public static void InitDbProviders(DbConnectionConfiguration configuration)
{
foreach (DbConnectionStringSettings connectionStringSettings in configuration.ConnectionStrings)
{
DbConnectionProviderSettings providerSettings = configuration.Providers.SingleOrDefault(s => s.Name == connectionStringSettings.ProviderName);
Type providerType = Type.GetType(providerSettings.OriginType);
IDbFactoryProvider provider = (IDbFactoryProvider)Activator.CreateInstance(providerType);
providers.Add(new Tuple <string, string, IDbFactoryProvider>(connectionStringSettings.Name, connectionStringSettings.ConnectionString, provider));
}
}
public static DbContextOptionsBuilder UseDb <TContext>(this DbContextOptionsBuilder builder, DbConnectionConfiguration configuration) where TContext : DbContextBase
{
var attribute = typeof(TContext).GetTypeInfo().GetCustomAttribute <EntityDbNameAttribute>(false);
MicroStrutLibraryExceptionHelper.IsNull(attribute, typeof(DbContextOptionsBuilderExtensions).FullName, LogLevel.Error, "名称属性为空！");
return(UseDb(builder, configuration, attribute.Name));
}
public static DbContextOptionsBuilder UseDb(this DbContextOptionsBuilder builder, DbConnectionConfiguration configuration, string dbName)
{
MicroStrutLibraryExceptionHelper.IsNull(configuration, typeof(DbContextOptionsBuilderExtensions).FullName, LogLevel.Error, "配置为空！");
MicroStrutLibraryExceptionHelper.IsNullOrEmpty(dbName, typeof(DbContextOptionsBuilderExtensions).FullName, LogLevel.Error, "链接数据库为空！");
DbConnectionStringSettings connectionStringSettings = configuration.ConnectionStrings.SingleOrDefault(s => s.Name == dbName);
MicroStrutLibraryExceptionHelper.IsNull(connectionStringSettings, typeof(DbContextOptionsBuilderExtensions).FullName, LogLevel.Error, $"链接数据库{dbName}对应的配置节为空！");
DbConnectionProviderSettings providerSettings = configuration.Providers.SingleOrDefault(s => s.Name == connectionStringSettings.ProviderName);
MicroStrutLibraryExceptionHelper.IsNull(providerSettings, typeof(DbContextOptionsBuilderExtensions).FullName, LogLevel.Error, $"链接数据库{dbName}对应的提供者配置为空！");
Type providerType = Type.GetType(providerSettings.Type);
IDbContextOptionsBuilderProvider provider;
if (string.IsNullOrEmpty(providerSettings.Parameter))
{
provider = (IDbContextOptionsBuilderProvider)Activator.CreateInstance(providerType);
}
else
{
provider = (IDbContextOptionsBuilderProvider)Activator.CreateInstance(providerType, providerSettings.Parameter);
}
return(provider.UseDb(builder, connectionStringSettings, providerSettings));
}