Application Only Runs For A Few Hours
Mar 17, 2011
I have 2 applications, 1 that goes out and grabs data every minute and inserts or updates that data depending on a time interval into sql tables, the other 1 goes out at the top of every hour and grabs hourly data. Both of these applications run perfectly fine when they are compiled and published to run on my development PC, both do xml validation and check for duplicate data prior to any sql insert so I know it's not getting SQL exceptions.
When I move them to the Production Server the 1 minute application will work for a few hours and then freeze up and stop working.The hourly application half the time won't work at all.
I've made sure to include a local copy of the references when I compile/build and publish the application. I've made sure the Production Server is up to date with the latest .Net framework.
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Mar 27, 2011
I am writing a system that utilizes the Timer to execute a command after an interval of three seconds. The command is to send a trigger to my RFID reader and hence the program will then decode the received data and changed it to information. It runs fine for the first few hours, but it will crash after that and the error given is an "System.NullReferenceExeption - Object reference not set to an instance of an object." error. Initially, i thought that it might be something that relates to my comobobox selected index change event that might be causing the crashes, but yet the application is crashes after i removed the section.
I fail to find the reason of the crash, even after spend fewing days finding the memory leak or some other events that might cause the crash.
I have insert TRY CATCH METHOD, just to catch the exeption error message that might cause by one of the codes, but still it doesnt show me.
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Jul 29, 2009
how can you schedule a task in VB application to occur only in 24 hours. let's say every 11:25pm
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Nov 29, 2011
i created an .exe application with vb.net 2010 , my problem is when i run the application and then close it, it still runs in processes . why does this happens ? and how can i fix it?
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Jul 22, 2009
I have designed an application just like it is an Excel table. By changing each textbox the application runs a huge amount of vb code and it takes time.
E.g. you want to enter a three digits number it takes from two to four and sometimes more seconds for ech digit to enter. That`s really embarrassing.
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Dec 27, 2010
I have a problem related, not only to VB.net, but also Oracle.I have a simple application that runs queries from an Oracle db (Oracle 9i) and creates reports from it. I am using the official oracle.dataAccess component.I need a very simple report that returns a list of usernames. Something like "SELECT userName FROM users".(userName field is a VARCHAR2).Problem with this query:The top 50 rows are OK.All the remaining are strange characters.
[Code]...
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Apr 21, 2009
I want to hide the taskbar when my application runs, so i can get a full screen view of the application form. I have a code but it doesnt seem to work. It's for my project. I put the declarations in the global declarations part. Declare Functions also i put separately. The rest of the code i put in a button click.[code]...
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Jul 5, 2010
I am new in programming. Have a some knowledge in scripting. me in sample coding using VB 2008. - Create an application that will run on system start up and still run even if user's Log off. - The application will read a list file that contains other application names (e.g notepad.exe) then the application will continue running.. if notepad runs then it will log to a text file the time started the execution and after it was quit it also log the application ended time of execution. - Like its running as services.
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Jun 22, 2009
My name is Orens Xhagolli and I am a between Beginner-Intermediate level. I am trying to create a little game with nice-looking and good options in Visual Basic.net. A good game needs to run in full screen. (Because the new directX is not suitable for my age (13) I don't want to use it and beacuse its a bit difficult to use it.) I read a few answers in MSDN forums but the full screen there doesn't take the entire screen ( The taskbar is visible ).
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Jan 19, 2010
I have a windows service application that runs a timer. When this timer ticks it starts another application that runs a process.The application is started but it does nothing. On the other hand if i run the application manually it works fine.
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Feb 6, 2008
I've built an app that uses the Groupwise (email client) API. It will perform as expected when I hit F5,everything is good, when I use ctrl+F5 it fails with an access violation (see below). I tried to used JIT debugging, but I never get to see the source code, just the assembly. The app *never* fails with this error when run in the IDE.Groupwise documentation is sparse.[code]...
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Aug 4, 2010
In our application user needs to login to a particular company. We have an option in menu that would let user to select another company while application is open. When user selected other company the application restart itself along with the settings for new company.
Until first load everything was fine and user can select other company from the menu, but when application restarts itself it throw and exception stating Unable to load assembly. Whereas if we again try to run the statement in debug mode everything goes fine. Basically, on alternative loads we are getting this error.[code]...
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Oct 7, 2011
I am developing an application, and i need this application to be running in background (like our anti-virus programs) on system task bar.
and how to add right click menu for this icon on taskbar...
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Jun 10, 2011
Can an application refuse the Sendkeys function? I am trying to write an app that will paste text into an application called Cerner which runs via a secure vpn. My code works fine going into notepad or word. I doesn't seem to do anything with the Cerner program.
I thought that the sendkeys command basically mimiced the keyboard.
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Jun 20, 2009
I am just learning Visual Basic and I am following along in a book called "Build a Program Now!".I have an application that is calling a database in SQL and there are instructions for copying the .mdf and .ldf files from the bin folder to the project folder that should allow any changes made in the running application to be reflected in the rows of the database.I have copied the files as per the instructions, but the changes are not showing in the database.
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Sep 3, 2009
An application loaded on a citrix server executes with no problem. When we try to run the same program files on a virtual server, we get silent errors and we do not even see the application window appear. The program runs for a moment in task manager, but then closes down. BTW other .net apps run on the virtual server. Here is the error we see in the event viewer application logs[code]...
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Jun 16, 2009
I have DGV like parent form and detail form like child. I want to give ability to user enter time in detail form in format like HHH:mm, save that value in database and display it in DGV.How to format timepicker or maybe need to use other control to have ability enter time data in format like HHH:mm?
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Nov 15, 2011
This Code allows you too countdown seconds and minutes but im not sure how to add hours or maybe even days to it,[code...]
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Nov 17, 2009
can anyby help me to add 4 hours to the following date time value [code]
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Aug 11, 2010
I would like to calculate the difference between hours and minutes from one textbox and the hours and minutes from textbox two. What would be the best way to do this? I think DateTime would be the object to use, but wondered if anyone has any examples or better ways?
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Mar 26, 2009
if i have two variables,
Dim Hours
Dim Minutes
what i want to do is add the minutes to hours, so if Hours =2, and minutes = 120 I want to say hours = hours+2, not so simple as it seems or am i missing something?
Dim hours
Dim mins
IF mins > 60
[code]....
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May 1, 2009
I have a string that extract it from database table row
Dim Hour As String ="4:15 PM"
How to convert the hour String to a real hour for the date type?
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Mar 2, 2010
[code]....
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Dec 28, 2011
In a textbox the text 1 Days, 8 hours, 45 minutesI want the outcome in minutes , how do i do that ?
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Sep 6, 2007
I want to know how to sum time like
Case 1
If I have MaskedTextBox included 11:00 am and I have onther MaskedTextBox included 1:30 pm. How I get result be 2:30 hours ????
Case 2
If I have ListBox Included 5:01 , 4:30 , 6:10 , 3:20
5:01
4:30
6:10
3:20
Sum Result
H 18: M 61
Convert To Hours
H 19 : M 01
How to Do this Operation with Code VBnet 2005?
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Nov 3, 2011
I'm writing a program that checks something once a day. When the property has been checked, I store the "Now" value as LastCheckedDate. Since this is a dateandtime, in includes both the value of the date and the value of the time. The next time the program is run, I want to determine if the current value of Now has a different date than the LastCheckedDate. The problem is that functions like Datedif subtract the two values using the times, so if the first check was at 16:30 on 11/2/2011 and the second check was at 9:05 on 11/3/2011, the result is about 16 hours, which is 0 days.
[Code]....
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May 23, 2009
I need a timespan difference result in - hours:mintues format.
[Code]...
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Dec 12, 2010
i am struggeling with the result of this code. It's present 164,4 hours which is correct, but i like it would says 164 hours 24 minutes.
[Code]...
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Aug 16, 2010
i have a TimeSpan object which calculates hours and minutes that are passed in.[code]
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May 22, 2011
now when the user login.. he/she will have a time duration of 1 hours..now when the user play after one hour he/she automatically logout and turn back again to the login page.now i done that after one hour of playing by the user he/she will log out now my problem is how can i prevent the user for login again and said that he cannot play again because his/her time is finish...?
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