.net Winforms Application, Memory Usage Goes Higher And Higher Never Comes Down?
Sep 27, 2010
We have a .net win forms application, using .net 3.5. Application runs from a terminal server, users access it with Citrix client. when users run this app memory usage goes higher and hiher and it never comes back. even tough we put objects with dispose and set to nothing also the memory usage is not comming down. it starts wuth 75 mb and goes up to 500 mb. it is a 32 bit application.
how can we find the exact problem with the application. the bahaviour is almost same when we run our development box locally.
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Apr 20, 2010
For some reason when i run a script to move an image based on an entered value the image stops moving on any value higher than 10, and i cant figure out why. here is a sample script
Sub RedmoveClick(sender As Object, e As EventArgs)
Dim X As Integer
Dim y As Integer
[Code].....
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Jun 2, 2010
I have 3 classes: Server, Database, and Table. Each class has a "Name" property. How I want it to work is that each server can have multiple databases and each database can have multiple tables. So in the Server class I have this property.
[Code]...
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Nov 6, 2010
I've been designing a Interactive Maths Quiz to test students on the modules they've supposedly learnt, but am having trouble getting the textboxes to display the question as i want them.I need to write things like x3 and x-5 but can't get it to work. To get 2 and 3 i copied and pasted off a word document, and that works, it displays it no problem. I tried the same with others and it just displays a box.
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Sep 12, 2010
We were currently working with our thesis regarding file compression and selected LZW compression. So far, we know how to work on it but we were stucked on how to write a byte.LZW uses 256 and up for the code table because 0 to 255 was used for a single byte.url...Our problem was we don't know how to write a byte higher than 255, s it possible, and read it as it is? Or, different way on how to do it?
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Apr 10, 2010
I have one webusercontrol for Datepicker. When I am using this control in content pages it works fine. I have many controls in content page (textbox, label, etc.). All controls are inside a table. I have placed usercontrol inside <td>. When I click on an image, the calendar control is showing. But that time this calender control pushes all other controls (textbox, label, etc.). I have set the z-index at a higher value, but still it's not working.
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Apr 11, 2009
okay say textbox2.text = "8" if textbox1.text is higher then textbox2.text the msgbox("g")so if textbox2.text = ("9") then msgbox("g") would pop up cause it's a higher number but ifit = "7" then nothing how do i do that
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Mar 24, 2010
Heres my code so far:Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
I want the total sum entered for (Val(InputBox("Enter sales amount:"))) that is lower than 1200 to go in a TextBox2.Text and the total sum higher than 1200 to go in a TextBox3.Text.How should I go about doing that? Is there a way of doing it in the Select Case area?
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Mar 25, 2010
Heres my code so far[code]...
I want the average above 1200 going in a TextBox5.Text and the average lower than 1200 TextBox6.Text.
I've tried stuff like; "average1 = average1 + average" and "average1 = total1 / subject" and average 1 = total1 / subject1". But none of it appears to be working.
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Mar 11, 2009
I want to say the timer count the time the Process is working so that it Counts always higher on a Label with the Text 00:00:00. So it always go higher by 5ms:
00:00:10
00:00:15
00:00:20
00:00:25
and so on.
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Jan 26, 2010
I need help with my forms developed in vb.net 2008. If I run a form in any machine (regardless of xp/vista or Win 7) whereby the DPI is set higher than normal then the size of most of my forms goes haywire. For example: I am attaching 2 screenshots of my updater program. One screen shot shows program being run in normal dpi and the other one shows it being run in higher DPI settings. In the latter case the form sizes shrinks and it looks so weird. In some other forms the controls go haywire. What should I do to ensure that forms looks ok regardless of what ever DPI a user sets in his OS?
(Note: some texts in the screenshot have been edited to protect privacy).
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Apr 24, 2012
I'm working with a ComboBox which has 14 items.
Using the following code I got a problem
vb
If Me.ComboBox1.SelectedIndex = 0 Then MsgBox("item 1")ElseIf Me.ComboBox1.SelectedIndex = 1 Then MsgBox("item 2") '...ElseIf Me.ComboBox1.SelectedIndex = 9 Then MsgBox("item 9") ElseIf Me.ComboBox1.SelectedIndex = 10 Then MsgBox("item 10") '...End If
The problem is that after the SelectedIndex = 9 it won't read properly the SelectedIndex = 10, it seems like it consider only the first number (1) instead of the whole one (10). In fact get the same result as if it was SelectedIndex = 1
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Jan 15, 2012
I am currently working on a program for a higher or lower card game. I have my game set up and in place, however I am having trouble keeping track of the cards that have already been drawn from the deck. I am only playing with one deck and need to make sure that once a card is drawn it is placed in a discard pile and will not be drawn again. I did not post my code due to other students in my class using this forum for their version of the assignment. If someone would be willing to take a look at my code I can send it to you via private message.
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Aug 3, 2010
I've got my program running, but when I start it up on Vista, it does so quite slow. I need it to start up faster, I was fiddling around in task manager to check it was actually started and just taking a while, and I noticed it had the priority "BelowNormal", which I'd like to change.
How can I do this from the registry? I've got it starting up, but how do I add a parameter for the process to be started with a higher priority (I.E, normal, abovenormal, high, realtime, etc., I need to test which is suitable).
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Apr 10, 2011
I am making a new vb.net project . And 1 thing i have noticed many times is The software that i make in high resoltion computer lloks crap in computers with monitor resoluton of 800 by 600.Is there any way we can create software in standard form which has a higher probability to run in all pc's...I can think of 1 way i guess using monitor height and monitor width from properties and then adjusting form size relative to that
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Jun 12, 2011
More like general MySQL than vb.net itself, but still need help.
The MySQL code below:
SELECT *
FROM (SELECT resit_no,SUBSTRING(resit_time,1,19) AS entrystamp
FROM DB1.receiptdetails
[CODE]...
produces:
[CODE]...
Notice the two rows at the bottom. the difference between entrystamp and moded_time is higher than 5 minutes. why would it happen and how to correct it? both table and database use InnoDB.
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Mar 26, 2012
I would like to loop through a number of integers to display the higher number, I would not know the higher or the lower number. How could I compare them to pick the higher one.
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Nov 24, 2010
I am writing a serial application using VB .net Framework V4 , where I use a background worker to Read a file and send it to a serial port using SerialPort1.writeLine method. The BackgroundWorker1.ProgressChanged Event handler sub Updates the Line Number to a TextLabel and adds each line sent to a RichTextBox using RichTextBox1.AppendText() method on main form (Form1).
The problem arises at 115200 Bauds (and higher),may be because now the text is updated real fast on the form an unhandled Exception in BackgroundWorker1.ProgressChanged Event handler sub occurs. Otherwise at lower baudrates ex: 9600,19200 etc. Application Runs Perfectly Fine.
[Code]...
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Mar 13, 2011
So I have this program which I can use to drag files in it and do something with it, and when I run it as administrator, it doesn't let me drag the files in at all, but when I run it normally it does. Is there a reason behind this? And how would I go about fixing it?
My code if it means anything:
Imports System.IO
Public Class Form1
Dim SetSU As Microsoft.Win32.RegistryKey
[Code]......
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Mar 23, 2008
unordered text file of 3 columns to assign into 2 arrays. I've been given a graphing component which expects a two dimensional array for a scatter graph for the set of values in the last column.
How would I parse through the list given an indexed array of 215 possible 'zone alarm locations' and if an alarm log list item, of which there can more than one for any given zone location, compare in the two dimensional array any previous value and replace it with the higher valued one? The following are my declarations for the 2 arrays. It isn't clear to me why the array for the scatter data was defined as (999,1) knowing there are only 215 possible x values (alarm zone locations)
[Code]...
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Feb 12, 2012
I have a small-scale WPF application using VB.net as the code behind and I want to add certain features, but i'm concerned about performance.
1) My app interacts with a third party database to display "realtime" data to the user. My proposed method is to create a background worker to query a database every 30 seconds and display the data. I query about 2,000 records all long integer type, store them in a dataset, and then use LINQ to create subsets of observable collections which the WPF controls are bound to.
Is this too intensive? how much memory am i using for 2,000 records of long int? Is the background worker querying every 30 seconds too taxing? will it crash eventually? Will it interfere with the users other daily work (excel, email, etc)?
2) If an application is constantly reading/writing from text files can that somehow be a detriment to the user if they are doing day to day work? I want the app to read/write text files, but I don't want it to somehow interfere with something else the person is doing since this app will be more of a "run in the background check it when I need to" app.
3) Is there a way to quantify how taxing a certain block of code, variable storage, or data storage will be to the end user? What is acceptable?
4) I have several list(of t) that I use as "global" lists where I can hit them from any window in my application to display data. Is there a way to quantify how much memory these lists take up? The lists range from lists of integers to lists of variables with dozens of properties. Can I somehow quantify how taxing this is on the app or the end user?
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Jan 27, 2010
Does a the size of the class affect the memory usage of the application? is it better to break big classes into smaller classes or just group them up into one big class.
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Oct 5, 2009
when setting a column to identity it will auto increment 1,2,3,4..however if you delete 4 & 5 and then insert another record it will go in as 6.If you do this a lot you end up with huge gaps in the numbers,is there any way to make SQL default back to filling in the gaps and only count higher if there are no gaps?I know I can do it in the application, or even a UDF, I just want to make sure I am not reinventing the wheel?
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Jun 20, 2012
I want to run something like this:
For a = 0 To 4
For b = a To 4
For c = b To 4
[Code].....
What would be the best way to retrieve the "i" values from higher levels? Should I store them in an array?
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Apr 17, 2011
I've noticed that every time I start a new thread in my program, the memory usage jumps about 1000k and it never goes back down. I have ensured that the thread is no longer running, and only one instance of my worker thread is ever running at a time. I am using ThreadPool.QueueUserWorkItem and ASyncOperation to get stuff done. The program starts using a Sub Main in a module that uses STAThread; I read that using STAThread instead of MTAThread makes it impossible for the Garbage Collector to get in and consider objects for garbage collection. However, when I change the STAThread to an MTAThread, the WebBrowser control in my frmMain cannot be instantiated.
I get this exception:
Code: An unhandled exception of type 'System.Threading.ThreadStateException' occurred in System.Windows.Forms.dll
Additional information: ActiveX control '8856f961-340a-11d0-a96b-00c04fd705a2' cannot be instantiated because the current thread is not in a single-threaded apartment. I do threading with the WebBrowser control, so will using MTAThread fix my problem? If so, how should I partition my code so that the WebBrowser control won't be affected by the above exception? I call the thread repeatedly with a timer (although only one instance ever runs at a time), and my program's memory usage starts at about 5000k and can jump to 300,000k+ depending on many times the thread needs to be called.
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Aug 7, 2009
So I have an ASP.Net (vb.net) application. It has a textbox and the user is pasting text from Microsoft Word into it. So things like the long dash (charcode 150) are coming through as input. Other examples would be the smart quotes or accented characters. In my app I'm encoding them in xml and passing that to the database as an xml parameter to a sql stored procedure. It gets inserted in the database just as the user entered it.
The problem is the app that reads this data doesn't like these characters. So I need to translate them into the lower ascii (7bit I think) character set. How do I do that? How do I determine what encoding they are in so I can do something like the following. And would just requesting the ASCII equivalent translate them intelligently or do I have to write some code for that?
Also maybe it might be easier to solve this problem in the web page to begin with. When you copy the selection of characters from Word it puts several formats in the clipboard. The straight text one is the one I want. Is there a way to have the html textbox get that text when the user pastes into it? Do I have to set the encoding of the web page somehow?
[Code]...
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Jun 6, 2010
i am a beginner in vb.net programming...started a project in it.Below is the breif project description.The application is to ensure the integrity of the files.Following are the majors things that i have to implement
1. To browse the files from the disk on runtime.initially i am just taking the database files so it's basically to connect with the MS access db files.
2.To apply the different hash and encryption algos on the file.
3.To store the results on the hard disk back.
4. To calulate the performance of each algo using some performance matrix.(TIME,MEMORY USAGE etc)
Now i am having problem in two things.First in runtime connectivity with MS access batabase..and secondly and the main problem is that i could'nt find any appropriate builtin function to calulate the processing TIME and the MEMORY usage.
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Aug 30, 2009
I've been having complaints about my applications that they use to much memory.Is there a way to make them use less?
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Nov 22, 2011
Having a problem with the amount of memory being used going up and up, and expanding until there is no memory left. I'm using the GHeat.Net plugin to build images. Here is the full code:
Dim pm As New gheat.PointManager()
Dim g As Graphics
Dim startZoom As Integer = 2
[code].....
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Jul 31, 2011
You can easily get the memory usage of the current process using workingset64 However I could not find any event like OnMemUsageChanged so I can display a little mem usage meter that displays live/real time the mem usage value. Updating in a timer every second can be done but looks inefficient. Is there anyway I can get an event or callback every time the mem usage changes ?
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