我想将Visual Studio 2019与SQL Server 2014 Studio连接起来并创建迁移。值不能为null。 (参数'connectionString');我收到我找不到解决方案的错误。你能帮我吗?注意:我不在应用程序中使用ado.net
appsettings.json
{
"ConnectionStrings": {
"LibraryConnection": "DESKTOP-NHG0GU1\\SQLEXPRESS;Database=Library_Dev;Trusted_Connection=True;MultipleActiveResultSets=true"
},
"Logging": {
"IncludeScopes": false,
"LogLevel": {
"Default": "Warning"
}
}
}
Context.cs
using Microsoft.EntityFrameworkCore;
namespace MusicStoreRazor.UI.Models
{
public class MusicStoreListContext:DbContext
{
public MusicStoreListContext(DbContextOptions<MusicStoreListContext> options):base(options)
{
}
public DbSet<Music> Musics { get; set; }
}
}
尝试在startup.cs中设置连接字符串映射,因为您没有在Dbcontext本身中映射它。