The argument 'sql' cannot be null, empty or contain only white space. When first create the database

code first entity framework 4.1 The permission to CREATE DATABASE was refused in the database'master.'

I just ran into this myself. The connection string name must match the class name of your DbContext subclass exactly. If it doesn't EF will not find the connection string and will try and fall back to doing something else (SQL embedded?) which doesn't work on my machine (I have full SQL Server installed).

"CREATE DATABASE permission refused in database'master'," says EF Code First.

I once faced this problem and resolved it. The key is using SQL authentication instead of Windows'. This is the clearest way to specify the default db....Try connection string in this way:...<add name="MFCConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MFC.mdf;Initial Catalog=MFC;Integrated Security=fal...

EF code first - Model compatibility cannot be checked because the database does not contain model metadata

Here is a detailed description of the possible ways to resolve this which I wrote a while ago...... (not exactly what you're experiencing, hence not a duplicate per se, but with different scenarios in mind) ...https://stackoverflow.com/a/10255051/417747...To summarize... ...What works for me is to use Update-Database -Script...That creates a scri...

Create one to one relationship by using entity framework database first

Creating a 1:1 relationship is not that tricky and certainly not impossible, although it is not a particularly common requirement and in this case I can't see why you would want it? If people are saying this then you are talking to the wrong people. ...Anyhow using SQL queries as you seem to be is not to do with EF, you are just working directly wi...

How can I create a database in SQL Server by code first entity framework 6?

You need to tell your ...DbContext... to use the intended connection string. It will default to one named the same as your application (i.e. "Raja1"), whereas your connection string is named "dbRaja"....public class MyContext : DbContext { public MyContext : base("name=dbRaja") { } }

Getting Error The argument 'nameOrConnectionString' cannot be null, empty or contain only white space with Azure Database

If you have multiple projects under solution, try setting up the startup project will resolve this issue.(sry for the delay)

Entity Framework 6 Database First Approach Not Creating All Tables From SQL Server

EF by convention avoid to map ...junction tables... that only have PK/FKs columns.It will take care to handle (populate/consult/etc) those tables for you. If you check, for example,your ...Issue... entity, you will see a collection property of type ...Item.... ...public virtual ICollection<Item> Items{get;set;} ...The same happens to the ...Item...

EF Code First CREATE DATABASE permission denied in database 'master'

To create the database:...Open the Security folder, then open the Logins folder and select the user account under which you want to create the database. Open the account's Properties, select the Server Roles tab and then select the dbcreator checkbox (sysadmin works even better). You can also try to create the database while logged in under the sta...

How to avoid connections against empty/null database by Entity Framework

I didn't personally see the error before, but researched for you and seen that many people suffered from the same problem discussed here: ...https://blogs.msdn.microsoft.com/sql_protocols/2006/02/21/understanding-login-failed-error-18456-error-messages-in-sql-server-2005/...I read all the messages in the website specified, and here are the solution...

The argument 'nameOrConnectionString' cannot be null, empty or contain only white space in Entity Framework project

Ok, so after a long trial and error period, the solution (that was obviously not known to me as a newbie to entity framework and migration dll's) was that even though the separate dll which holds the entity models has already got the context and definitions, you also need to have your own dbcontext class in your project with all the tables ... pub...