Calculating The Sum Of Number Difference Within A For Loop
Dec 28, 2011
I have a dataset which includes some numbers, I want to calculate the sum of the difference in the numbers how do I do this? For example my dataset looks like this:
[Code]...
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Nov 12, 2010
I am trying to flag rows in a grid in the following order based on a date column
When 2 or more days old from today
then RED
When 1 day old then YELLOW
When 0 days old then GREEN
When the date is in the future then
BLUE
I have the following which is working fine except for the future dates which are GREEN instead of BLUE.
Dim myDate As DateTime = CType(grdSummaryView.GetRowCellValue(e.RowHandle, "myDate"), DateTime)
Select Case Now.Subtract(myDate).Days
'2 or more days old then RED FLAG
Case Is >= 2
[code]....
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Oct 19, 2011
I am trying to calculate the difference between 2 times.
So far I have 4 labels.
Label1 = Current date and time.
Label2 = Contains the exact time that the application was last closed.
Label3 = Contains the exact time that the application was opened.
Label4 = I want this label to say how much time in seconds had elapsed between the application last being closed and the application being opened again, in other words the difference in seconds between label 2 and label 3.
Below is what I have done so far, but despite repeated efforts I can't seem to find a way of getting the time difference to show in label 4?
[Code]....
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Dec 12, 2008
The interest is compounded monthly and these are sample inputs and output.
Input:
Monthly Deposit: 300
Annual rate: .05
[code].....
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Jul 14, 2010
I have the following VB.NET Code:
Dim Date1 As New DateTime(2010,5,6)
Dim Date2 As New DateTime(2009,10,12)
Dim NumOfMonths = 0 ' This is where I am stumped
What I am trying to do is find out how many months are between the 2 dates.
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Jan 13, 2012
[Code].....
What is the major difference between 'for each' and 'for' loops in .NET? Is there any performance gain while comparing these two? Which one gives a better performance/faster/memory management?
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Dec 30, 2009
I just discovered the DataTable.Select-function, and boy I'm glad I found it! It makes my code run several times faster. But, I don't quite understand why it's so much faster than my previous code. In my first code, I looped trough my DataTable to find the specific row, like this:
[Code]...
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Jun 4, 2009
Someone had coded a project in Java. THis was just a calculation that looped through 1000 iterations. We had done the same thing in Vb.net.Does anyone know the speed difference between Java and Vb.net for a long calculation loop? I had heard Java was very slow.
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Nov 20, 2011
How do I calculate the difference between two dates to display as a number in days?I have 2 text boxes (txtHStart_Date & txtHEnd_Date) I have used an Ajax Calendar Extender to enter the dates in each of these text boxes.I would like to get the difference between these two dates to show in a seperate text box (txtNoOfDays)
I've seen the timespan function but can seem to get this to work. I'm not to sure how to declare the text boxes as the dates I would the calculation to be made from
Code:
Dim D1 As Date
Dim D2 As Date
Dim ts As New TimeSpan
D1 = txtHStart_Date.Text
D2 = txtHEnd_Date.Text
ts = D2 - D1
But I know this isn't right. I also don't know how to get it to display in the 3rd TextBox.
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May 25, 2010
I'm slowly learning about loops. I have a couple of questions
1) When a condition is being tested.. what does that mean? I don't understand the "condition" word.
2) What is the difference between a loop that never ends and a loop that ends?
I have the code for the loop that ends and the loop that never ends. I can see the difference in the code, but I don't understand what is making it different. Here is the code below.
[code]...
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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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May 17, 2012
I am trying to loop number into something like this.
0
12
345
[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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Sep 29, 2010
learning about loops (still a beginner) in VB.net. I have got the below code and basically it is meant to stop the loop once it reaches a number above 20. Now, the problem is that it does stop after number 20 but the last number that is displayed in the list is always above 20..... how I can stop it showing the last number as above 20?
[Code]...
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Dec 15, 2009
Looking for a bit of help here. I know my If...Then...ElseIf statement is somehow off, but not sure how. Could someone point me in the right direction? I know I am almost there but need a nudge in the right direction.
[Code]...
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Jan 12, 2010
I have a button that searches through a binary file to bring up customer information with the following code:
[Code]...
My problem is, I need to create a variable which holds the record number, so that the record can be edited, and put back into the file at its previous location, how would I implement this? Not sure about the code.
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Dec 9, 2011
i have to create for loop that create each time a new GroupBox with new name and location this is not a homework.it is a personal Application to manage my information [code]i have to change the name of the first Dim in the loop each time , but i couldn't.
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Feb 10, 2009
Is there a way to loop words for a number of times (like i want to loop a word for only 10 times....How would I go by doing that?)
Quote:
Originally Posted by EXample Like I want to have a textbox and If i put 10 in the textbox It would loop the word ten times or is I put 20 in the textbox it would loop 20 times ..and ..etc...and ...etc...
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Feb 21, 2010
I am using some arrays that are pre-filled and I am having a random number generated between 0-10. That random number will then go in to all 5 arrays and pull the item from that location. I think try to take the sentence that is generated into another string. Once that is complete I then go through the final array to pull all the sentences and concatenate them together.
Currently I've only been able to get 1 sentence to print out of 5...a fresh pair of eyes would prob see where I am going wrong...I've been at this for awhile and wouldn't mind some advice to where I am going wrong.
Public Class MainForm
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[CODE]...
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Oct 3, 2009
I am doing a Coin Toss program for school and I'm getting my butt kicked by this thing. The following are the instructions exactly as my instructor gave them:Use the random number generator (see the code below) to simulate a coin toss. First ask the user for the number of repetitions. Next, set up a For loop to execute that many times. Each time you enter the loop, call the random number next method. Assume that a random value <= 5 is considered a "Heads"; a value >5 is a "Tails". That is, if the random value is <= 5, add one to an accumulator named intNumHeads. If the random value is >5 add one to an accumulator named intNumTails. When the loop finished, output the number of heads and the number of tails in a text field with appropriate labels.Dim intRandom As New Random()Dim intNumber As IntegerintNumber = intRandom.Next(0, 9) In my application I have the click event of the "Flip Coin" button coded as follows:
Public
Class frmToss
Private Sub btnFlip_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
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Feb 16, 2009
I need a random number of 6 (1 ,6), and to loop it 3 times. I tried this but it gives me error for - if myRandom.next(1,6) Then:
Dim myRandom As Random()
For i As Integer = 1, 3
If myRandom.next(1, 6) Then
End If
Next
Also I need to know the code for putting a picture into a picture box.
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Dec 1, 2009
A Visual Logic flowchart that requests a positive integer as input, and carries out the following steps:If the number is even, divide it by 2. Otherwise, multiply the number by 3, and add 1 to the result. Repeat this process with the resulting number, and continue repeating until the number 1 is reached.After the number 1 is reached, displayed how many iterations were required to reach the number 1. (Hint: a number is even if number Mod 2 = 0.)
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Aug 13, 2009
What is the maximum number of executions in a while loop in VB.net that it will allow? Meaning, it is checking for a variable to equal some value, but that value never comes? How many times will it execute the code before it quits? Is there some way to set the maximum number of executions without terminating it programmatically?
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Apr 9, 2012
I want to be able to reveal and then populate a certain number of labels. The inefficient way would be to SELECT CASE on the number of labels required and then populate these in turn. I am looking for something like this:
For i = 1 to RequiredNumOfLabels
Label & i.visible = true
Label & i.text = DataTable.Rows(i).Item(2)[code]......
is the problem as after the line is executed, lbl still equals nothing.The reasoning behind it is that I was trying to create an invoice generator in vb.net and I was hoping that this would be a simple way to do it - count the amount of items in the order, populate the labels with the names of the items, reveal that many labels.
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Jul 12, 2009
How do you add an arbitrary number of controls to a form at run time? With indexed controls I could define the 'seed' control at design time and reference 'clones' of the 'seed' control at run time via the index. Now I must declare each additional instance of the control at run time then set each individual property that differs from the default for that control for each instance. Then I must add the newly declared control to the appropriate container controls collection. I'd like to do this in a loop but how can I get away from using a fixed control name in the declaration:
Dim controlname As New Control
I can't use a string that I can manipulate the contents of for controlname because it sees it as a double declaration. I can't use an array such as Control(index) for controlname. Dim Control(maxindex) As New Control doesn't work. Dim Control(maxindex) As Control works but any assignment based on this such as Control(indexvalue).Name = "ControlName" fails. It didn't address the issue of handling the declaration of new controls in a loop with some kind of variable name for the control.
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Dec 8, 2009
I have already a Pretest loop that counts the number that the user inputs and displays a message. I need to change the Pretest loop code so it will count down instead of up from the number of times entered by the user.I have already coded this:
vb.net Public Class frmMain Private Sub btnExit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExit.Click Me.Close()End Sub Private Sub txtNumTimes_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtNumTimes.KeyPress
[Code]...
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Jun 18, 2009
I want to write an Excel macro to set print formats in all worksheets in a workbook. I don't think you can do this by grouping; it appears you have to do it in each individual worksheet. I want to be able to run a macro in any workbook to loop through all worksheets in the workbook and then select the first worksheet.
How do you have the macro determine how many worksheets there are and set the loop counter equal to that number?
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Jul 2, 2009
I have a form with a textbox, a button and a label. If I put a number in the textbox this number shows in the label but after that the label start to countdown from that number to zero.
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Mar 26, 2012
I would like to loop through a number of integers to display the higher number, I would not know the higher or the lower number. How could I compare them to pick the higher one.
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Dec 22, 2009
For Each Ctrl As Control In Panel20.Controls
If TypeOf Ctrl Is CheckBox Then
CType(Ctrl, CheckBox).Checked = False
ElseIf Ctrl.HasChildren = True Then
Uncheckboxes(Ctrl)
End If
Next
I have a few panels that contain the controls, how can I check them all at once rather than use that code above and just change the panel number each time? It'll get pretty messy if I have to keep pasting all that code and just changing one number.
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