Program Hangs On Loop
Jul 25, 2011my program seems to just freeze whenever I press this button. I need to be able to use this because I'm reading values from a joystick as i'm making a human interface device.
Why is this freezing?[CODE...]
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PhpMyAdmin MySql Database - Program Hangs In The For Loop Before The Variables Are Assigned Values From The Data Table
Jan 5, 2012I am using vb.net with phpMyAdmin MySql database. While running the piece of code below, the program hangs in the for loop before the variables are assigned values from the data table(dt)...
'Check for appraisal period-----------------------------------------------------------------------
Dim sqlCheckDate As String = "SELECT * FROM tblappraisalsetting where appSetID=(select max(appSetID) from tblappraisalsetting);"
[CODE]................
HTTPWebRequest For Loop Hangs Every 10 Or So Iterations
Jan 14, 2011I am trying to loop through an array and perform an httpwebrequest in each iteration. The code seems to work, however it pauses for a while (eg alot longer than the set timeout. Tried setting that to 100 to check and it still pauses) after every 10 or so iterations, then carries on working.
Here is what I have so far:
For i As Integer = 0 To numberOfProxies - 1
Try
'create request to a proxyJudge php page using proxy
Dim request As HttpWebRequest = HttpWebRequest.Create("[URL]")
request.Proxy = New Net.WebProxy(proxies(i)) 'select the current proxie from the proxies array
request.Timeout = 10000 'set timeout
[Code] .....
I have tried a using block, eg:
Using response As HttpWebResponse = request.GetResponse()
Using sr As StreamReader = New StreamReader(response.GetResponseStream())
Dim pageSourceCode As String = sr.ReadToEnd()
'check the downloaded source for certain phrases, each identifies a type of proxy
[Code] .....
Does the try catch statement automatically close the response, or do I need to put something in Finally? If so, what? i cant use response.close() because its declared in the try block.
RegularExpressions.Match Hangs In Infinite Loop?
Jan 18, 2012This code hangs in infinite loop. Any ideas why is that? Is that a bug in .NET? Can I do something about it?
Dim urlRegex As New
Regex("((?:[a-z][w-]+:(?:/{1,3}|[a-z0-9%])|wwwd{0,3}[.]|ftp[.]|[a-z0-9.-]+[.][a-z]{2,4}/)(?:[^s()<>]+|(([^s()<>]+|(([^s()<>]+)))*))+(?:(([^s()<>]+|(([^s()<>]+)))*)|[^s`!()
[code].....
Messagebox Hangs Program?
Mar 30, 2009The messagebox shows properly but will not respond to mouse click and every is halted.. Comment out the messagebox event everything proceeds. No error is generated, things jest stop at themessagebox and willnot proceed. Code as follows:
[code]...
Program Hangs For A Few Seconds Before Closing
Mar 23, 2010When I close my compiled application, it will always hang for a few seconds before closing. It isn't something to do with my PC, I've got a quad core with 4GB of RAM -[code]...
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Apr 12, 2011I have a strange problem that I can't seem to find any answers on. I wrote two programs in VB2010. Both work great, install and uninstall no problem and I have done this on 4-5 PC's and laptops, all running Win7. A friend saw them and asked if he could use the programs, but when he installed them neither of them would work. All the prereq's were there and he is also running Win7. For some reason all of a sudden his enlarged font reset itself and VIOLA! both programs started working. I have retested this and it fails/works every time.
So my question is, how do I fix this or is it fixable? Is there somewhere in VB where this has to be set to be 'flexible'??
VS 2010 Program Hangs In Vista?
Aug 4, 2010I have a heavily timer tick driven application that seems to randomly just stop on vista/w7 while minimized, sometimes it goes on for hours sometimes just minutes but the end result is same just stops for no apparent reason, the moment i unminimize it it keeps going. This never happens on xp tho where it works perfectly so what might be the problem?
View 1 RepliesProgram Hangs When Closing Serial Port?
Feb 15, 2009I have a VB.Net 2008 app that I have converted from VB6 which reads data from a weight scale connected to a serial port. I am able to read the received data and display it on the screen, but when I go to Stop the reading and attempt to close the serial port, the app hangs.
Private Delegate Sub ShowWeight(ByVal tWeight As String)
Private Sub comScale_DataReceived(ByVal sender As Object, ByVal e
As System.IO.Ports.SerialDataReceivedEventArgs) Handles
[Code]....
Serial Program Hangs After Short Time
Sep 9, 2011I'm writing a simple program to retrieve data via the Serial Port. I have a piece of hardware that returns its 14 byte status every time vbCr is written to it. The program works fine except after a few hundred requests the program begins to hang, off and on. Some times for a second some times for longer. I need to update every 25 milliseconds so the hanging sets in quickly. This faster the interval the quicker the problem sets in but no mater how long the interval the problem eventually starts.[code]...
View 8 RepliesVS 2010 Program Hangs On Client Computers?
May 5, 2011I've created a multithreaded application that copies data from one directory to another, and I'm having trouble getting it to work properly on clients' computers. All computers running the software have Windows 7 and the .NET Framework 4.0 Client Profile installed, which is what I've compiled the program for. I have two threads: one does the actual copying, and the other updates the UI on the program. Whenever I run the program on my computer, even if I'm copying 45 GB, for example, it runs fine. However, if I run it on another computer, it will sometimes freeze the entire computer, so then I have to manually shut the computer down in order to use it again. I have been trying to find out why this occurs, but I cannot. Does anyone think he/she can provide me with some ideas as to why this happens and how I can prevent it from occurring?
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Jun 4, 2012I'm currently having an issue with VB.Net and Adobe Acrobat. The issue comes from exiting Acrobat but the Windows Taskbar still states that there is an Acrobat.exe process open. I have tried using Marshal.ReleaseComObject(), but it still hangs there. I do not want to have to rely on the "End Process" option on the Task bar in order to remove it.
Below is a snippet of the code that I am try to using:
Try
'Tries To Close Acrobat Application
acrobatApp.Exit()
System.Runtime.InteropServices.Marshal.ReleaseComObject(javaScriptObj)
[Code] .....
Although I am not sure if this could be a problem - I run a javascript saveAs script on the Acrobat side in order to make a copy of the file. This also could be a reason why it is hanging, but I ruled it out based on basic knowledge of saving files and exiting from other Acrobat/Microsoft Programs. Acrobat only closes when my application ends. (Currently) I am trying to make it consider the case if a user manually closes the Acrobat application.
Program Hangs During Debugging At A Breakpont Set At A Subroutine Call
Jul 5, 2009My program hangs during debugging at a breakpont set at a subroutine call. It hangs on breakpoints anywhere inside the subroutine also. But does not hang otherwise at other locations where I have set breakpoints.
[Code]...
Program Hangs After Leaving Screen Saver Or Locking Computer?
Nov 15, 2011Our program works fine, until someone locks the computer or the screen-saver pops up (but not ctrl+alt+delete). Once the computer is unlocked/the screen saver is closed, the application stops drawing everything except the title bar, and stops responding to input - it displays a mostly-white window which can't be moved or closed.(Example of application freezing - the mountains are from my desktop background)If we let it sit for about 5~10 minutes, it comes back to life, and doesn't hang again (even after locking the computer/screen saver popup) until the application is restarted.
View 9 RepliesSpeed Up Algorithm - Sieve Of Eratosthenes - Program Hangs On Really Large Values Of N (try 10 Million)
Aug 17, 2009I've written an algorithm that I believe to be correct for computing prime numbers up to n with the Sieve of Eratosthenes. Unfortunately, this program hangs on really large values of n (try 10 million). Here is what I've written...
Protected Function Eratosthenes(ByVal n As Integer) As String
Dim maxValue As Integer = Math.Sqrt(n)
Dim values As Generic.List(Of Integer) = New Generic.List(Of Integer)
[code]...
How might I speed this algorithm up? Where are my bottlenecks?
Make Loop In Program And Calculate Time Taken To Complete Loop?
Nov 23, 2011I am constructing a program, i am new to Visual Basic, but i have past programming experience. I was wondering if anyone knew how to form a loop that could...lets say calculate the answer when two numbers are added together,and it would repeat this thousands of times, etc. And if there is a way, would it be possible to calculate the time taken to complete this loop.
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Aug 11, 2009I assigned an integer as 1, and looped my program using:[code]I can recieve the packets without looping, but once i loop, i receive nothing.
View 29 RepliesEvaluates Loop Condition In Do...Loop Statment To Determine Whether Loop Instructions Should Be Processed
Mar 14, 2011Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
IDE :: Loop Causes Program To Freeze?
Feb 14, 2009My following code hangs my VB IDE. What could be the reason. I am of the opinion that by 'sleep' I am avoiding a tight loop and so the program should not freeze. What should I do?
[Code]....
Program To Loop A Timer?
Jan 30, 2011How can i make a trial program that has a 15 second countdown timer before the start button is active?[code]...
View 2 RepliesVB Program Stops After Loop
Jun 12, 2011I am using VB 2101 express, I am try to right this program but it will not go past the end of my loop, does anyone know why?
If (Not System.IO.Directory.Exists(root + "setting")) Then
System.IO.Directory.CreateDirectory(root + "setting")
End If
[Code].....
Write A Program In .net Using Do While, For Next And Do Loop?
Oct 24, 2010I need to write a program in vb.net using Do while, for next and do loop. Th eprogram will sum all the even integers between 2 and 50. This is what I have so far
Dim intCount, intNumber as integer
intCount = 0
intNumber = 0
[code].....
Loop Over Multiple Variables In A For Each In Program?
Mar 29, 2011I would like to loop over two string arrays but does not work.[code]...
View 4 RepliesProgram Silently Fails During For Next Loop
Mar 17, 2012I have this function for removing duplicates in arrays[code]...
What is happening at the moment is that the inner loop reaches the array.Remove(inner_element) line for the first time in its second loop during the second loop of the main foreach, reaches the inner next line and then just stops executing. There are no warnings / notices, the debugging step though just ends as if there was no further logic.
While Loop - When Running The Debug The Program Crashes
Mar 15, 2012I've been having a bit of a problem using the while function.
Here is my code (Simplified):
Dim RandomNumber3 As Random
Dim RandomOutput3 As Integer
[CODE]..............
When running the debug, the program crashes, and when I step into the program, I find that this While statement becomes an infinite loop. This is a program that uses random number generators to assign a value to something, and this while statement is necessary so that there is never two of the same values showing (RandomOutput, RandomOutput2 & RandomOutput) Have to be different to one another.
Initialize Multidimensional Array By Loop Operation In Program?
Nov 14, 2011How to initialize a multidimensional array by loop operation in VB .Net?
I have some arrays called 'Room', 'Subject', and 'Population'.[code]....
Loop Through Listbox In Program / C# And Set Values To Label Text?
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View 2 RepliesSave Multiple Checkbox Values In One While Or For Loop In Program?
Jan 28, 2010I have 50 checkboxes for 50 american states. The user can choose all 50 or only 1( so basically any number he wants). Based on his choice, I want to insert or update the table in sql server 2008. e.g-
Color = blue and chk1=check, chk2= check and chk3 = check (chk = checkbox). now the user wants to ad 10 more states to this or remove these 3 and add 5 more. so u basically get the idea. the table in database looks like this - ID Color State_id there is a table called states, so stateid shall come from there. so how do i do a loop insert or update in vb.net?
When Remove 'Not' In 'Loop While' Statement Program Runs Indefinitely
May 11, 2009[code] The problem in my case, this is not working with this code. All I need are random numbers outside the above boundaries.Please note when I remove 'Not' in 'Loop While' statement, the programme runs indefinitely!!
View 11 RepliesWrite A Program Using A For Next Loop To Accept A Word As Input?
Apr 28, 2012I need to write a program using a For Next loop to accept a word as input and determine if its letters are in alphabetical order.
This is the code I came up with but am getting the error "Index and length must refer to a location within the string. Parameter name: length" at run time when I click the button.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....