SharePoint 2010 - errore nella lettura delle voci dell'elenco "Impossibile completare questa azione. Per favore riprova. "- sharepoint-2010, web-parts, caml

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

Sono in grado di interrogare correttamente l'elenco e otteneretorna a SPListItemCollection, ma quando tento di scorrere gli elementi ottengo questo errore del tutto ambiguo "Impossibile completare questa azione. Riprova." Traccia dello stack completo di seguito:

[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 esaminato più volte la definizione dell'elenco e sembra corretto, così come il codice della web part da quello che posso vedere.

La definizione dell'elenco:

<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 seguente mostra dove mi sono imbattuto nell'errore - di nuovo, 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>

Qualsiasi idea su ciò che potrebbe accadere qui sarebbe molto apprezzata!

risposte:

12 per risposta № 1

Ho scoperto il problema: scarsa sintassi CAML.

Il cattivo CAML:

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

Il caml corretto:

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

Stranamente, non ho mai visto un errore di sintassi CAML errato come questo.

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