EF Core - may cause cycles or multiple cascade paths

I've set up what I thought was a pretty simple database.. However I am getting the following error. > Introducing FOREIGN KEY constraint 'FK_User_Suburb_SuburbId' on table 'User' may cause cycles or ...

3 May at 13:18

Apply Entity Framework migrations when using ASP.Net Core in a Docker image

I have an ASP.Net Core application which uses Entity Framework with Sqlite. I am building a Docker image to deploy this. The ASP.Net Core application runs fine when debugging with VS Code, but when r...

how to use multiple folder into app.UseStaticFiles in .net core?

I want to get access to multiple folder locations from my web api to display image. I can't change the folder locations (depending on devices on which I don't have right to modify anything). for one ...

2 May at 15:45

Detect source language at runtime from within debugging visualizer

I am writing a [debugging visualizer for Visual Studio](https://github.com/zspitz/ExpressionToString#visual-studio-debugger-visualizer-for-expression-trees) that renders expression trees into C# or VB...

ServiceStack doesn't populate the response DTO when throwing HttpErrors

ServiceStack doesn't populate the original response in the WebServiceException's responseDTO property. I'm running the code below which should always return a 404 response code with the ResponseStatu...

2 May at 12:59

Mock IOptionsMonitor

How can I make an class instance manually of a class that requires an IOptionsMonitor in the constructor? ``` private readonly AuthenticationSettings _authenticationSettings; public ActiveDirector...

Casting private key to RSACryptoServiceProvider not working

I have a X509Certificate2 variable and I'm trying to cast the private key of the variable to a RSACryptoServiceProvider However I get this exception. > System.InvalidCastException: 'Unable to cast obj...

6 May at 20:34

Catch exception not of a type

Is there a difference when catching exceptions not of a type between : ``` try { ... } catch (TaskCanceledException) { throw; } catch (Exception exception) { ... } ``` and : ``` try { ...

2 May at 07:39

Flutter Text Field: How to add Icon inside the border

![The Search Bar to Replicate](https://i.stack.imgur.com/TfQ2u.jpg) I would like to add the icon in the search bar. Here is my code so far: ``` new TextField( decoration: new InputDecoration( ...

24 Oct at 15:52

Django TemplateSyntaxError - 'staticfiles' is not a registered tag library

After upgrading to Django 3.0, I get the following `TemplateSyntaxError`: ``` In template /Users/alasdair//myproject/myapp/templates/index.html, error at line 1 'staticfiles' is not a registered tag ...

Insecure deserialization using Json.NET

A static security scanner has flagged my C# code on this line: ``` var result = JsonConvert.DeserializeObject<dynamic>(response); ``` `response` will contain a JSON response from a web API. The sc...

30 Apr at 16:3

JSON format issues with JSON_QUERY and C#

I have a JSON blob column (eg Groups) in a user table that contains a json object as follows: ``` {Security:[1,5],Reporting:[2,8]} ``` If i try and query that table using JSON_QUERY I get a badly f...

30 Apr at 15:21

Why am I able to edit a LINQ list while iterating over it?

I recently came across an issue where I was able to change the `IEnumerable` object that I was iterating over in a `foreach` loop. It's my understanding that in C#, you aren't supposed to be able to e...

30 Apr at 15:22

How to lock autofocus

Is there a way to prevent auto-focus from focusing, using any of the "standard" libraries, such as OpenCV, EmGU, DirectShow, etc? I want auto-focus to find the optimal focus, then during video captur...

9 May at 07:28

xUnit test using data coming from external file

In these days I'm trying to understand how xUnit tests work and, in particular, I discovered that there are 3 ways to pass data as parameters in order to test class methods (InlineData, ClassData and ...

30 Apr at 14:38

How to fix "ReferenceError: primordials is not defined" in Node.js

I have installed Node.js modules by 'npm install', and then I tried to do `gulp sass-watch` in a command prompt. After that, I got the below response. ``` [18:18:32] Requiring external module babel-re...

14 May at 12:6

Disable "Try It Out" in Swagger

This question has been asked a lot for different languages. After a substantial amount of (fruitless) browsing Im feeling rather dumb but, I'll ask anyway This document refers to adding a Swagger plu...

30 Apr at 05:45

Temporary Value Error During Entity Framework Core Modify

I was following along in a tutorial for ASP.NET Core and Entity Framework Core. I am able to connect to my Microsoft SQL Server database and get and add rows, but I cannot update them. My update metho...

String.Format() doesn't work, but string.Format() does

I would not believe this if I wasn't seeing it with my own eyes. ``` string test = String.Format( "{0} test {1}", "Mark", 13 ); ``` Results in a value of `"{0} test {1}"` for variable `test` ``` s...

29 Apr at 19:54

How do I decode the response stream correctly in ServiceStack ProxyFeature?

I am trying to replace URLs in the body of a response in ProxyFeature, but I am getting an encoded body. Here is the code: ``` Plugins.Add(new ProxyFeature( matchingRequests: req => ...

29 Apr at 21:23

update dart sdk for flutter

I would like to use dart SDK >= 2.2.0 with flutter. But my current version used BY Flutter is 2.1.2 ``` flutter --version Flutter 1.2.1 • channel stable • https://github.com/flutter/flutter.git Frame...

29 Apr at 06:41

What is the incentive for curl to release the library for free?

I recently started using libCurl for my VC++ project. I've been wondering: what is the incentive for the curl creators to release the entire library for free? Is it purely to help their fellow develo...

28 Apr at 19:30

Vue Axios CORS policy: No 'Access-Control-Allow-Origin'

I build an app use vue and codeigniter, but I have a problem when I try to get api, I got this error on console ``` Access to XMLHttpRequest at 'http://localhost:8888/project/login' from origin 'htt...

27 Apr at 19:11

Entity Framework Core: `SqlNullValueException: Data is Null.` How to troubleshoot?

I am using Entity Framework Core in an ASP.NET Core application and Controller action and I haven't changed something to the working code nor to the database but I can't tell what is the query perform...

ConfigurationErrorsException is found in both ServiceStack and System.Configuration.ConfigurationManger assemblies (netstandard)

I use both the ServiceStack and System.Configuration.ConfigurationManager package in my .NET Standard library. I reference the `ConfigurationErrorsException` class specifically. My Visual Studio doesn...

29 Apr at 15:35