摘要:
var result = from u in db.Order join n in db.Equipment on u.OrderId equals n.OrderId into temp from m in temp.DefaultIfEmpty() select new { OrderID = 阅读全文
摘要:
在程序包管理器控制台 1.执行:Enable-Migrations -Force 生成:Migrations 2 修改AutomaticMigrationsEnabled默认为false改为true 3.执行:Update-Database -Verbose -Script 生成迁移sql语句,如 阅读全文