由于您更改了环境，例如本地笔记本电脑到产品服务器

Since you changed environments, for e.g. local laptop to prod server

对于生产环境，请检查并更新您的数据目录.

For production, check and update your data directory.

数据源=(LocalDB)\ MSSQLLocalDB; AttachDbFilename = | DataDirectory | \ SeedDb.mdf;集成安全性= True; MultipleActiveResultSets = True;".

"Data Source = (LocalDB)\MSSQLLocalDB; AttachDbFilename =|DataDirectory|\SeedDb.mdf; Integrated Security=True;MultipleActiveResultSets=True;".

调试硬编码目录路径，如果可以，则可以为 = | DataDirectory | \ SeedDb.mdf 设置环境变量然后在安全性(右键单击文件夹)下的目录中检查服务器/角色

to debug Hard code the directory path, if it works you can set you env variable for =|DataDirectory|\SeedDb.mdf Then check server/roles for the dir under security (right click folder)