JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value

I am new to Spring Data REST project and I am trying to create my first RESTful service. The task is simple, but I am stuck. I want to perform CRUD operations on a user data stored in an embedded dat...

Asp.net Core 2 API POST Objects are NULL?

I have a .net Core 2 API setup with some test function. (Visual Studio 2017) Using postman I do a post with the raw data to that method, but the model is just blank? Why? ``` // POST api/Product/tes...

24 Aug at 13:6

ASP.Net Core 1 Logging Error - The description for Event ID xxxx from source Application cannot be found

I would like to write to the Windows Event Log from an ASP.Net Core application's Controller method. The issue I have is that, where I expect log information to be written I keep getting the error/in...

31 Aug at 09:24

LocalDB is not supported on this Platform

I'm trying to launch `.Net Core 2.0` application on `Ubuntu 17.04`. I developed it on Windows 10 before and it works well. The problem is that when I run `dotnet ef database update` I get the next exc...

Exclude certain column from Entity Framework select statment

I have an image column in the product table in a SQL Server database. The image column is used to save the images as bytes. I know it is better to make a separate table for images, but I did not do t...

24 Aug at 10:19

Customize JSON property name for options in ASP.NET Core

I want to use different property names for configuration, when loading the configuration from a JSON file. ``` public class MinioConfiguration { [DataMember(Name = "MINIO_ENDPOINT")] public s...

24 Aug at 08:6

How can I use an ES6 import in Node.js?

I'm trying to get the hang of ES6 imports in Node.js and am trying to use the syntax provided in this example: ### Cheatsheet Link I'm looking through [the support table](http://node.green/), but I...

12 Oct at 19:39

Set color for each vertex in a triangle

I want to set each three vertex of a triangle from a mesh red, blue and green. As seen in the first part [this](https://codea.io/talk/discussion/3170/render-a-mesh-as-wireframe) tutorial which is for...

24 Aug at 06:5

Visual Studio Help - The "RunCommand" property is not defined

I'm using Microsoft Visual Studio Community 2017. I have created a project with multiple classes to be compiled. The primary class I want the application to run first has `public static void Main(stri...

24 Aug at 03:16

Configuration for console apps .net Core 2.0

In .net Core 1 we could do this: ``` IConfiguration config = new ConfigurationBuilder() .AddJsonFile("appsettings.json", true, true) .Build(); ``` And that gave use...

6 Sep at 16:59

Call an action from within another action

I have the following setup for my actions: ``` get1: ({commit}) => { //things this.get2(); //this is my question! }, get2: ({commit}) => { //things }, ``` I want to be able to call one action f...

5 Oct at 11:53

Newtonsoft.Json.JsonSerializationException (Error getting value from 'Value' on 'System.Data.SqlTypes.SqlDouble) serializing SqlGeography

I tried to serialize a `DataTable` object to Json using Newtonsoft.Json version 'Newtonsoft.Json.10.0.3' in a database SQL server 2012. The table has a column with type 'geography', which contains ...

How to delete all columns in DataFrame except certain ones?

Let's say I have a DataFrame that looks like this: ``` a b c d e f g 1 2 3 4 5 6 7 4 3 7 1 6 9 4 8 9 0 2 4 2 1 ``` How would I go about deleting every column besides `a` a...

23 Aug at 17:40

Usage of Var Pattern in C# 7

I've seen this example of var pattern in the new C# 7 ``` if (o is var x) Console.WriteLine($"it's a var pattern with the type {x?.GetType()?.Name}"); ``` What is the different of just use: ``` va...

23 Aug at 16:4

Meaning of "The server returned an invalid or unrecognized response" in HttpClient

When awaiting an `HttpClient.PostAsync` response, I sometimes see an error stating : ``` System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHtt...

23 Aug at 15:22

ServiceStack + .NET Core + Kestrel = Swagger (OpenAPI) not working

I am trying to create a ServiceStack REST API project. So far I have everything working except Swagger (OpenAPI). When I load the Swagger UI it shows no APIs and I can see from the /openapi endpoint...

23 Aug at 15:59

Custom IExceptionHandler

I'm trying to get a custom `IExceptionHandler` to work with my Azure Function (C# class library). The idea is to have my own exception handler for unexpected exceptions that will contain my own in-mem...

IDbCommand missing ExecuteReaderAsync

I'm using .NET Core 2.0. I've got the following function that calls `IDbCommand.ExecuteReader` ``` public async Task<IEnumerable<Widget>> ReadAllAsync( System.Data.IDbConnection databaseConnectio...

Display a readonly field in ASP.NET Core

I am new in ASP.NET Core and would like to ask about displaying a field in w a view. I have a ``` class Person { public string Name {get; set;} public string Nickname {get; set;} } ``` ...

How to check for the previous path searched on a maze C#

I am trying to code an algorithm that solves a maze problem but I am facing some difficulty to apply it correctly. The algorithm runs over the walls instead of changing the direction after finding t...

25 Aug at 07:54

Can't inherit from IdentityUser and IdentityRole in ASP.NET Core 2.0

I'm trying to finish updating to .NET Core 2.0 but a couple of errors pop up: I have two classes, ApplicationRole and ApplicationUser which inherit some properties from IdentityRole and IdentityUse...

23 Aug at 04:46

How to redirect to a asp.net core razor page (no routes)

Here I have a razor cs page: ``` public IActionResult OnPost(){ if (!ModelState.IsValid) { return Page(); } return RedirectToPage('Pages/index.cshtml'); } ``` And a cshtml page: ``` ...

17 Oct at 22:15

Can Dapper create a model class from DB tables?

I'm looking over some alternatives to EF, and Dapper seems like a pretty good option. But I do have one question. I understand that Dapper, being a Micro ORM doesn't rely on or use a class of models, ...

6 May at 20:44

How to add a filter to a page in serenity?

I'm trying to make a filter for a page in serenity. I have a page called Companies, and one button to open another page, CompanyUsers, users from this company. [](https://i.stack.imgur.com/ZquUS.png) ...

20 Jun at 09:12

asp.net-core2.0 user auto logoff after 20-30 min

Few days ago I have decided to upgrade my web app from asp.net core 1.1 to core 2.0. Everything seems to work fine after minor changes, except authentication does not persist longer than 20-30 minutes...