“unable to resolve service for type”错误解释 在.NET Core或.NET 5/6等现代.NET应用程序中,当你看到“unable to resolve service for type”错误时,这通常意味着依赖注入(DI)容器无法找到或解析你所请求的服务类型的实例。这通常发生在ASP.NET Core MVC、Razor Pages或任何其他使用依赖注入框架的.NET应用程序...
增加了 builder.Services.AddScoped<IFlowCoefficient, FlowCoefficientManageService>(); 仍无效 提示错误 改为builder.Services.AddScoped(typeof(FlowCoefficientManageService));
当遇到Unable to resolve service for type时,要考虑到接口方法是否已经注入: 例如: Unable to resolve service for type 'SaasTestDemo.Application.Queries.IChannelQuery' while attempting to activate 'SaasTestDemo.API.Controllers.ChannelController'. IChannelQuery没有注入到startup中,需添加: 又如Unable to r...
System.InvalidOperationException: Unable to resolve service for type 'System.Net.Http.HttpClient' while attempting to activate 'AutoStateTransitions.Repos.RulesRepo'. at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites(Type serviceType, Type implementationType, CallSite...
The problem is the fact that you are asking for type DbContext in your repository constructor not DBContext, which is your context which inherits from DbContext, that you have registered in your IOC container. Notice the case difference. Your constructor needs to have the DBContext, not Db...
这个代码片段告诉ASP.NET Core在“/swagger”路径下启用Swagger UI,并指定Swagger JSON文件的位置。 结论 通过按照上述步骤,我们就可以成功解决“无法解析类型’Swashbuckle.AspNetCore.Swagger.ISwaggerP’的服务”错误。这个错误通常发生在我们没有正确地将Swashbuckle.AspNetCore库添加到项目中时。
Actual behavior: Encouterd an System.InvalidOperationException: 'Unable to resolve service for typeMicrosoft.Extensions.DependencyInjection.IKeyedServiceProviderwhile attempting to activateApp.NotifyCommand.' Checklist I have looked through existing issues to make sure that this bug has not been reported ...
InvalidOperationException: Unable to resolve service for type 'FW.BLL.UserManager' while attempting to activate 'FW.WebCoreApp.Controllers.UserController'. 解决方法是需要在StartUp的 ConfigureServices(IServiceCollection services)里面注册一下。 services.AddScoped<UserManager>(); ...
"Unable to resolve service for type 'Microsoft.AspNetCore.Hosting.IHostingEnvironment' while attempting to activate the ExcelRender service" If I remove that IHostEnvironment parameter from that service constructor then web job run success without any error. ...
Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContext' while attempting to activate xxx 解决办法 由于底层类的构造函数依赖的是DbContext类,注入的是MyDbContext类,所以无法解析DbContext.需多加一行下面红色的代码 // 注册DbContext...