How To Calculate A Running Total From Items In A Listbox
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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Dec 30, 2011
I'm developing Asset Management System, it will compute for straight line depreciation, my problem is how to calculate running total on each group that I've extracted from my database.Here's a snippet for my extraction of data
Private Sub cboAType_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboAType.SelectedIndexChanged
ListView1.Items.Clear()
If Not cboAType.Text = "-" Then
[code]....
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Dec 22, 2011
Is there a way in VS2010 to monitor net usage, and calculate the current/total download and upload while my application is running?
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May 24, 2012
I am trying to get a running total to come up in the lstGtotal listbox from the list of totals in the 1stTotal listbox but all that I am getting is the numbers 1stTotal listbox to come up[code]...
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Oct 6, 2010
The pay rates for the project are:
a. Level 1 - $10.00
b. Level 2 - $12.00
c. Level 3 - $14.00
d. Level 4 - $16.00
e. Benefit Deduction Rate - 0.10
f. Overtime Factor - 1.5
For ease of program maintenance, all of the above rates and factors must be stored in module level constants. All references to pay rates in the program must refer to the module level constants.
When the Calculate button is clicked:
a. The value in the Hours text box must be validated to insure that it is numeric value greater than zero.
1. If the value is not valid, a message box must appear as shown below and the user must be offered the option to continue processing or quit the program.
2. If the user chooses to continue processing, the focus must be set to the Hours text box.
3. If the user chooses to quit, the program must close immediately.
b. If the value is valid, the program must calculate and display the total pay in the Total Pay label.
1. The pay rate is determined by which Job Grade radio button is checked.
2. For hours less than or equal to 40, the total pay is the hours times the pay rate.
3. For hours greater than 40, the total pay is 40 hours times the pay rate plus the hours in excess of 40 hours times the pay rate times the Overtime Factor.
4. If the Full Time radio button is selected, the total pay must be reduced by the Benefit Deduction Rate.
5. The value displayed in the Total Pay label must be formatted with a dollar sign and with two decimal
places.
6. The focus must be set to the Hours text box.
Why i get an error when i try to run this code
Code:
Also the message box, both yes and no close the program.....
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Jun 8, 2011
I am using visual basic 2008 amd creatomg a datagrodview format like below [code] Now I wnat to get total balance in total column after less discount in percentage with ENTER EVENT proceedure and get the whole total column balance in a textbox i.e Net BalanceTextBox. Please tell me how to calculate discount in percent % and get total in total column and also tell me how to move cursor in next cell instead of bottom row in datagridview.
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Feb 8, 2012
I have a list of links and need to check some data in it.
i placed all the list in a listbox and each item is verified for some result
now i want to see how many items are processed and how many are still need to process
Example: in a label it must display total count of items and items completed and it must change once a item is finished.
over view of my code is:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
For Each item In ListBox2.Items
[Code]....
Once an item is finished label must change the count.
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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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Apr 28, 2009
I am using VB.NET (version 2008). I have two types of items populating in a listbox (checked listbox). For example: lets say one is type "A" and other is "Type B". Their names maybe same so if the user sees those items in listbox then he won;t be able to determine their type until he click on them and checks out its properties. I wanted that I add each item to listbox and colour them so that blue for example means type "A" is there and red means the other. So this way I will be able to know at a glance that how many item of what type is present. I guess it may not be possible to do that in a standard checkedlistbox. I am also using component factory's krypton controls which enhance the gui of an application. But I dunno if I can progress using that.
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Jan 6, 2012
I have many time result in my hand... like
10.10.23 (hours,minute,seconds)
01.14.15
How can i calculate total time?
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Nov 30, 2010
I have a sql SELECT statement in vb.net. I have this line of code to calculate a specific percentage of the Net Total:ROUND(Invoices.NetT*'" + txtOnGoing.Text + "'/100,2) As Commission 'txtOnGoing is a text box which pre populates a certain number e.g '10'... this means 10% of the NetT column..The above code works fine, now I want to add the "Commission" Column and display the Total in a text box. Does anyone know how to do this? I know I can use the SUM operator but because the Commission column isnt a column that actually exists in the table I dont know how I could do this.
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Apr 19, 2012
I'm having some trouble firstly trying to calculate the total of a column in the database connected to my vb.net project. Then I want to divide that total by the number of items in a listbox. This is my code so far:
Private Sub btnavresult_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnavresult.Click
Dim sqlx As OleDbCommand = New OleDbCommand
[Code]......
I get an error saying "No value given for one or more required parameters." when I try to run my program on this line "Dim rdr As OleDbDataReader = sqlx.ExecuteReader()"
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Jun 10, 2009
I have two textboxs are formated to decimal type. i want create thirth textbox and get total of above two textboxs. how can i do that.
[Code]...
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Dec 6, 2008
How to get the total sum of my fields that are not duplicated? The highlighted are examples of my duplicated fields (both lec and lab) but they don't have the same time.
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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 6, 2009
This should calculate and display the total amount due. There are 3 radio buttons, A, B, C. Nonprofit should get a 20% discount from final charges.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles radA.CheckedChanged
[Code] .....
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Jan 8, 2010
The program is for calculating an amount of fruit. I have a label saying the name of the fruit, a textbox to enter a value of 0-99 and another textbox with ReadOnly which will show the price.
A little picture here:[URL]
As you can see, the Fruit1 Etc... Is only the fruit name.
The Text box wich indicate 1-99 means the number of fruit.
The Textbox with Cash on it, means the total price.
The Calculate button, when I will push it, all the total price from all the fruit will be added together to form a total price which will be indicated in the total price textbox under the Calculate button.
When I will enter the number of fruit, if I enter 99, it give me a price.
When I will enter 60, I want that the 60 are multiplied by (let say) 0,10$
I just like to know how I can do this... Its really bothering e and I don't want to calculate all the things and make 99 line for 1 fruit cause it will be long.
The code I was using was:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.Text = "99" Then
TextBox2.text = "10.00$"
Elseif TextBox1.Text = "98" Then
TextBox2.Text = "9,90$"
EndIf
End Sub
Until the the number of the fruit in the code reach 0. So its very long.
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Apr 13, 2009
I have successfully written this interest calculation, although it is based on the ppmt function and adding up the interest from each payment. This is quite a long looping process.. And it is not accurate because of the rounding of each payment. I was wondering if someone knows if there is a formula I can use, or if the pmt function is capable of this? (e.g. Mortgage payment - total interest payable over 30 years at 5% ( principle and interest repayments))?
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Jun 15, 2009
In my form I have Gross Earnings Calculated. Then that goes to a label. I then click a button to Clear Current Employee. Then I can input another employees info to get that employees Gross Earnings. Well when I click View Summary I want to display a Total Gross Earnings. The Total Gross Earnings should be a Total of all Employees Gross Earnings.
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Jun 21, 2010
I have a class assignment where i have to calculate the total cost of a parking garage from hours but i have to do it with a method function. So this might be a stupid question but can you read the user input values from a textbox in the function itself or do they have to be read in and recalled from the Private Sub Button1_Click section?
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Apr 4, 2010
tell me what is wrong with this calculation. I am fairly new to vb.net so i'm not particularly clued up! I am using it to calculate the total fare of taxi journeys.
[Code]...
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Oct 13, 2011
I want to calculate the total for bill amounts in an arraylist. I have already used this code:
[Code]...
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Jun 23, 2011
my question is regarding a calculation and control display that I am doing.
The application is a project tracker, and I am trying to calculate the total spend of the project and display it on either the first tab if it is an open project or the second tab if it is a completed project. For some reason, it is showing 0 for all but one of the projects. If anyones eyes can see the problem I would be really greatful. The code is below
[code]...
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Aug 15, 2011
i want to calculate total salary according to attending days.
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Mar 14, 2010
I am creating a report in vb.net using crystal reports and need help on finding sum of dailyworkhrs in my crystal reprot. I have a feld which calculates dailyworkhrs and now i would like to find the total of it. For example:
07:30:12
08:30:10
OUTPUT Should be
16:00:22
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Nov 8, 2011
When I enter the quantity variable the script will not calculate. What am I missing ?
Public Class frmMovie
Private Property intQuantity As Integer
Private Sub txtName_TextChanged(ByVal sender As System.Object, ByVal e As [codee]....
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Jul 25, 2009
Now my programm is finish and have full function, but.... it is sooo slowly with dataset/datatable/query-creater. Before I used DataContext like:
PUBLIC CLASS Main
Private db As New KontoauszugSQLDataContext
.
.
.
Privat Sub LaufendeSumme ()
[Code].....
This works much faster. May be something wrong with System or is this normal? I think it must be quicker to get a queryresult with dataset/datatable/query-creater then with the DataContext version and its update.
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Jul 22, 2009
i want to calculate the total sum of each datarow in a DataRepeater.[code]
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Feb 14, 2010
For my programm I was told to do a programm to calculate the total and average rainfall. I have done so, but now I am supposed to use two function procedures to calculate the total and average rainfall. I can not seem to figure it out and it is very frustrating.
[Code]...
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Feb 19, 2012
I'm trying to calculate the total cost for gas for a Chevy and a Buick on a form. The total miles is 21 for city and 33 for freeway. I'm also putting in the mpg for each, for city and freeway. How would I set up the labels to display the right amount? Do I use If Then statements?
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