.net

问题 I am retrieving a list of entities from a table FattureFornitori , and loading also a collection owned by them (Voci, plural form - Voce, singular form) and a reference from each Voce to a TipoCosto entity: var db = new DbGestPre(); db.Configuration.ProxyCreationEnabled = false; var s = db.FattureFornitori .Include(x => x.Voci) .Include(x => x.Voci.Select(y => y.TipoCosto)) .AsNoTracking().ToList(); Now, multiple Voci within a single FattureFornitori can reference the same TipoCosto . So,

问题 Let's assume there are classes: public class Foo { public List<Bar> Bars { get; set; } } public class Bar { public string Name { get; set; } public string Description { get; set; } } public class FooDto { public List<BarDto> Bars { get; set; } } public class BarDto { public string Name { get; set; } } public class MapperProfile : Profile { public MapperProfile() { CreateMap<FooDto, Foo>(); CreateMap<BarDto, Bar>() .ForMember(dest => dest.Description, opt => opt.UseDestinationValue()); } } If

问题 I am using the SortableObservableCollection described here. Now I'd like to manipulate it from a UI or a non-UI thread so I tried the solution described here: using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Linq; using System.Runtime; using System.Windows.Data; public class SortableObservableCollection<T> : ObservableCollection<T> { private object _itemsLock = new object(); public SortableObservableCollection() : base() { BindingOperations

问题 I know this is a bit vague, but I'm not being able to pinpoint the issue. When I run the a bit of code against a local database it runs fine. When I use a remote database I get an error. It occurs midway of the program execution. The DBup upgrade runs, and then a manual query fails with this exception: System.Data.SqlClient.SqlException (0x80131904): Resetting the connection results in a different state than the initial login. The login fails. Login failed for user 'sa'. I'm creating

问题 case1 var numbers = new List<int>(); numbers.Add (1); IEnumerable<int> query = numbers.Select (n => n * 10); // Build query numbers.Add (2); //Use or execute query case2 var numbers = new List<int>() { 1, 2 }; numbers.Add(4); List<int> query = numbers .Select (n => n * 10) .ToList(); // Executes immediately into a List<int> numbers.Add(3); numbers.Clear(); //Use or execute query Why in the first case query contains both 1,2 In second case query contains only 1,2,4 but not 3,is it because we

问题 I have to execute a sql string in .net core so first I added a Dbquery type entity in dbcontext. internal DbQuery<TempData> MyDataList{ get; set; } Then I fetched the data with my sql string as var data = context.MyDataList.FromSql(dataqueryString).ToList(); Iam getting the data correct but need to implement PagedList on this without fetching the whole data from database. I have tried like var data = context.MyDataList.FromSql(dataqueryString).ToPagedList(1,10) But this will fetch whole data

问题 This question already has answers here : XPath - Get node with no child of specific type (5 answers) Closed 6 years ago . <item id=1> <name>item1</name> <price>30</price> </item> <item id=2> <name>item2</name> </item> I need an xpath to select only items that DO NOT have price for .net. 回答1: For your original question: item[price] will give you all item elements that have a price element child. This includes an empty <price/> so if you want to avoid matching <item> <name>item3</name> <price><

问题 I have a distorted image on which I use Cv2.Undistort() which straightens it out. After this I find some points in the image. I need to get the location of those points in the distorted image. I have tried Cv2.ProjectPoints() but failed to get appropriate coordinates. They were outside the bounds of the image. This is how I went about doing this: List<float> arr = new List<float>(); foreach (var i in points) { arr.Add(i.X); arr.Add(i.Y); arr.Add(0); } Mat pointArr = new Mat(3, points.Count,

问题 I have 16 tasks doing the same job, each of them return an array. I want to combine the results in pairs and do same job until I have only one task. I don't know what is the best way to do this. public static IComparatorNetwork[] Prune(IComparatorNetwork[] nets, int numTasks) { var tasks = new Task[numTasks]; var netsPerTask = nets.Length/numTasks; var start = 0; var concurrentSet = new ConcurrentBag<IComparatorNetwork>(); for(var i = 0; i < numTasks; i++) { IComparatorNetwork[] taskNets; if

问题 I've created an email notification console application using mailkit's idleClient sample code (https://github.com/jstedfast/MailKit/tree/master/samples/ImapIdle). The purpose of this application is to fetch all new emails and trigger web api's based on the content of the email. It works fine as a console application. But when I converted it into a windows service using Topshelf and hosted it in a server environment, the protocol logger is not able to write anything to the logs and the onCount