Using ListBox As Well As Getting A Calculate Button To Work?
Dec 14, 2010
Option Strict On
Public Class Form1
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
'The btnCalculate click event accepts and displays up to 20 hours from the user and
[code].....
I am using Visual studio 2008, and I cannot get the listbox to generate the lists, nor can I get the calculate button to do work. I click it, nothing happens. BTW this is coded the way the instructor directed in the audio cast that was published for the class.
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Nov 19, 2009
If I set a ListBox.Height = ListBox.PreferredHeight when the control is hidden and IntegralHeight = True, then set it visible:
a) Actual Height reduces by typically 3-5 pixels after redraw (but not 1 pixel per item).
b) PreferredHeight does not not appear to give the correct integral of item heights.
Is there a way to make ListBox calculate the correct integral Height before the ListBox is made visible, so it can be correctly pre-positioned from bottom edge?
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
ListBox1.Visible = False
ListBox1.IntegralHeight = True
[CODE]...
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Nov 21, 2009
I have a calculate function that adds twenty text boxes together a+b, etc... 20 +20, B changes value when a selection in combobx is changed, how can i make the calculate funtion work up selection change in combobox ? You would think the selection change or index change , but that doesnt work because the tetbox doesnt actually get the new value till after the combo selection is made, so you actually have to go and make the selection twice I know i can put the code in the textbox value change , but i dont want to do that for 20 text boxes and i am assuming there must be a BETTER way?
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Nov 8, 2011
I have buttons with values. for exmp. btn1 = 5.50 btn2=3.25 etc...when someone click on btn will ask how many of these and let say you say 3 it will multiply that with 5.50 and show it on listbox.
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Oct 25, 2008
I am having an issue with trying to calculate a running total from items in a listbox. I am getting an InvalidCastException with the btnCalc_Click event. I think I understand why I am getting this exception, just not sure exactly how I fix it.
I need to have the lblTotalCost display the Grand Total of all the workshop totals. Ca anyone point me in the right direction here, I have been struggling with this part for about 2 weeks.[code...]
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Sep 23, 2010
I got every other operation button to work besides sqrt, and percentage. I've done the same thing for addition, subtraction, etc. and it doesn't seem to work.
here's my globals
Public Class Form1
Private first As Double
Private second As Double
Private oper As String
[code]....
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Dec 18, 2009
I have a calculate button that, if clicked more than once adds the total of what I previously had to the new total as I am using a loop. I was thinking that I could get around this by only allowing the button to be clicked once, and if the user attempts to do this more than once a messagebox will appear saying that you can only calculate the price once and the form resets but i can't seem to get any code working.
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Sep 23, 2009
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub calculatebutton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculatebutton.Click
Me.Lblamountbalance.Text = Val(Me.txtowed) - Val(Me.txtpaid)
[code]....
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Nov 14, 2011
In my program I have the button "calculate" as the accept button, but I want it to switch to reset after it is pushed and go back to calculate.
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May 3, 2012
How does the last button work, heres my first, next, previous and last button codes"
next button:
[CODE]..................
previous button:
[CODE]..................
first button:
[CODE]..................
last button: *not working*
[CODE]..................
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Apr 6, 2010
This is the code that I have so far, the program works, etc.. How to delete the "Calculate Total Due" button and write the code so that the total due changes when any of the three options is changed/selected.
Option Explicit On
Option Strict On
Option Infer Off
Public Class MainForm
Private Function CalcResidentialTotalDue(ByVal premiumChannels As Integer) As Decimal
[Code] .....
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Oct 7, 2009
Is it possible to replace the calculate button with a statement so that the percent complete automatically calculates when a box is checked or the text box is modified?
I have not been able to find anything except a 'do loop' that even comes close.
Public Class Form1
Dim C1, C2, C3, C4, Tb, Tb1 As Decimal
Dim PctCmp As Decimal = C1 + C2 + C3 + C4 + Tb
[Code].....
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Mar 11, 2010
I have been given a project and i need to create a button to calculate N!. I've been trying to figure it out for a while now and I can't.
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Jun 27, 2009
I'm writing this prgram for class, and everything seemd to be working right except for my calculate button. It doesn't show the Calculation. Here is my code:
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculateTotalPay.Click
' declare variables
Dim hours As Double
[CODE]...
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Mar 17, 2011
I am creating an application that takes two numbers (lower and upper) and determines the prime numbers
Public Class primeNumber
Private Sub calculatePrimesButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculatePrimesButton.Click
'declare variables
Dim number As Long
[Code] .....
Once I hit the calculate button nothing comes up. I've tried adding the first code inside the function with the remaining code but no result. Now I'm putting the first code in with the calculate prime button. I am guessing there's a sqrt method that needs to be applied but I am not sure if it should be part of the function or the main?
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Mar 25, 2011
I am sure there is a better cleaner way to do this but again I am just starting to feel VB.Anyway, what I am trying to do is get the calculations to work in real time, the form loads with the default radio selection and when the user click the controls, the prices starts to change like add and subtracts.Using the button is also an issue since the increment on the check boxes goes up by one even when the user click on another radio button.[code]
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Jan 18, 2011
At my school i have to make a program and im almost done with it but everytime if i dont put any inputs on the program and press calculate it crashes. What should i write in the codes not to crash if all the inputs are empty.
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May 15, 2010
I find it difficult to create my own code. Am creating a program that will be able to calculate the sum of two numbers and display the results on the screen, i manage to create a code of clear and close button but for calculate i cant.
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Feb 26, 2012
I'm using Visual Basic Express 2010. I have the prompt, the textbox and the calculate button. For the answer do I have to make a separate label for the answer in seconds and the actual response "That will take (separate label for answer) seconds" I made a click event button and assigned the following as global variables at the start of the form:
Const intSpeed As Integer = 1207
Const intTime As Integer = 3600
Then I made a click event for the button. I don't know what the formula is. Basically the user inputs a distance in the box, the calculate button tells you how long it will take for the vehicle to travel that distance in seconds.
Here's the interface: [URL]
Criteria:
Are We There Yet?
The Thrust SSC, a super fast vehicle tracked at 1207 Km per hour (750 mph) was clocked on the Black Rock desert back in 1977. Build an application that will tell people how many seconds it would take to get to their destination if they were driving the vehicle. Of course this doesn't include having to stop for stop signs, travel through school zones, or slow down for corners.
You need to include the following:
1.) Design the application with a prompt label and textbox to collect the distance from the user.
2.) A calculate time button
3.) The form must have the text property changed to read "Are we there yet?"
4.) The objects must have both the Text property and Name property changed to an appropriate value.
5.) A constant global variable should be used to represent speed of the vehicle.
6.) A constant global variable should be used for seconds (there are 3600 seconds in an hour)
8.) A local Dim variable declaration can be used within the button click to hold the distance value.
7.) Variables should be declared with the most appropriate data types.
8.) Include a "Text Changed" event to reset the time in seconds to a blank value when the user starts entering in a new distance.
9.) Comment code should be included
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Apr 13, 2011
I'm trying to convert input and display in a label using a calculate button click.I need to take the input from the textbox add it to data inside a label and display it in a label (output). The data has to be validated for no negative or non numeric data. [code]Nothing is being displayed in the output label and only getting label with error msg???
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Dec 9, 2009
I want my calculate button to automatically click 4-5 times upon the user clicking it once because it seems that it only works properly if it is clicked multiple times...
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Dec 16, 2011
I created button "Calculate Pay" and under this botton I created a label (lblOutput).How should I wirte in lblOutput label to display what happens after "Calculate Pay" button is being clicked?
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Dec 14, 2011
how would you clear a listbox, like with a button.
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Feb 3, 2012
I have an assignment that includes some extra credit point by making a calculate button take four numbers, add them together and give a commission. I know what I did works, but I just want to make sure I'm doing it right! Let me know if I did something wrong
[code]Private Sub calculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculateButton.Click
[Code]...
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Jan 20, 2011
[code] Everytime i press the Calculate Button, it crashes on my first calculation part. What im trying to do is to not crash the program eventhough i have no input in it.
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May 26, 2011
So I am trying to code something in vb.net 2010 which will have a list box. For example:
1) Apple
2) Pizza
3) Juice
How would I display Line number 2 or any other to the user - I tried doing it with a label box like this Label1.Text = ListBox1.Text(2) - does not work.
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Jun 26, 2009
For some reason when I try binding the listbox to a datasource I put in (it contains a table of words to be used in the listbox), it shows me a + sign like it will allow my to drop text in but then it doesn't insert anything. Does this code not work for databound related things?
Private Sub ListBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBox1.MouseDown
ListBox1.DoDragDrop(ListBox1.SelectedItem, DragDropEffects.Copy)
[code].....
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Dec 16, 2011
i add this values to listbox
6
7
15
6
[code]....
but in button function when i press the key is shows me this:
15
5
6
6
[code]....
code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
ListBox1.Sorted = True
End Sub
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Feb 19, 2010
Basically on form2 i have a listbox. And on form3 i have 6 listboxes. I want listbox 2 to equal listbox (a listbox on form3) my current code does not work Private Sub formAustralia_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
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Apr 27, 2010
I have a multiple form application with a listbox on each form. I want to be able to select an item in one listbox on one form and then click a button and it show up in a listbox on another form.
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