My project uses a lot of System.Drawing.Image commands and sometimes it gives me the out of memory error. I was wondering if there's a way to check remaining memory left and to halt a process if there isn't enough? Or if there is a more practical solution?
View 7 RepliesI want to find the remaining number of prints left on the printer. I use a Sony UP-CX1 dye sub printer. If I go to Printer Properties>Preferences it tells me the remaining prints and also the total prints on the current thermal head. How can I tap into this information with vb.net?
View 1 RepliesI got a function that reads memory of another process and then uses it in different ways. To prevent the GUI from lagging, I start a new thread and executes the code in it. It runs fine, but after a while, aprox. 20 minutes, the applications stops to work and an OutOfMemory exception pops up. The thing is that the memory use of the application isn't higher that 10mb and I can't notice any high increaments either. I have tried everything to find out what is wrong, but it seems to be impossible.
View 11 RepliesI'm running VB2008 on Windows 7; I've written out a ver simple piece of code:
Option
Explicit
On
Module
[code]....
When I run or debug the code, it asks for the First Number and then just completes the running of the program without asking for the second number and uses some random number. The console.readline() doesn't work either, the console window just disappears.
Basically I need to make an if statement that checks the number of characters entered in a text box and pads left with 0's if there is not 3 characters entered.
Also, if letters are entered, I'd like it to produce an error message, or just not accept letters at all.
Is there someone who has done something similar in the past that might be able to help me format this textbox?
I have a need to monitor available memory while my application is running, as a hard number and compared to available memory. How can I do this?
View 5 RepliesIs there a way in vb.net to check whether new memory pages have been created inside a process(such as winlogon, svchost etc) For eg : if i there is a certain value that may change if new memory pages are created inside the process. Then i can compare the previous value and the new value (after pages have been created) and make it sure that new pages have been created inside that process.
View 3 RepliesIs there a way to check whether new memory threads have been created inside a process in vb.net. By hashing the process and checking before and after the threads are created or something like that.
View 11 RepliesIs there a way in vb.net to check whether new memory pages have been created inside a process(such as winlogon, svchost etc)
For eg : if i there is a certain value that may change if new memory pages are created inside the process. Then i can compare the previous value and the new value (after pages have been created) and make it sure that new pages have been created inside that process.
I am getting a System.OutOfMemoryException from my vb.net application, it happened from one certain user. I am trying to figure out whether my application takes too much memory space or the PC has low memory. But she just upgraded her desktop as i3 Intel CPU and higher memory.
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I'm using vb2008 Is that possible to change the pointer from left to right to right to left in the TextBox.
View 4 RepliesIs that possible to change the pointer from left to right to right to left in the TextBox. to became as it show in the pic below.
View 2 RepliesI am trying to figure out how to make a .SubString get the characters from right to left not left to right.Say if a user enters 123456789 in text box 1 and I use textbox1.text.SubString(0,2) it will display 12. But, I want it to get 89.I do not want it to get 98, but 89. I tried textbox.text.substring (0, -2) but that just gives an error.So if Gold is entered it gets ld
Fun
it gets un
VisualBasic
it gets ic
I got a panel that i am adding labels to. I have autoscroll enabled on it so when they fill the viewable space it scrolls. but i need to put the labels to the left unviewable space(when left scroll is already at 0) The label is placed but i dont get the scroll bars and i cant force it to scroll to a - value.
Is this even possible? Same thing with UP.
Or is the Scroll only limited to Bottom and Right?
Just a bit of an issue that we're trying to resolve here. Assuming We're implementing a business model as one dll and a data access layer as another dll. We want them to be de-coupled so we implement an interface for the data-access layer. Great, we could now swap out the data access layer and, as long as the new data access layer fulfils the interface we're good to go, right?
Except we're not. In the business model we need to insanciate the data access layer and, because you can't instanciate an interface, you have to instanciate the actual class. We need to know the name space and the class name.We're going to end up with a line of code somewhere in our business model that looks something like this:-
Dim test as iDataLayer
test = new namespace.DataLayer
Basically, we can declare test as an iDataLayer (the interface) but to instanciate it we need to refer to the actual class (DataLayer). So we haven't really removed the coupling. If we want to swap out the data layer for a different implementation with a possibly different class name or namespace then we need to ammend the code in the business model. We're trying to avoid that.
So far the best we can come up with is to use the activate instance method instead of the New keyword (Late Binding). Because that takes a string we could hold the namespace and classname in a config file or similar, so swapping out one component wouldn't invalidate the others, you'd just need to update the config. That's just our home-spun solution though and I can't help feeling there are betters ways out there.
Date Used
QtyUsed A
09/01/10
5
09/15/10
6
PurchaseDate
QtyPurchase
QtyUsed
QtyOnHand
07/01/10
8
11
-3
08/09/10
9
I have two datagrids, one show Item purchase and the other Usage. I have total the QtyUsed column which I place the total on the 1st row as 11, I would like it to show 8 and show the reminder on the next row and calculate the QtyonHand. Below is the code I've tried and in work but I, think I need to kind of loop to drop to the next row. I had to place the number 1 for i to get the second row, but there may be many more rows. Not sure this is clear.
Private Function Qused()
As Double
'Usage(QtyUsed)
Dim QU As
Double = 0
[Code] .....
currently im using
Dim iDayInYear As Integer
Dim Daysleftinyear As Integer
iDayInYear = DatePart("y", Now())
Daysleftinyear = IIf(IsDate("" & _
CStr(Year(Now))), 366 - iDayInYear, 365 - iDayInYear)
to determine the remaining days in the year, is there anyway to determine the remaining days of the month??
I want a Timer that goes down lets say it has 12 Hours so there should be a Label looking like this:12:00:00 and then every Second the Time should go down. When the Time reaches 00:00:00 it should close and if the Program gets closed it should save the time that passed and if the Application opens again it should start counting down again there where it last stopped.
View 4 RepliesIm using the Winrar dll to extract some big rar files but i want to know what methods are there to calculate the remaining time?
View 9 RepliesHow do I create a project with one EXE file and the remaining files as DLL files? I have 24 forms in my windows application. I am using VB.NET.
View 2 RepliesI need to be able to make my animatedBarPictureBox display BEFORE my code executes. With my current code it only displays after all the Call statements execute, even tho I have placed it before the Call statements. Do I need some kind of repaint command to display this picture before it updates my bookmarks?[code]...
View 2 RepliesPopup window / message for remaining time
View 2 RepliesI have several froms in my application. When application starts, a timer starts for 30 minutes. I want to show the remaining time using a popup window, message or whatever, on whichever form the user is at that time.
View 1 RepliesI'm trying to create a version of the game Spill and Spell. I'm having problems with a click event for Labels that is supposed to exchange the .Text value stored from the previous mouse click with the current .Text value on the new Label clicked. The labels are initialized and stored in an array on the form load.
What's happening is that the values are remaining persistent to the label being clicked.
Desired Results (example):
User clicks on lblDice1 (sender), tempLetter is set to mouseLetter.CurrentLetter, mouseLetter.CurrentLetter is set to lblDice1.Text (sender.text), lblDice1.Text is set to tempLetter. (this part works)
User clicks on lblDice2 (sender), tempLetter is set to mouseLetter.CurrentLetter (s/b initial .Text value from lblDice1 above), mouseLetter.CurrentLetter is set to lblDice2.Text (sender.text), lblDice2.Text is set to tempLetter.
What's Happening:
The tempLetter and CurrentLetter values are remaining persistent to the Label being clicked on. Ie: lblDice1 click will only display the original text associated. If I click Dice1 then Dice2 and then Dice1 again, the original Dice1 text is displayed (same for Dice2).
This is a lot easier to see. All of the controls with the exception of a button ("btnStart") are defined in the code below. Click the Start button to show values in the DiceLabels grid.
The area that's the problem is Public Sub DiceLabel_Click
(this is a work in progress...)
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I am looking for a VB code to upload a file to FTP Server. what I mean is after the user clicks on the Upload button, I need to show the progressBar to the user showing the status of the file being uploaded and show also the time remaining. It is for a windows form.
View 1 RepliesI've got lots of textboxes bound to a Dataset. When I make changes to a textbox with the mouse/keyboard the rowstate becomes changed - and when I do the .EndEdit and update the row it goes to the DB.
I've got some textboxes that get changed in code. When this happens the rowstate remains UNCHANGED. Updates to the DB never occur.If the textbox is changed in code and I also change another textbox in the UI then both changes make it to the DB.
I've verified that the "in-code" changed field in the dataset is actually changed - but the ROWSTATE is still printing as UNCHANGED.Here I'm showing that field 29 has changed to "blank" - but the RowState still is UNCHANGED. Why would changes to the .Text property of a bound control does programatically not change the row state?
Seems a google for this does uncover issues like this - but nothing that's helped me fix it so far - here's one link I can't make sense of[URL]..
How to uncheck the remaining menu items while one of them was selected.Is there any built in property to set for that or i need to write code(uncheck the remaining menu items in menuitemclick event).
View 4 RepliesI have a Web Service with Just one Web Method that returns a boolean value and a function When a client application consumes this web Service, I first want to return a value true and then continue with the remaining process. I was googling and didn't find anything that I can understand. In one of the message posts I saw threading as one option. I tried that too.
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How to calculate the time remaining in copying a file and displaying it through a progess bar?
View 1 RepliesI want my text box to filled by an alphabet first then the remaing characters can be anything. Also i have drop down which is having arithmatic functions.(< ,> , = ,+ etc) If the user selects < or > then the value entered in the text box should be numeric. and if the user selects "=" then the textbox value should be string.
View 1 Replies