Fehler bei CAML-Query

Andreas St. erstellt 28 Okt. 2013 09:06

Hallo,

ich versuche gerade folgendes:

camlQuery2.Query = "<Where>" +
                        "<Or>" +
                            "<And>" +
                                "<Leq>" +
                                    "<FieldRef Name=\"von\" /><Value Type=\"DateTime\">" + strStartDate + "</Value>" +
                                "</Leq>" +
                                "<Leq>" +
                                    "<FieldRef Name=\"bis\" /><Value Type=\"DateTime\">" + strEndDate + "</Value>" +
                                "</Leq>" +
                                "<Geq>" +
                                    "<FieldRef Name=\"bis\" /><Value Type=\"DateTime\">" + strStartDate + "</Value>" +
                                "</Geq>" +
                            "</And>" +
                            "<And>" +
                                "<Geq>" +
                                    "<FieldRef Name=\"von\" /><Value Type=\"DateTime\">" + strStartDate + "</Value>" +
                                "</Geq>" +
                                "<Geq>" +
                                    "<FieldRef Name=\"bis\" /><Value Type=\"DateTime\">" + strEndDate + "</Value>" +
                                "</Geq>" +
                            "</And>" +
                        "</Or>" +
                  
                     "</Where>";

Dabei kommt aber leider die Meldung:
"Der Vorgang kann nicht erfolgreich beendet werden."

Hat jemand eine Idee, was ich da falsch mache? Finde den Fehler einfach nicht......

Danke schon mal!!!