entity-framework-core

问题 I'm trying to use EF Core but I need to use the sql server datatype hierarchyid on one of my tables. Is it possible to designate a field in my c# class to be of type hierarchyid? Could I manually column EF creates to be type hierarchyid without breaking EF? Edit: I have tried to do this: public class Entity { public int Id { get; set; } public string Name { get; set; } public SqlHierarchyId HierarchyId { get; set; } } As it's suggested that this is supported by EF core 2.1, however when i run

问题 I'm using XUNIT to test in a dot net core application. I need to test a service that is internally making an async query on a DbSet in my datacontext. I've seen here that mocking that DbSet asynchronously is possible. The problem I'm having is that the IDbAsyncQueryProvider does not seem to be available in EntityframeworkCore, which I'm using. Am I incorrect here? Has anyone else got this working? (Been a long day, hopefully I'm just missing something simple) EDIT After asking on GitHub, I

问题 I have a table I'm displaying in a site which is pulling data from a few different SQL tables. For reference, I'm following this guide to set up a sortable table. Simplify the model, say I have a main class called "Data" which looks like this (while the Quotes class stores the DataID): namespace MyProject.Models { public class Data { public int Id { get; set; } public string Name { get; set; } public int LocationId { get; set; } public Models.Location Location { get; set; } public IList

问题 I'm trying to use Entity Framework Core with UWP. I found this sample from Microsoft and got it to work. In this sample, the object models are in a .Net Standard class library. However, for the project I'm working on, I need to be able to use MVVM Light's RaisePropertyChanged method in the setters of my object models. The issue I'm running into is that MVVM Light is apparently not compatible with .NET Standard 2.0, only 1.0. MVVM Light does seem to install correctly to the class library, but

问题 I'm trying to use Entity Framework Core with UWP. I found this sample from Microsoft and got it to work. In this sample, the object models are in a .Net Standard class library. However, for the project I'm working on, I need to be able to use MVVM Light's RaisePropertyChanged method in the setters of my object models. The issue I'm running into is that MVVM Light is apparently not compatible with .NET Standard 2.0, only 1.0. MVVM Light does seem to install correctly to the class library, but

问题 I'm trying to use Entity Framework Core with UWP. I found this sample from Microsoft and got it to work. In this sample, the object models are in a .Net Standard class library. However, for the project I'm working on, I need to be able to use MVVM Light's RaisePropertyChanged method in the setters of my object models. The issue I'm running into is that MVVM Light is apparently not compatible with .NET Standard 2.0, only 1.0. MVVM Light does seem to install correctly to the class library, but

问题 How do I update the database for production? I've moved the connection string secrets out of the application. Our CI/CD pipeline handles the token replacement within the connection string "template" that remains in the appsettings, and developers won't have production database access. I had expected to use automatic migrations, only to discover today that Microsoft eliminated that for EF Core. Will I have to, every time, temporarily overwrite the connection string that normally specifies my

问题 How do I update the database for production? I've moved the connection string secrets out of the application. Our CI/CD pipeline handles the token replacement within the connection string "template" that remains in the appsettings, and developers won't have production database access. I had expected to use automatic migrations, only to discover today that Microsoft eliminated that for EF Core. Will I have to, every time, temporarily overwrite the connection string that normally specifies my

问题 Earlier, add migrations was not working for me since the migration and dbcontext were in different assemblies. After I move both of them inside the same assembly, that error doesn't occur anymore, instead, I am getting this new error. Since there is not much information other than the stack trace, I am unable to find where the problem is. Command: dotnet-ef migrations add identity Stack trace: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft

问题 I am trying to do an update-database in the Package Manager Console with multiple connection strings that are stored in a list of strings called lDataBaseConnection It works fine if I specify which index in my list of strings and simply run the update-database in the Package Manager Console. protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseNpgsql(this.lDataBaseConnection[0]); } But if I use a loop, instead of updating all the databases... I