实体框架6从列表中保存 [英] Entity framework 6 save from list
问题描述
你好
我参与了我的第一个EF6项目，我有几个问题
项目概述
物业（大楼）有房间
房间有标准或评级列表
每个标准都有一组价值
即
物业（大楼）A有
房间1
每个房间都有很多价值
价值0-1
价值B 2-5 ......等
房间2
每个房间有一堆价值
价值a 1-3
价值B 0-5 ...等
物业（大楼）B有
房间1
每个房间都有一堆价值
价值0-1
价值B 4-9
价值c 0-1 ......等
房间2
每个房间都有很多价值
Val你是1-3
价值B 0-4 ...等
...
因此，一个属性（建筑物）本身就有一个房间列表，每个房间都有自己的价值
因此，数据库设计是
物业1 ... N客房
客房1 ... N价值
这些价值可根据需要修改
我使用EF6来处理数据库，而Caliburn.Micro BindableCollection
使用DbSet从数据库中提取数据
现在，困境是保存Rooms及其值而不重复，我尝试使用循环更新dbSet，但这只会导致数据重复。
我无法找到一种方法从数据中清空DbSet而不回复意大利面条代码，我试图避免使用
我的问题是如何将数据保存到数据库中没有
1-复制
2-意大利面条和非常难看的代码
3-删除我正在使用的框架
提前感谢
我尝试了什么：
空DBContext及其DbSet
将ICollection转换为DbSet
成功保存，但重复数据
Hello
I am on my first EF6 project and I have couple of questions
Project outlines
Property (Building) have Rooms
A Room have list of criteria or rating
Each criteria own a set of values
i.e.
Property (Building) A have
Room 1
Each room have bunch of values
Value a 0-1
Value B 2-5 ... etc.
Room 2
Each room have bunch of values
Value a 1-3
Value B 0-5 ... etc.
Property (Building) B have
Room 1
Each room have bunch of values
Value a 0-1
Value B 4-9
Value c 0-1 ... etc.
Room 2
Each room have bunch of values
Value a 1-3
Value B 0-4 ... etc.
...
Therefore, by nature a property (Building) have a list of rooms, each room have its own values
Therefore, the database design is
Property 1...N Rooms
Rooms 1...N Values
These values can be modified on desire
I am using EF6 to handle the DB, and Caliburn.Micro BindableCollection
Pulling the data from the DB using DbSet
Now, the dilemma is to save the Rooms and its values without duplication, I tried updating the dbSet using the loops but that only caused data duplication.
I could not find a way to empty the DbSet from its data without reverting to spaghetti code, which I’m trying to avoid
My Question is How to save the data to the DB without
1- Duplication
2- Spaghetti and very ugly code
3- Dropping the frameworks I am using
thanks in advance
What I have tried:
Empty DBContext and its DbSet
Convert ICollection to DbSet
Saved successfully but with Duplicated data
推荐答案
正确
首先抱歉粗糙的英语，我现在很乱了
解决方案是如下：
循环通过现有的主要类别（物业（建筑物））
for Property.Count
属性[i] .Rooms = inProperty [i] .Rooms
等等其他嵌套列表
PropertyDBContext.SaveChanges（）;
如果你们有更好的解决方案，我将永远欢迎c& c
Right
first of all sorry for the rough English, I am a mess right now
the solution is as follows:
Loop through the existing Main categories (Property(Building))
for Property.Count
Property[i].Rooms = inProperty[i].Rooms
So on and so forth for the other nested lists
PropertyDBContext.SaveChanges();
if you guys have a better solution i will always welcome c&c
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