All Questions
33,062
questions
0
votes
0
answers
29
views
Binding data inside a DataGrid inside a DataGrid.RowDetailsTemplate / C# WPF
I'm learning C# and WPF for a personal project that I'll use for my job.
I'm trying to create a DataGrid inside another DataGrid. Specifically, I want my first SQL query to display some data, and when ...
- 9
0
votes
2
answers
62
views
Why do I need to model a join table class?
I have two classes in C#:
public class Student
{
public string Name {get; set;}
public string Email {get; set;}
public List<Course> Courses {get; set;}
}
public class Course
{
...
- 410k
0
votes
0
answers
29
views
Error "To change the IDENTITY property of a column, the column needs to be dropped and recreated."
I'm a beginner and i am having this error when i use the update-data base, after the migration:
"To change the IDENTITY property of a column, the column needs to be dropped and recreated."
...
0
votes
2
answers
1k
views
Improve SqlBulkCopy performance on high amount of nvarchar(max)
I want to copy data between two tables with SqlBulkCopy. So first I defined a statement that contains the where clause (where ID IN (...)) in my table that defines which entries should be copied.
(In ...
0
votes
2
answers
57
views
Logic edits all existing rows instead of adding new when using Save stored procedure
I have an issue regarding SQL stored procedures. I have connected my SQL Server db to my ASP.NET Web Forms app and have created a button that uses Stored Procedures to Save data inside the db.
I only ...
- 47.2k
-3
votes
1
answer
80
views
I cannot modify the table in my database with C# [closed]
I created a database and a table in Microsoft SQL Server, and I want to do some experiments with it in C#. I successfully connected to my database and I can read the first row of the table, too. But ...
- 11
3
votes
1
answer
88
views
Join tables with condition that all row values are unique
I have tables Machine and Inventory. In table Machine I have last running inventory properties. In table Inventory, I have new inventory id and properties (Not yet run in machine).
I have to return a ...
- 24.6k
0
votes
1
answer
33
views
Transaction Log for database is full because update file about 100mb
I try to insert the data of a file about 100mb in size by splitting it into parts, each about 65,000 characters into the sql server. The first time I insert it and the next time I update that data. ...
- 21
2
votes
5
answers
11k
views
Unable to create a 'DBContext'
i have the following error message:
Unable to create a 'DbContext' of type ''. The exception 'No database provider has been configured for this DbContext. A provider can be configured by overriding ...
- 4,897
0
votes
0
answers
28
views
Use some kind of helper function In EF Select query to make subquery [duplicate]
I have several tables that handles different kinds of translations for my entities and those tables to linked via relations to other entities.
I use subquery to directly access translations tables ...
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 ...
- 128k
389
votes
9
answers
501k
views
What represents a double in sql server?
I have a couple of properties in C# which are double and I want to store these in a table in SQL Server, but noticed there is no double type, so what is best to use, decimal or float?
This will store ...
- 39
8
votes
5
answers
12k
views
The named 'CommandType' does not exist in the current context
Can someone help me understand why I'm getting that error here?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Threading.Tasks;...
- 483
0
votes
0
answers
33
views
How to map value objects in dapper
i have the following entity
using MedRaise.Domain.Enums;
namespace MedRaise.Domain.Entities;
public class Appointment : Entity
{
private Guid _clinicId;
private DateTime _date;
private ...
2
votes
0
answers
59
views
How to convert this SQL query to NHibernate IQueryable query?
I have to create a query similar to the one below to paginate a parent-child query:
SELECT v.ProductId, MAX(v.Price) AS Price
FROM Variant v
GROUP BY v.ProductId
ORDER BY Price ASC;
I am using C# ...
