I know how to read input numbers, but when I input equation like A+B, I can't use the equation to add two numbers. I tried many times but failed to use the equation.
Here my
Public Class Form1
Dim Number1 As Double
Dim Number2 As Double
[CODE]....
I wanted to have a textbox that can be input in terms of numbers. Then I need to use the number user input into a certain equation. How I can do this??
Also if I want a user to input equation such as A+B into the box, but then I need to use the equation user input to find answer for certain A and B value. Can this be done?
I am trying to make a loop to calculate the total costs for 12 days of costs. It has to compound sort of though. I need the total = cost for day 1(includes day 1) + cost for day 2(includes day 1 and 2) + cost for day 3(includes day 1, 2, and 3).....up to day 12. I have a for/next loop in my array, but it calculates the total for 12 days, but I need it to add as explained above. I have been strategizing and the program needs V= day 1 then add V to T. Then V needs to clear and then loop again so V=day 1 + day 2 then add V to T. Then V needs to clear and loop again so V=day 1 + day 2 + day 3 then add V to T and clear V.........up until all days are added together. If anyone has any suggestions or any idea of what I am talking about please comment! Here is the link to another forum that might explain the program in more detail:
Here is the code for my program so far:
Public Class form1
Inherits System.Windows.Forms.Form
Private Sub cmdCalc_Click(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles
[CODE]..........
This is my code for solving the quadratic equation..you input an a,b and c value and it finds the roots but i dont know how to graph it.
I am trying to develop a simple math calculator that will allow the user to input the right-hand-side (RHS) of an equation into a textbox on the application and have the application evaluate the expression for a given value of x, which is also input
into the application by the user via another textbox.For example, if the user wants to evaluate the following expression,
y = 3 + 4*x + 5*x^2
then they would input into the textbox the RHS of the equation
3 + 4*x + 5*x^2
and then enter a value of x into the another textbox and click on the calculate button.I tried this:
answer = EquationTextBox.Text
but it doesn't work.
I know how to read user input using textbox but it only can read character and numbers. Is it possible that I want to read user input equation?
Example:
User type A+B
User put range of A and B.
1.25<A< 3.56
2.45<B< 9.87
I failed to read the equation using textbox. Is it there are other ways that can use to read equation input A+B?I am using VS2005 and VB.Net. I really new in this programming using VB.Net.
I have a program that allows a user to input numbers from an inputbox and it displays the Total numbers entered, the sum of the numbers entered, and the average of the numbers entered. What I can not seem to find it how to have it display the largest number entered. The code I have so far is,
[Code]...
i got the following equations and want to apply it in VB.net, how do I construct it in VB.net.
[code..]
i have one more issues, and hope is the last for now. How can I limit a textboxe's input to only numerical with certain range of values (eg -10 to 10) and with that happening while I type in the values?
View 9 RepliesI want to extract numbers from a sequence. Example: if the number is 1890928 i want to extract "1" or "89" or "909". I think it's something with left or center but i don't know how.
View 2 RepliesI included all the code this time. In calculate click event the value is zero and I don.t understand where I went wrong. My work is due tomorrow, if anyone can tell me why I can not extract the price from the string. What this program is doing is taking items from the stockListBox and adding them to the shoppingList Box then extracting the price from the shoppingListBox and adding the prices together.
0
Public Class SupplyCalculator
Dim lists As String = "staple" & "stapler" & "folder" & "notebook" & "pencil" & "eraser" & "pen" & _
[Code].....
Consider the text: "The precipitation will be 2-3 cm".I need to extract the integers 2 and 3 and seperate them in order to compute their average (i.e. (2+3)/2 = 1.5).Can someone help me with a regular expression which would extract the integers 2 and 3 and seperate them. I also need to know if there is any other way to do it other than regular expression.
View 11 RepliesI am trying to extract the left to numbers from a textbox this is hat I have but it does not work:
Dim lblLmins As String
Dim txtHrsMins As String
lblLmins = (Left(txtHrsMins, 2))
In VB6 it's very easy lblmins = left(txtHrMins,2))
Forgive me but i have a noob question, I cant seem to get my head around.I have a textbox.text string as "111.1, 22.2, 3333.3, 444.44" What I want to is extract the numbers which may be random lengths, but all separated by a comma to
dim i1st number as Integer
dim i2nd number as Integer
dim i3rd number as Integer
dim i4th number as Integer
I know how to search for one instance of a string in a string but taking the 1st part to the comma, then the next comma and so on is confusing me.
[Code]...
I have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")
Else
[CODE]...
I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.
Is this software what i need to install to extract data from PDF documents using 2005? If so is this the link i need to get it from? [url] I just got no idea about itextsharp
View 5 Repliesso here is my scenario. I have two input files... both are plain text files. File1 has customer name, customer address and invoice number. File2 has customer name, customer address, invoice number AND a keyline. File1 will only contain some of the records in File2, and it will change daily. I need to be able to compare File1 against File2 and output one file (preferably an Excel spreadsheet) with the info from File1 and the keyline from File2, that matches the duplicated info. I know the basics to get it to work, but I'm not sure what would be the easiest way of doing this... File2 can have up to 100,000 records per day. I'd only need to run it once a day though.
View 6 RepliesFor my database program, I need to open a text file and extract the numbers written there into arrays.
View 2 RepliesI am trying to separate numbers from a string which includes %,/,etc for eg (%2459348?:, or :2434545/%). How can I separate it, in VB.net
View 4 RepliesWhat was the command for a input box?
To get this app right if I enter 5, the sum should be 15.
I can get the numbers to convert the input works right dispalys in listbox just wont loop been at it for two weeks It only ask for store 1 values it displays it but it doesn't prompt for the rest of the stores values it should be 5 i tries for 1 to 5 at the top of the statement but that didn't work either.
private Sub btnDisplay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplay.Click
Dim strvalue As String
Dim intcount, intsales As Integer
[Code] .....
For Next Iteration To Sum Users Input Numbers
View 2 RepliesI have 10 buttons 0-9 And i have 4 textboxes All representing different values (n,e,x,y) Ok so what i want is to be able to use my 0-9 buttons to input the numbers into the boxes. However my problem is How can my program know which text box the mouse cursor is in. Right now, i can only get it to go in one of the boxes That i tell it too by using the textbox's name. Or all of them at once.
SO is there a way that when i click in text box "n" when i click numbers they will go there. Then if i click in text box "e" and click the the numbers, they will go in there?
I'm trying to catch up on my school work and for my evaluation I need to make an application where you input 2 numbers. We will call them x and y.
View 7 Repliesi want to restrict input of a textbox to only numbers but am doing it on asp.net, so i cant check for each character that is being inputed cause it will cost me a post back and thus lots of time?
View 1 RepliesI want to create a textbox user control which accept only numbers.
View 8 RepliesI have been trying to have a user input 10 Inclusive numbers between 100 and 199, but it doesn�t seem to be working, can someone point out where or what am I doing wrong?
[Code]...
I have an assignment that is supposed to accept user input of random numbers. The only part I'm struggling with is I'm supposed to make copies of the array after the user is done inputting the numbers. These copies has to be sized exactly to how many numbers the user input. Am I supposed to use a counting variable and if so how?
View 5 Repliesthis up but this line below seem to be the problem this sentence (Textbox1.Checked) its supposed to add all the numbers up and give total in a input box under the score line is the complete code sorry for wrecking anyones head cause mine is demented
from mark
Protected Sub TextBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles yourtotal.TextChanged
[code]....
using for...next loop the program is supposed to accept 2 user inputed integers and display all even numbers between the two in one label and all odd numbers between in another label.
Private Sub displayButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles displayButton.Click
' displays the odd and even numbers between two integers
Dim intNum1 As Integer
[code]....
I'm not exactly sure what this code is doing. When I put 1 in the first number and 10 in the second number, the odd label only shows 9 and the even label only shows 10. Another example is when I put 2 and 15, the odd label comes out as 15 and the even label is 14. I'm very new to VB and programming in general and have just started getting into for...next loops and don't fully understand what the counter is or how the loop is supposed to work. I guess I'm having 2 problems. One is that I don't know how to make the program find the right numbers(my logic is off? or how I set up the loop isn't right?) and the other is the labels are showing only 1 number each instead of all the numbers in between on their own line.
