static IHostBuilder CreateHostBuilder(string[] args)
{
var hostOut =
Host.CreateDefaultBuilder()
.ConfigureAppConfiguration(
(host_build_context, confBuilder) => {
confBuilder.Sources.Clear();
confBuilder.AddJsonFile("json1.json");
}
);
hostOut.ConfigureServices(
(host_context, services) =>
{
services.Configure <SettingsOptions>(host_context.Configuration.GetSection(SettingsOptions.Settings));
services.TryAddEnumerable(ServiceDescriptor.Singleton <IValidateOptions <SettingsOptions>, ValidateSettingOptions>());
services.AddOptions <SettingsOptions>().
Bind(host_context.Configuration.GetSection(SettingsOptions.Settings)).ValidateDataAnnotations()
.Validate(
(setOptions) => {
if (setOptions.Scale != 0)
{
return(setOptions.VerbosityLevel > setOptions.Scale);
}
else
{
return(true);
}
}, @"Verbosity isn't largert than Scale."
);
var SerProvider = services.BuildServiceProvider();
var i = SerProvider.GetRequiredService <IOptions <SettingsOptions> >();
try
{
SettingsOptions options = i.Value;
}
catch (OptionsValidationException ex)
{
foreach (string exp in ex.Failures)
{
Console.WriteLine($"There is \n{exp}\n");
}
}
}
);
return(hostOut);
}
public ValidationService(IOptions <SettingsOptions> config, ILogger <ValidationService> logger)
{
_config = config;
_logger = logger;
try
{
SettingsOptions options = config.Value;
}
catch (OptionsValidationException ex)
{
foreach (string exp in ex.Failures)
{
_logger.LogError(exp);
}
}
}