Develop Reference

ASP.NET View Component Fails to Load in Linux

My web application runs perfectly fine in Windows. I even have it running in production on a Linux server for years without issue.
Now that I try to open the solution on a Linux desktop with JetBrains Rider IDE, the project fails to load at all. I boot up the Windows VM and the very same project runs.
First of all, what is to blame, JetBrains Rider, ASP.NET, or my installation? I've been developing desktop apps without any issue.
I created a new web application to see whether ASP.NET runs and it does. I started copying everything over file by file.
I got Pages/Shared/Components that contains ProductBox.cs and ProductBoxModel.cs and it runs fine. I add the file Pages/Shared/Components/ProductBox/Default.cshtml and it fails to load. There is no error or anything.
Running it simply opens a blank page in Firefox. In Chrome, it will give a 404 error after a security warning. I delete that one specific file and the application starts again.
I found this issue: View Component Loading Issue on Production ASP.NET Core
Moved Pages/Shared/Components/ to Views/Shared/Components. The problem persists.
The View Component breaks the application in Linux, even if the View Component is not being reference at all.
How can I solve this? (other than opening it in Windows)
I got .NET 6 installed, and I'm testing this from a clean project created from template.
OS: Garuda Linux (arch-based)
IDE: JetBrains Rider
Components/ProductBox.cs contains
public class ProductBox : ViewComponent
{
public IViewComponentResult Invoke() => View();
}
Components/ProductBox/Default.cshtml is completely empty

After flipping back-and-forth between the base project, a first blank project template with files copied over, and a 2nd blank project with files copied over... the View Component started to work somewhere along the lines. Got no clue where. There'sFOUND THE PROBLEM after having another problem preventing from bootingpushing the main project in Linux thoughbuild to production.
But then WebApplication1 would boot with all the same times. Started paying attention to any hidden files, likeIn Properties/launchSettingsappsettings.json. In the end; The entire application runs in WebApplication1 with all the same files, and original one still doesn't run, even after deleting obj/bin folders. Just renamed WebApplication1 to the main project name
I was facing 2 problems though. One with View Components giving a blank page, and one with failed connection.
Found the 2nd problem after having another problem pushing the build to production.
In appsettings.json
"Kestrel": {
"EndPoints": {
"Http": {
"Url": "http://localhost:5003"
}
}
}
If that configuration is present, it works in Visual Studio but fails in JetBrains Rider!
Without it; it fails to run on the server.
The solution is to move it to appsettings.Production.json.

Visual Studio 2019 .NET CORE and React Template Subsite

I am having a hard time getting this template to work as a subsite.
The steps that I took to create the project were:
Launch Visual Studio
Create a new project
Select ASP.NET Core Web Application
Gave the details for where the project should be stored, etc
Create
At this time I am not interested in redux so I just selected the "React.js A project template for creating an ASP.NET core application with React.js"
After that I thought that the steps to make this work at a sub-site would be:
Right-Click and Properties on the Web App Project, on the debug tab I set the App URL to what was there + /mysub, for example: http://localhost:57197/mysub
Inside the Client App Folder I modified package.json and set the "homepage" to "/mysub"
When I debug the application nothing renders in the browser. The browser's console shows that it is getting invalid characters when trying to load resources such as manifest.json, and even bundle.js, which tells me that the client side router is probably intercepting the requests for those files, and when I look at the network tab it looks pretty more obvious that is what is going on. The strange thing is though that tag does appear to be right and thus it is setting the %PUBLIC_URL% environment variable as I would expect, but for some reason it just will not work at this subsite location. I suspect that maybe there is more that I may need to do in Startup.cs, or even appsettings.json but I am not sure what that might be, or if even that is the route to go. Any suggestions would be great.

Why data in server is being reset when just partial publishing one DLL file?

After publishing the complete ASP.NET MVC App, with FTP, with Visual Studio 2019, and everything working fine, database is cleared whenever I just upload one program change (DLL file publish)
I have published my first ASP.NET MVC Web App on a server. I published with FTP. All works fine but when I do a change on the code and try to upload/publish the one DLL file that changed, my database is cleared/reset.
Startup.cs will create the first user with generic password if not created yet. And this user is being created every time I upload the DLL file.
Is there anything I am missing on the web.config file? Or any other file?
If the Web App is in Production and I need to do a change, I was hoping not to have to save the database in order to do a minor update.
UPDATE ON ISSUE Thanks to #Logarr's comments below I realised that I had to look elsewhere for an answer - not a problem with the way I was publishing but a Entity Framework issue. Checked the code again and I realised that DBContext definition had the default database.initializer:
Database.SetInitializer(new MySqlInitializer());'
So I changed it to:
Database.SetInitializer<ApplicationDbContext>(new CreateDatabaseIfNotExists<ApplicationDbContext>());
A rookie mistake, I am sure but if anyone has any comment on this solution, please let me know.

Cannot deploy MVC 4 to server

My web application is just a simple web application made in VS 2010 MVC 4 without any code from outside. It's just default application of VS 2010. I have Deluxe Windows Hosting with Plesk. I've never changed any feature in my account. I copy all my files to "//Root Directory". Beside my files I see various folderssuch as: ", plesk, erro-docs, cgi-bin, logs" - I do not have permissions to delete them.
All my projects are "Release" configuration. I've tried all ways which I met in the Internet:
1.I copied three libraries to bin directory:
System.Web.Mvc, System.Web.Routing, System.Web.Abstractions
These dll's I copied from GAC(C:\WINDOWS\Microsoft.NET\assembly\GAC_MSIL). I putted such strings in web.config: < trust level="Medium"/>. I used local deployment(to directory) in VS2010 by button "Publish". No result.
2.I copied 9 libraries to bin directory:
System.Web.Abstractions.dll
System.Web.Helpers.dll
System.Web.Mvc.dll
System.Web.Optimization.dll
System.Web.Razor.dll
System.Web.Routing.dll
System.Web.WebPages.Deployment.dll
System.Web.WebPages.dll
System.Web.WebPages.Razor.dll.
These dll's I copied from GAC(C:\WINDOWS\Microsoft.NET\assembly\GAC_MSIL). I used local deployment(to directory) in VS2010 by button "Publish". I putted such strings: < trust level="Medium"/>. No result.
3.I copied three libraries to bin directory: System.Web.Mvc, System.Web.Routing, System.Web.Abstractions - these dll's I copied from GAC(C:\WINDOWS\Microsoft.NET\assembly\GAC_MSIL). I putted such strings: < trust level="Medium"/>. I used deployment via ftp option in VS2010 by button "Publish". No result.
4.I copied three libraries to bin directory:
System.Web.Abstractions.dll
System.Web.Helpers.dll
System.Web.Mvc.dll
System.Web.Optimization.dll
System.Web.Razor.dll
System.Web.Routing.dll
System.Web.WebPages.Deployment.dll
System.Web.WebPages.dll
System.Web.WebPages.Razor.dll - these dll's I copied from GAC(C:\WINDOWS\Microsoft.NET\assembly\GAC_MSIL). I putted such strings: < trust level="Medium"/>. I used deployment via ftp in VS2010 by button "Publish" No result.
5.I've tried to upload files via filezzilla. < trust level="Medium"/>. However it was an idle attempt.
6.I've tried to upload files via browsers. However it was an idle attempt.
7.I've tried to upload zip-files via browser and extract them at godaddy server. < trust level="Medium"/>. However it was an idle attempt.
All above-listed attempts result the word on the screen: "nup.com My site is launching soon."
Nothing changes.
I have a question.
What I do wrong?
I've read all articles by Phil Haack http://haacked.com/archive/2008/11/03/bin-deploy-aspnetmvc.aspx. Any help will be gratefully appreciated!:)

Ok - you have a lot of questions inside your single question. I am going to try and take these one at a time as well as some of your commentary so that we can a) understand the build/publish process of an MVC app and b) hopefully get your project running over at GoDaddy.
1.If I change in web.config , then should I recompile my project and upload again?
No, unless you change the web.config locally and you need to upload those changes. If you FTP/connect to the web.config on the actual web server, IIS will automatically restart (reload) your application so that it can apply the web.config changes. After a web.config change, you will notice the first request will take 10-20 seconds. This is IIS restarting your application. If you change the web.config locally, then yes, you should rebuild/reupload.
2.Is it correct to copy a project to root of directory?
The way you have phrased this question makes me think that yes, you are doing it wrong. When you create a project in Visual Studio, you get a solution folder on your actual hard drive. If you are compiling that project, then copying the entire solution folder to your web server, then yes, this is not the correct way to do it. What you want to do is create a Publishing Profile. You can either deploy your application via Web Deploy (unsure if GoDaddy supports this), FTP, or File System. By going through the Visual Studio publishing process, the compiler a) compiles your application per your settings (Debug or Release), b) applies the proper Web.Config transformations and c) only outputs the files necessary to run your application. The third part is important. All of your .cs files (controllers, models, etc) get compiled into a .dll and that is what needs to be deployed, not the actual source code files. The publishing process does this for you.
I would recommend you create a folder on your dev machine somewhere, and then create a publishing profile that publishes your application to that folder. It is the contents of that folder that you want to FTP to your web server. To create a publishing profile, right click your MVC project and select Publish. This will bring up the wizard for you to set things up.
3.What I do wrong?
Kind of hard to say at this point. It could be that you are not compiling your application correctly. FTP sounds bonked, but that is not an MVC/Visual Studio issue. For FTP issues with Plesk on GoDaddy (and other items), check this help link here.
4.how can I see the errors? Should I write a message or what should I do to know more about errors?
You should be able to control this in your web.config. Open your web.config file up and check for a couple of lines. You want to turn off custom errors and set the compilation to debug mode. This does two things. One, the error you get back from the server will be way more detailed and being in debug mode allows IIS/.NET to actually show you the line of code that is causing the problem.
<system.web>
<compilation debug="true" targetFramework="4.5" />
<customErrors mode="Off"></customErrors>
</system.web>
Be aware that if you do have a web.config transformation, this could actually turn these setting off. Ensure that your publishing profile is set to deploy the Debug configuration while you test deploying your site. Once you are happy with your results, set it back to Release configuration so that your site runs faster as well as does not display code lines to potentially bad people if an error does occur.
5.I copied 9 libraries to bin directory...
Ok, this could also be a problem. You do not need to copy anything to your bin directory. If you want to include referenced assemblies in your published project, all you need to do is open the References folder under your project. From there, right click any assembly that you want to include in your project when you publish and select Properties. Inside of the properties pane, you will see the option to Copy Local. Set this to true. This tells the compiler to copy that assembly to the output folder during the publishing process (see, that publishing thing does lots of good stuff for you!) I would do this for all assemblies in your project that are MVC related. You can experiment with this (like one at a time) until you find the right combination of assemblies that you need to include in your project to make it run on the GoDaddy server. I have not used GoDaddy hosting in quite a while, so I do not know what their current capabilities are.
Last thoughts, I think MVC 4 is .NET 4 or higher. Ensure that GoDaddy supports .NET 4 or higher or else you really won't be able to host this on that server (even using bin deploy) and will need to find additional hosting. Azure has some really great deals right now and Gearhost is very reliable but a little pricey (though they are completely simple to use).
EDIT
Just a little more info on GoDaddy - ensure that you set your site up correctly before you try any of this. You need to have Windows hosting (most likely) and it should be setup to use the Integrated App pool (else, it would appear you never uploaded anything since there is no 'default document'). At this point, I wonder if your hosting account was provisioned correctly for what you want to do. http://support.godaddy.com/help/article/6639/do-your-hosting-accounts-support-mvc3-applications (Yes, I know it says MVC 3, but the setup applies equally to MVC 4)

Have you tried bin deploying MVC4?
http://haacked.com/archive/2011/05/25/bin-deploying-asp-net-mvc-3.aspx/
or
http://forums.asp.net/t/1884928.aspx
To answer your question:
Changes to web.config should not require the project to be recompiled.

Hope this helps...
Depends what you've changed, some changes might at least require an application pool reset.
Root of what directory? It should generally be inside inetpub/YOURWEBSITEFOLDERHERE
You have assumed that GoDaddy supports MVC 4, I could only find references to them supporting MVC 3 Support
There are rumours that if you deploy the bin and mvc dll there is a way around this but I couldn't find any details.
Have a read of the MVC 3 deploy instructions
EDIT: In answer to comment below:
Editing could have a knock on effect and so i would advise towards a recompile, e.g. change to medium trust might have an affect if DLLs don't work in partial trust mode, and recompilation might well highlight these issues.
Sounds ok, test by putting a html file up with some text and try and get to it in your browser.
I've seen people talking about it, mostly saying it's not supported, try the MVC deploy instructions above to bin deploy MVC 4; it works with 3, it might work with 4.

I had the same problem with a MVC4 I had running on hosting on Godaddy using Plesk. Suddenly, without any changes, site began to display "Site Launching Soon" Page. At first I thought it was hacked. After calling godaddy support, the agent told me that the site must need at least one html file as a start point (index.html, index.aspx, default.aspx - source: http://support.godaddy.com/help/article/60/what-file-displays-when-someone-browses-to-my-domain-name?locale=en&ci=46061), which seemed odd because it was working fine all the time.
Then, after some trial - error stuff, I could solve my problem by going to the Plesk hosting management, and navigate to:
Websites & Domains > [domain name] > Web Server Settings for domain. And there, change the Default Document setting to "Default".
We never touched that setting, not sure really why it suddenly changed.
Hope that helps!

Hope this helps . . .
Global.asax should be your default index . . . in godaddy server settings.
I had a similar problem and was able to solve it.
I have two other mvc application sites hosted on godaddy, but not with their new plesk hosting.
After calling tech support and not having any luck there I did some reading on their hosting.
Their plesk hosting must have an index.
So, a few hours later it dawned on me to point their start point to my Global.asax in their server settings.
And, viola! my site was up and running.

I've done all actions to deploy correctly but I copied all files to a wrong folder. The problem was that I just copied all my files to a wrong directory. I called to godaddy support and they said that I copied my files to wrong directory.
When I copied all files to "httpdocs" directory then my mvc 4 application start working!:).
Thank you a lot, guys. Good luck.

I was having the same issue until I set customErrors to off (first line). then I started seeing security policy issues which was remedied (second line).
(I'm using Godaddy)

Parser Error : Could not create type

I have created webservice and published it on local machine. Then I have uploaded it on server.
Now while I tried to access webservice it gives following error :
Parser Error Message: Could not create type 'webservice.myservice'
Source Error:
Line 1: <%# WebService Language="C#" CodeBehind="myservice.asmx.cs" Class="webservice.myservice" %>
I tried This link but unable to solve my problem.
What should I do?

I don't know if this is dragging something up from the dim and distant past, but I had this problem. I fixed it. So I thought I'd to share it.
When you create a web service in Visual Studio (I'm using 2010 but I'd imagine it's the same for others), it creates a file called Service1.asmx
You will be tempted to rename it to MyService.asmx (or whatever).
Then you'll look inside and see the line
public class Service1: System.Web.Services.WebService
which you'll change to
public class MyService: System.Web.Services.WebService
and then when you try running it, you get the error
Could not create type 'MyProject.MyService'
Because it still thinks the class is called Service1.
If you right click the .asmx file and select view markup, you'll see it still says:
<%# WebService Language="C#" CodeBehind="MyService.asmx.cs" Class="MyProject.Service1" %>
change it to
<%# WebService Language="C#" CodeBehind="MyService.asmx.cs" Class="MyProject.MyService" %>
save it, try it.
It worked for me.

I had the same problem and looked for it for a long time!
I tried a lot of things including the following:
Frameword version incorrect
A whole list of things that could be wrong
None of those worked for me. After some searching, testing and cursing, I finally found the problem: The application (webservice) was incorrectly hosted.
Let me explain with a little background:
I had a project containing two solutions: One solution was the website that I made (html, javascript, etc), the other solution contained a folder with the business logic, the database model and the webservices. Obviously the webservices folder contained my .asmx files and code-behind for them.
Project
Data Core
Database Model
Business Logic
Webservices
myWebservice.asmx
Website
I was hosting these in the following way:
My website was hosted as a new site with the website folder as root folder
My webservices I was hosting as an application in my website, with the webservices folder as root
More visually:
IIS 7
My Website => Pointing at the "Website" folder
Webservices Application => Pointing at the "Webservices" folder in the Data Core
This resulted in the following url "http://website/webservices/myWebservice.asmx", which gave me the "Could not create type" error.
Now, after playing around a bit I tried hosting my webservice application starting with the data core as root, instead of the webservice folder.
Visually:
IIS 7
My Website => Pointing at the "Website" folder
Webservices Application => Pointing at the "Data Core" folder.
Obviously using the same url as before would give me a "File not found" error. However, using the following url "http://website/webservices/webservices/myWebservice.asmx",I finally got my working webservices page!
A small url breakdown:
http ://website/ => My website from the "Website" folder
webservices/ => Equivalent to the "Data Core" folder
webservices/ => The "webservices" folder in the "Data Core" folder
myWebservice.asmx => The webservice file in the "webservices" folder, in the "Data Core" folder
I assume that because I was hosting my webservices directly from the "webservices" folder in the Data Core, that the server could not find the compiled DLL of the webservices (which resides in the "bin" folder), since I was hosting at a deeper level.
After changing the configuration and hosting the webservices from the "Data Core" folder, the IIS server could "see" the bin folder and host the webservices succesfully. When using the correct url that is ^_^
I hope this is clear and helps you with you problems!

Another thing that can cause the problem. Is not creating an application for the project through the IIS itself. If the code is already on the server navigate to it in IIS from the left Connections pane. If the web site directory is still a yellow folder icon (and not a globe icon) you need to right-click on it and choose Convert to Application otherwise follow these steps...
Start -> Search For IIS
Open It!!
Right Click on the Default Web Site or the web site you are planning to publish the service to it.
Add application... Enter an Alias ex. "MyWebService" ... Choose the physical path. in my case was C:\inetpub\wwwroot\MyWebService which is my default web site path.
Then when you publish through Visual Studio choose that folder. or just copy your code files to it.

I'm fairly certain this is just a summary of what Glenn said, but I ran into this issue because my application was created from the directory one level too high in the directory structure.
For example, my web service was in SiteProject_1/SiteProject_2/service.asmx
Originally SiteProject_1 was what I converted into the application within IIS. I was able to resolve the issue by removing that application within IIS and instead making SiteProject_2 into the application.

I was having this problem this morning and Google landed me here, but none of these answers worked for me. But I did figure out what was wrong - at least in my case - so I thought I'd share it in case it helps others.
I had a web service that had been working fine for months in a solution with other parts of the application that I work on. Yesterday, I needed to fix something in a release branch, so I opened Visual Studio on a copy of the solution in another directory. Visual Studio decided to be helpful and silently remap all my virtual directories in IIS to where the programs would be in the release folder (if I had bothered to build them, which I hadn't). Now when I tried to hit my web service, IIS was pointing to the release version which had the asmx but no bin folder.
Opening the Web properties tab in my development solution and clicking the Create Virtual Directory remapped it back to the development version and all was good with the world again.