Tag: c#
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How can you switch includes on and off in Hotchocolate for EFCore
0 So I’m trying to figure out how to tell EfCore when to apply an include to an IQueryable object based on whether the GraphQl request from the client actually includes the related object. Example: 2 Classes: Person, Payment Theses are kept in 2 different tables and related Person -> Payment in a one to…
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Null checking with primary constructor in C# 12
7 I using C# 12. In C# 12 I can use primary constructor: public class UserService(IUnitOfWork uow) : IUserService { } Before C# 12 I used null checking for items that I inject in constructor: public class UserService : IUserService { private readonly IUnitOfWork _uow; public UserService(IUnitOfWork uow) { ArgumentNullException.ThrowIfNull(uow); _uow = uow; } }…
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Does a const char* literal string persistently exist as long as the process alive?
12 I have functions like the following: const char* get_message() { return "This is a constant message, will NOT change forever!"; }; const char* get_message2() { return "message2"; }; And I’m planning to use them everywhere my app, even though in different threads. I’m wondering about the life time of these strings, i.e. whether it’s…
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The LINQ expression OrderBy DateTimeOffset.DateTime could not be translated
0 I have a .NET Core project in which I have implemented this GraphQL query. The query works correctly, but the sorting by date is not working. [UsePaging(MaxPageSize = 200, IncludeTotalCount = true)] [UseProjection] [UseFiltering] [UseSorting] public async Task<IQueryable<UserDto>> UserMetadatas(string myValue, [Service] ActivityEngineDataContext context,[Service] IMapper mapper) { var entities = context.Users.Where(act => act.MyValue== myValue); return…
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View pre-deserialized response from GraphQL query
1 I have a simple GraphQL query that I’m making out to a server, and trying to use GraphQL.Client.Serializer.Newtonsoft to deserialize it. I’m getting a response, but the response does not make the NewtonsoftJsonSerializer happy. It complains: This converter can only parse when the root element is a JSON Object. Okay, fair enough. The response…
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Are `int main()` and `int main(void)` equivalent prototypes in C23?
11 C23 introduced new semantics in function declarators: 6.7.6.3 Function declarators […] 13 For a function declarator without a parameter type list: the effect is as if it were declared with a parameter type list consisting of the keyword void. A function declarator provides a prototype for the function. This seems to imply that a function…
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Error CS0029 Cannot implicitly convert type ‘System.Threading.Tasks.Task’ to ‘Type’
0 Getting the Error CS0029 Cannot implicitly convert type ‘System.Threading.Tasks.Task<peMove.Maui.Models.ErpPart>’ to ‘peMove.Maui.Models.ErpPart’. It can’t convert the ErpPart type to an ErpPart type?? This is probably fairly straight forward but new to C# (VB coder) and async operations. I have been struggling with a lot and am just not seeing it (or burnt out). MainPage.xmal.cs async…
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How to get access to class IList members through GraphQL?
0 I have a simple Graphql query like this public class Query { public async Task<IPagedList<Book>> Books(int pageIndex, int pageSize) { var data = new List<Book>() { new() { Title = "C# in depth.", Author = new Author { Name = "Jon Skeet" } },new() { Title = "How to cook Phở", Author = new…
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.NET8 supports Vector512, but why doesn’t Vector reach 512 bits?
7 My CPU is AMD Ryzen 7 7840H which supports AVX-512 instruction set. When I run the .NET8 program, the value of Vector512.IsHardwareAccelerated is true. But System.Numerics.Vector<T> is still 256-bit, and does not reach 512-bit. Why doesn’t the Vector<T> type reach 512 bits in length? Is it currently unsupported, or do I need to tweak…
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Deadlocks whenever calling graphQLClient from Maui
0 I am really struggling to get any data returned from a GraphQL Query in Maui. I had the code in the initializer of the Page and was hitting Deadlocks. I get that now. So I have move the code to a button on a page. It is hanging on the line below the Task…
