All Questions
362
questions
0
votes
1
answer
69
views
String interpolation inside a formattable string in C#
I am in the process of replacing Dapper with EF Core in a project. Specifically using the new Database.SqlQuery and Database.ExecuteSql functionality with EF Core. I like how they use ...
- 151
1
vote
1
answer
95
views
How to properly manage and dispose SqlConnection with SqlCredential in EF Core using Dependency Injection?
I am working on an ASP.NET Core project where I am using SqlCredential for database authentication, provided by a SqlCredentialProvider which is designed as a singleton to ensure a single instance ...
- 26
0
votes
0
answers
34
views
Entity Framework Core not recognising mapped user-defined function
I'm using Entity Framework Core with .NET 8 and trying to call a user-defined function from C# code.
I'm following the instructions here but have a slightly different use case. Rather than having the ...
- 483
0
votes
0
answers
41
views
Overriding identity tables properties / columns in EF Core 8 has no effect
I'm overriding the IdentityRole / IdentityClaim, etc.
However, I've noticed that some of these fields has no effect either in Fluent API or via attributes.
Class that overrides IdentityRole<Guid>...
- 2,626
0
votes
0
answers
41
views
Trouble Determining Dependent Side in One-to-One Relationship with Entity Framework Core
I'm currently working on a project using Entity Framework Core in a .NET Core application. I'm having trouble determining the dependent side in a one-to-one relationship between the User and Account ...
1
vote
1
answer
51
views
Group by, count distinct SQL query to IQueryable using Linq
I am trying to translate the following SQL into IQueryable, so I can access the result and filter on different conditions, before the data is retrieved from the database,
but I get an error that the ...
- 93
1
vote
1
answer
59
views
Using FromSql or FromSqlInterpolated
According to this documentation (https://www.learnentityframeworkcore.com/raw-sql/from-sql) you should do this:
string value = "value";
_dbContext.Set<T>().FromSqlInterpolated($"...
- 597
0
votes
2
answers
82
views
Bulk Insert not respecting Id column with Linq2Db and Entity Framework Core
I am using LINQ to DB with the linq2db.EntityFrameworkCore for bulk-entering of some records.
With EF, I just save the records with a 0 in the Id property and they use the sequence I set up on the ...
- 5,790
1
vote
0
answers
65
views
Table Design for Calculating Median Over User-Defined Period from Pre-Processed Data
I’m working with a table that contains pre-processed data from several other tables. This data is segmented by a time period (like a day) to speed up queries that could take minutes if I had to ...
- 21
1
vote
0
answers
142
views
Converting SQL ROW_NUMBER to Linq produces wrong translation
I have the following SQL code and I want to convert it to a LINQ query in Entity Framework Core 8.
SELECT *
FROM(
SELECT ROW_NUMBER() OVER (PARTITION BY StaffId,[Location] ORDER BY [Timestamp] ...
- 1,007
0
votes
1
answer
407
views
How to use raw SQL query in EF Core get the expected result set in .net core
I am trying to use raw SQL in .NET Core instead of normal EF Core approach.
Here is my query and what I am trying to do with it.
Entities used here are in a one-to-many relationship as one project can ...
- 115
0
votes
0
answers
57
views
LINQ, first record in each group only if condition inside FirstOrDefault is met
I have a main table and a table that contains the translations of this table.
Table1
Id
Description
Table2
Table1_Id
Language
TranslatedValue
To get the grouped values I can left join the first ...
- 71
1
vote
1
answer
114
views
Deleting an EF Core entity ONLY if it's no longer referenced by parents
Say I have a table called Address which is referenced by Order, Person and Supplier.
Let's say I have a method UpdateOrderAddress that changes the order's address:
public async Task UpdateOrderAddress(...
- 4,285
3
votes
1
answer
879
views
How to use EF Core and .NET 8 to upsert into a table with many-to-many relationship?
With EF Core and .NET 8, suppose that I used the database scaffolding tool to generate entity classes that look like this:
public partial class Person
{
public int Id { get; set; }
public ...
- 32.1k
-1
votes
1
answer
627
views
EF Core 8 does not inject parameters in raw SQL query
I need to build a raw SQL query and I am using the new EF Core 8. But when it executes the query, it seems that the parameters are not getting replaced.
private static FormattableString ...
- 2,437