Develop Reference

change web.config back to previous setting

I have split my App_Code folder into VB and CS folders, to accommodate the two class files at compile time. I added the following to the web.config file to make it work.
<compilation debug="true" strict="false" explicit="true" defaultLanguage="C#">
<codeSubDirectories>
<clear/>
<add directoryName="VBCode" />
<add directoryName="CSCode" />
</codeSubDirectories>
</compilation>
I now want to remove the two folders and go back to a single vb only... IF I delete the above code from the web.config file I get the following error:
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: The code subdirectory '/mysite/App_Code/VBCode/' does not exist.
Source Error:
An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.
Source File: E:\web\web.config Line: 75
This is on a hosted site and it appears I don't have access to the machine.config or ability to view it?
How can I go back to previous configuration?
EDIT:
I understand the use of <clear/> but I'm looking to delete the folders from the site... refference: https://msdn.microsoft.com/en-us/library/ms228265(VS.85).aspx

Running ASP.NET MVC on Meduim-Trust environment

I am newbie to ASP.NET MVC, I developed a new web application using ASP.NET MVC, Entity Framework on .NET 4.5 and it is working just fine.
When trying to deploy onto a shared hosting server, I got an error as the Trust is set to Medium and there is noway to change it to Full.
Even on my local machine if I set Trust to Medium I got same exception:
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Exception Details: System.Security.SecurityException: Request for the
permission of type 'System.Security.Permissions.SecurityPermission,
mscorlib, Version=4.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089' failed.
How could I fix my configuration to allow my application to work on Medium Trust environment. Noticing that my application is not using anything from outside.
Thanks

ASP.Net MVC 5 no longer support partial trust for you need to develop this application in MVC 3 or MVC 4. For more information please read this this answer

You can change configuration of application in web.config file
<system.web>
<securityPolicy>
<trustLevel name="Full" policyFile="internal"/>
</securityPolicy>
</system.web>
Also refer to this if need more details
https://our.umbraco.org/forum/getting-started/installing-umbraco/62071-SystemSecurityPermissionsSecurityPermission-at-Godaddy-hosting
How do I resolve a System.Security.SecurityException with custom code in SSRS?
https://msdn.microsoft.com/en-us/library/wyts434y.aspx
https://support.microsoft.com/en-us/kb/555466

System.Security exception on asp.net webpage - c#

I am having an issue where when I run my asp.net website, I get a security exception to do with the trust level in the config file. I have tried adding the following code into the config file in the solution, but no luck;
<securityPolicy>
<trustLevel name="Full" policyFile="internal"/>
</securityPolicy>
Description of the 'Security Exception' -
The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Exception Details
System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I am only trying to run this locally from Visual Studio, and it has been working before.
We have recently moved our environments from working in a TS session (where vs2010 is), to having our own virtual machines (where vs2012 is). To get to the VS2010, we have to remote in from our virtual machine, and each time we log in it brings over our documents folder and everything. Could it be to do with this, logging in from somewhere else causes permission issues?
Many thanks.

launching a web service (.asmx) in a IIS 6.0

I have developed a web service with the .asmx extension using C# and i want to deploy this into my VPS which has Windows Server 2003 with IIS 6.
Service is running with Framework 4.0 and it's installed in the VPS also. When I upload the precompiled version into the VPS it shows a runtime error
Server Error in '/' Application.
Runtime Error
Description: An application error
occurred on the server. The current
custom error settings for this
application prevent the details of the
application error from being viewed
remotely (for security reasons). It
could, however, be viewed by browsers
running on the local server machine.
Details: To enable the details of this
specific error message to be viewable
on remote machines, please create a
<customErrors> tag within a
"web.config" configuration file
located in the root directory of the
current web application. This
tag should then have
its "mode" attribute set to "Off".
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>
Notes: The current error page you are
seeing can be replaced by a custom
error page by modifying the
"defaultRedirect" attribute of the
application's <customErrors>
configuration tag to point to a custom
error page URL.
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
can anyone help me on this?
Update
Server Error in '/' Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to >service this request. Please review the specific error details below and modify your >configuration file appropriately.
Parser Error Message: Unrecognized attribute 'targetFramework'. Note that attribute names >are case-sensitive.
Source Error:
Line 26:
Line 27:
Line 28:
Line 29:
Line 30: Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
Source File: C:\Inetpub\vhosts\akashvahini.com\httpdocs\web.config
Line: 28
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET >Version:2.0.50727.3053
this is the new error message after enabling debugging in the web.config

You should enable debugging to diagnose the problem.
Microsoft has a very detailed explanation on how to enable detailed debugging over here.
Server Error in '/' Application.
That error is too generic, check the output after you enabled debugging and post the results.
And don't forget to disable debugging after your site goes live.
Update:
Seems to be permission related:
http://forums.iis.net/p/1042369/1454379.aspx
The ASPNET user account needs permissions for the folder that contains your asmx service.
Update2:
You can give the ASPNET user permissions using the file system permission dialog:
http://www.asp.net/learn/whitepapers/denied-access-to-iis-directories
Might look different on newer versions of Windows.

From my experience "Server Application Unavailable" means that you have got web sites that use different versions of .net in the same application pool.
the site that hosts your webservice needs to be in an app pool that only has .net 4.0 web sites. The application pool is configured on the Home Directory tab in the web site properties.

Looks to me like the application pool is trying to run two difference versions on .net.
Make a new application pool and call it something like .Net4 and then move the new site across to use this app pool and everything should work.
This error is shown by
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET >Version:2.0.50727.3053
Where the site with a .asmx should say .Microsoft .NET Framework Version:4.0 etc...

How to solve a "HTTP Error 404.3 - Not Found" error?

Simple problem. I start up VS2008 and create a new WCF Service application. This will create a default application with a few test methods showing it works. I press CTRL+F5 and it does indeed work! Great! However, it uses the Visual Studio Development server, which I don't want to support.
So I go to the project properties, switch to using a local IIS Web server, create the virtual directory and press CTRL+F5 again. And this "HTTP Error 404.3 - Not Found" error is greeting me back.
So something in my IIS7/Vista-64 setup is wrong. What could I be missing?

Click Start -> Run cmd and type:
cd "\Windows\Microsoft.NET\Framework\v3.0\Windows Communication Foundation"
ServiceModelReg.exe -i

If you faced this problem for the first time. with Windows 8 and IIS 8.0 make sure to activate Windows Communication Foundation HTTP windows feature.
Go to Control Panel select "Programs and features"
From the lift hand side menu select "Turn Windows features on or off".
Expand ".Net Framework 3.5 (includes .NET 2.0 and 3.0)" item
Finally select "Windows Communication Foundation HTTP Activation"
Enjoy your WCF Servcie.

The problem, however, is then to re-register ASP.Net to IIS, which is explained below.
And also if you're on a 64bit machine always use Framework64 paths: C:\Windows\Microsoft.NET\Framework64\v4.0.30319>aspnet_regiis.exe -iru
Below is the explanation from Microsoft:
http://download.microsoft.com/download/0/A/E/0AEB3BC1-506E-4954-8AB1-4FA2EE75985C/ReleaseNotes.docx
When attempting to run a service that receives messages over the HTTP transport, you may receive an error similar to the following:
Server Error in '/WCFApplication' Application
Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
Description: An unhandled exception occurred during the execution of the current Web request. Review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
This error can occur when IIS is installed after installing .NET Framework 4, or if the 3.0 version of the WCF Http Activation module is installed after installing IIS and .NET Framework 4.
To resolve this problem, you must use the ASP.NET IIS Registration Tool (Aspnet_regiis.exe,) to register the correct version of ASP.NET. This can be accomplished by using the –iru parameters when running aspnet_regiis.exe as follows:
aspnet_regiis.exe -iru
And credit, where it's due: Source

I had to tick "HTTP Activation" in "Add Role Services" within Windows Server 2012.

try to install IIS by expanding your Internet information service and then check ASP.Net 3.5 or ASP.Net 4.5 and ISAPI.... in root of world wide.........
please look image to more help

I tried running ServiceModelReg and aspnet_regiis.exe with various flags and added HTTP Activation feature but it still didn't work. What finally worked was adding the following handler manually to my web.config file.
<system.webServer>
<handlers>
<add name="svc-Integrated" path="*.svc" verb="GET,HEAD,POST,DEBUG" type="System.ServiceModel.Activation.HttpHandler, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" modules="ManagedPipelineHandler" scriptProcessor="" resourceType="Unspecified" requireAccess="Script" allowPathInfo="false" preCondition="integratedMode" responseBufferLimit="4194304" />
My project was running .Net 3.5 and IIS was 7.5 and 7.0.