My class derives from System.Web.Security.MembershipUser
I am getting this error when submitting the form. The popup form uses ASPPDFand the application did not have this problem before implementing the custom MembershipProvider goodies. Note this is a debugging error only. It seems to work when I am not debugging. Does anyone know how I can fix this?
NonComVisibleBaseClass was detected
Message: A QueryInterface call was made requesting the default IDispatch interface of COM visible managed class 'XyAmpUser'. However since this class does not have an explicit default interface and derives from non COM visible class 'System.Web.Security.MembershipUser', the QueryInterface call will fail. This is done to prevent the non COM visible base class from being constrained by the COM versioning rules.
Thanks,
~ck in San Diego
I have recently discovered this error in a totally unrelated scenario to yours.
Navigate to Debug->Exceptions...
Expand "Managed Debugging Assistants"
Uncheck the NonComVisibleBaseClass Thrown option.
Click [Ok]
Here is more information, which may help.
Just to keep this up to date:
In Visual Studio 2019: Debug Menu, Windows --> Exception settings, opens the Exception settings window. There expand "Managed Debugging Assistants" and finally uncheck NonComVisibleBaseClass
this is telling you that:
Your project contains some COM based objects which is not signed with a key to public usage.
There are 2 solution to this case:
1- Uncheck NonVisibleCome choice from the debugger settings
2- Find your objects code sign it and rebuild it.
Related
I've recently just discovered the power of Tracing(no clue why it took this long). The theory and practice wasn't unknown to me just the resources available in .Net for doing so. Traditionally I would just log the parts of my programs that I needed to investigate until I got an answer to any problems or confusion. As of recent this task just doesn't give me enough information and is far too tedious as my application is too big now. There are not a lot of clear resources on much of this so I have a few questions:
If I add my own trace listener source to the trace.listeners collection will that trace listener receive the trace information that can be seen in the trace.axd page when tracing is enabled in the web.config of my application?
If so how would I go about creating said listener that can receive that input? I've created my own class that implements the trace listener class and I can't seem to get any other input to be logged other than my own? Have I misunderstood something?
If there is another way to log my application line by line without having to place my own logging, that would be very very helpful. Thank you.
If I add my own trace listener source to the trace.listeners
collection will that trace listener receive the trace information that
can be seen in the trace.axd page when tracing is enabled in the
web.config of my application?
You will be able to see anything written to Trace. The trace that is written to trace.axd is a bit different from a plain vanilla TraceSource, TraceListener, etc. The biggest difference is that it uses the Trace object, which is the .NET 1.1 way of doing trace. in .NET 2.0 & later, named TraceSources are introduced.
If you register a TraceSwitch, TraceSource and TraceListener in your web config, you can enable listening to any TraceSource that you know the name of, the WCF libraries are an example.
Other places document TraceSource and TraceListener and switches better than I can, e.g. http://blog.stephencleary.com/2010/12/simple-and-easy-tracing-in-net.html or https://msdn.microsoft.com/en-us/library/ms228984(v=vs.110).aspx
If so how would I go about creating said listener that can receive
that input? I've created my own class that implements the trace
listener class and I can't seem to get any other input to be logged
other than my own?
You can start by subclassing the ConsoleLogListener or a TextWriterTraceListener. This library has many tools for dealing with the rough edges of System.Diagnostics Trace. https://essentialdiagnostics.codeplex.com/
(Because the built in library has rough edges, expect to see a few people tell you to use some other logging library, there are many, but only System.Diagnostics is built in and always available)
If there is another way to log my application line by line without
having to place my own logging, that would be very very helpful.
This requires "code weaving" or Aspect oriented programming, where you use a tool to recompile your application and add things like logging or trace everywhere or where ever a certain attribute is found. PostSharp is one such application. Memory profiles sort of give you that line by line trace as a byproduct of showing you where your application is spending most of its time.
I get the following error with a legacy asp application that I have been asked to help out with.
Server object error 'ASP 0177 : 800401f3'
Server.CreateObject Failed
/site_manager/image_upload.asp, line 27
800401f3
The line ofcode that throws the error is shown below:
Set fbase = Server.CreateObject("chili.upload.1")
As you ahve probably guessed oldschool asp isn't my strong point but from the research I have done it seems as if a component hasn't been registered on the server (I only have FTP access).
What component needs to be regsistered?
Thanks for the help...
You're missing the registration of the DLL that creates the chili.upload.1 object. Are you trying to run this on a Linux machine?
You need to register the Sun Chili!Soft ASP components. Here's the manual on this from 2003:
http://ns7.webmasters.com/caspdoc/html/running_the_setup_program_sun_chili_soft_asp_for_windows.htm. Note that this only works if you still have the original setup. Otherwise you're out of luck. Sun Chili!Soft ASP is no longer available and very, very dead.
If you're just interested in file upload functionality on ASP, I can recommend Free ASP Upload. It requires no registration of any components and generally works. I can also recommend this article on the topic of ASP uploads. If you're willing to shell out some money there are hundreds of components that do the same thing too.
Register the DLL on your computer, and then do this:
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\
FeatureControl\FEATURE_IGNORE_ZONES_INITIALIZATION_FAILURE_KB945701
Note If the FEATURE_IGNORE_ZONES_INITIALIZATION_FAILURE_KB945701 subkey does not exist, you must manually create it. If you're using a 64 bit OS, you may need to use HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\ FeatureControl\FEATURE_IGNORE_ZONES_INITIALIZATION_FAILURE_KB945701 instead
Right-click FEATURE_IGNORE_ZONES_INITIALIZATION_FAILURE_KB945701,
point to New, and then click DWORD Value
Type w3wp.exe to name the new registry entry, and then press ENTER.
Right-click w3wp.exe, and then click Modify.
In the Value data box, type 1, and then click OK.
After setting this registry key, a simple app pool restart will apply the change. No longer will your .NET COM components randomly stop working with no real solution except shuffling application pools!
We are getting intermittent problems on a production server that we cannot recreate.
There are two very strange things about the issue. Firstly it's a method not found error on the constructor (ctor) for an exception handling helper class and secondly we have custom errors switched on for remote users and this property is being ignored.
The detail of the error is:
Server Error in '/MyWebsite' Application.
Method not found: 'Void MyExceptionHelperClass..ctor (System.Exception)'.
...
Exception Details: System.MissingMethodException: Method not found: 'Void MyExceptionHelperClass..ctor (System.Exception)'.
...
The stack trace is pretty unhelpful.
My thoughts are that there may be an out-of-memory error or something like that that is killing the page. When the exception handling code kicks in it tries to create an exception object which fails for the same reason giving this error.
However this is wild speculation. We are waiting for the event logs to see whether anything is amiss with the server but in the meantime does anyone have any thoughts or suggestions?
UPDATE:
It has proven difficult to get information out of the team responsible for the production servers but I have managed to find out that as far as load balancing is concerned, this site is currently only running on one server (this can be made to switch over onto another if necessary). Given that this is an intermittent problem and there is only one server involved, then I find it difficult to believe that this could be an assembly issue. Surely if it was then the problem would occur every time?
If you see this error happening on a site that has custom errors turned on, then the error is happening in the custom error handling routine itself.
From the look of the .NET error message it appears that your routine is expecting a constructor that accepts an exception by reference - your comment above shows a constructor that accepts by value.
Check carefully that there isn't a stale version of an assembly in your system somewhere. These can lurk in the Temporary ASP.NET Files folder; you'll need to do an "iisreset /stop" before you can clear them out.
In that regard it's always a good idea to make sure that AssemblyInfo.cs is set up to automatically stamp version numbers in some way. We have our version numbers tied to our source code repository system and CI build box so we can tell exactly what was in what assembly really easily.
I would use elmah: http://code.google.com/p/elmah/ to hopefully give you a bit more insight into the issue. It is free and can be used on an existing site without any recompilation. Try it - and post back if the issue is still happening.
As others have also mentioned, I would suspect that your site is somehow using an out of date version of an assembly. Something you could try doing is a full Precompile of your site before deploying to your production server. This ensures that ASP .Net doesn't dynamically compile the site on the fly, and therefore should mean that it's using completely up to date code throughout.
Do you have a no parameter public constructor defined for MyExceptionHelperClass in your code? Or is the class meant to only have static methods, in which case it should be a static class.
public class MyExceptionHelperClass()
{
public MyExceptionHelperClass() { }
}
Unfortunately, this may be one of those cases where the error message is of little to no value. In my experience, this general class of exception may be the result of either a configuration issue or bad logic aroung threading/app domains. For example, I have seen similar issues upon attempting to load the same assembly into an app domain more than once.
You mention that this is difficult to reproduce. If it's only happening on one server in the production farm it's more likely to be a config issue (with that machine). If it's happening on more than one server than it could be either config or threading.
It might be worth spending some time looking at the larger code base around the areas mentioned above. The root cause may not be in this class. Good luck!
I think it's a Framework issue with keeping compiled versions consistency. It's common to see same sort of errors while updating site sources repeatedly. Just try something like
net stop iisadmin /y && del /q /f /s "%systemroot%\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\*.*" && iisreset
I encountered this exception today on a webforms page. I found a solution, but I'm not sure why it worked.
Nest the code behind in a 'Namespace [YourNamespace]' tag.
Add the namespace to the html Page tag's Inherits property in the aspx page 'Inherits="PathStart.YourNameSpace.ClassName"'.
Rebuild
Navigate to the page again and you should not encounter the exception.
After following the steps above I reverted the changes and did not re-encounter the exception.
I'm currently using Microsoft Code Contracts in an ASP.NET MVC application without any issues but I can not seem to get it quite running in a basic ASP.NET Web site. I'm not entirely sure it was made to work with this type of project (although it shouldn't matter) so I wanted to bring it up to everyone.
I can compile the contracts just fine but the code skips over them since I'm assuming it hasn't been enabled through the Properties Page like you would do in other project types (ie ASP.NET MVC). I've gone to the property page of the project (which displays a dialog instead of the typical properties page) in my ASP.NET web site but it does not yield the same menu options and as such, doesn't have a section devoted to Code Contracts.
Also, I have Microsoft Code Contracts properly enabled within a class library project that I use to separate my business logic from the web site. The contracts compile fine but when a contract is violated, it throws a rather uninformative "Exception of type 'System.ExecutionEngineException' was thrown" error with no inner exception. My contract specifies a message to display upon violation but it is nowhere within the exception. It simply halts the execution of the process (which I believe is the default functionality for Microsoft Code Contracts).
I can't find anywhere that explicitly states that a particular project type can or can't (or shouldn't) be used with Contracts so I just wanted to see if anyone has had this issue.
Thanks for any help!
I had the same problem and this is how I solved it:
In the Referenced Class Libraries, right click -> properties -> code contracts.
Make sure "perform contract checking" is checked. I had mine set to "Full"
Contract Reference Assembly: make sure it is set to "Build"
Save your changes.
In the Referenced Class Libraries that have no contracts in their code, set the Contract Reference Assembly to "Do Not Build".
Then in the MVC project, have the Code Contracts "perform contract checking" checked. I had mine set to "Full".
Hope that helps somebody.
This sounds less like a Contracts and more like a build/config issue. Have you tried to deploy a prebuilt website? Are you sure that your website code sees the contracts code? Is the ASP.NET runtime using the CLR 4.0, or does it see the earlier Microsoft.Contracts.dll? Etc.
We have consumed a third party web service and are trying to invoke it from an ASP.NET web application.
However when I instantiate the web service the following System.InvalidOperationException exception is thrown:
Method 'ABC.XYZ' can not be reflected.
System.InvalidOperationException:
Method 'ABC.XYZ' can not be reflected.
---> System.InvalidOperationException: The XML element 'MyDoc' from namespace
'http://mysoftware.com/ns' references
a method and a type. Change the
method's message name using
WebMethodAttribute or change the
type's root element using the
XmlRootAttribute.
From what I can gather there appears to be some ambiguity between a method and a type in the web service.
Can anyone clarify the probably cause of this exception and is there anything I can do to rectify this or should I just go to the web service owners to rectify?
Edit: Visual Studio 2008 has created the proxy class. Unfortunately I can't provide a link to the wsdl as it is a web service for a locally installed thrid party app.
I ran into the same problem earlier today.
The reason was - the class generated by Visual Studio and passed as a parameter into one of the methods did not have a default parameterless constructor. Once I have added it, the error had gone.
It seems the problem is down to data type issues between VS and the web service that was written in Java.
Ultimately it was fixed by manually editing the class and schema files that were created by VS.
I have come across the exact same problem when I was consuming a 3rd party web service. The problem in this instance was that the mustUndertand property in the reference file was looking for a Boolean, whereby the namespace property looked for a string.
By looking through the reference i was able to idenitfy the offending property and simply add "overrides" to the method signature.
Not ideal as any time you update the service you have to do this but I couldn't find any other way around this.
To find the reference file select "all files" from the solution explorer
Hope this helps
I'm guessing the wsdl emitted by or supplied with the service is not in a form that wsdl.exe or serviceutil can understand - can you post the wsdl or link to it?
how are you creating the proxy classes?
Also you might like to try and validate the wsdl against the wsdl schema to check its valid
In my case I was getting a "method cannot be reflected" error due to that fact that in the class being returned by method, I had failed to expose a default parameter-less constructor.
I was working in VB.NET. In my return class I had declared a "New(..)" method that took a couple parameters (because that is how I wanted to use it in my code). But by doing so, I had supressed the default (hidden) parameterless New() constructor that VB adds behind the scenes. Apparently the web service handler requires that a parameterless constructor be available. As soon as I added back into my class a parameterless New() constructor, it all worked fine.
I got the same message but mine was caused by a missing System.Runtime.Serialization.dll since I tried to run a 3.5 application on a machine with only .NET 2.0 installed.
I had the same issue but I found that one of the WebMethod parameters has a member that is of type interface that is why VS could not serialise it. here is the exception when trying to download the disco file
System.InvalidOperationException: Cannot serialize member
'Leopard.JobDespatchParameters.SendingUser'
of type 'Leopard.Interfaces.IUser', see inner exception for more
details. ---> System.NotSupportedException: Cannot serialize member
Leopard.JobDespatchParameters.SendingUser
of type Leopard.Interfaces.IUser because it is an interface.
Old thread but I had a different issue, Maybe of help to someone. referenced dlls were mixed up between two versions on data layer and service layer that caused the problem.
Another scenario where this error can happen: I simply had another web method with the same name (but different parameters)in my web service that slipped in during a code merge. After I deleted the old method it worked.