Writing A Exponent And Give Signals Out At The Same Time
Nov 9, 2009
I work with the Visual Basic Express Edition 2008. I'd like to write in a text box : 1s5 but the 5 has to be the exponent of s like 1s5 does anyone know how I've to write this in Visual Basic?
Second problem is:
Dim foo As New clsParallelPort(&H378, &H379, &H37A)
foo.communicate(2, clsParallelPort.switch.SWITCH_ON) 'switch data 1 on
foo.communicate(3, clsParallelPort.switch.SWITCH_ON) 'switch data 2 on
[Code]...
The problem is that I give out a signal to the 8 data lines and then to the control line 10 and then to the control line 1 but what I'd like to do is to give firste a signal out to the 8 data lines and then at the same time a signal out to control line 10 and 1. How can I do that?
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Jul 22, 2011
So I currently have the following:
2 timers
2 labels
1st label is "Clock" this pulls the time from the users current time zone/local time
2nd label is "UTCClock" Which would be UTC time
Now I have this for the first label: clock.Text = Format(TimeOfDay, "hh:mm:ss tt")
Which would give the users current time zone/local time. As for the UTC.. how would I add in for the UTC time from where the user is located at? I did some searches.. but couldnt find what I was looking for.. IM pretty sure its not as easy as getting the users current time zone/local time.. So im assuming that Theres a "bit more" code into getting UTC time..
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May 15, 2010
I'm making a speed game in VB.Net (Console Application) and users have a certain time to press a certain key. So how can I give the Console.ReadKey function a timeout without just waiting until a key was pressed?
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Jan 9, 2011
Ok but I think you are well! I have created my class for picturebox but the problem is that I have failed to give it object which will change its image after a time t.
My class is:
CODE:
my problem is how I caan create different picture box at different position and make them to change their pictures in time(Picture list should be available in resources folder).
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Jan 4, 2010
How i can give session expiry time (about 5 min) in vb.net in pageload event
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Feb 10, 2009
Is there a command in vb that can be used to pause a routine to give time for the form to show before the routine starts as my routine is running and completing before my form shows up?
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Apr 16, 2012
I need to make a program that whatever user enters in bits, then corresponding Return-to-zero signal would generate.. how to generate signals.. so would it be possible to make it in VB.NET?
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Aug 19, 2010
VB 2005 conversion from VB6 I basicly have 2 questions. I am pulsing a relay up to 99 times per incident. I need to delay between sending the pulse signals. The delay time cannot change when I change between CPU speeds. I am assuming the sleep() function will work fior this. (This is a count of the number of game tokens to despense).
The second question is.. after I have pulsed the relay x number of times, I pulse another relay to send this number to a token machine to actually despense the tokens. While the tokens are despensing (about 1.5 minutes do despense 99 tokens) I want to release the computer CPU so that the cashier can continue to sell items. What command will allow me tho do this?
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Feb 28, 2011
Dim decMonthlyPayment
As Decimal
Dim decPrincipalAtRetirement
[code].....
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Jul 4, 2011
How to use time in vb.net.I would like to make a traffic lights program in vb.net but am not yet sure where to start besides the interface.I want the lights to change within a give time.
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Oct 21, 2009
I've got an app that sometimes stores some decently small numbers, such as 0.000023425. These numbers get loaded up in TextBox controls for users to edit.
Dim number As Double = 0.000023425
someTextBox.Text = number.ToString() ' Shows "2.3425E-05"
As mentioned, the text that shows is 2.3425E-05, which isn't exactly intuitive for the user to see, plus I have numbers even more precise (out to 19 decimal places). I would like the output to be fixed point. Of course I could easily and cleanly do:
number.ToString("F20") ' Shows "0.00002342500000000000"
But then there's an annoying number of zeros left over. So, to fix that, I could do:
number.ToString("#,##0.####################") ' Shows "0.000023425"
Which is what I want, but is there any better way to do it than to have that giant ugly format string there? So, ok, it's not that ugly, but surely there's a different way, right? My goal is to show the raw value being stored in the DB in a friendly way, and I would rather not have to force a format on the number at all.I found that changing the underlying datatype to Decimal solves the issue.
Dim number As Decimal = 0.000023425
someTextBox.Text = number.ToString() ' Shows "0.000023425" instead of "2.3425E-05"
So it sounds like Doubles aren't precise enough to be displayed normally?
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Oct 18, 2010
how to get the mantissa and exponent from a double in VB.net? I know I can do a string parse and some conversion to ints but I wondered if anyone had a mathematical equivalent formula that would allow me to do this?
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Sep 9, 2010
I have things set up so that the program is ready to start logging ,only when Recieving=true.This is controlled with Button1. So I click button1,Serial port is open and waiting for some signals from the Dyno.When 1 signal come it put a "1" in TextBox1 ,and for the second a "2" and so on. Thing is sometimes it starts right away, like I want it to,and sometimes it lags a fraction of a second, even though the Port is open.When it lags there are already 5 to 10 signals gone by before it starts logging 1,2,3,...and so on. Sometimes it don't start at all.Then I have to close and re-open the form and it works,but with lagging on the first "set"
"Textbox1 > 0 then" triggers a timer (not seen in this code)that samples Textbox1 once pre interval and writes the value to a listbox. On the upside as soon as a "1" is displayed in textbox1 the timer starts like it's supposed to.I noticed this behaviour before I added the timer and besides the timer has nothing to do with the signals coming from the SerialPort. I have my form setup so I can run "sets".Run one "set"...save...reset...run another "set" ...and compare.It's always the first "set" thats off.If I run multiple "sets" the first one is completely "whacked", and the rest are consistent.
Think this could be the SerialPort lagging,or code problems?
Public Class Form1
Dim resetValues As Boolean = False
Dim RPM As Double
[CODE]...
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Mar 1, 2011
(First off all hi to everyone my first post!) Ok, i have two programs one program writes to a text file on a consistent basis, while the second program is opening this text file on a consistent basis for reading.. Sometimes the programs are accessing the file at the same time and the user keeps getting this error : this process cannot access the file because its already in use..
Is there any class, in system.io that i can use to modify the settings of this text file so both programs can access it at the same time?
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Feb 7, 2012
I'm working with Ticks a lot at the moment and when setting a timespan/similar, I find the shorthand exponent notation 3e6 far more easy to read at a glance than 3000000
VS converts to the long form as soon as it tidies up the line.
Is there any way to turn off the editor feature which reformats this?
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Sep 25, 2009
writing user info such as user, computer name, date, and time to an acces database using a button click event. Then use a query to check if the user has accepted the aggreement. If the user has accepted the aggreement then call a vb.exe that display the aggrement. I have a login script that runs the vb.exe and uses a button click that records the user info to a csv file, but if the user has already agreed to the policies I do not want it run again.
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Jan 31, 2009
I'm writing a windows service (MacTimeFix.exe) to fix the Windows time on a Macintosh (it's like this: i live in Moscow (GMT+03:00), and Mac OS thinks that the system time is GMT+00:00 and adds 03:00 to it< and Windows thinks that system time is the local time).I need to execute my code when my VB app is closed. (it happens with the shutdown of Windows) The form is invisible (hidden), and the user mustn't click anything except windws shutdown button. It is a service. When i write a Form1_FormClosing sub, it works only on Alt+F4 or CloseButton and doesn't work when the app is stopped from Windows Task Manager or whatever also.I need a way to execute sub when app is closed with taskkill (without /force) or a way to execute a several app on Winshutdown.
Here is my code:
Public Class Form1
Dim SystemMary As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Me.Load
SystemMary = Mid(TimeString, 1, 2)
[code].....
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Dec 7, 2010
How can I convert a number with exponent value (such as 4.775900000000000e+004 ) to return a whole number, such as 47,759 using .net2.0 framework? FYI, this is a weight category, not currency.
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Sep 6, 2009
I have an ASP.NET application with a SQL Server back end. I am storing all my dates in UTC format and doing the appropriate conversions to the local time zone of the browser viewing it. One of the pages asks for a start date and end date (no times).
I am taking the start date and setting the time to 00:00:00 hours (midnight) and I'm taking the End time and adding a time of 23:59:59, so that the date range covers the whole day. Now what I'm trying to do is do a SQL query to do a search for records in this date range. The problem is, the data in SQL is in UTC time and the user is typing their dates and times in their local date and times. My quickest solution was to convert the date and time to UTC, then search the records. However, by doing this, I am to believe ASP.NET converts the given time and date to UTC based on the server time zone. How can I convert a date and time to UTC time based on the time zone of the user?
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Jan 11, 2010
How can I make my program operate in a sandbox for security? I am using Visual Basic 2008 Express.
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Oct 15, 2009
i am new to this forum, hope u people will help me out.i need to add header to a text file which is created using my code.
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Jul 23, 2011
I have a question. I'm using visual studio 2010 and I am making a windows application and I set the framework for the app to .net 3.5..I have some threads in my app and when I run it on my output screen it says: ' The thread '<no name>' (0x***) has exited with code 0 (0x0).Does anyone know how to change the '<no name>' ? MatthiWare N°1 .NET Freeware & Shareware site! Title: Project leader, Owner @ MatthiWare Current project: MW Virtual Desktop Contact: Admin@matthiware.net.ms Website: MatthiWare " MatthiWare... What else?!? "
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Aug 24, 2009
I have a datagridview which fetches data from a local SQL server. Now, I have a setting called My.Settings.database_url which indicates the hostname of the SQL server.
Now, the problem is that if the host name is incorrect, instead of getting an error, the app just freezes. So what must I change in order to fix that?[code]...
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Jun 23, 2011
Sometimes the app is working in a long time process, and I wnat to tell the user something like "Wait a moment, please"
I though to use a modal form but if I show this form, the process I said is not initiated.
How can I give this kind of messages?
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Aug 12, 2009
Is there a way to give a value to multiple variables (integers in this case), instead of all at once?
For instance, I have Dim aceVal, twoVal, threeVal, fourVal, fiveVal, sixVal, sevenVal, eightVal, nineVal, tenVal As Integer and, pending listbox selection, I'd like to assign threeVal fourVal and sixVal all values of -1.
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Mar 9, 2011
I need to create a variable which can symbols for only "1, 2, 3, 4, 5, 6, 7, 8 or 9 " so that I can use to check for a certain text.[code]...
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Nov 30, 2009
I have a 2 combox's with the following items, Excellent,Good,Average,Fair,Poor in them and a textbox with a user defined numeric value
I would like to be able to do the following:
perform a calculation based on values in each box , example
combox1 = Excellent
combox2 = Good
textbox = 1000
[Code].....
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Sep 30, 2009
I'm trying to figure out how to give Messagebox a timer. I found that people said i need to make a new form with a timer, How do i go about doing that?
Public Class IntegerMath
Private Sub BtnIntMath_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnIntMath.Click
[Code].....
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Apr 1, 2011
I have used the
<ScrollViewer CanContentScroll="True">
<TreeView ...>
</TreeView>
</ScrollViewer>
but not properly working I want a new one
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Aug 25, 2009
Now using VS 2008
Before I used VB 6, now I Upgraded to VB 2008.
VB6 Code
sdate = DateToString(dtpicker1 - 1)
edate = DateToString(dtpicker2)
Above code is working fine.
After Upgraded to VB 2008
sdate = DateToString(dtpicker1._Value)
edate = DateToString(dtpicker2._Value)
If I Put
sdate = DateToString(dtpicker1._Value - 1)
It is showing Error.
How can I write a code like dtpicker1 - 1
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