I have a VB.Net program written with .Net 2.0
I'm trying to write a code that logs entire registry entries into a log file.
I have got it to work wit the following code.
http://pastebin.com/kmA63cUe
However whenever I try to add an additional Registry key to log
LogPrint4("<-----------------HKLM/WebCheck-------------------->")
If reg.enumvalues(&H8000002, "Software\Microsoft\Windows\CurrentVersion\WebCheck", keys2, types) = 0 Then
If IsArray(keys2) Then
For p = 0 To UBound(keys2)
reg.getstringvalue(&H8000002, "Software\Microsoft\Windows\CurrentVersion\WebCheck", keys2(p), value)
LogPrint4(keys2(p) & "=" & value)
Next
End If
End If
It comes up with the following error
COMException was unhandled Check the ErrorCode Property of the
exception to determine the HRESULT returned by the COM object.
I'm not sure why it is limiting it only to 5 checks.
Anyone have any ideas?
Consider using the built-in Registry support instead of the COM libraries. At a minimum, you'll get clearer error messages. It is supported in .NET 2.0.
http://msdn.microsoft.com/en-us/library/microsoft.win32.registry(v=vs.80).aspx
Good luck!
Related
Trapping Excel COM errors from a VFP program.
A program is writing out an extract from several large tables to Excel using Automation.
Typical instructions include :
lCell = "I1234”
.sSheet1.Range(lCell).value = cCust.Name
This generally works fine, but if cCust.name has a value such as ‘=’ (which Excel does not like), this causes an OLE COM error.
Had tried using TRY .. . CATCH . . . ENDTRY to trap this error, but the OLE COM error still reports.
I suppose that I could find out all the possible errors in the data and clean them up, but is there any way of getting Automation to ignore the error and carry on (leaving the field unpopulated)?
Thank you.
I am adding this as an answer, since it contains some code that would otherwise cause a mess. With ON error it is working perfectly fine for me. ie:
*** Constant Group: XlSaveAction
#Define xlDoNotSaveChanges 2
#Define xlSaveChanges 1
Local loExcel As Excel.Application
Local lcValue
loExcel = Createobject('Excel.Application')
loExcel.Workbooks.Add()
loExcel.ActiveWorkbook.SaveAs('c:\temp\ExcelReadTest.xlsx')
loExcel.DisplayAlerts = .F.
*loExcel.Visible = .T.
On Error lcValue = .Null.
With loExcel.ActiveWorkbook.ActiveSheet
.Range('A5').Value = '=Like me'
lcValue = .Range('A5').Value
? m.lcValue
Endwith
On Error
loExcel.ActiveWorkbook.Close(xlSaveChanges)
loExcel.Quit()
I am trying to add pst store from outlook addin using Redemption with the code:
RdoSession = Redemption.RedemptionLoader.new_RDOSession();
RdoSession.MAPIOBJECT = (AddinModule.CurrentInstance as AddinModule).OutlookApp.Session.MAPIOBJECT;
string path = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + #"\Microsoft\Outlook\mystore.pst";
RDOStores stores = RdoSession.Stores;
RDOStore store = stores.AddPSTStore(path, Outlook.OlStoreType.olStoreDefault, "test");
Line stores.AddPstStore throws System.Runtime.InteropServices.COMException (0x8000FFFF): Catastrophic failure and it creates mystore.pst in correct location with the size of 265 KBs. New store/data file is not displayed in outlook and it does not apear in RdoSession.Stores on next execution. So my program tries to create it again (since it didint found it) and then same line crashes with:
System.InvalidCastException: Error in IMsgServiceAdmin::AdminProviders: MAPI_E_INTERFACE_NOT_SUPPORTED
Using office PIAs code works without any problems:
https://msdn.microsoft.com/en-us/library/office/bb612380.aspx
I would keep redemption code since there is much more logic around it. I just moved these 5 lines to the begining of function to isolate the problem.
MAPI has a few marshaling bugs in the profile management interfaces (such as IMsgServiceAdmin).
Try to replace setting the RDOSession.MAPIOBJECT property with calling RDOSession.Logon.
Is you code running in a Outlook addin or a standalone app?
I have the following vb.net code:
Imports IBM.WMQ
[...]
MQEnvironment.Hostname = hostName
MQEnvironment.Port = portNumber
MQEnvironment.Channel = channelName
queueManager = New MQQueueManager(queueManagerName) ' error here
which is throwing the following error:
System.IO.FileNotFoundException occurred
FileName=C:\Users\User\Documents\Visual Studio 2012\Projects\[...]\bin\Debug\mqclient.ini
HResult=-2147024894
Message=Could not find file 'C:\Users\User\Documents\Visual Studio 2012\Projects\[...]\bin\Debug\mqclient.ini'.
Source=mscorlib
StackTrace:
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
I am not using any ini files in the construction of my queue manager, so does anyone have any idea what's going on - why is it even looking for one, and why in the same directory as the program? I have installed the MQ client, and afaik I have all the environmental variables, etc. set up properly.
Thanks for any help you can give
Is that an unhandled or a first chance exception? Internally, the MQ .net layer will try to read a MQClient.ini but should function quite happily without it. It reads the file for compatibility with the C client, and can handle some of the MQClient.ini stanzas. I would not have expected an absence of such a file to cause problems, but it will try to open it internally. Was that the full callstack, as I'd have expected some MQ libraries on the stack otherwise.
Using Visual Studio 2008 and generating .net 2.0 framework with VB.net for a web application.
I encountered a very strange problem currently. After I build a solution and click a link in a web page, I got an error message as following. The same thing happened when I tried to run in debug mode.
*************************************** ERROR Message ******************************************************
"An exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll but was not handled in user code"
"Additional information: Operator '=' is not defined for type 'DBNull' and string "". "
*******************************************************************************************************************
The problem part is simply as below in a vb file. The value of dataview(0)(“name”) is NULL and my_name is a variable string. The strange is thing I didn't change any code in this vb file. This vb file was built previously and used for a long time ago without any problem. It just suddenly happened today. I have this syntax all over the program without causing any problem. I have tried to restore the whole solution back to original but still have the problem.
Can anyone please advise why all the sudden and how to fix?
If dataview(0)(“name”) = my_name then …
Try to determine NULL value first ..
If NOT IsDBNull(dataview(0)(“name”)) Then
If dataview(0)(“name”) = my_name then
'codes here
End If
End If
I have coded up a cleaner type of program but getting a huge error with permissions ( I think )
The error message is printed out like so.
An unhandled exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll
Additional information: Access to the path 'C:\Windows\CSC\v2.0.6' is denied.
And it says that the error part of the code is this line
For Each fi In DirectroyInfos.GetFiles(filter)
But here is the fill block of code.
For Each fi In DirectroyInfos.GetFiles(filter)
Try
file_count = file_count + 1
file_size = CULng(file_size + fi.Length)
FilesToDelete.Add(fi.FullName)
Catch ex As UnauthorizedAccessException
'There's really no pretty way to handle this exception
Catch ex As FileNotFoundException
'There's really no pretty way to handle this exception
End Try
I think it's some sort of permission problem I have windows 7 and have noticed there are a lot of run has admin problems.. I think its trying to remove or gain access to a file which it does not have permission to get .
Is there anyway to fix this? Am I missing something in my coding?
As you said in your question, you don't have write access that file.
Either skip files you don't have access to, or run the application as admin.
There appears to be a limitiation with the win32 api that will skip all files in the folder if you do not have access to one of them.
Check out this solution from Microsoft Connect:
How to: Iterate Through a Directory Tree (C# Programming Guide)