Fixed – ‘Invalid ‘where’ condition. An entity member is invoking an invalid property or method’ while using LINQ query (Dataverse / Dynamics 365)

When using LINQ to query Dataverse, you may encounter the error "System.NotSupportedException: 'Invalid 'where' condition. An entity member is invoking an invalid property or method.'" This error occurs when using the HasValue property, which is not supported in FetchXML. To fix this, manually check for null using != null or GetValueOrDefault(). Additionally, if you encounter the same error when accessing a property of a LookUp field in the where clause, you can fix it by performing a join between the tables. Lastly, when accessing attributes in LINQ, use the GetAttributeValue method or casting instead of ToString().

Article 4m Nishant Rana's Weblog

---

Login now to access my digest by 365.Training

Login