VS 2010 - Need Runtime Error When Dividing By Zero In Calculations
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] .....
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?
I have a Visual Basic 2005 program which runs fine if I execute the built Executable. However if I start the application in VS2005 debugger it gives a weird error
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
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.
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.
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.
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.
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.
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" ?
I have a fairly small double and a fairly large double. When I divide the large one by the small one and display it with Console.WriteLine, it always shows exponential notation. Can I display the non exponential notation form?
How easy it is to "split" a bitmap into separate parts?Here is a bitmap that was generated by a program - the red pixels that you see are purely red, there are no other colours.I want to know if the left side is "redder" than the right side. (Actually I want to be more precise than that (but I can figure that out on my own))So, I think that "splitting" the bitmap up into sections like this: would be the best way to do it then I can count the red pixels in each section.Here is the part of the code snippet that produced the bitmap you see above:I think I might be able to modify this easily to count pixels, if I know how to split the bitmap into section thingies.
Dim are_identical As Boolean = True Dim eq_color As Color = Color.White Dim ne_color As Color = Color.Red For x As Integer = 0 To wid - 1
1. Doctor Start Time 2. Doctor End Time 3. Doctor Appointment Duration
I want a 4th combo Box that will Start from Doctor's Start Time upto Doctor's End Time with the interval of Appointment Duration eg. Suppose the Start time is 08:00 and End Time 10:00 with 24 hr clock the appointment duration is 30 mins then the 4th comboBox should Display
08:00 08:30 09:00 09:30
I have done this coding on the basis of Appointment Duration
Dim da As DateTime = FormatDateTime("00:00") cboAppTime.Items.Clear() If txtDuration.Text = "15" Then
i am controlling the hue and saturation of the backcolor of the form with scrollbars:
Private Sub tbHUE_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tbHue.Scroll Dim r, g, b As Integer HSVtoRGB(r, g, b, tbHue.Value, tbSaturation.Value / 50, 255)
[code]....
i would like to know what is the purpose of dividing by 50?
i have created a com class library with vb.net. i have registered the dll with regasm. Then i imported and used it to a vb6 project. I have noticed that if i unregister the library and register it again then i get the following error:
In order to make the library usable again, i have to rebuilt the library with different ClassId, InterfaceId, EventsId at the classes and then register the new dll.
PS: it also does the same thing if i overwrite the registered file with the same file or if i rename its folder and then rename it back to its previous name. Rebuid and re-registered is needed.
im trying to learn how to made stuff with currency.For example:I divide 10.000$ by 12 Months, rounding with 2 decimals i have 833,33 $.If i multiply 833,33 $ * 12 i got 9999,96 $, so there is 0.04 of possible loss. Rounding the 9999.96 with 2 decimals of presition i got 10.000 $ but that's what i don't want since 0.04 is a loss.Im using SQL Compact 4.0 as database, the price_month table is decimal(18,2)
Here is my code:
Dim price as Decimal = 10000 Dim pricemonth as Decimal = Math.round((price/12),2) ' 833.33 Console.Writeline(pricemonth*12) ' 9999.96 Console.Writeline(Math.round((pricemonth*12),2)) ' 10000
I've came across to quite an unusual problem with dividing integers with double variable. I've created For loop where to sum-integer interval -double is added. When sum reaches certain number text is displayed as showed below:
I was wondering how I can make textbox1 get divided by textbox2 at the click of button1. The number will go into textbox 3. I was also wondering how I can make the number round up or down. I also want all three text boxes to only accept numbers.show me the code in an easy to read format.
I've read a lot of different questions on SO about multithreaded applications and how to split work up between them, but none really seem to fit what I need for this. Here's how my program currently basically works:
Module Module1 'string X declared out here Sub Main()
[Code]....
This is only a rough outline of what actually happens in my code by the way.
My problem being that if multiple threads start running Main2(), they're dealing with the same X value as in the other threads. The loop inside of main2 executes multiple times per millisecond, so I can't just stagger the loops. There is often duplication of work done.
How can I properly divide up the work so that the two threads running simultaneously never have the same work to run?
vb Private Function calcArea() As Decimal Dim height As Decimal Dim width As Decimal ' assigns user input from the two text boxes to the two variables Decimal.TryParse(heightTextBox.Text, height) Decimal.TryParse(widthTextBox.Text, width)
[Code]...
All I did is change the multiply symbol to a divide symbol and now when I try to divide the two Decimal variables Visual Studio says, "Option strict on disallows conversions from 'Decimal' to 'Long'." Not sure where this conversion is happening.I know I'm missing something simple (once again) so if anyone has any advice please let me know.
I have a stopwatch in my program. I start the stopwatch with the start button I created. When I stop it it gives the results of the time in a label that I have named labelTime. I have a Calculate button I have created. I also have a label I have named calcResult. I want to click the Calculate button and divide the stopwatch result (labelTime) by 60. I want the results of this calculation to be displayed in the label calcResult. I keep getting errors saying labelTime is a string value. I believe I will need my calcResult to be a Decimal.
What is the proper way of working with percentages and DataGridView and dividing by zero..In my code I am attempting to divide two numbers, sometimes one of the numbers is zero..Then I need to add a column to my datagrid, I think i need it to be decimal? So i can sort it later. I had it as a string and everything worked fine excpet i couldnt sort properly.[code]If I change column to Double it handles it fine, then i am not sure how to read the value as a percentage?
I'm trying to do this division and the result to be displayed on a eight decimal number.
Dim r1 As Integer Dim r2 As Double r1 = Val(TextBox16.Text) r2 = r1 / 60 TextBox18.Text = FormatNumber(r2, 8)
The value or R1 on this case is 273.4 but it varies according with the result obtained so I can not allocate a constant number to r1. The problem is the result that I am getting is 4,55000000 instead of 4.5566666
I work for Southwire Company. We are owners and developers of a program called SAG10. It is set in VB6. When trying to run this program on Windows Vista, I get a runtime error 440. Not all installs on Vista behave this way. I have had multiple successes in installing and running SAG10 on Windows Vista. I have changed settings to mimic the successful runs and I still get this error. I have disabled the User Account Contro
trying to get my hands wet on vs 2010 and i downloaded samples from ms site but when i tried to run some of the DB samples i received this sql error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) any ideas how to get around on this?
I just converted my project over to 2010 from 2008. Everything seemed to be working fine (no errors came up). I ran the program and found no run time errors either. I then proceeded to update my program by adding user controls. These controls where already used by the program (through references), but were originally external. Due to issues with them not updating updating (no matter what I tried) I decided to build them directly into the project. This did not cause any issues at first, the program continued to run without errors or execptions. I replaced some of the old controls that referenced the external project with the new internal ones. The old ones were completely deleted first, and then the new ones (named same as the old ones to reduce programming errors...and yes I am sure the names are spelled EXACTLY the same) were added.
Now, the progam is throwing an exception during the variable declaration of a form I had been using with no errors: "Unable to cast object of type 'OldControl' to type 'NewControl'". I have run into cast exceptions before an am fairly good at solving whatever the problem is (usually a simple issue). Here is the kicker (actually 2 kickers)... First, NO LINES OF CODE HAVE BEEN CHANGED from when the program was working fine. I have basically changed out 'old_textbox' for 'new_textbox' in the graphical interface (and have given the new ones the old one's names) and made sure no errors came up (which didn't happen). Second, this exception is being raised on a line that has NOTHING to do with the old or new control: Public AllowCopiesMode as Boolean = False
I know that sharing code is usually helpful in situations like these, but I wouldn't know where to begin concidering where the execption is being thrown. If anyone knows if there is an issue with vb.net 2010 or a 'quirk' that rquires me the do something slightly different, please let me know. Out side of that I am completely lost
