MoneyFox模板解析-DataLayer

 

 【注意】：重载OnConfiguring和之前EF版本中的OnModelCreating创建模型不一样，OnModelCreating创建模型上下文只实例化一次，但是OnConfiguring每实例化一个上下文时都会被调用一次，所以OnConfiguring能充分利用上下文中的构造函数或者其他数据。

 1  public static class DatabasePathHelper
 2     {
 3         private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
 4 
 5         private const string DATABASE_NAME = "moneyfox3.db";
 6 
 7         public static string GetDbPath()
 8         {
 9             string databasePath = "";
10             switch (ExecutingPlatform.Current)
11             {
12                 case AppPlatform.iOS:
13                     SQLitePCL.Batteries_V2.Init();
14                     databasePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "..", "Library", DATABASE_NAME);
15                     break;
16                 case AppPlatform.Android:
17                     databasePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), DATABASE_NAME);
18                     break;
19 
20                 case AppPlatform.UWP:
21                     databasePath = DATABASE_NAME;
22                     break;
23 
24                 default:
25                     throw new NotSupportedException("Platform not supported");
26             }
27 
28             Logger.Debug(CultureInfo.CurrentCulture, "Database Path: {dbPath}", databasePath);
29             return databasePath;
30         }
31     }

DatabasePathHelper

下面是该方式的使用效果

https://docs.microsoft.com/zh-cn/ef/core/miscellaneous/configuring-dbcontext

 

https://www.cnblogs.com/CreateMyself/p/6224141.html

 1  public void ConfigureServices(IServiceCollection services)
 2         {
 3             services.AddMvc();
 4             var connection = Configuration
 5                 .GetConnectionString("DefaultConnection");
 6             services.AddDbContext<CRMContext>(
 7                 options => options.UseSqlServer(connection,
 8                 //MigrationsAssembly 配置为该上下文维护迁移的程序集。
 9                 b => b.MigrationsAssembly("DataLayer")));
10         }

 

转载于:https://www.cnblogs.com/Spinoza/p/11440452.html