Notatki dla .NET w języku programowania C#

ActionBar actionBar = getSupportActionBar();
actionBar.setHomeButtonEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeAsUpIndicator(R.mipmap.ic_arrow_back_white_24dp);
actionBar.setDisplayShowHomeEnabled(true);

getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayUseLogoEnabled(true);
getSupportActionBar().setLogo(R.drawable.ic_logo);
getSupportActionBar().setDisplayShowTitleEnabled(false); //optional

getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setIcon(R.drawable.ic_logo); //also displays wide logo
getSupportActionBar().setDisplayShowTitleEnabled(false); //optional

Entity core manual
https://docs.microsoft.com/en-us/ef/core/modeling/relationships#many-to-...

-----------
Zero to One

You can do it declaring your foreign key like in the following:

public class Blog
{

public int BlogId { get; set; }
public List Posts { get; set; }

}

public class Post
{
public int PostId { get; set; }
public int? PostId { get; set; }
public virtual Blog Blog { get; set; }
}

M2M

Creating:
1. Create new XY
2. Set XY.X = New X
3. Set XY.Y = New Y
4. Db.SaveChanges()

Deleting:
1. Find and delete XY
2. Db.SaveChanges()

Thanks,

Jeff Bowman

Fairbanks, Alaska

https://docs.microsoft.com/en-us/ef/core/providers/mysql/
http://insidemysql.com/howto-starting-with-mysql-ef-core-provider-and-co...

https://docs.microsoft.com/en-us/ef/core/providers/pomelo/

https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/intro

https://krystiankolad.wordpress.com/2017/08/28/docker-czesc-iv-baza-mssq...