System data updateexception an error occurred while updating the entries
This is the second article in a series about using Microsoft’s data access technology, Entity Framework (EF) in an application that to be ‘always on’, in my case an ASP. In this article I look at the problem of keeping EF’s view of the database schema, known as the EF database model, in step with the actual SQL database schema.
NET MVC e-commerce web site, yet is still being developed so there is a need to update the database schema, i.e. The list of articles will be: EF is great to develop with as it does a number of clever things in the backgrounds to help developers.
This is very clever, but to do this EF’s view of the database relationships must match the reality of what is in the d.
So instead of letting Code First create our database, we will need to manually add a database to our project.
Issue: I was calling my WCF Data Service today and was getting a Not Supported Exception with an Inner Exception of “An error occured while processing this request” and no further detail which is not very helpful for debugging.
As Brice noted in his post, Npgsql currently doesn't support database creation.
( I'm working on that and hope to get news about it soon.) So, for while, you have to create the database manually.
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Create Command(Db Modification Command Tree command Tree) D; at System.