英文:
Could not create database using package manager console in .NET 7.0
问题
我现在正在学习 .NET 并跟着课程学习，我的目标是创建 CRUD 应用程序，所以我需要一个数据库来配合。我成功创建了初始迁移，但数据库更新无法工作。
如果连接字符串看起来像这样，我会收到以下错误：
"ConnectionStrings": {
"QuotesAppContext": "Server=(localdb)\\mssqllocaldb;Database=QuotesAppContext-811c920d-aeb7-4d04-8ba6-5c9a48d8b492;Trusted_Connection=True;MultipleActiveResultSets=true"
}
> (provider: SNI_PN11, error: 50 - 本地数据库运行时出错。无法创建自动实例。请查看 Windows 应用程序事件日志以获取错误详情。
我已经在 Windows 11 上安装了 SQL Server 和 SQL 管理器，没有问题。如果我将连接字符串更改为这样：
"ConnectionStrings": {
"QuotesAppContext": "Server=(localdb)\mssqllocaldb;Database=QuotesAppContext-811c920d-aeb7-4d04-8ba6-5c9a48d8b492;Trusted_Connection=True;MultipleActiveResultSets=true"
}
删除了反斜杠之后，现在出现问题：
> 无法创建类型为 'QuotesAppContext' 的对象。
对我来说，这似乎是一个无休止的循环，感谢您的帮助。请指导如何执行 database-update 并使数据库实例正常工作。
英文:
Im learning .net now and following along the course,my goal is to create CRUD app so i need a database to work with it, i have succesfuly created initial migration but database-update doesnot work
> (provider: SNI_PN11, error: 50 - Local Database Runtime error
> occurred. Cannot create an automatic instance. See the Windows
> Application event log for error details.
im getting this error if connection strings look like this
"ConnectionStrings": {
"QuotesAppContext": "Server=(localdb)\\mssqllocaldb;Database=QuotesAppContext-811c920d-aeb7-4d04-8ba6-5c9a48d8b492;Trusted_Connection=True;MultipleActiveResultSets=true"
}
i have installed both sql server and sql management on windows 11 without problem
and if i change connection string to this
"ConnectionStrings": {
"QuotesAppContext": "Server=(localdb)\mssqllocaldb;Database=QuotesAppContext-811c920d-aeb7-4d04-8ba6-5c9a48d8b492;Trusted_Connection=True;MultipleActiveResultSets=true"
}
deleting \ problem now is
> Unable to create an object of type 'QuotesAppContext'.
so it seems like an endless circle to me, thanks you for your help
write database-update and get database instance working
答案1
得分: 0
我找到了对我有用的答案，在regedit中找到此文件夹
"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft SQL Server\UserInstances"
然后删除其中的所有内容，之后再次运行Update-Database命令，一切都应该正常工作。
附言
我尝试重新安装SQL Server，添加端口，但这个解决方案对我有用。
英文:
I find the answer which have worked for me,find this folder in regedit
"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Microsoft SQL Server\UserInstances"
and delete everything inside of it,and after that run Update-Database command again everything should work fine
P.S
i have tried reinstalling sql server,adding ports, but this solution worked for me
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