How to check if session value is null or session key does not exist in asp.net mvc - 5

I have one ASP.Net MVC - 5 application and I want to check if the session value is null before accessing it. But I am not able to do so. ``` //Set System.Web.HttpContext.Current.Session["TenantSessio...

25 Jan at 15:32

ServiceStack ApiKeyAuthProvider fires 6 select statements on every request

I have a web service that's configured to use the `ApiKeyAuthProvider` like so: ``` container.Register<ICacheClient>(new MemoryCacheClient()); container.Register<IAuthRepository>(c => new OrmLiteAut...

25 Jan at 14:49

Remove all items from a FormArray in Angular

I have a form array inside a FormBuilder and I am dynamically changing forms, i.e. on click load data from application 1 etc. The issue I am having is that all the data loads in but the data in the Fo...

6 Jan at 19:30

Culture is suddenly not supported anymore on Azure web app

Out of the blue our Azure web app is spewing out errors regarding a Culture that is not supported. We load up a list of countries to show on the front page but this is suddenly giving errors. The same...

how to update spyder on anaconda

I have Anaconda installed (Python 2.7.11 |Anaconda custom (64-bit)| (default, Feb 16 2016, 09:58:36) [MSC v.1500 64 bit (AMD64)] on win32) and I am using Spyder 2.3.8 Would like to update Spyder to...

27 Nov at 22:41

Websockets using OWIN

All the examples using Microsoft WebSockets over a web-api that I've seen so far use IIS, the implementation is on the get method the HTTP connection is upgraded to a websocket and an instance of webs...

27 Jan at 07:52

Remove outlook meeting request

I'm creating an application in C#. In this i can create a meeting request that is sent to the user through code and appears in Outlook mail. The below code is what I am using to send the meeting invi...

22 Jun at 23:20

Download an image using Axios and convert it to base64

I need to download a .jpg image from a remote server and convert it into a base64 format. I'm using axios as my HTTP client. I've tried issuing a git request to the server and checking the `response.d...

25 Jan at 08:29

Get value from ModelState with key name

I am adding some error messages to my `ModelState` from controller so that I can display it in my view. My Code is like this ``` ModelState.AddModelError(key: "MyError", errorMessage: "This phone num...

25 Jan at 07:10

.NET Core UseCors() does not add headers

This would be a duplicate of [How does Access-Control-Allow-Origin header work?](https://stackoverflow.com/questions/10636611/how-does-access-control-allow-origin-header-work), but the method there al...

How to render HTML in string with Javascript?

I have the following javascript code: ``` var html = '<div class="col-lg-4 col-references" idreference="'+response+'"><span class="optionsRefer"><i class="glyphicon glyphicon-remove delRefer" style=...

25 Jan at 04:55

Inline variable declaration not compiling

I've been getting a message in Visual Studio 2017, specifically, `IDE0018 Variable declaration can be inlined.` So I try using an inline variable declaration the way it's mentioned in the visual stud...

How is it that can I execute method on int? set to null without NullReferenceException?

I have read on MSDN that: > The null keyword is a literal that represents a null reference, one that does not refer to any object. But I've seen the following code running without throwing any exc...

24 Jan at 20:5

Service Stack plugins not killing application after failure

It seems as though service stack is swallowing exceptions thrown by custom plugins. The only way I can determine that a plugin has failed is with exception breaker. Is there a way to throw an excepti...

24 Jan at 18:32

Only one usage of each socket address (protocol/network address/port) is normally permitted?

I've been looking for a serious solution on google and I only get "Registry solutions" kind of stuff which I don't think even relate to my problem. For some reason I get this Error, while I'm only sta...

Can the template/CSS of the Swagger plugin for ServiceStack be customized?

When using the Swagger plugin for ServiceStack, is it possible to customize the HTML/CSS template for the Swagger UI page?

24 Jan at 16:37

Hangfire dependency injection with .NET Core

How can I use .NET Core's default dependency injection in Hangfire? I am new to Hangfire and searching for an example which works with ASP.NET Core.

27 Aug at 08:20

Checkbox not visible on nodes of TreeView control when deployed in IIS

I am facing issue with regards to the `TreeView` control. I have checkbox enabled for nodes of `TreeView` control. It is working fine and showing properly. But when I deploy same to IIS, checkbox is n...

10 Mar at 22:45

how to apply mask to CompositionBrush

``` <Grid> <Image x:Name="BackgroundImage" Source="/Assets/background.png" /> <Rectangle x:Name="ClippingRect" Margin="50" Fill="#30f0" /> </Grid> ``` How do I apply alpha mask, or clipping ...

14 Feb at 14:44

loading a full hierarchy from a self referencing table with EntityFramework.Core

Explanation why this question is different to: [EF - multiple includes to eager load hierarchical data. Bad practice?](https://stackoverflow.com/questions/23497079/ef-multiple-includes-to-eager-load-h...

Moving all files from one directory to another using Python

I want to move all text files from one folder to another folder using Python. I found this code: ``` import os, shutil, glob dst = '/path/to/dir/Caches/com.apple.Safari/WebKitCache/Version\ 4/Blobs ...

8 Sep at 10:2

Can I make an ASP.NET Core controller internal?

ASP.NET (and Core) controllers need to be `public`. Problem is I have a controller which depends (in its constructor) on something `internal`. And that dependency depends on something internal, which...

24 Jan at 09:56

System.NotSupportedException - Cannot compare elements of type 'System.Linq.IQueryable

I am currently getting the below error > An exception of type 'System.NotSupportedException' occurred in >EntityFramework.SqlServer.dll but was not handled in user codeAdditional information: Cannot c...

20 Jun at 09:12

ModuleNotFoundError: What does it mean __main__ is not a package?

I am trying to run a module from the console. The structure of my directory is this: [](https://i.stack.imgur.com/naRKa.png) I am trying to run the module `p_03_using_bisection_search.py`, from the ...

Asp.Net Core: register implementation with multiple interfaces and lifestyle Singleton

Considering the following interface and class definitions: ``` public interface IInterface1 { } public interface IInterface2 { } public class MyClass : IInterface1, IInterface2 { } ``` is there any...