I want to make a loop that only loops if the serial link is open and Button3 (which writes a stop signal to the program) is not pressed. I've gotten as far as this: Do While Serial.IsOpen = True & Button3. but do not know how to tell the while loop to stop when Button3 is pressed.
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I currently have a working program that creates one colored pixel in a Bitmap, displays the bitmap in a pictureBox, and "jiggles" the pixel by making it move in a random direction by 1 pixel every time a button is clicked. I want to make the pixel move automatically until a Stop button is pressed.
[Code]...
an application i developed using vb 2008 express, to fill a web form with data from an access database, one after another when a button is clicked hasn't given me what i expected. the loop was suposed to stop after filling web form with the first data on clicking a button and continue to fill the webform with the next(2nd) data from the database on clicking the button again. Below is the code i wrote
Private
Sub STARTButton_Click(ByVal
sender As System.Object,
ByVal e
[Code]....
I have a login in system that i'm creating for a game. I have this code for checking to see if the username and password are correct in the text file.[code]I want to know how to make the for loop stop once the username and password have been found correctly.Also, where would I put a message box saying that the username or password are not correct if they don't match up or they're not in there at all?
View 3 RepliesI have a TextBox and set the MiltiLine property to true and AcceptsTab property to false.When the TextBox has focus and i press Tab it works fine and the next control get the focus, but when i press Ctrl+Tab it works as if AcceptsTab property is set to true and makes a tab character into the TextBox.The reason i press Ctrl+Tab.. when switching between forms in my MDI application.Now how to make a Ctrl+Tab when pressed works like Tab when pressed in a MultiLine TextBox?
View 1 RepliesIs this possible? I have a list of tasks in a threadpool that i would like to clear (stop) when a button is pressed.Is there any way i can do this?
For i = _PortFrom To _PortTo
Threading.ThreadPool.QueueUserWorkItem(wcb, i)
Next
As you can see its a port scanner, and id like to be able to stop it half way through if possible?
I created a form and have the variable inputs for 4 motor run statements. Then with a start button the script starts and it is surrounded by a for next statement to loop 10 times. It works fine but if i need to stop the execution of the script with a stop button. I put the stop in a new section but of course does not work to do a motor stop. It just causes the exe to not respond till the loop is complete. Just need to be able to stop the Run1_Click button section.
Edit:I do not mind if it finishes the 4 motor run commands and then stops execution of the loop. So need to figure out a way to trigger a stop from a button on the form to stop the cycle. For the future the loop will be a variable integer input so 10 will not be the standard.
Edit::Does a ' Do ' statement sound like the thing to use? If so how and where would I place that? Have a Stop button on the form and it would stop after the 4th motor run command.
#End Region
Declare Function InitStp Lib "stp.dll" () As Integer
Declare Function RunMotor1 Lib "stp.dll" (ByVal steps As Integer, ByVal interval As Integer, ByVal direction As Integer, ByVal outputs As Integer) As Boolean
[code]....
I have written a function that gets the alexa ranking of a given url, now this function works perfectly but I want to loop through a ListView of urls and grab the alexa rank of each item (url) with my function.The code works great if I put a MessageBox in the loop to test that the function is returning a value but when I remove the MessageBox the loop does not work.I need it to loop through adding each result without a MessageBox stop in each loop.
vb
For Each Item In ListView1.Items
Dim result As Integer
result = GetAlexaRank(Item.Text)
[code].....
I'm developing a interface in VB.net which will control two stepper motors. Counting on your tips I managed to control them manually I mean, there're 4 buttons used to move the motors clockwise and anti-clockwise. The point is, the main part of our project is control the motors automatically. Our idea is based on two editable fields, X and Y, where the user would insert the displacement value he'd like the motor to move. After filling up both fields, the "GO" buttons would be pressed. So the loop would run depending on the displacement values in X and Y.
Attached you can find the main screen:
Below you can find the main code.
Public Class Form3
Dim velocidade As Double = 0.004
Dim X As Integer = 0
[Code]....
I'm trying to get an in a loop to accept a value and add it to a list each time okay is pressed. For some reason, I have to add a value twice for the input to be added to the list. For example, if i enter the string "hello" in the inputbox and click okay, it doesn't add to the list, but if i do it a second time, it goes in.
Here is the code for it
Do Until lstCourse.Items.Count = CDbl(txtClasses.Text)
InputBox("Enter Course Number", "Course Number")
strCourse = InputBox("Enter Course Number", "Course Number")
lstCourse.Items.Add(strCourse)
Loop
I have this little application that runs a SQL query works great, now I want to have a Start Button run the and display results then System.Threading.Thread.Sleep(300 * 1000) for 5 min then run again and display results and loop till I buttonstop_click. unsure if the sleep is the best method.
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I wanna ask how to code to make a button make a sound out when pressed? Can you add sound files to it, like a mp3 file?
View 3 RepliesI have 3 textboxes. I want Button3 to remain disabled until ALL three are filled out. This seems to work, but for only ONE textbox:
If Textbox1.Text.Trim <> String.Empty then
Button1.Enabled = True
Else
Button1.Enabled = False
End If
in c++ we use break statement to stop a loop what do i do in vb.net to break a loop
View 6 RepliesHow to Stop This " Like to Make a button That will Stop it from Repeat".[code]
View 3 Repliesfor x = 1 to 45
if x = 15 or x = 30 then (push a button to continue)
for y = 1 to 50
{some code here}
next
next
what i want is the loop to stop at 15 and 30 where you have to press the ok button on this form to restart the loop.
I am trying to make an application with a start button and a stop button on a stop watch program. These are the codes I am using but my seconds on the stop watch don't start.
Public Form Dim intSecond As Integer = 0
Form 1
Private
Dim intSecond As Integer = 0
intSecond +=1
[Code]...
After I write my code and try to run the program, the seconds will not start,
[Code]....
As this Loops round, the answer for formula will eventually become the same as what was input, X. How can I get the Loop to stop when it has the same answer twice in a row? The counter will count how many times it has had to Loop before finding the repeated answer.
I have this program here where it is supposed to show the Fibonnaci #'s and stop at 2000, but it keeps on going past 2000. This is what I have so far.
Option Explicit On
Option Strict On
Module Module1
[code].....
I need to run a do while loop or some way of starting a search directory loop, then if a user presses another key, it will stop that current search, and restart with the next letter entered. I appreciate any help given and insight. I am basically trying an incremental search feature, but currently whenever a user types in one letter, it does a full search, then on next letter it searches again. I want it to stop if they are still typing in letters.
If SearchTextBox.Text <> "" Then
Do Until Form1.OnKeyPress 'NEED HELP HERE
Try
[code]....
stop do-loop with keydown
View 5 RepliesI have something to ask again.. I develop a program that will send bulk messages but the problem is that when I load at least 1000 emails then I want to stop the application I cannot stop it. Is there any way to stop this application without closing the form? So that i can save the file on my listview? Here is my code upon send bulk emails. [code]...
View 6 RepliesI have a loop set up as [code]I need to know a way to break that loop at the current item it's on in the listbox (listbox1) via a button click (button8)
View 5 RepliesI have 2 subs like below, and when I make a loop with 1000 iterations and capturePicture() in it. after 700 iterations the event is not raised anymore.
Public Sub capturePicture()
Try
AddHandler capturePic.FrameEvent2, AddressOf CaptureDone
[Code].....
i have been working on maths game program for college and have advanced to the part where i have random questions asked repeatedly.
i need it to loop 25 times as atm it keeps on going and wont stop. also i need it to count how many are right, and each question they answer they get 2 chances to get it right or the game ends.but i dont know how to do any of this. this is my code so far for the questions
[Code]...
how can I stop a do/until loop when I press button1?
View 15 RepliesI would like to be able to stop a loop while executing using the ESC key.I've found a lot about using the above key from within a Form (for example, to unload it), but very little for the use of the key within a Procedure (Sub, Function) and particularly with respect of preventing a loop from carrying on execution.
View 3 RepliesI am using VB 2010 , I have a loop that takes something like 5 minutes until it's finish. I want to allow the user the option to stop it in the middle or whenever they want. There's a button which starts the loop, and after I click it the loop starts running and the button is sort of "stuck".I saw something called "background work" in the VB Toolbox, can it be a solution to my problem?
View 2 RepliesHow to make a key being pressed do something?If 'w' is pressed, then...
View 2 RepliesI am fairly new to VB but really enjoying programming. I'm looking to create a counter that counts to 25 and loops back around again with a button control and another button control to stop it. So I press a button to start and another to stop and I want it to display the number it stopped on. Is this possible? and how do I do it if it is? I can figure out how to display the label and create a simple counter(that doesn't loop), but I'm unsure on the rest.
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