All Questions
Tagged with .net-core asp.net-core-webapi
1,462
questions
229
votes
6
answers
347k
views
Return file in ASP.Net Core Web API
Problem
I want to return a file in my ASP.Net Web API Controller, but all my approaches return the HttpResponseMessage as JSON.
Code so far
public async Task<HttpResponseMessage> ...
- 2,675
113
votes
16
answers
198k
views
The configuration file 'appsettings.json' was not found and is not optional
The Azure error is:
.Net Core: Application startup exception:
System.IO.FileNotFoundException: The configuration file
'appsettings.json' was not found and is not optional.
So this is a bit ...
- 1,341
102
votes
6
answers
90k
views
Unit testing controller methods which return IActionResult
I'm in the process of building an ASP.NET Core WebAPI and I'm attempting to write unit tests for the controllers. Most examples I've found are from the older WebAPI/WebAPI2 platforms and don't seem ...
- 3,445
70
votes
13
answers
72k
views
Enable OPTIONS header for CORS on .NET Core Web API
I solved this problem after not finding the solution on Stackoverflow, so I am sharing my problem here and the solution in an answer.
After enabling a cross domain policy in my .NET Core Web Api ...
- 3,273
67
votes
7
answers
160k
views
How do I resolve the issue the request matched multiple endpoints in .Net Core Web Api
I notice that there are a bunch of similar questions out there about this topic.
I'm getting this error when calling any of the methods below.
Microsoft.AspNetCore.Routing.Matching....
- 1,479
57
votes
5
answers
137k
views
How to compile .NET Core app for Linux on a Windows machine
I'm developing a .NET Core app on a Windows 10 machine (with Visual Studio 2015 update 3 + Microsoft .NET Core 1.0.1 VS 2015 Tooling Preview 2) which should published on an Ubuntu 16 machine. To do ...
- 27.3k
50
votes
17
answers
77k
views
ASP.NET CORE, Web API: No route matches the supplied values
PLEASE NOTE: This question was asked in 2016. The original answer to this problem was to update the microsoft api versiong package. In the current days, the problem reoccurs, but for other reasons.
...
- 1,626
50
votes
4
answers
60k
views
Correct way to return HttpResponseMessage as IActionResult in .Net Core 2.2
In .Net Core 2.2. I am creating a API Controller that routes the request to another Http endpoint based on payload.
[Route("api/v1")]
public class RoutesController : Controller
{
...
- 32.3k
44
votes
2
answers
82k
views
.NET Core RuntimeIdentifier vs TargetFramework
Can someone explain the purpose of these two in the csproj file (VS2017):
<TargetFramework>netstandard1.6</TargetFramework>
<RuntimeIdentifier>win7</RuntimeIdentifier>
I just ...
- 2,719
39
votes
1
answer
42k
views
Using Dependency Injection with .NET Core Class Library (.NET Standard)
I have gone through the link:
https://learn.microsoft.com/en-us/aspnet/core/mvc/controllers/dependency-injection
and learnt that how I can use dependency injection for Web API.
As mentioned in ...
- 3,819
38
votes
4
answers
23k
views
How can I get my .NET Core 3 single file app to find the appsettings.json file?
How should a single-file .Net Core 3.0 Web API application be configured to look for the appsettings.json file that is in the same directory that the single-file application is built to?
After ...
- 941
31
votes
3
answers
79k
views
Routes in ASP.net Core API
I read lot of topic about routes for API in Asp.net core but I cannot make it work.
First, this is my controller :
Public class BXLogsController : Controller
{
//[HttpGet("api/[controller]/ID/{...
- 473
29
votes
11
answers
29k
views
The application completed without reading the entire request body, .net core 2.1.1
I have created a user register controller to register users with repository design pattern. My controller looks like this.
[Route("api/[controller]")]
public class AuthController : Controller
...
- 4,092
29
votes
3
answers
15k
views
Localization in external class libraries in ASP.NET Core
I have two projects:
MyWebApp - ASP.NET Core Web API
MyServices - .NET Core class library,
which contains helpful services for project above
How can I add localization with IStringLocalizer to ...
- 5,563
28
votes
2
answers
44k
views
Using ApiControllerAttribute without using RouteAttribute
In ASP.NET Core (v 2.1.5) you can create controllers without having them inherit from Controller class (as you know). And if you do, you have to use RouteAttribute to define your routes. But, I'm ...
- 27.3k
26
votes
1
answer
16k
views
How does reloadOnChange of Microsoft.Extensions.Configuration work for appsettings.json
In two projects (a .NET Core Web API and a .NET Core WindowsService) I am using appsettings.json for the configuration.
var configuration = new ConfigurationBuilder()
.SetBasePath(System.IO....
- 8,265
24
votes
2
answers
60k
views
Bearer error="invalid_token", error_description="The signature is invalid"
I have a angular application that request a token from azure. The login went well and I get a token. This token is now send from the angular app to a net core webapi application. Net core should ...
- 7,013
23
votes
2
answers
15k
views
WebAPI Core routing issues
So, I am playing around with Web API (ASP.NET Core 2) and having routing issues.
I have several controllers such as:
SchoolController
TeacherController.
Both have Gets: Get(int id)
Problem is that ...
- 5,772
23
votes
2
answers
15k
views
Keep ASP.NET core app running all the time in IIS
I am hosting an ASP.NET Core (2.2) app in IIS.
The app is using a custom app pool with below settings:
.NET CLR version: No Managed Code
Start Mode: Always Running
Idle Time-out (minutes): 0
My ...
- 12.3k
22
votes
3
answers
41k
views
How to do model validation in every method in ASP.NET Core Web API?
I am getting into ASP.NET Core 2.0 with Web API. One of my first methods are my login:
/// <summary>
/// API endpoint to login a user
/// </summary>
/// <param name="data">...
- 14.8k
21
votes
1
answer
25k
views
Post Stream in ASP.NET Core Web Api
Hello lovely people of Stack Overflow.
Since yesterday I have a problem and I have been browsing SO since then.
I have a UWP Client and ASP.NET Core Web Api. I just want to send a stream to my web api ...
- 1,139
21
votes
4
answers
18k
views
SwaggerUI not display enum summary description, C# .net core?
I used https://learn.microsoft.com/en-us/aspnet/core/tutorials/getting-started-with-swashbuckle?view=aspnetcore-2.1&tabs=visual-studio#xml-comments to show my classes summaries description in ...
- 22.1k
19
votes
3
answers
16k
views
How to validate AWS Cognito JWT in .NET Core Web API using .AddJwtBearer()
I was having some trouble figuring out how to go about validating a JWT given to the client by AWS Cognito inside my .NET Core Web API.
Not only could I not figure out what the variables for ...
- 3,825
19
votes
6
answers
36k
views
Version Conflict detected for Microsoft.EntityFrameworkCore.Install
I am getting the following error when adding an asp.net core api to an existing project I am working on.
"Version Conflict detected for Microsoft.EntityFrameworkCore.Install/reference Microsoft....
- 789
18
votes
1
answer
16k
views
ASP.NET Core CreatedAtRoute No route matches the supplied values
Using ASP.NET Core 2.0.0 Web API, I'm trying to build a controller to do a database insert. The information can be inserted into the database just fine, but returning a CreatedAtRoute throws an '...
- 517
18
votes
2
answers
21k
views
Reading appsettings.json from .net standard library
i have started a new RESTful project using .NET Core Framework.
I divided my solution in two parts: Framework (set of .NET standard libraries) and Web (RESTful project).
With Framework folder i ...
- 595
16
votes
1
answer
16k
views
Return type of a file for Swagger documentation with dotnet core
I'm using Swagger for dotnet core to document my dotnet core Web API.
I've read the documentation telling me that I need to add
[ProducesResponseType(typeof(XXXXX),200)] above the controller ...
- 8,818
16
votes
3
answers
13k
views
How can I add kid to jwt header using SecurityTokenDescriptor in .netcore
I am using .netcore 2 with JwtSecurityToken to generate a token
var jwtSecurityToken = new JwtSecurityToken(
issuer: issuer,
audience:issuer,
...
- 602
15
votes
2
answers
17k
views
.Net Core ValidateAntiForgeryToken throwing web api 400 error
Visual Studio 2017 with Web Api using .net Core 1.1 I'm using, but I am getting a 400 Bad Request Error.
Error Occurs in every way:
Angular http
Fiddler
Postman
SoapUI
Swagger
ASP.NET Web API “...
user8545750
15
votes
3
answers
13k
views
How to setup an auto watch run for .NET Core 3.1 projects using Visual Studio Code?
I need to setup an auto restart when some source code file modifies.
I'm using VS Code with Dotnet Core 3.1 to develop a web api.
When debug starts I can see my REST Api published in http://...
- 151
13
votes
2
answers
4k
views
Jwt Bearer and dependency injection
I am trying to configure my Jwt Bearer issuer key but, in production usually, I use Azure Key Vault wrapped by a KeyManager.
The KeyManager class is configured in Dependency Injection but, in ...
- 375
13
votes
6
answers
26k
views
Post Multiple Parameters Without DTO Class
I have an action on my web project which calls to an API
[HttpPost]
public async Task<IActionResult> ExpireSurvey(int id)
{
var token = await HttpContext.GetTokenAsync("...
- 1,327
13
votes
2
answers
14k
views
Handling Model Binding Errors when using [FromBody] in .NET Core 2.1
I am trying to understand how I can intercept and handle model binding errors in .net core.
I want to do this:
// POST api/values
[HttpPost]
public void Post([FromBody] Thing value)
...
- 730
13
votes
5
answers
34k
views
How to set AWS credentials with .net Core
I have to debug an existing project about .net Core and AWS.
Our project runs well on our AWS instance but we can't run the project in local.
Firstly we got the AmazonServiceException: Unable to find ...
- 151
13
votes
4
answers
16k
views
Why does the configuration of .NET Core options not work with a generic type parameter?
I have a .NET Core WebApi project. To read the appsettings in an easy way, I configure the options to be injected with DI. This works fine. However if I try to call Configure<>() with a generic ...
- 1,447
12
votes
2
answers
8k
views
.NET Core JWTBearer skip self-signed certificate validation for local communication with identity server
I have two API projects, one that's based on the .NET Framework 4.6.2 (an old API) and one that's based on .NET Core 2.0. The old API can disable self-signed certificate validation quite simply:
...
- 3,301
12
votes
6
answers
28k
views
passing an array to a asp net core web api action method HttpGet
I am trying to send an array of integers to my action method the code looks like so:
[HttpGet]
public async Task<IActionResult> ServicesByCategoryIds([FromQuery] int[] ids)
{
...
- 125
12
votes
2
answers
3k
views
ASP.NET Core 5 returning JSON adding $id and $values properties
I'm using ASP.NET Core 5. As below, I'm using System.Text.Json:
public IActionResult Index()
{
var result = GetAllMenuItems();
return Ok(result);
}
The expected shape of my JSON is:
[
{
...
- 1,018
12
votes
2
answers
18k
views
Is services.AddSingleton<IConfiguration> really needed in .net core 2 API
I accessed appsettings.json In .NET Core 2 Web API Controller simply by adding below:
public class MyController : Controller
{
private readonly IConfiguration appConfig;
public ...
- 2,645
12
votes
1
answer
7k
views
add google authentication to **Existing** .net core 2 web api project
TL;DR - how to add authentication to an existing default core 2 web api project that was started without auth.
Details -
I've got an existing .net core 2 web api project with no authentication ...
- 2,335
12
votes
5
answers
10k
views
Alternative to Server.Transfer in ASP.NET Core
I am migrating an ASP.NET application to ASP.NET Core and they have some calls to HttpServerUtility.Transfer(string path). However, HttpServerUtility does not exist in ASP.NET Core.
Is there an ...
- 680
12
votes
1
answer
3k
views
Dotnet core + (plus) sign in Web API routing
I work on web API project in the dotnet core and check user mobile number exists check.
[Route("api/[controller]")]
public class UserController : Controller
{
[HttpGet]
[Route("mobile/exist/{...
- 6,760
12
votes
5
answers
7k
views
How to remove WebDav in Startup.cs ASP.NET Core
I published a .NET Core Web API through FTP.
By default, some of the methods weren't working(put and delete), because the server has WebDAV enabled as default.
To remove this, after publishing the ...
- 590
12
votes
3
answers
4k
views
Visual Studio keeps adding IIS Express back into my launchsettings.json
I am trying to remove the IIS Express profile from my .NET Core launch settings but every time i repoen the solution, Visual Studio adds it back in again. For example, in a new project my launch ...
- 12.9k
11
votes
4
answers
10k
views
DataMember Attribute is not honored in dotnet core 3.0
I created a sample dotnet core 3.0 Web API project and did the following changes,
Create a Model class TestData
using System.Runtime.Serialization;
namespace WebApplication17.Models
{
[...
- 762
11
votes
1
answer
12k
views
Populating AspNetUserLogins and AspNetUserTokens
I've tried quite a few examples from the internet (e.g. first, second and others) and everything works fine except the fact that tables AspNetUserLogins and AspNetUserTokens don't show any data after ...
- 645
11
votes
2
answers
41k
views
How to add bearer token authentication to typed HttpClient in Asp.Net Core 6
I'm trying to setup a web api using ASP.Net Core 6 so that users can hit my end points and then I do some work in D365 behind the scenes using a privileged account. I'm using a typed HTTP Client, but ...
- 381
11
votes
3
answers
23k
views
asp.net core 2 Web API timeout issue
I have a .net core web api and one of the end point runs a stored procedure that takes 3-4 minutes to complete. API is deployed to IIS.
When I make a httpGet , I get 502 Bad Gateway error. Looking ...
- 2,590
11
votes
2
answers
27k
views
System.InvalidOperationException: Unable to resolve service for type [duplicate]
I'm working on a Web API with ASP.NET Core. When I'm executing my API with a post request, an exception is throwing before my break point in the Post method of UnitController.
Exception
Request ...
- 1,961
10
votes
2
answers
14k
views
Logging Polly wait and retry policy ASP.NET CORE 2.1
I need to log retry policy defined via Polly in APS.NET CORE 2.1+.
My code is below showing Polly retry polly and using HttpClient.
public IServiceProvider ConfigureServices(IServiceCollection ...
- 7,859