Accumulator And Calculations Are Not Working In VB 2010?
Apr 13, 2012
OK, so my accumulator is now adding and showing properly in the form as a total. However, something is wrong in my if... then statement and it's not throwing it to the 2nd level after reaching the 125.*Edit to show updated with the Do While Loop. Now causing issues with my input error msgbox... *
do while decTotalCredits < 125
If IsNumeric(txtCredit.Text) Then
' This statement will convert the string entered to decimal and establish the
[code].....
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Apr 11, 2012
My accumulator (decTotalCredits) is not working properly and is resetting to zero with each entry. I am needing the accumulator to add in each user input until it hits 125. As it normally is, I'm sure it's something small.
[Code]...
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Nov 30, 2010
I am currently going through Murachs Beggining .net programming book. I am trying toimplement an application for an exercise at the end of chapter 5. The applicationspecification is as follows.
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Apr 17, 2012
I cannot figure out why my calculation is not working. I am doing for 1 to 12 and it gives me 12 inputs but counts my entries as 13? What am I missing. If I change it to 0 to 11 same thing. I am not sure what the issue is, but I cannot see it, and am not sure where to look.I need to end up with 12 cycles through and intEntries to be 12.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'initialize accumulator
Dim decEntries As Decimal[code].......
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Feb 4, 2011
I am working in Visual Basic 2010 Express and have a table with 3 columns created using a SQL dataset called 'test' if you like.The table columns are called A B and C If someone enters a value of 10 in A and 15 in B, is it possible for column C to automatically add them up and come up with 25? - if so how do I start?The above is only a simple example of the problem I have, but once on the right track I am sure I can apply the same logic to the table I actually have?
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Oct 6, 2011
I seem to occasionally find myself trying to compare two List(of T) to see whether or not they contain the same elements. A quick check of the documentation shows the SequenceEquals method, but that appears to check whether the two lists have the same length, and have the same elements in the same order. I don't care about the order. I want to know whether two collections have the same elements. Doing this is not terribly difficult, and seems common enough, so I was expecting that there would be some function that handles it.
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Jun 28, 2010
I have a database (SQL Server 2008) with multiple tables and records. 1 Table contains all kinds of invoice items, which have a unique id, Client ID and invoice number.
My goals is as following:
- I want to show the invoice items in an datagrid, all merged as 1 invoice item (showing date, total without VAT, total with VAT, VAT percentage, VAT value and if the invoice has been paid or not.)
- The datagrid should only contain the invoices for a specific client.
- Should add up totals (Amount paid, Amount not paid, Amount Overdue, Total Amount)
- Should be withing specific date range.
Everything in this table has been saved as varchar except invoice id and unique.
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May 12, 2011
I'm trying to make a program that uses Ohms circle to calculate varying data regarding electricity, I think that if you look at my code you'll get a good idea. The problem that I'm having is that I'm using On Error Resume Next so the program will automatically find the valid calculation to calculate the value for the variable, but what's happening is that when it divides by zero (the default value for variables with no value) it gets Infinity, which it has decided IS a value, but I don't want it to be, I need a runtime error so it will bypass that calculation and go on to the next one.
'Skip erroneous statements and continue on to next line of valid code
On Error Resume Next
'--------------------------
'VARIABLES
'--------------------------
'v = voltage
[Code] .....
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Jul 16, 2010
Does anyone know how to store data from a RTD server into a array for calculations...?
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Sep 19, 2010
I'm writing a program for my class, which pretty much is an energy cost calculator. It takes 4 inputs from 4 text boxes and multiplies them, and the result is the cost. Well, now I have to come up with a way to check for empty text boxes and display a prompt to enter a number. I've tried inserting multiple codes to display a prompt and to no avail nothing has worked, I also receive the error "when casting from a number, the value must be a number less than infinity" error.
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Feb 21, 2011
It's being some years since i actually wrote a program in VB, last time was VB 6.So it's being a long time, and things have changed a bit.And i am still very rusty, so i need to get back into it.I got a few problems which i cant remember very well.1st question.I got several text boxes, in these text boxes there will be prices of products.The very last text box is inactive, and is supposed to show the total of all of the above.I have to declare the text boxes to contain numeric values only, so there will be no mistake when doing the calculations.But i cant remember what it was, and what the best option is to add up all the values from the text boxes.
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Mar 12, 2012
Which is the most efficient and speedy data structure in order to carry out calculations on it?. I have seen, collections, arrays, list arrays, databases and more. I would prefer to write just straight forward code that will be effective and which I can still understand. What I would like to do initially is have the ability to add new draws to the end of the file, edit the individual files and delete lines if required.
File would then be reformatted to show the corrections made. Some kind of data entry window is envisioned. As far as number crunching goes, I would like to make counts of each number in each of the columns , calculating averages, times since last drawn and so on.
Without being too long winded, I would eventually like to find triple combinations and maybe use them as predictions. So there you have it. This way I won�t have to go off on the wrong path, on a data structure that may not be able, or be too slow for the tasks at hand.
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Apr 6, 2012
This is the Project that i have to make. Create a project that will input an employees sales and calculate the gross pay, deductions, and net pay. Each employee will receive a base pay of $900 plus a sale commission of 6% of sales.
After calculating the net pay, calculate the budget amount for each category based on the percentages given in the tables below:
Your Form should use text boxes to input the employees name and the amount of the sales and also use text boxes to display the results of the calculations. Provide buttons for Calculate, Clear, and Exit. Display a message to the user for any bad input data. Now i want to know for constants its going to be : commission sale, deductions and everything in Budget? I am also guessing that for the gross pay its going to be the" Gross pay = base pay * Commission" ?
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Nov 16, 2011
code to use to add an accumulator so I can total up the items in my shopping cart?
Public Class MainForm
Private Property LabelText As String
Private Property ValueType As Integer
[code]....
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Nov 7, 2009
This is for vb.net I've been working to develop a system which involves computation.What I've been trying to develop in my program is, I have a textbox where user will enter a numeric value,there is a button and a label below and in the first place the label should be set to zero. Everytime you enter a numeric value in the textbox and click the button it should add the value in the label and should save the value in the label so even if you exit the program whatever the last value displayed in the label should remain the same when run the program again,I believe it requires a database to save the value.Basically its like with payment system which saves the total amount of all payments made.
This is how should it works,say for example,if you will enter 1,2,3 it should save the sum value which is 6 in the label even if you close the program and when you run it again and enter another value it should add to the current value which is 6.
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Mar 23, 2010
I am having some trouble with my program that I am doing. I am supposed to code the application so that it creates a report which I have done. Now the problem that I am having is I have to use an accumulator for the total sales amount in the access file. I am stuck on how to have it say "Total Sales:" and then have the accumulator with the ammount of $32000 next to it becuase I have to use the accumulator to total the sales.
[Code]...
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Nov 16, 2011
the code to use to add an accumulator so I can total up the items in my shopping cart?
[Code]...
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Apr 25, 2010
Okay my assignment is to change a code up using two functions instead of a subprocedure to calculate total rainfall and avedrage rainfall and then to add a startover button to the application which not only clears all the labels but also clears the counter and accumulator. This is what I have gotten so far my functions do not work and I can get the labels cleared. I just can't get the counter and accumulator to reset back to zero
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Apr 23, 2012
I am trying to maintain a total for multiple collection objects in a class. When I create a new object, it resets the total to zero, only adding the current value being passed to the function. I have tried to use a static variable, create a second variable to hold the old total while adding the new value. The base class holds the total value, while the sub class creates the new object that holds information. I am passing the new value to a function in the base class adding the new value to the total when each new record is created.
[Code]...
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Jun 6, 2011
i am trying to teach myself vb (im only 14), and i'm not having a easy time. What im trying to do, i need a user to define a upper and lower bound of a range. From there i need to generate random numbers, a certan number of times, with in that range...this is my first problem.And then, i need to make counters to store/test all of these variables as even, odd, positive, negative and zero's ...that i need to append to a richtextbox to show how many of each. Im not even sure if rtb is the right object to use...you know, instead of textbox, or label?the last thing was to do with Private function as boolean. do I need this to test these variable?
[Code]...
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Nov 30, 2010
I am currently going through Murachs Beggining .net programming book. I am trying to implement an application for an exercise at the end of chapter 5. The application specification is as follows.
[Code]...
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Aug 4, 2011
How to update the total cost after every item is selected and the user clicks enter...
Private Sub calcbutton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calcbutton.Click
Dim amount As Double
Double.TryParse(amounttextbox.Text, amount)
Dim total As Double
[Code] .....
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Oct 15, 2010
I've actually gotten this program running on paper, BUT, when I try to write a code for it, it doesn't work . . . somewhat . . . When the user clicks the compute button, the total value of inventory is computed by multiplying the cost per item times the quantity of the item and then adds the result to the value in an accumulator variable.
So far this is what I've come up with:
CODE:
The quantity and cost per item is suppose to multiply each row, but it only multiplies the first row.
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Jun 21, 2012
I've used this function to send email successfully
Private Function SendEMail(ByVal wholist As String, ByVal emailcontent As String) As Boolean
Dim emailSuccess As Boolean = False
Try
[Code]....
But with a new server my customer has that uses EXCHANGE 2010 it does not work.
I used TELNET to get into port 25 of the exchange server and it seems that it gets a CLIENT WAS NOT AUTHENTICATED error.
Anyone use SMTP with EXCHANGE 2010 yet???
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Apr 20, 2012
In this case GDI no longer stands for Graphic Device Interface! I have an MDI form, and the child form loads up with a single panel positioned at a specific spot so that i can have a visual studio styled menu on the left side. The square white area is the panel with the fields in it for the user to enter. The left side is a TreeView with GDI lines drawn around it that dont appear until the menu has been changed. Here's what the menu looks like when its rendered properly:
When the form first loads, you can quickly see the GDI drawings come up (sometimes) then disappear. It flashes pretty quick when you can actually see it, but until you change the menu item to another causing it to redraw, its just... gone.. Looks like this:Here's the setup:I have two labels docked at the top for the large white text with a black background
There's the treeview on the left in a picturebox where the GDI components are drawn, and a panel touching it on the right side, which is sized and anchored on all sides basically keeping it stretched to the size of the window while keeping the top and left side pinned in position so it doesnt move, keep it touching the menu on the left.
Inside the panel is 10 more panels, one panel for each menu item. Each panel is programmatically set to resize to 1024x768 and becomes visible once the menu item for that panel is clicked. The panels are all programmatically top positioned at 0 and left positioned at -1 to hide the left border stroke from having the BorderStyle set to FixedSingle. Moving it to -1 hides only that border within the panel its in.
I have dual monitors, so i began stepping through the code on one monitor with the program running on the other so i could see what its doing with each step. While going through, at one point i see the contents of the TreeView completely vanish, but all the drawn GDI stuff is there. Once i get through everything and finally hit F8 on the very last line when control of the program is given back to me because its now waiting for me to do something, all of a sudden the treeview contents re-appear and the GDI drawings vanish.
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Apr 20, 2010
I just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).
It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.
For example... I write this:
[CODE]....................
Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.
So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.
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Sep 18, 2007
I have a DataGridView which displays info from a Database. I need a couple of the columns to be able to do basic calculations such as +, - etc - nothing more complicated really. I am a bit stuck as to how to gte this working.I have tried the code below with no joy:[code...]
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Aug 7, 2011
I am doing homework, but i've done the work already. My Issue is, I cannot get my program to compile the calculations for the payments properly. Maybe I'm just too tired to see it, but It should be working from my view. Here is what i have so far...
Module MortageCalculatorWK5
'Loan Amount Input
Dim LoanAmount As Decimal = 200000
[Code].....
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Jun 6, 2011
I'm very new to programing and am having problems trying to perform some calculations with a list. I have read in an array into a list with a count attached to each item example: "xxxxxx(intcount)". What I'm trying to do it use two xxxxxx(intcount)'s at xxxxxx(intcount+5) and xxxxxx(intcount+25) and use these two variables to calculate yyyyyy(intcount) but it isn't working. I understand this may be a stupid question but could someone please point me in the right direction.
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Jun 23, 2010
I recently got microsoft expression studio and VS 2010..To test out expression, i created a sweet looking UI, and transferred an old program from VS 2008, but the CSV writing function I have written in the '08 doesn't work with my WPF form in '10.
CODE
Private Sub ReadTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReadTimer.Tick
CurrentPosition.Read()
CurrentPositionValue.Text = CurrentPosition.Values(0).ToString()
[code]....
specifically, the error is, "Computer is not a member of My" ....
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