ado.net-entity-data-model

I need to use tables from a DB which I cannot alter (using linked server). So part of my schema is a view on these table and I cannot create an FK in my DB. When I come to creating the association in ADO.NET Entity Framework I am getting problems because a second column on the table from the external DB has an index on it and the EF is creating an Entity Key for it (it's the name descr of the record - I think they just wanted to speed the ordering on it). When I take the Entity Key off this column in the EF entity it complains that I need it because the underlying table has a key on it. If I

How do you change the name of the connection string that Entity Framework models are bound to by default? Let's say I create an Entity Framework data model named "Model1.edmx" by pointing it to a databased named "MyDb" and picking some objects to map using the Visual Studio add new item wizard. The EF model is in a class library project, so when the wizard completed, it automatically added a connection string named "MyDbEntities" to the App.Config file for the project. My model references this connection string by default. I know I can pass in a connection string to a constructor for my model

When setting up a new Entity data Model, there is an option to [x] Pluralize or singularize generated object names I have noticed this is an option in LINQ as well. Also, now that I am studying the ADO.NET entity framework, I noticed it also has 'DEFAULT' to 'pluralize or singularize generated object names' What is the result of not checking/allowing this option when setting up the 'Entity Data Model'. What Advantages/Disadvantages/issues will I face by making a selection one way or the other? No problem at all, except that you'll probably want to do it manually. Usually, you want entity names

I trying to create an entity data model with Oracle. I am getting this error. I have these installed for my solution. I have also installed ODT for VS 2015. These are my references showing. Web.config <configSections> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> <section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral,

I read somewhere in stackoverflow itself that when we use POCO classes for WCF contracts using Poco generator , we need not use DataContract and DataMember attributes.WCF do it auto for you? . I don't know how it manages this. I created a sample application without using these attributes and I was able to generate those entities on client side and use them. I disabled proxy generation and Lazy loading. Am i missing anything here.? Is there really no need of putting these attributes. You did it right way. Since WCF 3.5 SP1 it is not needed to add DataContract and DataMember attributes. If

I am trying to use ADO.Net Codefirst feature of latest Entity Framework 4.0. As part of that I have installed Entity Framework CTP 4 from Microsft and using Scott's tutorial to create the model first. Inside the tutorial DBContext and DBSet<> is specified. Could some tell what is the reference to be used in order to access this class. I have used the following references however nothing happens for DBContext and DBSet<> System.Data.Entity System.Data.Entity.Design Use CTP5 instead it is newer version with some changes in API. You have to add reference to EntityFramework.dll which is installed

command: add-migration blahblah -verbose error: Sequence contains no elements I did a few things before getting this error. I made a change to my code-first model but did not run add-migration yet. Then I added an EDMX model to play around with an idea visually. I realized the EDMX model was messing with my code so I removed it. I tried to run add-migration and got "Sequence contains no elements". I upgraded to EF 5 and uninstalled the old Migrations package except for my configurations. Then I tried add-migration again and I am still getting "Sequence contains no elements". Below is the rest