Learn EF a little summary the first day, learn EF summary the first day

Learn EF a little summary the first day, learn EF summary the first day

Environment: win7, vs2013, SQL server 2008

The following problems are encountered in the progressive model frist instance today:

Solution: Create an environment variable, as shown in

I will install vs2013 on the E drive, OK, restart vs2013 to solve the problem

Note: 1. if the fields in the table need to be changed, do not execute the second generation step; otherwise, all the values of the fields in the database will be deleted (For details, refer to the generated script language ).

It can be modified in the object and then in the database. In short, do not execute the script (the second time ).

2. Specify the project security package code

PM> Install-Package EntityFramework-ProjectName DataModelDemo-Version 5.0