无法添加迁移：system.invalidoperationException：无法解析类型的服务＆＃x27; Microsoft.entityframeworkcore.dbcontextoptions＆＃x27;

发布于 2025-02-12 17:30:03 字数 1982 浏览 1 评论 0 原文

尝试为我的.NET Core 6.0项目添加迁移时，我会收到以下错误：在类“程序”上没有找到静态方法“ Create -HostBuilder（String []）'。找不到应用服务提供商。在项目中查找DBContext类... 找到dbContext'applicationdbContext'。 Microsoft.EntityFrameWorkCore.Design.OperationException：无法创建类型“ ApplicationDbContext”的对象。有关设计时间支持的不同模式，请参见 https：//go.microsoft.com/microsoft.com/fwlink /？linkID = 851728 ---＆gt; system.invalidoperationException：无法解析“ Microsoft.entityFrameWorkCore.dbContextOptions”类型的服务，同时尝试激活'dataAccess.data.applicationdbcontext'。

我的项目结构看起来像这样：在此处输入图像描述

使用我的dataAcess项目，包含我的代码第一个结构，我的applicationdbcontext代码是：

    public class ApplicationDbContext : IdentityDbContext<IdentityUser>
{
    public ApplicationDbContext(DbContextOptions options)
    : base(options)
    {
    }

    public ApplicationDbContext() { }


    public DbSet<Attachment> Attachments { get; set; }
    public DbSet<Column> Columns { get; set; }
    public DbSet<DevopsBoard> DevopsBoards { get; set; }
    public DbSet<DevopsBug> DevopsBugs { get; set; }
    public DbSet<Priority> Priorities { get; set; }
    public DbSet<Project> Projects { get; set; }
    public DbSet<Severity> Severities { get; set; }

}

i在EF CLI中尝试了以下选项：添加迁移第一个-startupproject dataAccess -verbose

add -Orgration首先-Project issuemaster -startupproject dataAccess -Verbose

可以给我一些指导吗？

我已经尝试了以下方面的尝试：

原文

When attempting to add a migration for my .net core 6.0 project, I get the following error:
No static method 'CreateHostBuilder(string[])' was found on class 'Program'.
No application service provider was found.
Finding DbContext classes in the project...
Found DbContext 'ApplicationDbContext'.
Microsoft.EntityFrameworkCore.Design.OperationException: Unable to create an object of type 'ApplicationDbContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728
---> System.InvalidOperationException: Unable to resolve service for type 'Microsoft.EntityFrameworkCore.DbContextOptions' while attempting to activate 'DataAccess.Data.ApplicationDbContext'.

My project structure looks like this:
enter image description here

with my dataacess project containing my code first structure, my ApplicationDbContext code is:

    public class ApplicationDbContext : IdentityDbContext<IdentityUser>
{
    public ApplicationDbContext(DbContextOptions options)
    : base(options)
    {
    }

    public ApplicationDbContext() { }


    public DbSet<Attachment> Attachments { get; set; }
    public DbSet<Column> Columns { get; set; }
    public DbSet<DevopsBoard> DevopsBoards { get; set; }
    public DbSet<DevopsBug> DevopsBugs { get; set; }
    public DbSet<Priority> Priorities { get; set; }
    public DbSet<Project> Projects { get; set; }
    public DbSet<Severity> Severities { get; set; }

}

I have tried the following options in the EF cli:
add-migration first -startupproject dataaccess -verbose

add-migration first -Project issuemaster -startupproject dataaccess -verbose

Can anybody give me some guidance?

I have tried the stuff on: 'Unable to resolve service for type ¨Microsoft.entityFrameworkCore.DbContextOptions¨1[LibraryData.LibraryContext] while attempting to activate