while my first .net steps I want to understand and test the Method
Private Sub MyApplication_UnhandeledException in ApplicationEvents.vb.
But if I throw an exception the IDE stops and says "unhandled exception" and gives solution tips.
Is it possible to switch off those exception warnings and run through the unhandeled exception handling in ApplicationEvents.vb ?
I have purchased Microsoft Visual Studio 2010 Premium with MSDN.I have started to work on an application using .NET Framework 3.5. Everytime when an error occured the application stoped to run and marking the point when the error ocured. After some month this thing is not happening anymore. Instead of that the application
View 2 Replieswhen jit debugging is enabled any unhandled exception will be sent to the jit debugger registered on the computer rather than behandled by this dialog box so access to the path 'c:/a.text' is denied . it pops up all the time while im on here. whatr do i need to do?
View 2 Repliesactivating just In time (JIT) debugging-- I have a propmt that I have an unhandled exception in my application (??).
View 1 RepliesIt 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:
View 1 RepliesI 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.
1) How is ON ERROR GOTO -1 used? I don't understand the help text.
2) ON ERROR seems to be deprecated. What is the recommended Try...Catch replacement for ON ERROR RESUME NEXT. ie. where I have a series of commands, any of which may throw an exception, and I want to ignore all exceptions yet attempt every command?
I have written a VB.NET 2.0 code and in my code i am calling class.Showdialog and for that i am getting thread exception. I have mentioned the call stack of the exception. Can any one help me out to resolve this issue. [code]
View 5 RepliesAssume you have the following code:
Instead of doing:
Try
'
[code].....
I'm not getting any errors, or anything I just forgot how to do error checking in the "set" portion of properties
I have 3 Classes, my frmMain,Sales and a Validator Class
Code for the Validator Class:
CODE:
Code for my Sales Class:
CODE:
I need to Throw an Excepton when the Sales price is Zero or negitive and when the trade in allowance is negtive I'm not quite sure how to do that in the Object Oriented Manner.
If I have an existing exception object (I'm not in a catch block, I just happen to have been given an exception object), is there any way (re)throw it while preserving it's stack trace?
The context for asking is that I'm writing a RunWorkerCompleted handler. If an error happened while running the background task, then this will have shown up in the Error property of the RunWorkerCompletedEventArgs. To keep the code simple I want to use the same error handling code to trap this, or any error that happens later during the handler. That means I need code like this:
Private Sub OnDone(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs)
[Code]...
I don't think that using an InnerException here (ie. saying something like Throw new Exception(ex)) will work because then I have the problem that my Catch block has no way of knowing whether the exception it's supposed to be handling is the outer one or an inner one. StackOverflow seems to have various similar questions, but I've not found anything that describes this particular situation.
When I print to the printer, using the PrintDocument, I want it to be able to throw an exception if there is a problem. Currently, if I print to a printer that has a jam, is offline, or doesn't even exist, VB still thinks it printed fine. I never get an error. How can I have the printer report back to my program so that if I print to a printer that doesn't even exist, it wont let me do it? I just tried adding a LPT1 printer to my computer (and there is no local printer). I called it some random printer and installed some random driver. Then used my program to print to that printer and never got an error.
View 1 RepliesI want to throw error, if i used methods from this namespace System.IO
For example,
If i write File.Delete("TempPath") , i have to throw undefined Method..
Having problems with null dates in a mysql table. Have eventually found out that I can store a 'null' date in mysql as "0000-00-00" and I can run the 'insert' command to add a record to the mysql table. When I check on mysql workbench I can see the row has been inserted correctly and the date shows as "0000-00-00".However...When I try to load the table into a datagridview, I get an error = mysql Conversion Exception was unhandled = "Unable to convert MySQL date/time value to System.DateTime".
View 4 RepliesDebugging Error "NullReferenceException Was Unhandled'. I have the following code on my form
[code]...
I was scripting a very basic process manager, with a ListView component, and it was working fine for many days, up until now.Here is the code for getting processes:
Dim Process As New Process()
Dim Count As Integer = 0
ListView1.Items.Clear()[code].....
The line of code where I put "*WIN32 EXCEPTION LINE* keeps running into an error(Win32 Exception was unhandled; Access is denied). Here is the full error description:
System.ComponentModel.Win32Exception was unhandled
ErrorCode=-2147467259
Message=Access is denied[code]....
As I said before, this had been working for several days, up until now.
I have below program that throw exception. Do you know how to fix??
Dim conn As New SqlCeConnection
conn.ConnectionString = "Data Source=" & Dir & StockTakeFile & ";Persist Security Info=False"
conn.Open()
Dim cmd As New SqlCeCommand("select * from TableStockTake", conn)
Dim reader As SqlCeDataReader
reader = cmd.ExecuteReader()
[Code]...
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]....
I'm testing my Visual Basic .net application by running it in Visual Studio express.Sometimes it runs OK, but other times I get an exception (details below, if useful). I'm not sure why I get the exception as the particular part of the application that I am testing re-uses code that works OK for other features.
What should I check, what would give me a hint as to the root cause. Things I tried so far are: Rewriting some of the code to be more robust. The outcome of this was that this approach was getting out of control - I was correcting everything. I made changes such asing alternative libraries (e.g. replacing CInt with convertTo etc). Some lazy declarations, but it occurred to me that there was no problem with these with the code before my changes. And every change I seemed to solve uncovered yet another problem, another different exception So I thought something must be fundamentally wrong with my installation, and a search found discussion group posts from people experiencing something similar. The suggested remedy would be to re-install the .net framework. So I did that and the problems still occured.
Any thoughts on approach to get to the root of the problem? I'm not asking for a solution but some fresh ideas would be very welcome.
[Code]...
'Pankaj Pande
'IS 622
'AVL Tree Assignment
[Code]...
[code].....
I m getting an error NullReference Exception was handled at this line of code
Dim snmp As New SimpleSnmp
snmp = New SimpleSnmp(host, community)
I got an out of memory exception in a photo editor thingy i was making in vb.net. The bitmap image is constantly changing, and I always Dispose() of it after it has been sent off to the other bitmap. Is it being stored in a temp folder and using up all my space on the computer, or what? It always bugs after about 8 bitmaps have been drawn.
View 2 RepliesI keep getting out of range exception when I run my code in vb. It says that
HslSubj = Struktur(PosKt - 1)
is out of range exception unhandled..
But if I delete that I get a new error, which is argument exception. I put my whole code below..
Public Class FrMain
Public KDasar(0 To 9, 0 To 1) As String
Public Imbuh(0 To 4, 0 To 1) As String
Public Struktur(0 To 3) As String
Public DesStruktur(0 To 3) As String
[Code] ......
Here iam trying to insert some values to SQLServer 2005 Database.The following error displaying.I changed the corresponding column size,still the error persists.how can i sove this error-:
'String or binary data would be truncated. The statement has been terminated'
iam trying to insert some values to SQLServer 2005 Database.The following error displaying.I changed the corresponding column size,still the error persists.how can i sove this error-:
View 4 RepliesI have the following sub where i am reading in a 250mb file of dictionary words in a list, for example
Aardvark
Because
Count
[Code]....
As you can see i am wanting to use linq to remove duplicates, and also because i want to use the union and except statments elsewhere.
The above is fine if the filesize is about 150mb but with 250mb it throws a out of memory unhandled exception, on 'sWriter.Writeline(sline).
I am thinking this would need to be inside the loop, but cant work out how include my linq statement also.
I was doing my project and came across an error (The I/O operation has been aborted because of either a thread exit or an application request) regarding this
"Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
If closingdown = False Then
received = SerialPort1.ReadTo(vbCr & "R") 'Motion port receiving data. needs a vbCR & "R" is sensor out is an ASCII "R" followed by three characters (which is the distance measured)
End If"
I'm writing some code in which I need to use my own HttpResponse object to capture the output from a method on another object that takes an HttpResponse as a parameter. The problem is, this other object (which I cannot modify) calls HttpResponse.End(), which causes an "Object reference not set to an instance of an object" exception to be thrown. What can I do about this?
Dim myStringbuilder As New StringBuilder
Dim myStringWriter As New IO.StringWriter(myStringbuilder)
Dim myResponse As New Web.HttpResponse(myStringWriter)
[code].....
I have a desktop application in vb.net 2003. Here when we load the main screen we find an unhandled exception showing out of memory, but we are able to continue working off the form and retrieving data. It works fine, but the image is not getting loaded.In the main screen we have a background image loaded, one of the images is animated
View 1 RepliesI have the following code, which is meant to loop through a list of CheckBoxes and if checked if gets the text contained in the linked textbox through the tag of the Checkbox, i have used it before and it worked fine but this time i am getting the following error:
Null Reference Exception was unhandled
Dim DisCheckBox As CheckBox() = {chk0_6, chk6_12, chk12_18, chk18_24, chk2_3, chk3_4, chk4_5, chkXSB, chkSB, chkMB, chkLB, chkXLB, chkS, chkM, chkL, chkXL, chkXXL, chkXXXL, chkXXXXL, chkW8, chkW10, chkW12, chkW14, chkW16, chkW18, chkW20}
For Each Chk In DisCheckBox
[code]....