我有一個名為 Persistence.EFCore 的類別庫包含這個方法
public static IServiceCollection AddPersistenceServices(this IServiceCollection services, IConfiguration configuration)
{
services.AddDbContext<SIMContext>(options =>
options.UseSqlServer(configuration.GetConnectionString("ConnectionString")));
services.AddTransient<IUnitOfWork, UnitOfWork>();
return services;
}
這是我在 winform 專案中 Program.cs 的代碼
public static IConfiguration Configuration { get; }
[STAThread]
static void Main()
{
ApplicationConfiguration.Initialize();
var builder = new HostBuilder()
.ConfigureAppConfiguration((hostContext, builder) =>
{
builder.AddJsonFile("apsettings.json", optional: true, reloadOnChange: true);
})
.ConfigureServices((hostContext, services) =>
{
services.AddScoped<XtraMain>();
services.AddPersistenceServices(Configuration);
services.AddApplicationServices();
services.AddTransient<FrmExpressionOfNeeds>();
services.AddSingleton<IFormFactory, FormFactory>();
});
var host = builder.Build();
using (var serviceScope = host.Services.CreateScope())
{
IServiceProvider services = serviceScope.ServiceProvider;
XtraMain mainform = services.GetRequiredService<XtraMain>();
System.Windows.Forms.Application.Run(mainform);
}
}
我找不到設定配置值的方法。
IConfiguration 中的配置應該從
Configuration = builder.Build();
但就我而言
services.AddPersistenceServices(Configuration);
在構建之前出現
uj5u.com熱心網友回復：
ConfigureService((context, services)=>{ ... })的第一個引數是HostBuilderContext ，它使您可以使用其Configuration屬性訪問配置。
因此，假設您有一個接受配置的服務擴展方法，那么您可以使用context.Configuration.
例子
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.DependencyInjection;
internal static class Program
{
[STAThread]
static void Main()
{
ApplicationConfiguration.Initialize();
var host = CreateHostBuilder().Build();
Application.Run(host.Services.GetRequiredService<Form1>());
}
static IHostBuilder CreateHostBuilder() =>
Host.CreateDefaultBuilder()
.ConfigureServices((context, services) =>
{
services.AddHelloServices(context.Configuration);
services.AddTransient<Form1>();
});
}
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