我正在构建一个控制台.NET Core应用程序.它会定期运行一个可以完成某些工作的方法.如何使ServiceProvider的行为与ASP.NET Core应用程序中的行为相同.我希望它在方法开始执行时解析作用域服务,并在方法结束时处理已解析的服务.
// pseudocode
globalProvider.AddScoped<ExampleService>();
// ...
using (var scopedProvider = globalProvider.CreateChildScope())
{
var exampleService = scopedProvider.Resolve<ExampleService>();
}
参考
Microsoft.Extensions.DependencyInjection包并创建范围：
var services = new ServiceCollection();
services.AddScoped<ExampleService>();
var globalProvider = services.BuildServiceProvider();
using (var scope = globalProvider.CreateScope())
{
var localScoped = scope.ServiceProvider.GetService<ExampleService>();
var globalScoped = globalProvider.GetService<ExampleService>();
}
您也可以轻松测试它：
using (var scope = globalProvider.CreateScope())
{
var localScopedV1 = scope.ServiceProvider.GetService<ExampleService>();
var localScopedV2 = scope.ServiceProvider.GetService<ExampleService>();
Assert.Equal(localScopedV1,localScopedV2);
var globalScoped = globalProvider.GetService<ExampleService>();
Assert.NotEqual(localScopedV1,globalScoped);
Assert.NotEqual(localScopedV2,globalScoped);
}
