, ma quando tento di eseguire il ciclo degli elementi ottengo questo errore totalmente ambiguo "Impossibile completare questa azione. Riprova." analisi dello stack completa qui sotto:

[COMException (0x80004005): Cannot complete this action. 

Please try again.<nativehr>0x80004005</nativehr><nativestack></nativestack>] 
    Microsoft.SharePoint.Library.SPRequestInternalClass.GetListItemDataWithCallback2(IListItemSqlClient pSqlClient, String bstrUrl, String bstrListName, String bstrViewName, String bstrViewXml, SAFEARRAYFLAGS fSafeArrayFlags, ISP2DSafeArrayWriter pSACallback, ISPDataCallback pPagingCallback, ISPDataCallback pPagingPrevCallback, ISPDataCallback pFilterLinkCallback, ISPDataCallback pSchemaCallback, ISPDataCallback pRowCountCallback, Boolean& pbMaximalView) +0 
    Microsoft.SharePoint.Library.SPRequest.GetListItemDataWithCallback2(IListItemSqlClient pSqlClient, String bstrUrl, String bstrListName, String bstrViewName, String bstrViewXml, SAFEARRAYFLAGS fSafeArrayFlags, ISP2DSafeArrayWriter pSACallback, ISPDataCallback pPagingCallback, ISPDataCallback pPagingPrevCallback, ISPDataCallback pFilterLinkCallback, ISPDataCallback pSchemaCallback, ISPDataCallback pRowCountCallback, Boolean& pbMaximalView) +256 

[SPException: Cannot complete this action. 

Please try again.] 
    Microsoft.SharePoint.SPGlobal.HandleComException(COMException comEx) +27257906 
    Microsoft.SharePoint.Library.SPRequest.GetListItemDataWithCallback2(IListItemSqlClient pSqlClient, String bstrUrl, String bstrListName, String bstrViewName, String bstrViewXml, SAFEARRAYFLAGS fSafeArrayFlags, ISP2DSafeArrayWriter pSACallback, ISPDataCallback pPagingCallback, ISPDataCallback pPagingPrevCallback, ISPDataCallback pFilterLinkCallback, ISPDataCallback pSchemaCallback, ISPDataCallback pRowCountCallback, Boolean& pbMaximalView) +27639062 
    Microsoft.SharePoint.SPListItemCollection.EnsureListItemsData() +4145 
    Microsoft.SharePoint.SPListItemCollection.GetEnumerator() +146 
    X.CBAS.TargetedNav.TargetedNav.TargetedNav.getUrlsForUser() +433 
    X.CBAS.TargetedNav.TargetedNav.TargetedNav.CreateChildControls() +437 
    System.Web.UI.Control.EnsureChildControls() +146 
    X.CBAS.TargetedNav.TargetedNav.TargetedNav.OnLoad(EventArgs e) +140 
    System.Web.UI.Control.LoadRecursive() +66 
    System.Web.UI.Control.LoadRecursive() +191 
    System.Web.UI.Control.LoadRecursive() +191 
    System.Web.UI.Control.LoadRecursive() +191 
    System.Web.UI.Control.LoadRecursive() +191 
    System.Web.UI.Control.LoadRecursive() +191 
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428 

Ho guardato la definizione elenco diverse volte e sembra suono, come è il codice parte web da quello che posso vedere.

La definizione lista:

<ContentTypes> 
    <ContentTypeRef ID="0x0105"> 
    <Folder TargetName="Link" /> 
    </ContentTypeRef> 
    <ContentTypeRef ID="0x0120" /> 
</ContentTypes> 
<Fields> 
    <Field ID="{fa564e0f-0c70-4ab9-b863-0177e6ddd247}" Name="Title" ReadOnly="TRUE" Required="FALSE" Hidden="TRUE" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="Title"></Field> 
    <Field ID="{82642ec8-ef9b-478f-acf9-31f7d45fbc31}" Name="LinkTitle" Hidden="TRUE" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="LinkTitle"></Field> 
    <Field ID="{bc91a437-52e7-49e1-8c4e-4698904b2b6d}" Name="LinkTitleNoMenu" Hidden="TRUE" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="LinkTitleNoMenu"></Field> 
    <Field ID="{081c6e4c-5c14-4f20-b23e-1a71ceb6a67c}" Name="DocIcon" DisplaceOnUpgrade="TRUE" DisplayName="$Resources:core,Type;" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="DocIcon"></Field> 
    <Field ID="{503f1caa-358e-4918-9094-4a2cdc4bc034}" Name="Edit" DisplayName="$Resources:core,Edit;" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="Edit"></Field> 
    <Field ID="{c29e077d-f466-4d8e-8bbe-72b66c5f205c}" Type="URL" Name="URL" DisplayName="$Resources:core,URL;" Required="TRUE" FromBaseType="TRUE" ShowInViewForms="FALSE" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="URL"></Field> 
    <Field ID="{9da97a8a-1da5-4a77-98d3-4bc10456e700}" Type="Note" Name="Comments" DisplayName="$Resources:core,Notes;" Sortable="FALSE" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="Comments"></Field> 
    <Field ID="{DEDA572B-9D15-4FCE-81DA-D12EE9C29D61}" Type="Text" Name="Source" DisplayName="$Resources:X.CBAS.TargetedNav,FieldSource;" StaticName="Source" /> 
    <Field ID="{D68FEB34-BC7B-450D-8422-AA4CBA74D517}" Type="Text" Name="EpiwManagerYN" DisplayName="$Resources:X.CBAS.TargetedNav,FieldEpiwManagerYN;" StaticName="EpiwManagerYN" /> 
    <Field ID="{2a9ab6d3-268a-4c1c-9897-e5f018f87e64}" ReadOnly="TRUE" Filterable="FALSE" Type="Computed" Name="URLwMenu" DisplayName="$Resources:core,URL;" DisplayNameSrcField="URL" ClassInfo="Menu" AuthoringInfo="$Resources:core,URLwEditMenu;" ListItemMenuAllowed="Required" LinkToItemAllowed="Prohibited" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="URLwMenu"> 
    <FieldRefs> 
     <FieldRef Name="URL" /> 
     <FieldRef Name="FileLeafRef" /> 
     <FieldRef Name="FileRef" /> 
     <FieldRef Name="FSObjType" /> 
     <FieldRef Name="_EditMenuTableStart2" /> 
     <FieldRef Name="_EditMenuTableEnd" /> 
    </FieldRefs> 
    </Field> 
    <Field ID="{7A7F3660-D408-4734-9AA0-2D86E33D79AB}" ReadOnly="TRUE" Filterable="FALSE" Type="Computed" Name="URLwMenu2" DisplayName="$Resources:core,URL;" DisplayNameSrcField="URL" ClassInfo="Menu" AuthoringInfo="$Resources:core,URLwEditMenu; (old)" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="URLwMenu2"> 
    <FieldRefs> 
     <FieldRef Name="URL" /> 
     <FieldRef Name="FileLeafRef" /> 
     <FieldRef Name="FileRef" /> 
     <FieldRef Name="FSObjType" /> 
     <FieldRef Name="_EditMenuTableStart" /> 
     <FieldRef Name="_EditMenuTableEnd" /> 
    </FieldRefs> 
    </Field> 
    <Field ID="{aeaf07ee-d2fb-448b-a7a3-cf7e062d6c2a}" DisplaceOnUpgrade="TRUE" ReadOnly="TRUE" Filterable="FALSE" Type="Computed" Name="URLNoMenu" DisplayName="$Resources:core,URL;" DisplayNameSrcField="URL" SourceID="http://schemas.microsoft.com/sharepoint/v3" StaticName="URLNoMenu"> 
    <FieldRefs> 
     <FieldRef Name="URL" /> 
     <FieldRef Name="FileLeafRef" /> 
     <FieldRef Name="FileRef" /> 
     <FieldRef Name="FSObjType" /> 
    </FieldRefs> 
    </Field> 
</Fields> 

Il codice qui sotto mostra dove sto correndo nell'errore - ancora una volta, niente di speciale:

SPQuery query = new SPQuery() { Query = this.filterQuery }; 

//Loop through the returned URL(s) and add them to the list 
foreach (SPItem item in list.getItems(query)) { //<-- Error happens here, when getting the enumerator for the SPListItemsCollection 
     returnValue.Add(this.getUrlFromItem(item)); 
} 

E, infine, il CAML:

<Where> 
    <FieldRef Name="Source" /> 
    <Value Type="Text">http://dev01:80/Pages/default.aspx</Value> 
</Where> 

Tutte le idee su quello che potrebbe accadere qui sarebbero ACCETTATE ENORME!

Answer 1

Ho scoperto il problema: scarsa sintassi CAML.

La cattiva CAML:

<Where> 
    <FieldRef Name="Source" /> 
    <Value Type="Text">http://dev01:80/Pages/default.aspx</Value> 
</Where> 

La corretta caml:

<Where> 
    <Eq> 
    <FieldRef Name="Source" /> 
    <Value Type="Text">http://dev01:80/Pages/default.aspx</Value> 
    </Eq> 
</Where> 

Stranamente, non ho mai visto male CAML risultato di sintassi in un errore come questo.