Loop Function - Iteration Not Working As Intended
Jan 18, 2012
I'm using a DO interation to loop a function I'm using to test for internet connectivity. The code is working fine, except that when one of the tests is satisfied the loop stops. I want this to continue in the background while the program is running. How can I get this to work?
Private Sub checkInternet()
Dim InetChecker As Boolean
InetChecker = CheckForInternetConnection()
Do While LabelCount.Text <> ""
Thread.Sleep(10)
[Code] .....
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Mar 13, 2010
I'm currently working on a VB .net project that requires connection to a MySQL table. I've no problems loading data from MySQL table to a datagridview. I'm hoping to allow users to make changes to the datagridview and save those changes back to the MySQL table. Below is the Sub I wrote to save the changes. Before saving, it will check if there were any changes made to the datatable. However, datatable.getchanges() does not seem to detect changes made to datagridview (and hence, datatable; I "bound" the datatable to datagridview by means of bindingsource).
[Code]...
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Nov 15, 2011
I just can't seem to understand when i am suppose to put Accept outside the LOOP and when i'm suppose to Accept inside the LOOP at the beginning.
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Jun 18, 2009
Does a For-Each loop in VB have an iteration count, or would I have to do that myself?
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Nov 10, 2009
I've got a for loop. In my loop , I've got a condition , and if that condtion is not met, I need to move on to the next iteration.
So if I have :
For Each txt As Control In tbcell.Controls
if TypeOf (txt) Is CheckBox Then
[code]....
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Mar 4, 2009
Does anybody know how to count the number of iterations in a for-each loop? I want to have a variable inside the loop, returning the corresponding counter every time the loop iterat
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Apr 16, 2010
i have a for loop that is executing. i want while the loop is executing to be able to define using a variable how many seconds the For loop needs to pause before next iteration.
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Aug 20, 2009
Hi. what is the difference of sleep function and pause function (using timer) between a loop.
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Dec 30, 2011
How do i use a while loop and MID$ function instead of the split function?
i'm trying to have the input (textbox) compared to a list(array) in a text document
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Jun 7, 2011
when i try to increment the for loop it jumps to case 5 of the select case statement. What i actually want is when i press the Next button it shows me a set of options which is case 2, but now it straight away jumps to case 5.
Private Sub btnNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNext.Click
Dim counter1 As Byte = 1
For counter1 = 1 To 5
Select Case counter1
[code]....
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Mar 1, 2009
What I'm trying to do is first calculate the deductions (0.5 and %7) amount form entered visa amount, then send remaining amount to cell "B6" in my workbook sheet1. if there is more than one visa then I need to see total of all visas after deductions in cell "B6". [code]
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Nov 4, 2011
I can't get the loop to work.
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Dec 3, 2010
Dim cv As Integer
Dim cc As Integer
Dim CurrentValue As Double
Dim ObsoleteValue As Double
[code]....
Basically this code works for the first column of the DataGridView. It sort of stops iterating after the last calculation of the row is performed and doesn't change the cc value at all. Meaning the loop gets stuck after the first iteration.
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Oct 28, 2011
I have a list of string in an array. I'm loop through those strings and if the text of a combo box matches one of those strings, I want a message to appear. If they don't match, I want a method to be executed.
[CODE...]
The messagebox appears, but the method is still executed. Which means it isn't stopping when it finds the match. I tried exiting the loop, but it still doesn't work.
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Nov 30, 2008
Basically, what I'm doing is navigating to a website with a backgroundworker.In the WebBrowser1_DocumentCompleted event, I put code to fill in a form and I set the value of a boolean called "formFinished" to true once the form has been finished and submitted. The problem I'm having is that it only posts data to the second website, no matter the order of the websites. I'm wondering how this is possible since I have a boolean in state which only gets set to true once the first form has been submitted. So I have no clue as to why it only submits the second one, but not the first one.
[Code]...
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May 8, 2011
Im currently making a tower defense game and im on my last bug for the game and i cannot get it solved. For some reason my For Loop to check if a shot hits a person is not working properly. Ill set it to "For Me.x = 1 To NumOfFaces 'Const for 5' and itll only check the first enemy and last enemy. Here is the code to check for if a shot hits an enemy, this runs on a timer through out the game.
Private Sub HitFace()
For Me.x = 1 To NumOfFaces
If Shot1Firing = True Or Shot2Firing = True Or Shot3Firing = True Or Shot4Firing = True Or Shot5Firing = True Or Shot6Firing = True Then[code].....
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Dec 17, 2010
Is there a way to start same Thread form foreach loop
Sub
For Each lvItem As ListViewItem In _ListView.SelectedItems
tThread = New Thread(AddressOf Me.myFunction())
[Code]....
In my case, when i select one item from list it is working fine...but when i select more than one files it odes not work.
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Jul 1, 2009
I have a solution in which I have included three projects, say X Y Z..Now one of the projects X refers to the namespaces A.B.ObjectStore and another namespace ObjectStore..Now when the ObjectStore namespace is used the compiler thinks it is A.B.objectStore.I cant use a better qualifier as the one intended to be used is a plain ObjectStore only.
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Apr 7, 2012
I'm designing a system to detect whether a projectile arc impacts a stationary square target. However, the detection is very limited and only seems to work if I use a while loop and a very large area, whereas if possible I'd prefer to animate it using a for loop and have the target somewhat smaller.Here's what I have at present:
Private Sub Timer2_Tick(sender As System.Object, e As System.EventArgs) Handles Timer2.Tick
If (Not errorState2) Then
[code].....
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May 3, 2011
I am using VB2010 and have a project set up with a DataGridView that is to display a table of data selected from a SQL 2008 database using a pre-defined dataset. My question is simply how to display the data in the intended format as seen in the attachment. I am attempting to merge rows in the first two columns of like-data. Addtionally, if that can be done, I would also like the user to be able to double-click on a name that would open an editing form.
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Feb 6, 2012
I have a couple of shared methods in my app which are intended to be used with ObjectDataSource's (and other reflection based objects). They handle a lot of automatic parameter checking, filtering, etc. They are, however, all one time use methods (they rebuild everything on every call). It would be much better for someone writing code directly to call the instance methods so that all the filtering, etc, is stored between calls.Is there an attribute I can add to my methods to indicate this? The best would be if it would prevent the method from being called without reflection. Second best would be to issue a warning that the method is being used wrong.[code]
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Mar 21, 2012
The only place I've seen the Friend modifier used is in the WinForms designer, as alluded to in Why is the modifier set to Friend in Winforms? and VB.NET: what does the 'friend' modifier do?. The Friend modifier appears to be an almost arbitrarily wide access level that was created to solve some historic architectural problem in VB, I just wonder if anyone has a meaningful continued use for it?
I have had some desires to expose methods only to a given namespace so as to roll the functionalities of a related collection of objects together and manage any of their non-thread-safe methods, while exposing the safe public methods to a wider scope in the same assembly. This access level does not exist yet Friend does. Possibly a corollary question then, is my usage of assemblies and namespaces at odds with what is intended?
[Code]...
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Sep 21, 2010
I am currently reading up on documentation for a possible assignment I might be put on. In a design document they talk about the .exe.config file. They state that its only purpose is to store constants: "Also note that this file is meant to store constants only, it is not meant to write configuration values to (and the .NET 1.1. framework even prevents this by not offering classes/methods to do so). Therefore, configuration is written to XML files using a..."As far as I understand, this is not true. I don't know about .NET 1.1 preventing this, but I remember in my last project that I did write configuration values to that file (I saved GUI contents there). My project was a small prototype, so maybe I did it wrong, but I do not think so...So what is the intended purpose of this file?
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Jan 10, 2009
how i can able to determine if the user intended to delete a file. What im going to do is this application will be placed in a certain folder together with some files. And this program will determine if the user inteded to delete a file within the folder.
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Sep 26, 2010
I have to develop a small app for which I have to create a user control which is intended to be something like a Table View.On Form Load, the user should be asked about the number of rows of columns required on the form.Once the user sets the number of cells, each cell should have a button and a Text Box inside it (grouped together).
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Oct 11, 2010
Ok for some reason I am having multiple problems with this code. The first issue is that one of the lines of code is seemingly ignored. Another issue is that some of the events are firing many times when they are only supposed to fire once. I have attached my code.
By the way, the string stored in AppSettings("WatchPath") in this case is C:Temp
Imports System.Configuration
Imports System.Diagnostics
Public Class Service1
[Code].....
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Sep 24, 2011
A common mathematical function is the Factorial function. The factorial function takes an integer input of "n" that is greater than or equal to 1 and computes n* (n-1) * ... * 2 * 1. In mathematical texts, factorial is denoted with an exclamation point, as in n!.For this exercise,write a function called Factorial that takes a single Integer input and returns an Integer corresponding to the factorial of the inputted parameter. To help get you started, your function will look like this:
[code]...
After you have written this Factorial function, add a Page_Load event handler that calls the function, displaying on the ASP.NET web page the values of 1! through 5!.Hint: The Factorial function will need to contain a looping construct from 1 to n, where, at each iteration, a variable is multiplied by the value of the looping variable.Now I'm not asking anyone to solve this for me but rather if you could help me understand how I should go about it. I'm not really understanding how I would loop and increment this function. Would I make the variables 1! through 5! equal to the given values and have them called to the equation and then loop it and increment it as so? I'm not even sure I'm thinking this out correctly.
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Jul 12, 2011
I am calculating the average of an array(double) using a known (smaller) array of integers, which contains the indices for the larger array to give the values for the average. Below is the function:
'
'NumLoops = Ubound(LookupList)+1 !
' i always >0
Function Mean(ByRef Y() As Double, ByRef LookupList() As Integer, ByVal NumLoops As Integer) As Double
Dim res As Double
[Code] .....
Stand alone performance (through a win32 project) form is very good for my project. e.g. a Y() = 50000 entries, LookupList=1000 entries, calculating the mean 1000 times take about 5 ms.
That beats a c++ function accessed through a rcw quite easily (takes >300ms). However, when I plumb this function into a larger project the performance drops off significantly, taking (typically) 50ms for the same test. Also if (say) I make Y bigger (say, 100 000 elements) with everything else the same I see a tiny overhead in the stand alone test (of order 1 ms), yet I see a close to linear increase in the calculation time in the larger project. The larger project is not so big (a few MB) as to make we worry about resource constraints.
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Feb 21, 2012
I am fairly new to VB and I am struggling with not using the Reverse string.I need to take a persons name from a text box and print the name backwards in a label using lop and the MID function.I have this, but it doesn't use the MID Function, how would I change it.
Private Sub convertButton_Click(sender As System.Object, e As System.EventArgs) Handles convertButton.Click, ClearToolStripMenuItem.Click
Dim Name As String = ""
[code].....
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Jun 8, 2010
[code].....
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