i have an issue with my program. when i create a function and use a calculation in it it returns a wrong answer. if i copy the calculation and put it directly in the btnClick event it works ok. is this normal?
here is the code if you would like to try see what i am doing wrong.
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
[code].....
To have a function that takes the average (which is calculated by a different function) say for example the average is 6, now the function is to take the number 6 and get the variance from six to another number lets say its 12 so this will return a calculation of 50% variance. now here comes the issue, i have it calculating the variance how ever lets say that there is a score that is 0, how can i make it calculate the variance without taking count for that 0? i guess you can say i need it to "skip" if its a 0.
View 5 RepliesWhen I switch my selection from one radiobutton to the other radiobutton I get a "NullReferenceExeptionwasunhandled"next to the channel= expresion. Other wise calculation and funtion work well.[code]
View 1 RepliesI am using the following code to get distance between two propertys. The problem i am having is each Distance Calculation is being obliterated and I am only geting back the last Calculation instead of each calculation/distance
[Code]...
I need to store a calculation to use later and obtain a new calculation
[Code]...
I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?
I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)
What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.
I have just started using VB, and from what I have found so far it seems like the tools you have is
- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function
As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.
I'm trying to undersatnd the syntax of calling a funciton and it seem confusing when I'm using a web service in ASP.net. Maybe this question should be in an ASP forum, but it is a VB question. This simple web service allows you to type in your name and it response with an alert box with you name.
My question is, How can you call a function with 2 arguments when the function is only defined for one. I understand that the second argument is actually a method that handling the respons, but how can you interchange function arguments for methods and how do you know that there are methods for
Here's my call:
<script type="text/javascript">
function HelloWorld()
{
var yourName = $get('txtYourName').value;
[CODE]...
Heres my code in vb 2008[code]...
I need to add 15% vat to it and i have no clue how to add the 15% vat.
compute an exact age of a person using the format date of mm/dd/yy... in vb.net, i was trying to code it but the result was not the exact age of the person.lp me...
View 11 RepliesI am using Microsoft Visual Studio 2008 with VB.NET, and in class we were assigned this project: A procedure should calculate a 2% price increase on all red shirts, but a 1% price increase on all other items. In addition to calculating the price increase, the procedure also should calculate the new price. You can use the variables strItemColr, strItem, decOrigPrice, decIncrease, and decNewPrice. Format the original price, price increase, and new price in the lblOriginal, lblIncrease, and lblNewPrice controls, respectively.
View 1 RepliesI have datagridview, wich have 5 columns
example:
id supplier bought payed sum
1 a 15
2
2 a 20
[Code].....
I'm having trouble with a calculation in VB and it's a simple one but for some reason I keep getting an output of zero.
Here's the code for the calculation and the click button:
CODE:
i have this problem on how to calculate the amount due in our system in VISUAL BASIC.NET .in returning module, (this is for penalty purposes), if the borrower didn't return the book on time, the system must automatically generate the amount due .one daY is equivalent to 10(ten) pesos.so if the borrower didn't return the book with 2 days. the amount due must be 20.00 pesos.
View 6 RepliesI have two money fields in a SQL database called TotalClaimed and PartialSettlementAmountRecd.They are declared as Decimals like so:
Public PartialSettlementAmountRecd As Decimal
Public TotalClaimed As Decimal
They both output the repsective amounts perfectly. I need to do a calculation on them, by subtracting PartialSettlementAmountRecd from TotalClaimed. I have tried the following, but it just outputs a random number, not the amount I require.
Dim NewSettAmount As Decimal = (ClaimDetail.TotalClaimed) - (ClaimDetail.PartialSettlementAmountRecd)
Response.Write("New Settlement Amount: £" & NewSettAmount)
I found this thread in regards to calculating CRC16 on an array.... however, it does not work probably because it was written for VB6 and not .NET. [URL] Does anyone know of a built-in function in .NET to calculate CRC16? If not, is there a way I can adapt the above VB code example to work with Visual Studio 2010?
View 12 Replieswhat i am trying to do is i have two textboxs which have figues in them and need the 3rd textbox to display the figure the code i am using doesnt seem to be doing anything could anyone spot it and tell me why it is not working for me
[Code]...
i am trying to do is i have two textboxs which have figues in them and need the 3rd textbox to display the figure the code.[code]I want the answer doesnt display in the textbox as i want it but when i click on the text box nd type anything the answer shows but in the error
View 6 RepliesDevelop an application which reads two integers n1 and n2 from the user via two textboxes and displays in a label the sum of the factorial of the integers n1 and n2?
View 3 RepliesI'm writing a financial calculator. I know that my calculations are more precise when Decimal format is used. But when I calculate 314/365, the answer given by VB is 0.8602814581, where as the real answer is 0.8602739726. This ends up affecting my calculations quite a bit.
View 7 RepliesI am trying to perform a simple multiplication in vb.
Below is my code:
Dim minus As Integer
Dim minusPrice As Integer
Dim totalPrice As Integer
[Code].....
I have an array of characters. Depending on the number selected (between 1 and 30), the program selects random characters and concatonates them into a string. Kind of like how I think a password generator would work.I want to update a progress bar to show how the operation is going, but I need to reserve 20% of the progress bar for some actions before this, and the last 10% for the actions that follow it. So there is 70% available to use. My question is:If I set the progress bar to 20% and do the following math: 70/NumOfChars, then use a for loop to add the result of this to the progress bar (pb+=result), why does the total progress NOT EQUAL 90%!
View 1 RepliesI am trying to figure out how to take what the user selects in the up down menu and use it in my calculation.
View 2 RepliesI made a calculator but I want to use only one time a comma (,) and after I put for example a minus(-) sign, it will enable the comma again.
View 6 RepliesI'm trying to work on code where I enter number of hours into a textbox (txtHours) and then EITHER you press a button (cmdPay) and then the income for the week is calculated and shows up in a second text box (txtPay) OR txtPay does the calculation itself, everytime a number is typed into txtHours.
Currently, my code is trying to do the former, because I have NO idea how to even approach the second option.My problem I am having with my code, is I don't know how to properly dim my parameters, since my "button_click" code keeps coming up with this error:Argument not specified for parameter...
Public Function PayTotal(ByVal cnthours As Double, ByVal standpay As Double, ByVal overpay As Double) As Double
cnthours = CDbl(txtHours.Text)
[code]....
got a project from college to create a quotation system in console application for a car company. The program has to tell the customer how much interest they'll be charged and the loan they take out.I've created a file that Adds,deletes,edits customer. Also views all customers. The problem I have is that after I've added the customer. I need to now implement the calculations into my program to then give them the quote. Also need to add a password to the program.
View 6 RepliesI have a 2d array and I want to do a calculation on each element in the array and then return the index which results in the smallest value.
I have tried iterating through each element in the 2d array and running the calculation. If the calculated result is smaller than the currently stored minimum I set that to the minimum.
This works but it runs so slowly it makes the solution a non starter. It performs each calculation quickly but because of the number of elements in the array the calculation for the whole array is stupidly long.
I am trying to work with taking in and parsing CSV files. Right now I have it taking in and producing something like this:
The program loads the csv and copies the data into an array as such:
ReDim strarray(num_rows, num_cols)
For x = 0 To num_rows
strline = strlines(x).Split(",")
[Code]....
etc. I guess my main problem is trying to perform calculations to all values in a specific column. To start I am just trying to figure out how to isolate the columns and found that by using MsgBox(strarray(x, num_cols)) it will msgbox everything in the second column twice. I just want to try and understand how I can perform a basic calculation like multiply every value in the first column by 2 and every value in the second column one by 3.
I have a Grid With Text Item Templates to insert data from Grid to Database.I have to make some formula on runtime with out postback the page Can i do this My code is bellow.
For Each gvRow2 As GridViewRow In GridView1.Rows
Dim txtNetWt As TextBox = CType(gvRow2.FindControl("txtNetWt"), TextBox)
Dim txtGrossWt As TextBox = CType(gvRow2.FindControl("txtGrossWt"), TextBox)
[Code]....
Im creating a slot machine that costs 10 credits to use but i cant get it so that i can -10 credits from the total.
Heres my entire code:
Public Class frmFruitMachine
Dim OneCredit As Integer = 1
Dim FiveCredit As Integer = 5
[CODE].........................................
In my form I have a text box for user to enter the number of column and row. And I also have a text box to enter the first X value and Y value. Now what I want to do is if user enter 2 for row and 10 for column then now I will have two rows with 10 column. The X value is for column and Y value is for row.
It will look like this
**********
**********
When the user enter the first X and Y value. For next X and Y value i must plus the original value with 2.54.
So my X1=TextBox1.Text
Y1=TextBox2.text
this values are input by user.
So
X2=TextBox1.text + 2.54
X3=X2 + 2.54.
and so onn. Same apply for Y
Let say user input are X=100 and Y=100
The value for first * is X= 100 and Y=100
Second *X=102.54 and Y= 100............. and so on
For 11th * X=10th *value + 2.54 Y= 100+2.54 and so on
The row and column is not same always it depends on user..