於CORE 3.1 使用 EntityframeworkCore 留意套件使用,於startup註冊時
services.AddDbContext<DocumentMgrContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DMGRContext")));
會報下列錯誤:
Entity Framework core : DbContextOptionsBuilder' does not contain a definition for 'usesqlserver' and no extension method 'usesqlserver'
PM > Install-Package Microsoft.EntityFrameworkCore.SqlServer
如果是直接從nuget下載 Microsoft.EntityFrameworkCore 則因該method不存在,正確的安裝套件為上述