如何在其他位置创建数据库而不是在 ASP.NET Core 2.2 中的默认哺乳期 c:\\Users\\USER

Question

I want to create database in a folder in my project, but by default the database is created in C:\\Users\\USER.

This is my appsetting.json :

"ConnectionStrings": {
    "MvcMusicStoreContext": 
      "Server=(localdb)\\mssqllocaldb;Database=MvcMusicStoreContext;Trusted_Connection=True;MultipleActiveResultSets=true"

  }

How to change database location to another folder in my computer. I use asp.net core 2.2 in Visual Studio 2017

Answer 1

i change ConnectionStrings with AttachDBFileName:

"ConnectionStrings": {
    "MvcMusicStoreContext":
    //"Server=(localdb)\\mssqllocaldb;Database=MvcMusicStoreContext;Trusted_Connection=True;MultipleActiveResultSets=true"
    "Server=(localdb)\\MSSQLLocalDB;AttachDBFilename=[DataDirectory]\\App_Data\\MvcMusicStoreContext.mdf;Trusted_Connection=True;MultipleActiveResultSets=true"

  }

and in ConfigureServices in startup:

string path = Directory.GetCurrentDirectory(); 

  services.AddDbContext<MvcMusicStoreContext>(options =>
                  options.UseSqlServer(Configuration.GetConnectionString("MvcMusicStoreContext")
                  .Replace("[DataDirectory]",path)));

Answer 2

Unfortunately, the above solution did not work in VS2019 (16.8.4) in my Razor project (Core 3.1):

An attempt to attach an auto-named database for file C:\WebApplication1\App_Data\WebApp1db.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

The solution was to add Initial Catalog=MyNotAutoNamedDb; to appsetting.json project file. Before that, you should also create the App_Data directory specified in the path.

appsettings.json

{
"ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;AttachDBFilename=[DataDirectory]\\App_Data\\WebApp1db.mdf;Initial Catalog=MyNotAutoNamedDb;Trusted_Connection=True;MultipleActiveResultSets=true"
  }

Startup.cs

string path = Directory.GetCurrentDirectory();

services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(
        Configuration.GetConnectionString("DefaultConnection")
        .Replace("[DataDirectory]", path)));

Please also don't forget to add using System.IO; to your Startup.cs file. I tested the solution creating model, adding migration and updating database using EF, works without problems with the database file in the project structure.