Catch An Exception Generated On Another Thread?

Jan 15, 2011

How do you catch an exception generated on another thread

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Error 68 'Catch' Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception' Because It Is Not 'System.Exception'

Feb 12, 2010

I am using VB.NET 2005 to create a Windows forms application. I have a procedure named SendMail that creates an instance of Outlook.Application, to send an email from my application. I found the code on this forum, I think.The procedure works fine, but I can't use error handling with it.I call the procedure from a button click event. I put the procedure call in a try/catch block, and the application won't build, with the following error.

Error 68 'Catch' cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. C:datadevdmtiQTSQTSv7_1_20100212wQTSQTSReportsCriteria
pt_frmReportViewer.vb 43 21 QTS

Here is the code:

Sub SendMail(ByVal sFile As String)
' Create an Outlook application.
Dim oApp As Outlook._Application

[code]....

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Catch' Cannot Catch Type 'Object' Because It Is Not 'System.Exception' Or A Class That Inherits From 'System.Exception'

Aug 10, 2010

I'm getting 'Catch' cannot catch type 'Object' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. and 'Expression detected' Code underlined in blue: Catch obj1 As Object When (?)

Private Sub OpenJAMem()
Dim num3 As Integer
Try

[code]....

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'Catch' Cannot Catch Type 'exception' Because It Is Not 'System.Exception'?

Apr 16, 2012

I have a project converted from Visual Studio 2005 to Visual Studio 2010. It compiles and runs.

When I prune "unused references's from this project as listed by Visual Studio, the project fails to compile with the subject error message.

In particular one of the "unused refererences" is to "Microsoft.VisualBasic.dll". The IDE does not allow me to add back this particular reference.

What do I need to add back as a referenceto get this items?

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Error - Catch Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception'

Mar 25, 2011

I have a program in VB.Net that receives mails from Outlook, extracts attachments and inserts the attachments into a table through a query. I would like to put the query/queries in a Try/Catch block, but cannot do so as Outlook exceptions cannot be caught, and it gives me an error, and unless I put a very specific exception, I cannot catch it. Is there a workaround?

Edit:

Try
Catch ex As Exception
End Try

Exception is underlined and when I hover on it, it says: "Catch cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not in 'System.Exception' or a class that inherits from 'System.Exception'". This is affecting all my other code which I'd like to put into a Try/Catch block.

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Nested Try...Catches - If An Exception Occurs In The 2nd Sub's Try...Catch, Which Catch Gets Excecuted?

Mar 4, 2009

I have this scenario: in a Sub I have a Try...Catch statement.Within that Try..Catch I call another sub.In that 2nd sub is also a Try...Catch.(see below for example).Now if an exception occurs in the 2nd sub's Try...Catch, which Catch gets excecuted? The 2nd one, the 1st one or both?

Private Sub sub1()
Try
..do stuff[code].....

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If Throw An Exception From Within A Catch, Does The Finally (from The Catch) Still Execute

Jun 2, 2009

If I throw an exception from within a catch, does the finally (from the catch) still execute? i.e.

Try
..some code with an exception in it...
catch ex as Exception
throw new SpecialException("blah blah" & ex.Message, ex)

[code]....

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Catch An Exception And Throw A New Exception Which Wraps The First Exception As An Inner Exception

May 8, 2009

It is possible to catch an exception and throw a new exception which wraps the first exception as an inner exception: [URL] Also, if I call a function and it throws a certain error, but I catch it, will the calling code's catch handler execute? If so, and it is of a higher exception type, is this not wrapping the exception? eg I can throw exception ex of type IndexOutOfRange, log it but rethrow, catch a higher up exception and do something, or I can throw a new exception and wrap an inner exception like:

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Get All Primary Keys Which Generated Exception From Sql Exception Object

Feb 10, 2010

I have written a program which uses a SQL exception class and then use it show custom messages for the primary key violation. Also i want the primary key value that caused the violation. How can i get all the primary keys which generated the exception from the sqlexception object.[code]

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Catch The Error generated By Application

Sep 8, 2010

I have written another windows application A. I then use another application B using process to run the application A. My main problem is to catch the error generated by application A so that application B can then perform some actions.

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.net - Re-throwing An Exception From An Exception Catch?

Feb 14, 2011

catch an exception and then throw another exception? Like so:

Try
' Do operation xxx
Catch ex As Exception
' Operation xxx failed, need to execute cleanup

[code]....

The reason for doing this is that while I catch my exception on a higher level logic (to make sure I can log it properly), I need to do some actions in the event of the exception that I can only do inside my class/function.

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Cross-thread Operation Not Valid Exception In Single Thread Application?

Nov 14, 2009

I am getting this exception: Cross-thread operation not valid: Control 'TextBoxOutput' accessed from a thread other than the thread it was created on. in a VB 2008 Windows Forms application that I havent specifically made multi-threaded. I have create a sub called Out() like this:

Private Sub Out(ByVal inString As String)
Me.TextBoxOutput.Text += (Me.TextBoxOutput.Text & inString & vbNewLine)
Me.TextBoxOutput.SelectionStart = Me.TextBoxOutput.Text.Length
Me.TextBoxOutput.ScrollToCaret()
End Sub

and I call it from various events to log messages I am getting from my pbx, which I use a third party open source dll to access. The interesting thing to me is that if I run the deployed application (ie, not in the VS IDE) I do not get any exceptions, it's only from within the IDE.if I add the line: Control.CheckForIllegalCrossThreadCalls = False to the form's constructor, the exceptions stop, but a) this seems like a hacky way to get around the issue and b) the application seems to hang sometimes when I have it set this way.

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Multi-thread Accessing The UI Thread Control, No Exception Thow?

Oct 11, 2011

As we know, one STA UI thread creats the controls only canbe accessed in the UI thread in Winform application. And we need to call control.invoke or begininvoke to run the code in the background thread.

Yes, below code in VB.Net , VS 2010 Winform project can throw the exception "Cross-thread operation not valid: Control 'Form1' accessed from a thread other than the thread it was created on."

[Code]...

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How To Keep Thread When Using A Try...catch Statement

May 28, 2012

My.Computer.Network.DownloadFile(URL, Path, ... etc.)
Catch

[code].....

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Catch Inner Exception In NET?

Oct 13, 2009

How can I catch an inner exception in .NET? I need to check 2 databases for a record. The database code throws an exception if a record is not found, so then I want to check the second database[code]...

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How To Catch Exception From DLL

Sep 8, 2011

I've written a DLL that contains a bunch of classes. One of my methods validates the contents of a file and throws any necessary exceptions based on invalid content - I'm using a standard "throw new exception." call the thing is, when my code reaches the line where the exception is thrown, my Visual Studio IDE hangs up on that line instead of the external call to my validate method.

[Code]...

So my IDE is actually pulling up the VB file that contains the DLL content and highlights the line in the ValidateFile instead of just hanging on the oFC.ValidateFile method line where the exception is thrown instead of the IDE hanging on the oFC.ValidateFile line in my calling application.

I just want user to have access to the any exceptions that are raised. Here if "C:FileThatDoesntExist.txt" file does not exist then Dll throw exception which should be catch through Application.ThreadException.. How to Catch exception from DLL ?

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How To Catch This Exception

May 1, 2012

System.Data.OleDbException (0x80004005): The changes you requested to the table were not successful because they would create duplicate values in the index, primary key..."I know how to catch all exceptions. But I want to catch THIS SPECIFIC ONE so I can call one of my subroutines to generate a different ID that will not violate the primary key.

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.net - Log With Asp.net HealthMonitoring An Exception That Was Catch?

Sep 2, 2011

I configured HealthMonitoring in my web application to log all exceptions in the database.But, when I gracefully handle some exception by showing a nice message to the user, they are not logged in the database.If I something like Throw ex, the standard error page is be displayed and the error is not gracefully handled.

Is there something else I could add at the end of my error handler to tell the system to also log this error?here an code sample:Dim errorText As String = "Doing Something"Try 'Do Something

[Code]...

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Catch Exception Only In Release?

May 28, 2010

I have one global generic exception handler(catch ex as Exception) for all unhandled exceptions from application.But in debug mode(app runs from VS) I don`t want that exceptions go to this global handler.Better for me is when VS stops app on place when exception occurs.

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Using Catch For An Exception That Does Not Occur

Mar 25, 2012

What is the code that I can use to describe what happens when there is not just one exception in a'Try...Catch..Finally...End Try' statement? For example: 'Catch' is used to describe what happens when a certain exception occurs, but what can I use to describe what happens when a certain exception does NOT occur?

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Catch / Handle And Then Again Throw Exception?

Jun 26, 2009

I ran into an interesting dilemna today. I have a function that handles information and checks for duplicate values, then returns the next number that is not a duplicate. So, I have something like this:

Public Function GetNextNonDuplicateNumber(NumberToCheck as Long) as Long
//the non-duplicate the function will return
Dim NonDuplicate as Long
'duplicate
If CheckForDuplicate(NumberToCheck) = True Then
Throw New DuplicateException()
[Code] .....

As you can see, I want to handle the exception specifically, but I also want to throw it when I'm done because I want to alert other code outside the function. The problem is that simply throwing it exits out of the function with a null value.

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Catch As Exception Error From Lblfeedback

May 11, 2012

i must receive that block of an error message from lblfeedback when it happens so i can sort out the problem before the phone rings. i have this block of code

[Code]....

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Exception Handling - Can't Catch COMException

Feb 24, 2012

I use the following code to access a VSS item:

Dim sItem As String = "$/MyVssProject/InexistentFile.txt"
Dim oItem As SourceSafeTypeLib.VSSItem = Nothing
Try

[Code]....

The problem I face is when I try to get an instance to a file that doesn't exist in the VSSDB, thus leading to a COMException, which basically wouldn't be of a problem (I would expect). In fact the exception occurs, but instead of proceeding with the catch code, the debug cursor stays on the line "oItem = m_oSourceSafe.VSSItem(sItem)", showing a dialog with title "COMException crossed a native/managed boundary.

From here the execution doesn't proceed, until I change the content of sItem to an existing file.

Why does the exception not get caught, and how can I achieve it?

Environment: VS2010 with .Net 2.0 on WinXP SP3 x86

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Thread Safe To Throw And Catch Shared Exceptions?

Jan 25, 2010

so i have a Method that is going to made Thread Safe. can i have something like this in the Method:

Public Class Q Private Shared ASD As New MyException("") Public Sub W Throw ASD if multiple threads attempt to throw the Shared exception ASD, will there be an error in the catching part? The alternative of course is to: Throw New ASD but i'm just checking to see if the first way is thread safe

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Catch 404 Error Exception On Web Browser Control

May 28, 2011

How can I catch 404 error on web browser control?

Try
TimeTable.Navigate("URL/File.htm")
Catch ex As Exception
TimeTable.Navigate("URL/File2.html")
End Try

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Catch An Exception Thrown By A Control Event?

Jan 21, 2011

How can I catch an exception thrown by a control event?I have a control that throws an exception in one of its events and I need to catch it but I don't know how.Consider for example that the text box control throws an exception in its click event. How can I catch such exception?

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Catch An Exception Thrown By JIRA SOAP?

Oct 17, 2011

I want to catch the exceptions thrown by the login() function in JIRA's SOAP API. The function login throws 2 exceptions. RemoteAuthenticationException if the user provided an invalid username or password and RemoteException if there was some problem preventing the operation from working. Currently I'm using this code to catch the exception

[Code]...

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Event Causing Error - Cannot Catch Exception

Apr 22, 2010

A developer has created a custom control in ASP.NET using VB.NET. The custom control uses a repeater. In certain scenarios, the rpt_ItemDataBound event is encountering a data error. My goal is rather than having the user see the yellow screen of death, give the user a friendlier error explaining exactly what the data error is. I figured I would be able to use a Try/Catch block as shown below throw the exception, however, it appears that the event has nowhere to be thrown to and stops executing at the "End Try" line.

Protected Sub rpt_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles rpt1.ItemDataBound, rpt2.ItemDataBound
Try
ProcessBadData...
Catch ex As Exception
Throw ex
End Try
End Sub

In VB.NET, I can find where the repeater's DataSource is being set, however, I can not find a DataBind event. How I can capture the exception in this ASCX control so I can report it to the user. The stack trace looks like this. There is another repeater within the repeater that is actually causing the error (rptOther) and I'm able to catch the error, but I can only throw it to the rpt_ItemDataBound. How rpt_ItemDataBound is getting called without a DataBind event.

at Company.WebForms.Control.rptOther_ItemDataBound(Object sender, RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.OnItemDataBound(RepeaterItemEventArgs e)
at System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem)
at System.Web.UI.WebControls.Repeater.CreateControlHierarchy(Boolean useDataSource)
at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e)
at System.Web.UI.WebControls.Repeater.DataBind()
at Company.WebForms.Control.rpt_ItemDataBound(Object sender, RepeaterItemEventArgs e)

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Exception Handling - Err.Number Versus Try-catch In .net?

Feb 23, 2011

I have inherited an old VB.net-project. The code mostly uses try-catch for error-handling. However in some places I have found If Err.Number <> 0 Then.If an error occurs, what decides if an Exception should be thrown, or just setting Err?I don't want to handle error both ways...

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Null Reference Exception In Catch Block

Oct 18, 2011

I'm trying to catch an invalid entry in a textbox that I use to enter numbers using the subroutine below.

In the Catch blok I want to change the ForeColor of the textbox that contains the invalid entry.

This did function but now gives me a null reference exception on the line where I change the ForeColor.

Private Sub SaveParm()
Dim Temps(2, 2) As Double
Dim Cname As String = "Text0"

[Code]......

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