今天我在应用程序中遇到了一个非常奇怪的问题。在将其移动到另一个文件夹并调用命令dotnet run后，应用程序给出了一个错误：
Unhandled Exception: System.TypeLoadException: Method 'get_Name' in type 'Micros
oft.Extensions.Options.ConfigurationChangeTokenSource`1' from assembly 'Microsof
t.Extensions.Options.ConfigurationExtensions, Version=1.1.2.0, Culture=neutral,
PublicKeyToken=adb9793829ddae60' does not have an implementation.
at Microsoft.Extensions.DependencyInjection.OptionsConfigurationServiceCollec
tionExtensions.Configure[TOptions](IServiceCollection services, IConfiguration c
onfig)
at LicenseManager.Api.Startup.ConfigureServices(IServiceCollection services)
in D:\Projekty\LicenseManager\src\LicenseManager.Api\Startup.cs:line 61
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(ISer
viceCollection services)
at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
at LicenseManager.Api.Program.Main(String[] args) in D:\Projekty\LicenseManag
er\src\LicenseManager.Api\Program.cs:line 15
在我搬家之前，它是正常工作的。
这是我的启动类：
public class Startup
{
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
public IConfigurationRoot Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
services.AddMvc()
.AddJsonOptions(x => x.SerializerSettings.Formatting = Formatting.Indented);
services.AddCors(o => o.AddPolicy("DefaultPolicy", builder =>
{
builder.AllowAnyOrigin();
builder.AllowAnyMethod();
builder.AllowAnyHeader();
}));
services.AddScoped<IComputerRepository, InMemoryComputerRepository>();
services.AddScoped<ILicenseRepository, InMemoryLicenseRepository>();
services.AddScoped<ILicenseTypeRepository, InMemoryLicenseTypeRepository>();
services.AddScoped<IRoomRepository, InMemoryRoomRepository>();
services.AddScoped<IUserRepository, InMemoryUserRepository>();
services.AddScoped<IRoomService, RoomService>();
services.AddScoped<ILicenseTypeService, LicenseTypeService>();
services.AddScoped<IUserService, UserService>();
services.AddScoped<ILicenseService, LicenseService>();
services.AddScoped<IComputerService, ComputerService>();
services.AddScoped<IDataInitializer,DataInitializer>();
services.AddSingleton(AutoMapperConfig.Initialize());
services.Configure<AppSettings>(Configuration.GetSection("app"));
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
//loggerFactory.AddConsole(Configuration.GetSection("Logging"));
//loggerFactory.AddDebug();
//app.UseCors("DefaultPolicy");
app.UseCors(builder =>
builder.WithOrigins("http://localhost:5050").AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin());
loggerFactory.AddNLog();
app.AddNLogWeb();
env.ConfigureNLog("nlog.config");
SeedData(app);
app.UseMvc();
}
private void SeedData(IApplicationBuilder app)
{
var settings = app.ApplicationServices.GetService<IOptions<AppSettings>>();
if(settings.Value.SeedData)
{
var dataInitializer = app.ApplicationServices.GetService<IDataInitializer>();
dataInitializer.SeedAsync();
}
}
}
我尝试着注释掉第61行代码，这一行是：
services.Configure<AppSettings>(Configuration.GetSection("app"));
但是一个应用程序给我抛出了另一个TypeLoadException异常。当我将其推送到Github时也是同样的情况。