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>(); 或者 services.AddTransient<U...
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...
今天写了一个方法和接口,需要将接口通过依赖注入的方式注入到Controller里面,但是却出现了InvalidOperationException: Unable to resolve service for type 'WebAPI.Services.IPropertyCheckerService' while attempting to activate 'WebAPI.Controllers.CompaniesController'.在网上搜了之后才发现,需要在StartUp的Service里面注册...
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If you’ve got this error after scaffolding a controller which uses Entity Framework Core like below… it means you haven’t registered your DbContext as a service. You need to do this as thescaffolded controller uses dependency injectionto inject an instance of your DbContext into its co...
针对你提出的“InvalidOperationException: Unable to resolve service for type”异常,这是一个在依赖注入(DI)过程中常见的错误。以下是对该异常的一些详细分析和解决步骤: 1. 确定异常发生的上下文环境 这个异常通常发生在尝试通过依赖注入获取某个服务实例时,但该服务没有在依赖注入容器中注册。这可能发生在ASP.NET...
InvalidOperationException: Unable to resolve service for type 'WebApplication3.Models.SysUserDB' while attempting to activate 'WebApplication3.Controllers.SysUsersController'. 解决办法: Startup.cs ConfigureServices方法内添加 services.AddTransient<WebApplication3.Models.SysUserDB>();...
System.InvalidOperationException: Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContextOptions`1[Microsoft.EntityFrameworkCore.DbContext]' while attempting to activate 'MyProject.Data.MyDbContext'.at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteFactory.CreateArgumentCallSites...
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...
在start.up下添加 接口以及实现类 标签:C#出现的问题 好文要顶关注我收藏该文微信分享 lixia64 粉丝-1关注 -16 +加关注 0 0 升级成为会员 «html颜色代码 ».net 分组groupby筛选表中数据并将查询结果映射到datamodel中 posted @2020-12-23 15:28lixia64阅读(1461) 评论(0)编辑 ...