Stop A Program During Execution Any Other Way Than By Throwing An Error?
Aug 19, 2009
Is there a command that will stop the execution of my program?
I have a service that is processes an exchange account via telnet every 10 minutes. During one point of execution the application could possibly have a response from the telnet session when there are NO e-mails in the folder, which would look something like this[code]...
So is it possible for me to just stop my application at that point since there's no point in continuing if there are no e-mails in the account?
View 8 Replies
ADVERTISEMENT
Jun 15, 2011
I have written a converting program, which converts binary files to ASCII files. (VB.net 2010). I need to have a functional "stop" button on the form and I was wondering if there was a simple command to make a program stop, exit all procedures, and wait for user input on the form.
It is not feasible to multithread this application, as it frequently interfaces with the form. Currently, I have a global boolean variable which becomes true if the stop button is pressed, and I have internal loops checking to see if the variable is true. However, I don't to waste CPU on checking a variable if it's not necessary.
View 5 Replies
Nov 28, 2011
It worked fine till i applicated some conditions... Now my form execution stop right after a ExecuteScalar.[code]
View 2 Replies
Feb 6, 2012
How can I completely stop code execution?
Also, how can I hide a form and keep all information saved so I can bring it back up again?
For instance, I have form1 with "alpha" written in a textbox. Now when I hide form1 (Me.Hide), I would like to be able to bring form1 back with "alpha" still written in the textbox.
Currently, I hide it, and when I show it again, the textbox is empty.
View 10 Replies
May 11, 2012
I need to stop the execution of a program in VB.net. Within a repeating structure the program checks whether a variable is true or false. When the variable is false I need to stop the program execution. I do not want to close the program but simply stop it. One way I found was raising an exception, but I would not want to display the error message to the user. What is the best way to do it ?
Do
If myvariable=false then
throw new exception... 'Silent exception
end if
Loop until ....
View 3 Replies
Dec 31, 2010
I want to stop the execution of my .net application for about 20nanoseconds
so i am trying to measure time needed for specific samples of code, and i want a code that takes only 20nanoseconds
View 17 Replies
Sep 14, 2009
my application has integrated an external library with long running math-evaluations. It happens that some calls to functions in this library start but do never come to an end.
Unfortunately I have no chance to look examine the behaviour of the library. So I got the idea to stop my function calls to the library after a timeout.
Has anybody an idea how to manage this an to control the execution of a function, i.e. to stop it hardly after a certain time?
View 1 Replies
Aug 19, 2009
I have a vb.net application that uses threads to asynchronously process some tasks in a "Scheduled Task" (console application).We are limiting this app to run 10 threads at once, like so:
(pseudo-code)
- create a generic list of 10 threads
- spawn off the threadproc for each one
- do a thread.join statement for each thread to wait for the longest running one to complete.
What i am finding is that if the code called by the threadproc contains any "Debug.Writeline" or "Trace.Traceinformation" statements, the thread hangs. I can see the thread in the Debug - Windows - Threads window, and switch to it, but it highlights the debug.writeline statement and never gets past it. is there something special about the Debug or Trace statements that make them non-thread-safe? Any idea why this would hang things up? If I leave the debug statement in, the thread never completes. If I take the debug statement out, the thread completes in less than 5 seconds.
View 3 Replies
Nov 24, 2009
I am checking to see if a textbox contains a number, or is null. If it is non numeric or null a message box appears asking the user to input the proper value. When the user clicks OK on the msgbox the program will continue to execute the code. I want it to stop executing the code and revert back to its default state as it would be if you just opened the program. What is the command for doing this so I can add to the if statement?
Dim numCheckV as boolean
numCheckV = IsNumeric(Vinput)
If numCheckV = False OrElse TextBox1.Text = "" Then
MsgBox("Please enter voltage!")
End If
View 3 Replies
Apr 22, 2011
I am working on an app and I am a bit confused w/ threading. I understand the point of threading but I am not getting when to use a background worker thread vs. a standard thread vs. a thread pool. Can someone shed some light on when to use which? Right now, I am trying code an app that does stuff initially in a sequential order and then eventually must thread (otherwise it takes forever). The problem I am having w/ the sequential stuff (and threading later) is that I need a button to be able to stop execution of code. [Code]
I did the background worker on this first sequential operation because when I tried w/ out it, the text box didn't update at all until the web page contents were retrieved. Basically, the text box change of "Starting." doesn't show up until the web page is finished processing even though the assignment to the text box happens before that code.
View 11 Replies
Feb 26, 2012
Is there any way to stop the execution of the code that's under a button if for example a certain condition is met?
View 5 Replies
Jan 20, 2010
I�m having trouble with my VS. It gives me the error "insufficient memory to continue the execution of the program". This is a dangerous error because I cannot save the project either. So all work is for nothing. Actually VS destroyed my mainform at one time due to this error.
Now there shouldn�t be anything wrong with the computer or the project. The computer is new and with ok performance. The program runs ok on other computers (up to 5 yrs old) both published and in debug. On the old computer I use VS express, on the new I have Pro.
I think it has something to do with the graphics (I have added one or two pictures to the project since testing it on the older computer). VS graphics really doesn�t work like it should.
I have a mainform (the one that got destroyed) which I want to use as a MDI container. I want to have a picture as background. That doesn�t work (!) so I use a picturebox instead. When showing childforms the idea is that som part should be transparent, thus showing the MDI�s background.
In debug, as well as after publishing, the result is the MDI shows, and it actually has the picture as background. However the childforms don�t show at all. They show up in the window toolstrip though. Needless to say I cannot save the project because of the memory issue.
So, am I right in assuming that VS cannot handle a simple .bmp picture, or what should I do to be able to continue developing?
View 4 Replies
Feb 22, 2011
The following code is throwing Exception. I don't get what mistake I am making in the code. i think it is of some security rights issue. If so, how can I give the security rights to any user or application to access this windows service programmatically?
Dim sc As New ServiceController
sc.ServiceName = "DataLoad"
If sc.Status = ServiceControllerStatus.Stopped Then
[code]....
View 1 Replies
Feb 27, 2012
I have a question about how to properly deal with errors. I am working on a three tiered application. If an error is created on the data tier, I would like to pass the error to the business tier and process it there.What is the best method to accomplish this? I am using .net 2.0 and visual studio 2005.
View 1 Replies
Apr 23, 2010
Why would my try-catch block still be throwing an error when it's handled?[code].......
View 8 Replies
Mar 4, 2012
Can someone please explain to me what this error means? I am new to VB programming and don't understand this. Error : Type 'var' is not defined
Here's my code
[Code]...
View 4 Replies
Mar 22, 2011
My code block is below. As it turns out, rdrCurrentRate.GetString(12) is a null value, but the code block throws an error. "Data is Null. This method or property cannot be called on Null values."My intention is to write "if rdrCurrentRate.GetString(12) is NOT NULL, then sCurrentRateType = rdrCurrentRate.GetString(12)"
What am I missing here?
If Not String.IsNullOrEmpty(rdrCurrentRate.GetString(12)) Then
sCurrentRateType = rdrCurrentRate.GetString(12)
[code].....
View 3 Replies
Sep 7, 2010
I cant see what is wrong with my SQL statement syntax [code]...
ERROR [42000] [MySQL][ODBC 5.1 Driver][mysqld-5.1.41]You have an error in your SQL syntax;check the manual that corresponds to your MySQL server version for the right syntax to use near 'Int,Agi,Money) VALUES('MyUsername','MyPassword',0,0,0,0)' at line 1
View 1 Replies
Oct 7, 2010
I'm passing in a sql command such as "EXEC StoredProc 0" into a a function called ExecMyCommand where StoredProc is a stored procedure taking a parameter of 1 or 0.It works fine with the following code.I had tried to judge success by looking at NumRowsAffected but soon realized that the -1 could represent a successful run even if -1 was the return value.So then I changed the code and return mLastRunOutcome = False if there is an error.So for testing I changed the name of the SP to like StoredProc2 in the database and ran the same command "EXEC StoredProc 0" and to my amazement, no errors were thrown in the code below..Of course ran the same command in Query Analyzer and it barked that there was no SP by that name.How do I know when a command ran successfully or not in code here? and Why didn't the ExecuteNonQuery throw an error when the command was not right??[code]
View 2 Replies
Apr 18, 2011
I am trying to read all selected items from a listbox in Visual Basic.
Dim x As Integer
Dim testValue As String
testValue = "20"
[code].....
View 1 Replies
Mar 28, 2011
When calling API's or other external functions it is only possible to get thrown errors using "GetLastError". I made the following function for this:
[Code]...
View 5 Replies
Apr 8, 2010
I'm developing a mobile website using vb.net but having set my tools right as I read somewhere, I've having an object reference...null error from the sqladapter line. I'm trying to authenticate by checking the db for username and password and granting or denying access asthe case maybe, [code]
View 6 Replies
Mar 23, 2012
I have been trying to assign value to an object array that is defined as follows.Dim englishTextAry As Object(,) = New Object(,) {}I am looping through a dataReader and trying to assign the values to this array with the following code.[code]But the ReDim is throwing an error on dataVal not being an Integer.What am I doing wrong here? Can anyone point me in the right direction?
View 2 Replies
Nov 10, 2010
I never got into detailed error processing too much when I played in VBA/VB6 a lot. Mostly then, if you ran into a user error (such as some input of theirs failing a validation test of some kind), you popped a MsgBox() with some error information and the critical (or warning) icon, and safely aborted out of the code
In .NET, my reading basically points to exceptions as the end-all in error handling. It looks to me that if you know a spot of code where a user can screw up, you're supposed to catch it with either try...catch blocks (for things like data conversions), or standard if...the...else constructs for other things, and then throw a new exception if needed.
Isn't throwing an exception essentially a forced crash of a program in a sense (granted, you get the option of continuing)? Or are exceptions geared specifically for things like data conversion errors and other "things that shouldn't happen", and resume use of MsgBox() and friends for minor user screwups?
Consider the case of where you have a TextBox that is only supposed to accept numeric data (or heck, just a specific set of characters). Barring some other trick that lets you restrict that field (let's just assume it's freeform, programatically), it would seem a bit of a waste to throw new exceptions everytime they type in an invalid character, or even if the error checking doesn't happen until they press a submit button (like on a webpage). Popping a MsgBox() seems more sane in that case.
So what's the straight dope on exceptions and throwing new ones on user errors? How about if your program also exposes a programmatic framework? Bad usage of one of the programmatic functions definitely seems like new exception territory to me.
View 1 Replies
May 23, 2010
Number of downloads: 81This program is supposed to calculate the ever popular mortgage payment and amortize the loan in a list box. I keep throwing this error "Missing Member Exception" and can not find out how to fix it anywhere. Because of the error I can't even see if I can even get a calculation in the text box, let alone if the amortization will run. The purple text is where the exception is.
Public Class HarlessSmithIA3
Dim LoanAmt, Int, Result, Term As Double
Dim txtIntRate As New Object
Dim txtLoanAmount As New Object
Dim txtLoanTerm As New Object
Dim txtMonthlyPayment As New Object
[CODE]...
View 10 Replies
Jul 21, 2011
I like to clarify the doubt regarding vb.net programming. my question is as follows.1. While executing the vb.net program, whether it takes RAM space or Hard disk space.
View 4 Replies
Nov 1, 2009
I am trying to make an application with a start button and a stop button on a stop watch program. These are the codes I am using but my seconds on the stop watch don't start.
Public Form Dim intSecond As Integer = 0
Form 1
Private
Dim intSecond As Integer = 0
intSecond +=1
[Code]...
After I write my code and try to run the program, the seconds will not start,
View 3 Replies
Oct 20, 2010
I am executing a SQL Server 2000 DTS package using C# by following the code from this article [URL]. once the package is executed I am looping through each step to find out if any step has failed and get info about error if it has failed. I also use this information to find out if the package has succeeded or not (package failed if anyone step has failed).
[Code]....
View 1 Replies
Nov 25, 2010
I'm attempting to display records on the screen 30 records at a time. When totrec is greater than 31, I was hoping the program execution would stop at the line "btn30to60.Focus()".Instead, execution continues and the sub "between31and60" is executed.If anyone has a simple way to halt program execution until the user clicks on the button "btn30to60"
Code follows:
If totRec > 30
And totRec < 61 Then
Call lessthan31()
[code]....
View 3 Replies
Dec 27, 2009
VB.NET: What is the best way to ensure that a particular object may be instantiated only once during program execution?
View 3 Replies
