entity-data-model

问题 This is confusing me a bit... When people talk about ADO.NET Entity Framework are they actually talking about ADO.NET Entity Data Model? 回答1: No, the Entity Framework includes several components such as the Entity Data Model Wizard, which allows you to create an ADO.NET Entity Data Model (via Database First or Design First workflow, or Code First). The data model is stored in an EDMX file (for Database First or Design First) and can be viewed and edited in the Entity Framework Designer. For

问题 I'm trying to generate/update an edmx model from an oracle database and I need to create a new connection to that oracle database. When I click "Test Connection" it succeeds but when I click "OK" it gives the following error: Operation is not valid due to the current state of the object VS 2017 error when adding new connection to update edmx model 回答1: I had the exact same issue after a brand new installation of VS2017. Installed VS2017 (enterprise edition, in my case). Previously ODT didn't