entity-framework-core

问题 I'm trying to achieve something in EF Core that worked very well for me in EF 6. I'm serializing the contents of a List<T> property as a Json string in the DB. <T> can be pretty much anything, since Json.Net takes care of serializing whatever we throw at it. My collection exposes a Json string property and takes care of serializing/deserializing itself. This approach is convenient and efficient for structured nested data where a relational model would bring needless overhead and complexity.

问题 I'm trying to achieve something in EF Core that worked very well for me in EF 6. I'm serializing the contents of a List<T> property as a Json string in the DB. <T> can be pretty much anything, since Json.Net takes care of serializing whatever we throw at it. My collection exposes a Json string property and takes care of serializing/deserializing itself. This approach is convenient and efficient for structured nested data where a relational model would bring needless overhead and complexity.

问题 Example 1 below used to work but it is not working in EF Core. Question : How to make example 2 below work? Example 1 : child c1 = new child(); child c2 = new child(); parent p=new parent(); p.child.Add(c1); p.child.Add(c2); using (var db = new DbContext()) { db.parent.Add(p); db.SaveChanges(); } Entity Parent P has children C1, and C2 in a one-to-one relationship. Trying to insert a parent and its children records. But in the following code VS2017 's editor's intellisense does not recognize

问题 Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 months ago . Improve this question I'm following one of Mosh Hamedani Course on ASP.NET MVC in Udemy. I came across one error while designing my Database using code-first (Entity Framework). At first, I got the error of " No DbContext was found in assembly" . After resolving this problem

问题 I currently have an efcore 2.1 project with about 230 entities and about 350 migrations. Every time i add an efcore migration, a designer file is created. This file is approximately 535 kb and growing (150mb total for alle designer files). This makes the IDE slow and unresponsive, refactoring is a no go, it also makes the build process slower. If i delete all designer files, the build goes down from 110 to 20 seconds, and the IDE gets snappy again. however, once I delete all designer files, i

问题 I currently have an efcore 2.1 project with about 230 entities and about 350 migrations. Every time i add an efcore migration, a designer file is created. This file is approximately 535 kb and growing (150mb total for alle designer files). This makes the IDE slow and unresponsive, refactoring is a no go, it also makes the build process slower. If i delete all designer files, the build goes down from 110 to 20 seconds, and the IDE gets snappy again. however, once I delete all designer files, i

问题 How do you add and use an SQLite database in an ASP.NET Core web application, using EntityFramework 7 ? I dived into ASP.NET Core the moment I heard about it and created my first web application, I suddenly had a bunch of data that I wanted to store and SQLite seemed like the obvious choice. Since I wanted it to stay with my application, keep it lightweight, simple and avoid setting up a separate database. So how would one go about creating an SQLite database in ASP.NET Core? ASP.NET Core -

问题 I've been working through the following tutorial on how to create a many-to-many relationship using Entity Framework Core: https://docs.microsoft.com/en-us/ef/core/modeling/relationships. I'm working on a group management feature and my models are the following: public class Group { public int GroupId { get; set; } public string GroupName { get; set;} public virtual List<GroupMember> GroupMembers { get; set; } = new List<GroupMember>(); } public class GroupMember { public int GroupId { get;

问题 I've been working through the following tutorial on how to create a many-to-many relationship using Entity Framework Core: https://docs.microsoft.com/en-us/ef/core/modeling/relationships. I'm working on a group management feature and my models are the following: public class Group { public int GroupId { get; set; } public string GroupName { get; set;} public virtual List<GroupMember> GroupMembers { get; set; } = new List<GroupMember>(); } public class GroupMember { public int GroupId { get;

问题 I am new to asp.net core. So this might not be a good question. I have 3 classes: Admin , Doctor , Patient . I want all those users to be able to login and see their dashboard. All of them will have different level of access. So I derived these classes from IdenetityUser like this: public class Admin : IdentityUser { } public class Doctor : IdentityUser { public const int MaxAppointPerDay = 28; public Gender Gender { get; set; } } public class Patient : IdentityUser { public DateTime