Develop Reference

Click once not installing appsettings to users machine

I'm new to using click once when publishing my applications, I've managed to get my application published. However, when I launch the application as a user I'm finding that the app settings file has not been pulled from the server to the user's device. This results in the application falling over on startup.
My question is how when publishing via Click once can I ensure that an app settings Json is copied to the user's machine?
I'm using .net core 3.1 for my application with Microsoft Visual Studio Community 2019
Version 16.8.3 for my IDE for complete context.

After adding appsettings.json (or any content file) make sure you set the build action to Content and set Copy to output directory to Copy Always (or copy if newer):
Then it will be automatically included as part of the deployment files. To make sure the file will be included in the deployment files, in the ClickOnce setup, in settings step, click on Application files and make sure the publish status is Include (Auto):

Host WebAPI to Azure Error : HelpPage_Default

Currently I try to host webAPI to Microsoft Azure and it is showing me this error as below, but when I am running it on localhost, it is not showing this error.
Error in HelpPage_Default

According to your description, since it's working on your local side, I assumed that you could clean your solution and remove all files under your bin folders, then rebuild your solution. When deploying your web application via Visual Studio, check "Remove additional files at destination" under "Settings > File Publish Options" as follows to avoid something residue from older versions of your code.
Also, you could leverage KUDU to compare your deployed web application content with the local version. Delete all files under "D:\home\site\wwwroot" via KUDU, and re-deploy your web application.

TFS CI build to Azure Web App (App Service) fails due to file locking (msvcr100.dll)

Problem
Getting a deployment error when trying to publish to an Azure Web App from TFS CI. A file is locked and this prevents the build from updating.
Symptoms
Publishing manually (Web Deploy publish from within Visual Studio) usually succeeds.
Stopping the Web App and publishing allows it to succeed, however this defeats the point of our CI if we need need to stop and start the Web App each time.
CI publish to Web roles and Worker roles don't appear to have this issue, we only get it on publishing to Web Apps (formerly Web Sites, the current Azure Portal term is now App Service).
Only publishing from a CI build via TFS fails consistently in this way.
Error
Web deployment task failed. (Web Deploy cannot modify the file
'msvcr100.dll' on the destination because it is locked by an external
process. In order to allow the publish operation to succeed, you may
need to either restart your application to release the lock, or use
the AppOffline rule handler for .Net applications on your next publish
attempt. Learn more at:
http://go.microsoft.com/fwlink/?LinkId=221672#ERROR_FILE_IN_USE.)
The information at the link isn't very helpful.
ERROR_FILE_IN_USE
Diagnosis – A destination file cannot be overwritten or deleted because it is currently in use.
Resolution – Make sure that the destination file is not in use before performing a sync. If you are syncing content to a web site
hosted on IIS 7 or later (using the appHostConfig, iisApp, or
contentPath providers), consider taking the application offline during
the sync by enabling the appOffline rule.
Attempted resolutions
We were using New Relic - have since removed New Relic and this issue still persists. The binary appears to be a Microsoft library but it's unclear how it is relevant to the application (it's not referenced).
Some other SO questions have addressed similar issues with publishing but none of these relate to getting this issue from TFS CI.
azurew website continious deployment - Web Deploy cannot modify the file 'XXX' on the destination because it is locked by an external process
How to take web app offline while publishing?
One answer in the above question suggests using the EnableMSDeployAppOffline configuration in the publish profile, and adding this configuration works OK for doing a publishing manually from within VS but it doesn't fix the problem when publishing automatically from TFS/CI.
Edit
How to take web app offline while publishing? deals with taking the app offline using the EnableMSDeployAppOffline configuration - unfortunately this config only seems to be supported when doing WebDeploy through Visual Studio (not CI).

You can use the Web Deploy v3 in CI to deploy your web app.
In Web Deploy V3, we added support to automatically take an ASP.Net
application offline before publishing to it. This is useful if a user
wants to ensure that their application does not have a lock on a file
(e.g. SQL CE sdf files which only allow one connection to the file at
a time) being overwritten, or if they want to ensure that visitors to
their site cannot affect the publish process. When the publish process
is completed, the App_Offline.htm file will be removed and the site
will be online again.
Or you can add a PowerShell script like following to deploy the web app to Azure:
param($websiteName, $packOutput)
$website = Get-AzureWebsite -Name $websiteName
# get the scm url to use with MSDeploy. By default this will be the second in the array
$msdeployurl = $website.EnabledHostNames[1]
$publishProperties = #{'WebPublishMethod'='MSDeploy';
'MSDeployServiceUrl'=$msdeployurl;
'DeployIisAppPath'=$website.Name;
'Username'=$website.PublishingUsername;
'Password'=$website.PublishingPassword}
Write-Output "Stopping web app..."
Stop-AzureWebsite -Name $websiteName
Write-Output "Publishing web app..."
$publishScript = "${env:ProgramFiles(x86)}\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Web Tools\Publish\Scripts\default-publish.ps1"
. $publishScript -publishProperties $publishProperties -packOutput $packOutput
Write-Output "Starting web app..."
Start-AzureWebsite -Name $websiteName
Reference from: https://msdn.microsoft.com/en-us/Library/vs/alm/Build/azure/deploy-aspnet5

The new "Deploy AzureRM Web App" task has an option to take the app offline which will prevent this error.
See screenshot for checkbox

Update Javascript libraries when deploying a web application to Windows Azure

I have an MVC4 web application that uses jquery and some other libs (jquery-ui in particular).
Yesterday I decided to update all the packages via NuGet package manager; my web application worked correctly on my local machine, but when I deployed it to my azure website a javascript error popped out in my browser (it was related to jquery-ui library, something like "$browser is not a function").
I searched the web and found out that the cause of this error was that I was still using an old version of jquery. It seems that deploy process didn't publish the new version of the js libraries even if they have been updated in local project.
I solved the problem connecting via RDP to the Azure machine, deleting the contents of "Scripts" folder and deploying again, but I'm wondering if there's a way to "force" script/libraries update when deploying to Azure.
Edit 1: I'm developing with Visual Studio 2012, using Mercurial as source control provider
Edit 2: I'm deploying to Azure Web Sites

Please, in your future questions clearly indicate what type of Azure Service do you use. An MVC4 web application can be deployed to 3 different type of services: Azure Web Sites, Azure Cloud Service, Azure Virtual Machine!
Since you are talking about RDP, the viable options are Cloud Service or Virtual Machine. But then you say
I solved the problem connecting via RDP to the Azure machine, deleting
the contents of "Scripts" folder and deploying again, but I'm
wondering if there's a way to "force" script/libraries update when
deploying to Azure.
Now the question is how you do deploy to Windows Azure? Is it via Visual Studio's Publish feature to Azure Cloud Service. Is it Visual Studio's Package feature and then using any other method of deployment (upload the package from the portal, use Azure PowerShell cmdlets, or use third party tool to deploy the package)? Is it integration with Mercurial and deployment is done automatically when you check-in?
Any any case, the issue you face is a mixture of NuGET failing to do real clean update of everything. Browser caching - especially for local development - IE caches all the scripts, CSS and images and it is hard to say (without explicitly deleting all locally cached files) which script are you actually using. Simple version control issue - keeping old and new scripts.
When you do a JS/CSS updates I strongly advise all the customers to first delete all browser's cache (crtl+shift+del - works for all browsers) before testing locally.
I highly doubt that if you use a Cloud Service, RDP-ing and deleting anything in the sitesroot folder will help you when you redeploy. What you do in the ROLEROOT drive (usually E:, sometimes F: drive) is dropped of/forgotten when you re-deploy regardless of the re-deploy method you use: in-place-upgrade or full re-deploy. So what you did is actually creating new package and re-deploying your new package.
The fact that you deleted some folder has no effect on your re-deploy action.

Publish a web service on Visual Studio 2010

I created a web service in C#, using Visual Studio 2010 ( Framework .NET 3.5). In debug mode it works great, but now I must publish it on the internet, so that I can consume it in remote (the app that will consume the web service is an android app).
So the question is: how do I publish my web service on Internet so that I can consume it in remote?
Thanks in advance; this is a work for taking my degree!

A simple way: you switch to release mode, update your web.config for production, right click on your service project and from the menu select publish. Then you publish it to the local folder. This way it copies only the files needed. Then you copy the contents of the folder to your remote site using ftp, for example, your hosting provider should have given you the credentials.
for some hosters it is also possible to publish directly but I don't use this.