使用Entity Framework进行原始查询以添加/更改表的列而不进行迁移

Question

I have restricted access to SQL server database & I have to alter table from my MVC project. I have tried:

var db = MyDbContext.Create();
try
{
    var res =
    db.Speakers.SqlQuery("ALTER TABLE [dbo].[Speakers] ADD [LastName] [nvarchar](256) NULL");
}
catch (Exception exception)
{
    Console.WriteLine(exception);
}

its not throwing exception but not updating table. I have no idea whether Raw query allow alteration or not. But I just gave a try. Can any one tell how can I alter database?

Answer 1

Non-query commands can be sent to the database using the ExecuteSqlCommand method on Database. For example:

 using (var context = new BloggingContext()) { context.Database.ExecuteSqlCommand( "UPDATE dbo.Blogs SET Name = 'Another Name' WHERE BlogId = 1"); } 

Note that any changes made to data in the database using ExecuteSqlCommand are opaque to the context until entities are loaded or reloaded from the database.

Entity Framework Raw SQL Queries https://msdn.microsoft.com/en-gb/data/jj592907.aspx

Answer 2

Try this approach:

    db.Database
.ExecuteSqlCommand("ALTER TABLE [dbo].[Speakers] ADD [LastName] [nvarchar](256) NULL");