All Questions
1,884
questions
144
votes
5
answers
68k
views
How to consume a Scoped service from a Singleton?
How should I inject (using .NET Core's built-in dependency injection library, MS.DI) a DbContext instance into a Singleton? In my specific case the singleton is an IHostedService?
What have I tried
I ...
- 75.6k
136
votes
5
answers
83k
views
Why does aspnet core start on port 80 from within Docker?
TL;DR: Why does an aspnet core app run on port 80 from within a Docker image, but 5000 outside a docker image.
Elaborate
I went through the aspnet core / docker tutorial found here:
https://learn....
- 5,334
134
votes
3
answers
64k
views
I'm lost. What happened to ASP.NET MVC 5?
I've been keeping my head down working on various projects and apparently Microsoft has been busy making some big changes and it's confusing the hell out of me. ASP.NET Core first came onto my radar ...
- 12.9k
115
votes
12
answers
97k
views
Return View as String in .NET Core
I found some article how to return view to string in ASP.NET, but could not covert any to be able to run it with .NET Core
public static string RenderViewToString(this Controller controller, string ...
- 23.9k
81
votes
7
answers
45k
views
What's the difference between ASP.NET 5, .NET Core, and ASP.NET Core 5? [closed]
I'm confused on the distinction between these terms:
ASP.NET 5 (now renamed ASP.NET Core and released as 1.0, not 5.0)
ASP.NET Core 5
.NET Core
Can anyone briefly explain it?
- 1,150
78
votes
3
answers
100k
views
How to extract custom header value?
I have this exact code from the accepted answer in my project which I need to migrate into ASP.NET Core MVP.
How to extract custom header value in Web API message handler?
var env = Request.Headers....
- 3,859
75
votes
32
answers
105k
views
Unable to start process dotnet.exe
I am attempting to setup a new work space and transfer all of my projects from my old computer to the new one. However, I am getting this error when I try to run IIS Express:
Unable to start ...
- 759
68
votes
1
answer
36k
views
Which web server are you using in production for ASP.NET Core on a *nix server?
With ASP.NET Core now released, I was wondering what the best hosting option is for Linux and Mac environments. Is there any production grade web server under active development?
The only one I'm ...
- 6,420
64
votes
9
answers
108k
views
Receive file and other form data together in ASP.NET Core Web API (boundary based request parsing)
How would you form your parameters for the action method which is supposed to receive one file and one text value from the request?
I tried this
public string Post([FromBody]string name, [FromBody]...
- 7,915
60
votes
5
answers
128k
views
How to get absolute path in ASP.Net Core alternative way for Server.MapPath
How to get absolute path in ASP net core alternative way for Server.MapPath
I have tried to use IHostingEnvironment but it doesn't give proper result.
IHostingEnvironment env = new ...
- 835
58
votes
9
answers
52k
views
ASPNETCORE_ENVIRONMENT in Docker
i have problems setting the ASPNETCORE_ENVIRONMENT variable running my project in a docker container. The problem is that the value is always set/overwritten to "Development".
I have tried ...
- 619
55
votes
7
answers
58k
views
The constraint reference 'string' could not be resolved to a type. (netcoreapp3.0)
I have got an error. This is my Startup class.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app)
{
app....
- 1,946
54
votes
4
answers
102k
views
The current .NET SDK does not support targeting .NET Core 3.0 | 3.1 | 5.0 | 6.0
I've just downloaded the release version of .NET Core 3.0.100
It was installed alongside older version that I have:
When I try to run dotnet restore for a project that targets .NET Core 3 (<...
- 1,009
49
votes
2
answers
49k
views
Where's the NuGet package location in ASP.NET Core?
I'm new to ASP.NET Core, and am trying to figure out where NuGet packages are stored on my local machine.
I've installed the following NuGet packages:
nuget dapper
nuget MicroOrm.Pocos.SqlGenerator
...
- 3,377
48
votes
3
answers
32k
views
What is the difference between UseHttpsRedirection and UseHsts
I don't quite get the difference between UseHsts and UseHttpsRedirection in the configure section of the startup file in .net core. Could anyone explain?
- 521
44
votes
4
answers
33k
views
ASP.NET 5 (vNext) - Getting a Configuration Setting
I'm writing a basic app to learn ASP.NET 5. One area I find very confusing is configuration. Prior to ASP.NET 5, I could do the following:
var settingValue = ConfigurationManager.AppSettings["SomeKey"...
- 1,933
43
votes
2
answers
125k
views
How to set default page asp.net [duplicate]
I've just published my site in my server, but when I type in the browser www.mysite.com I get this error : HTTP Error 403.14 - Forbidden
The Web server is configured to not list the contents of ...
- 453
43
votes
2
answers
24k
views
What is the use of Normalized Email & UserName in .NET core IdentityUser Model?
When I use IdentityUser model in Asp.Net Identity with EntityFramework, it creates some standard fields in the database. All the fields are self explanatory except for the below two fields.
...
- 14.7k
42
votes
3
answers
25k
views
How can I list all of the configuration sources or properties in ASP.NET Core?
I want to ensure that a particular configuration property is being read from a configuration source. I was going to print out all of the configuration sources (or print out all of the configuration ...
- 1,819
42
votes
9
answers
57k
views
Error "dotnet : Could not find any project in `C:\**." when running "dotnet add package Microsoft.AspNetCore.Authentication.MicrosoftAccount"
I have visual studio 2019 and i created a new asp.net core 2.2 project. now i am following these steps Configure Microsoft Account Authentication to enable external login to our web application. but ...
40
votes
3
answers
25k
views
Can I use Entity Framework 6 (not core) in .net core?
Entity Framework Core does not support spatial data, which I need to use in my app.
Can I use Entity Framework 6 in .net core? If so, how can I register DatabaseContext in Startup.cs?
- 669
39
votes
4
answers
37k
views
How to force Visual Studio to re-create the SSL certificate for a .NET Core Web Application running Kestrel?
When a web project is created, Visual Studio automatically generates a SSL certificate and prompts you to install it. Everything works fine.
That certificate has now expired and I cannot figure out ...
- 2,490
38
votes
4
answers
16k
views
Login with ASP Identity fails every time with "Not Allowed" (even when 'email' and 'username' have the same value))
Registering a user works fine, as it logs in via this line:
await _signInManager.SignInAsync(user, isPersistent: model.RememberMe);
But if I want to log in with the same user again does not work (...
user1819747
36
votes
3
answers
30k
views
ASP.NET Core Singleton instance vs Transient instance performance
In ASP.NET Core Dependency Injection, I just wonder if registering Singleton instances will improve performance instead of registering Transient instances or not?
In my thinking, for Singleton ...
- 1,448
35
votes
8
answers
32k
views
Cannot install dotnet-ef tool on Windows 10
I'm trying to install the dotnet-ef tool via the dotnet-cli.
The command that I enter: dotnet tool install --global dotnet-ef
I gives me the following error:
The tool package could not be restored.
...
- 1,163
35
votes
7
answers
23k
views
GZIP in .net core not working
I'm attempting to add Gzip middleware to my ASP.net core app.
I have added the following package :
"Microsoft.AspNetCore.ResponseCompression": "1.0.0"
In my startup.cs for the Configure ...
- 12.2k
33
votes
2
answers
16k
views
How to disable Chunked Transfer Encoding in ASP.Net C# using HttpClient
I'm trying to post some JSON to an external API which keeps failing because my content is chunked. Please can someone tell me how to disable it?
I'm using ASP.NET 5 so think I'm using System.Net.Http,...
- 577
32
votes
1
answer
11k
views
Differences between ASP.NET Web Application (.NET Framework) vs ASP.NET Core Web Application (.NET Framework)
Why should I choose ASP.NET Web Application (.NET Framework) instead of ASP.NET Core Web Application (.NET Framework)?
I'm talking about options 1 and 3 in the options below, what will be the ...
- 3,591
31
votes
2
answers
17k
views
AutoValidateAntiForgeryToken vs. ValidateAntiForgeryToken
I was trying to secure a post method against side scripting just now through providing an anti forgery token but noticed, in .Net Core there is another attribute named as AutoAntiForgeryToken. The XML ...
- 5,036
30
votes
5
answers
19k
views
Dotnet core 2.0 authentication multiple schemas identity cookies and jwt
In dotnet core 1.1 asp, I was able to configure and use identity middleware followed by jwt middleware by doing the following:
app.UseIdentity();
app.UseJwtBearerAuthentication(new ...
- 798
30
votes
2
answers
4k
views
What is the difference between creating a project ASP.NET Core (.NET Core) and ASP.NET Core (.NET Framework)
I don't see clearly the main difference between the last two project types, actually which sense have the last one? .NET Core and .NET Framework?
- 808
29
votes
4
answers
58k
views
How to find ASP.Net Core version?
I'm using WebsitePanel and in Web Sites ==> Extensions tab, the ASP.NET version is 4 integrated pipeline.
My question is that how can I figure out what version of .Net Core is my server using now?
...
- 3,717
29
votes
5
answers
52k
views
Keycloak client for ASP.NET Core
Is there any existing Keycloak client for Asp.net Core? I have found a NuGet package for .net but it doesn't work with Core. Do you have any ideas how to easily integrate with this security server (or ...
- 1,589
29
votes
8
answers
31k
views
How to automatically reload .NET Core project in Visual Studio 2019
I tried to automatically reload ASP.NET Core project as I do using Angular with Node or NPM.
When I change the code of the .NET Core project and save, I want the web page to be automatically refreshed ...
- 1,333
28
votes
3
answers
20k
views
.net Core on Windows vs Linux
ASP.Net Core runs on both Windows and Linux Docker containers. Considering Linux hosts are cheaper than Windows hosts, what is the benefit of running your app on IIS/Windows vs Nginx/Linux if one ...
- 435
27
votes
3
answers
42k
views
How to write custom actionResult in asp.net core
In webApi2 i could write a custom ActionResult by inheriting IHttpActionResult.
Sample :
public class MenivaActionResult : IHttpActionResult
{
private readonly HttpRequestMessage ...
- 1,003
26
votes
8
answers
46k
views
How to remove previous versions of .NET Core from Linux (CentOS 7.1)
I would like to install the current version Core 1.0. Currently the RC2 version is installed. The instruction on the official website are:
Before you start, please remove any previous versions of ....
- 2,244
26
votes
6
answers
12k
views
Get HTTP status code descriptions in ASP.Net Core
In previous versions of ASP.Net, we could retrieve the description of a HTTP status code in a few ways as shown here:
Get description for HTTP status code
Is there something similar to ...
- 16.5k
26
votes
7
answers
18k
views
The referenced project is a non self-contained executable. A non self-contained executable cannot be referenced by a self-contained executable
I'm having an issue regarding trying to compile my .netcore3.1 after updated the SDK to .NET 6.0 preview while debugging through Visual Studio.
My CSProject is bellow :
<Project Sdk="Microsoft....
- 689
26
votes
2
answers
10k
views
Visual Studio 2015 Web Application .NET Core vs .NET Framework
In Visual Studio Enterprise 2015 (v14.0.25123.00 Update 2) when I go to:
Start > New Project
With Target Framework 4.5 or higher selected...
Under:
Installed
|
|--> Visual C#
|
...
- 527
25
votes
5
answers
17k
views
HTTP Error 500.19 with Error Code 0x8007000d visual studio 2017 while deploying .net core application
I created default .net core application using visual studio 2017 and am trying to publish it, The application works perfectly when I start it with visual studio 2017, IIS Express. But when I publish ...
- 319
25
votes
2
answers
5k
views
How to configure multiple ASPNETCORE_ENVIRONMENT on same machine?
I have ASP.NET core web application. I have configured the web application on our web server and set the ASPNETCORE_ENVIRONMENT variable to Development. I set this variable at machine level like shown ...
- 32.3k
24
votes
2
answers
23k
views
WindowsImpersonationContext & Impersonate() not found in ASP.Core
I had the following in a .NET Framework 4.0 assembly:
var newId = new WindowsIdentity(duplicateTokenHandle);
WindowsImpersonationContext newId = ImpersonatedIdentity.Impersonate();
I'm porting it to ...
- 28k
24
votes
2
answers
26k
views
SMTP settings in appSettings.json in dotnet core 2.0
In Asp.net, I can normally send emails using the following code:
using (var smtp = new SmtpClient())
{
await smtp.SendMailAsync(mailMessage);
}
With the smtp settings being provided in the web....
- 5,273
23
votes
6
answers
51k
views
Model bound complex types must not be abstract or value types and must have a parameterless constructor
I have the following problem, I created an application to add game categories and the games themselves to the database. I created a relationship and unfortunately when I add to the database I get an ...
- 1,176
22
votes
2
answers
17k
views
How do I (gracefully) shut down a worker service from within itself?
I'm using the .NET Core 3.1 worker service template to build a Windows Service.
I gather that the basic flow should be handled within ExecuteAsync, roughly like so:
protected override async ...
- 19.7k
22
votes
6
answers
34k
views
Could not find 'aspnetcorev2_inprocess.dll'. Exception message
I'm trying to publish an asp.net core v3 app to run under IIS. I created a virtual directory, converted to application. It has it's own IIS app pool that is setup with CLR: No Managed Code, 32 bit:...
- 321
21
votes
1
answer
22k
views
Net Core 2.0 looking for appsettings.Production.json
I have created a couple of these .net core 2 web app and no issue until this one.
Running local under IISExpress it runs correctly but when I deploy a debug version to an IIS folder on the server I ...
- 1,793
21
votes
2
answers
21k
views
How can VS Code be configured to run and debug with IIS Express and ASP.NET core?
I have been able to run ASP.NET core applications with Visual Studio 2017. Visual Studio has the integration of IIS Express and ASP.NET core all setup and it works with F5.
I would like to get this ...
- 2,599
20
votes
4
answers
28k
views
Ninject in .NET Core
I am trying to install Ninject 3.3.2 in .NET Core, Released in May 2016. I got an error: The dependency Ninject 3.2.2 does not support framework .NETCoreApp, Version=v1.0.
Does anybody had similar ...
- 294