Entity Framework Core add unique constraint code-first

I can't find way to add a unique constraint to my field with using attribute: ``` public class User { [Required] public int Id { get; set; } [Required] // [Index("IX_FirstAndSecond",...

DTO vs. Domain Model, project organization

I have a project with a repository, a service layer, using EF6 and code-first POCOs. In the CustomerRepository, I am doing several projection queries that return objects. I understand that the code-fi...

ServiceStack DateTime Handling

I am having a problem with the DateTime format that is being utilized by ServiceStack. For example I have a simple request object like this. ``` public class GetAllUpdatedStudents : IReturn<GetAll...

20 Dec at 14:27

Simple Injector: Register ILogger<T> by using ILoggerFactory.CreateLogger<T>()

I'm working with a project which utilizes Simple Injector as dependency injector. On the other hand, this project uses Microsoft.Extensions.Logging in order to log the events that occurs in certain cl...

Visual Studio 2015 generate UML from code

- - I have a almost finished project and now I need to write a documentation. I found some information in the www which tells to "simply" generate UML from the existing code. At the top Menu is a ...

Outlook SMTPClient server error 5.3.4 5.2.0

I have an MVC .NET web application that has been running stable for the most part of a year now. However today we received an error code and I'm having trouble finding how to resolve the issue. In t...

4 Jun at 18:23

MVC4: After server restart, cannot post ajax internal server error 500

I am building an MVC application. It behaves so weird. If I run it on my development server (visual studio debugging) it runs fine even when I restart my application several times by changing the web....

React Child Component Not Updating After Parent State Change

I'm attempting to make a nice ApiWrapper component to populate data in various child components. From everything I've read, this should work: [https://jsfiddle.net/vinniejames/m1mesp6z/1/](https://jsf...

20 Dec at 01:10

Cloning specific branch

I am new to git version control and I dont know how to clone / pull a specific branch of a repo . Trying to get the branch `master` of the project, but it defaults to branch `test_1` I have tried usi...

20 Dec at 01:0

Update entity class in ASP.NET Core Entity Framework

I have created the model from existing database using Entity Framework in ASP.NET Core. Here is the model of the `Market` table ``` public partial class Market { public Guid MarketId { get...

How to comment code in a vue.js file?

I have the need to insert a comment inside a vue.js file for future references, but I don't find how you do this in the docs. I have tried `//`, `/**/`, `{{-- --}}`, and `{# #}`, but none of them see...

19 Dec at 18:38

Asp.Net Identity with 2FA: List of Trusted Browsers

I'm working on a project with Asp.Net MVC 5 and Asp.Net Identity and I'm using two factor authentication. For the login I use: `var result = await SignInManager.TwoFactorSignInAsync(model.Provider, mo...

Can ServiceStack OrmLite set a a property with a non-public setter?

Is there any way to make ServiceStack OrmLite set a property when its setter is not public? This would be very useful for keeping the class safer to use in some cases, e.g. when there are 2 dependent ...

19 Dec at 16:46

ServiceStack.OrmLite fails if condition has subquery

I'm using `ServiceStack.OrmLite` v4.0.62 because of .NET Framework 4.0. I need to perform search functionality. As my POCO classes have deep hierarchy, I need to use LINQ queries with nested subquerie...

19 Dec at 13:57

Observable.Generate with TimeSpan selector appears to leak memory [When using a TimeSpan > 15ms]

I am investigating the use of Observable.Generate to create a sequence of results sampled at intervals using the examples from the msdn website as a starting point. The following code WITHOUT a TimeS...

20 Dec at 14:18

Corrupted string in C#

I came across [“CorruptedString” (Solution)](http://problembook.net/content/en/Strings/CorruptedString-S.html). Here is following code of program from the book: ``` var s = "Hello"; string.Intern(s);...

19 Dec at 18:45

How to import js-modules into TypeScript file?

I have a Protractor project which contains such a file: ``` var FriendCard = function (card) { var webElement = card; var menuButton; var serialNumber; this.getAsWebElement = function...

Cast null value to a type

If we cast some null variable to a type, I expect the compiler to throw some exception, but it doesn't. Why? I mean ``` string sample1 = null as string; string sample2 = (string)null; object t1 = nu...

is not a recognized built-in function name

Created a function ``` CREATE FUNCTION Split_On_Upper_Case(@Temp VARCHAR(1000)) RETURNS VARCHAR(1000) AS BEGIN DECLARE @KeepValues AS VARCHAR(50) SET @KeepValues='%[^ ][A-Z]%' WHILE PATINDEX(@KeepVa...

Get index of a row of a pandas dataframe as an integer

Assume an easy dataframe, for example ``` A B 0 1 0.810743 1 2 0.595866 2 3 0.154888 3 4 0.472721 4 5 0.894525 5 6 0.978174 6 7 0.859449 7 8 0.541247 8 9 0.232302 9...

20 Jun at 21:15

What is the time complexity of Linq OrderBy().ThenBy() method sequence?

I am using Linq and Lambda Operations in my projects and I needed to sort a List according to two properties of a class. Therefore, I used OrderBy().ThenBy() methods as below: ``` class ValueWithInde...

23 May at 12:2

Composer: file_put_contents(./composer.json): failed to open stream: Permission denied

I'm trying to install [Prestissimo](https://github.com/hirak/prestissimo) to an Ubuntu 16.04 server, but that leads to an error: ``` $ composer global require "hirak/prestissimo:^0.3" Changed current...

18 Dec at 20:6

tsconfig.json: Build:No inputs were found in config file

I have an ASP.NET core project and I'm getting this error when I try to build it: ``` error TS18003: Build:No inputs were found in config file 'Z:/Projects/client/ZV/src/ZV/Scripts/tsconfig.json'. Sp...

Error 415 when posting to ASP.Net Core WebAPI using XMLHttpRequest

Working on a new project using a WebAPI backend server and I am having trouble posting to the controller from an actual website, despite Postman having no issues posting to the controller. I get the a...

How do I safely call an async method from EF's non-async SaveChanges?

I'm using ASP.NET Core, and EF Core which has `SaveChanges` and `SaveChangesAsync`. Before saving to the database, in my `DbContext`, I perform some auditing/logging: ``` public async Task LogAndAud...