So im making a program to solve second grage equations,its already working but i want to make it better,heres my idea.Right now the user must input the three equation coefficients (in a equation like 2x+2x+2 they are 2,2 and 2),i want to make it possible for them just to insert the equation like 2x+2x+2 and the computer will get that data,and extract the coefficients from it. [code]
View 1 RepliesI have an equation in the form of a string:
Dim Answer as Integer
Dim AnswerBox as New RichTextBox
'... Settings for AnswerBox
[code].....
Let's say I wrote 1+1 in a text box1 how to get answer in a text box2?
View 10 RepliesI need a VB.NET program to solve linear system with any number of equations
View 5 RepliesI have a boolean condition that I want tthe program to recognize changes when they occur. Currently in order for the program to recognize a change I must restart the program.I have tried using a public timer but that didn't work.
Specifically.....
D1A.Close()
D1A = File.OpenText("MEASURE UNITS.TXT")
D1B = CStr(D1A.ReadLine)
[code]....
I am re-writting the text file "MEASURE UNITS.TXT" labeled (D1B). Depending on this boolean equation different options become available in other parts of the program.I need the program to re-adjust the boolean equation on the fly.
I am making a program which generates a random number between 1 and 10 and when 7 appears it is suppose to tell you how many tries it took to get the number 7 and then end the application. This is the code I have used:
CODE:
This code only generates the number 7 and exits the application, each time i click the random button but i want it to show the other number it randomizes too for example 1 2 3 4 .. etc, if u dont understand, please try it, but im trying to say, when i clikc random it just says number 7 (does randomizing in background) and tells you how much tries it took but i want it to show the other number it randomized also and when 7 appears, then exit the program
how .net solve Dll problem??
View 1 RepliesThis is my matrix. I want to solve C,D and E
sample codes to solve C, D and E in VB.Net?
Answers are C=0.4857143, D=0.0000000 and E=-0.1428571 (manual calculation)
What I'm trying to do is make a MSN like rpogram where you can send Text form a Textbox to a listbox between 2 computers. I have read About TCP/IP connections?
View 4 RepliesI used Microsoft Visual Basic 2008 and i am having trouble making it to where i can make a screen that a video can be played in. I mean i know i have to code it to call if from a folder but i do not know how to set up the form so i can make my own program. My teacher said that there used to be a thing where you just put in on the from and it did it for you is there a special thing you have to download to do that or do you have to actually go through and code it yourself. I do not want to be given code i just want to know the best way of starting my project whether it is making a thing so that i can play the videos
View 3 RepliesI have this home work question and I don't know what I am doing wrong there are a lot of errors which I don't know how to correct. This the question:An automative service shop performs the following services (all the services below are assigned a value):
Oil Change
Lube Job
Radiator flush
Transmision flush inspection
Muffler replacement and
Tire rotation
Create an application that displays the total for a customer's visit. This is my code so far:
[Code]...
What would be the best way to make a Windows .NET application be the only program that can be used on a computer? I have come across timers or events to switch windows back to a window with matching text and some api32 calls to make a form top most.
Is it possible to make an application like the windows lock screen where nothing can be done except that what is on screen? I want to block users from doing other things and only let administrators get to the desktop.
I am making a program that is very simple, but I'm have problems with it. It runs like this:Theres a textbox and you enter in any amount you want.Next to that there are three radio buttons, deposit, check and service charge.If you enter in 100 in the transaction text box, and check the deposit radio button, and hit "Calculate" it will display 100 (in a total display box); hit calculate again, it will display 200, then 300, etc..Now lets say you keep 100 in the text box, but you check either "service charge" or "check" and hit calculate then it will MINUS the amount in your total display box. So for example if you had 300 in the total display box, and 100 in the transaction box and you checked "Service Charge" and hit calculate it would display 200 in the total display box, hit calculate again, and it shows 100.. etc..
Public Class Form1
Private Balance As Decimal
Private Sub CalculateButton_Click(ByVal sender As System.Object, ByVal e As
[code].....
i am making a menu-like program.i added an existing item, which was setup.exe.it appears in the solution explorer.Now, i want to run it using shell or something else at the click of a button. how do i do this?
View 1 Repliesi am making a menu-like program.i added an existing item, which was setup.exe.it appears in the solution explorer/Now, i want to run it using shell or something else at the click of a button. how do i do this?
View 3 RepliesI am making a program in vb.net (visual basic) that has two forms. I have one as a sort of "main" base which will be behind everything. Then I have another additional form which is suppose to go on top of the "main" form. Well I get this to work when I show both of the forms, but I want the smaller (additional) form to be centered onto the main form. If you want an easier sense of it, its a small box in a big box. (all centered and aligned). Does anyone know how to do this?
View 3 RepliesI have an exe with certain variables that need to be changed for each "make" of the program so that each one is customised, but what I need is to create a program that can edit these variables and generate a new exe, or something that can take the source files from my exe and edit the variables then recompile it. Now I don't want to hear "why not just do them by hand", if I wanted that I wouldn't be asking how to do this, I just need this because I need to create 1000's of these custom exes, and I figured that if I could make a program that can do this (edit the variables and compile new exe) then that would make it easy on me since the variables I need to change go in an order from 1 - 1000. I also need it to work on a regular pc not one with all the special VB plugins and stuff, it needs to be able to work on a fresh install of win xp.
View 1 RepliesI have single-thread windows form application written with VB.NET and targeting Framework 1.1. The software communicates with external boards through a serial interface, and it mainly consist of a state machine that run some tests, driven in a loop done with a Timer and an Interval of 50ms. The feedback on the user interface is done through some custom events raised during the tests.
The problem that is driving me crazy is that the performance slightly decrease over time, and in particular after 1200/1300 test operations. The memory occupied does not increase over time, it is only the CPU that seems interested by this problem. The strange thing is that, targeting framework 2.0 and using the same identical code, I do not have this problem.
I know that is difficult without looking at the code, but do you have suggestions how can I approach the problem? EDIT: I am really lost, after a couple of intensive work the application starts slowing down. The selected row is related to its process, if it could help.
EDIT2: Using the Windows Task Manager I detected that the Handles counter is increased by 1 at the end of each operation. I don't know if it is the cause but the application starts to slow down when the handles counter reaches about 1500 handles. I checked that all necessary RemoveHandler are called after each operation. Any idea?
EDIT3: I found that the handles problem is generated by the C++ library we are using to communicated with the serial device. It then happens both in .NET 1.1 and .NET 2.0. The difference, and that's strange, is that if the target .NET 1.1 the application slow down/freeze instead for .NET 2.0 I reached more than 30000 handles without loosing performances. Now I don't know if the problem is really caused by this lost handles, I will try to ask to the developers of C++ library to correct the problem and see if it solves the problem I am having on .NET 1.1.
I am trying to combine 2 regular expressions into 1 with the OR operator: |
I have one that checks for match of a letter followed by 8 digits:
Regex.IsMatch(s, "^[A-Z]d{8}$")
I have another that checks for simply 9 digits:
Regex.IsMatch(s, "^d{9}$")
[Code]...
Apparently I am not combining the two correctly and apparently I am horrible at regular expressions.And for those wondering, I did take a glance at How to combine 2 conditions and more in regex and I am still scratching my head.
I am using window 7, when I run my code in local everything is alright, but when upload to window server 2003 the code will coming error "String was not recognized as a valid DateTime".My computer setting (date format) all same with my window server.[code]
View 3 RepliesIn first search, result will show.In second search, the result in first searching will also show with the result in second searching. [code]
View 4 RepliesI am taken DateTimePicker2, DateTimePicker3 n textbox6.Now i wanted to display the result of subtraction of these two dates(DateTimePicker2-DateTime Picker3) in textbox6 automatically. I don't want to enter the result manually. Plz hlp me I need it badly. I hav already tried in lost focus event also its nt workin.
View 6 RepliesI have a lengthy query..always it shows timeout..I am filling it in a dataset, not using command execute.Is there anyway to solve this rather than optimizing the code? any way to solve the timeout..
View 3 RepliesI have searched lots of way to make a 30 day trial limit of my program. They say "Use -Settings- in visual basic application for your variables" to save the information about user (like : registered or not registered or when the program expire). (You can see the 'Settings' when you double-click on "my project" in "solution explorer") Does the data which we use with "settings" saved in our program or somewhere in the computer?
View 5 RepliesI put it in Communications.For My programming class at school we are required to have made a program. So I decided to make a LAN messaging program which uses VB and Microsoft Winsock Control 6.0. Im quite new and noob at using VB so i'm using a tut here, url... to make the base program.As you can see if you've read it, he uses Microsoft Visual Basic 6.0, while I use Microsoft Visual Basic 2008 Express Edition.
View 3 Repliesthis is my code till now, i no most of it doesnt make sense but i dont know the most efficient way of making a program that has five lisboxes (4 are classes 1 is absent list) of names but each class can only have 10 student and the user should be able to move student to other classes as required
[Code]...
I am trying to make a basic "paint" like form for one of my programs.I would like it to be like a function, where I put the input in, the user changes it, and when the user is done, it returns the changed picture.I know how to draw the picture and then draw lines, dots, whatever where the user clicks, but I don't know how to do some of the features like: text, color picker, zoom, erase, select (copy and pasting parts of the image) , and fill. I also don't really want to have a color picker dialog open ever time that the user wants to change color.
View 9 Repliesim making an msn style alert program. im having troubles getting my program to go off when the time/date saved = current time/date. i got the date from a the date selector object and i formatted 2 integer counters and 2 radiobuttons for the time. but my timer() method doest go off. is my thread wrong or did i do something weird with the date?
Option Strict On
Public Class Form1
Dim strName(1000), strHour(1000), strMin(1000), strAMPM(1000), strCheck(1000), strRepeatcnt(1000), strRepeatcbo(1000) As String
Dim dtDate(1000) As Date
[code]...
I am making a calculator-like program, and would like to make it so that it is always the front-most form, even when another program (like Firefox) is clicked. While Firefox is the active form, my form is still up. Basically, I'd like to make the form like the on-screen keyboard; it never really minimizes unless you specifically tell it to.
[Code]...
Is anyone familiar with making a program compiled in visual basic .net compatible with windows vista 64 bit, The installer gets a runtime error initially but then If I runt it as administrator it runs fine, After it's installed I get a ocx error but when I run the program in admin mode again it works fine, How can I go about editing my program so that it doesn't come up with the errors. Can I get the program to initially run as the administrator?
View 1 Replies