使用实体框架将json对象添加为数据库中的BLOB

Question

I am new with the entity framework. I have a dashboard with widgets and this is my table in Microsoft SQL server.

The reason I have widgets as a blob and not as a seperated entity is because I am not gonna query on the widgets table. Only data like SELECT * FROM Dashboard WHERE dashboardid =x

This is my DashboardDAL class:

public class DashboardDAL
{
    public Dashboard GetDashboardPerUser()
    {
        throw new NotImplementedException();
    }

    public string AddWidget()
    {
        throw new NotImplementedException();
    }
}

I want to add a widget with the entity framework. A Json object of a widget looks like this:

{name:"Weather", dashboardid:"2", userID:"4", "x":1,"y":0,"width":3,"height":1}

How can I add a widget object and save it as a BLOB in the database?

Kind regards

Answer 1

JSON is a string. Use a string property on an entity to store it with EF. This will map to a NVARCHAR(MAX) column in SQL Server, which is the correct type for storing JSON in SQL Server.