I am working on an assignment for Visual Basic, trying to write a program that will enable a user to enter a number and have it display that number and show in a listbox how it would multiply with numbers 1 through 12. An example of this is:
5 X 1 = 5
5 X 2 = 10
...
[code]......
Due to the way I currently have it setup, the calculations are not being excecuted properly. I've been tweaking for a while and haven't gotten it yet. I think the problem is that certain equations are being done before certain terms are defined. If I click the calculate button multiple times, it works fine, but I need it to function on the first click.
Take a look:
Public Class frmford
Dim Make, Model, InitialPrice, Options, AirConditioningTax, GST, PST, Total, Subtotal, APR, Months, RoofRack, SunRoof, SideAirBags, TintedGlass, RearSpoiler, GPS, PowerLocks, FreightAndPDI, AirConditioning As Single
[CODE]...
I've got Button and Listbox.. Now i want to know how can i code the button to show picture exactly for selected item from the listbox.. i tried:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
PictureBox1.Show = ListBox1.SelectedItem
End Sub
And it doesn't works.. i want.. picturebox to show special picture for each selected item from the list box...
How do you refresh a datagridview in code to show to show new data in the DB?
View 3 RepliesI have a site map configured as such:
[Code]....
For some reason, even though in the sitemap, the url is defined as "[URL]" or "home.aspx", the currentNode.URL always has the domain attached to the URL, creating bad urls like "[URL]" I've tried to figure out where [URL] was coming from by search my project and inside of my web.config file, but I can't seem to find it.
I am developingreports in thePrintDocument andI emergedasadoubtin the image belowinformation from the PorcentafemProprietário( Percentage /Ownerdoes) notappearCod'sonly33what Iwould like to happen
the limitof this informationwould be 100%.Anyone knowany waytodetract
fromthe informationthat the reportcorrectlyPercentageDisplay/Ownerin
accordancewith its Cod?[code].....
I need to put a combobox on a form that displays a list of customers.Each customer has a customer number and customer name.I figured out that VB.NET doesn't have multi-column combo boxes so to get around that I was going to query the data and put a tab between the customer number and name for the display members and have the value member be the customer number:
SELECT CustomerNumber AS ValueMember,
CustomerNumber + CHAR(9) + CustomerName AS DisplayMember
FROM Customers
ORDER BY CustomerNumber
This only works partially in that in the selected area of the combobox, the tab between the number and name shows but when you drop-down the combobox, the tab is not preserved.
Why there is no multi-column combobox native to VB.NET annoys me but that's whole other topic.Does anyone have any ideas for a solution to this problem that doesn't involve getting a third-party control?
I am trying to make a program to calculate the roots of a polynomial equation using the bisection method. I have designed the program so the user input a range of x values (x1 and x2) to solve for the root. When I debug the program I keep getting zero for the root. I know there must be something wrong the way I have my loop setup that keeps giving me a zero root. Here is what I have so far
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x1 As Double
Dim x2 As Double
[code]....
I'm working on a calculator. So far I've made it so you can type in an equation with as many numbers as you want like 5+6-12*3/4 and it can solve it. My main problem now though is that it's solving the problem left to right instead of using PEMDAS. For example 2+6*2 should = 14 but when I type it in it will give me 16. My calculator isn't using parenthesis or exponents so I just want to put the multiplication, division, addition and subtraction in order when solving.Could a more experienced coder give me some pseudocode to make this possible please? So far for the calc I've been using regex a lot. Is there a way to achieve this without regex?
View 9 RepliesMy vb2008 project is connected ["PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = C:MyProductMyInvest.mdb"]to an access database. The numerous searches and filters are sql select coded. The database has been added using the Data Source Configuration Wizard. My problem is when published and loaded on another machine it fails due to being unable to locate the database. I have tried the configuration alternative of making a copy and not.
View 11 RepliesI've been messing around with my Sql Server all day and i still cant get a remote computer to connect to it. I've looked at various resources but really, i don't know where to properly look.
I've configured my Sql Server Express 2005 from the Sql Server Configuration Manger:
- Started Server Browser
- Enabled TCP/IP
- Changed my Sql Server Properties to Network Service
Then for my connection string in Visual Studio using VB.NET is:
ConnectionString = "Integrated Security=SSPI;" + "Initial Catalog=mydb;" + "Data Source=VAIOSQLEXPRESS;"
I am unsure about my connection string especially my Data Source. May someone tell me how to find my Data source? Or if there is anything I'm missing?
I have to calculate values of several equations in an application. For example, one these equations could be:
d = a + b*z + c*z (this is what is being displayed to the user, assume that 'a', 'b' and 'c' are provided as textboxes, assume that z is a hardcoded value for now)
Now, the user could enter a=1.5, b= -0.5 and c = -0.6 (or even 'a' could be negative). So, I just tried a sample code for simple values but to no avail...
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
Dim val1, val2, val3_calculated, first, second As String
first = "8"
second = "3"
Dim arr(10) As String
[Code] .....
Error:
But it throws an error saying that I am not using any databind control.
Concerns:
First of all, is it necessary to use this "eval" operator in here? Is there any way to keep "-0.5" with the sign in asp.net using vb?
I have a multiple form application with a listbox on each form. I want to be able to select an item in one listbox on one form and then click a button and it show up in a listbox on another form.
View 3 RepliesI been working on a Printer INK Management Program for my Company. We have many different districts we deal with. Each district has a different Server.I am trying to create the application where they can place the database file anywhere they would like on the server and when they first run the application it would ask them to choose the location of where they placed the file.I would like to know how i would be able to edit the connection string information in the app.config file during run time.
View 1 RepliesI've been working on a tcp online chat. I heard that you need to configure your router to allow other pc to connect or something?
Server :
Imports System.Net, System.Net.Sockets
Public Class frmServer
Dim serverSocket As Socket
Dim clientSocket As Socket
[Code] .....
Is there a way to create new mathematical equations at runtime? Obviously you can pass new variables to a given equation, but I need to make a new equation altogether (then give it variables).
[Code]...
Similar to using VAL(a$) to return the numerical value of a string, is there a function for returning the solution of an equation that is user-typed into a textbox? For instance, user types F$=(a+b*x)/(c*x^2-d*x^3) where the variables of the equation are either pulled from a textbox or derived within the code. I am looking for something like F=Solve(F$).
View 5 RepliesI have a listbox and i populate it with data in my code like this on the page load....
[code]...
So say one item in the list is displayed Ted Jones (123) and its valuefield should be 123. Im just not understanding what i am doing wrong here.
I found a great way to get the equations of calculations from application to Microsoft word file with MimeTex here-[URL]
But unfortunelly the code is only for Microsoft Visual Studio Solution under the Eq2ImgWinForms folder, but I use on my application Visual Basic language (Visual Basic 2008 Express Edition).
how could I use the same thing on my application with Visual Basic?
I need a VB.NET program to solve linear system with any number of equations
View 5 RepliesI'm having issues on where to begin on the next step in my Visual Studio 2010 project.
Here's my original code:
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Windows.Forms.Keys.VolumeUp Then Shell("C:USBRelayUSBRelay.exe -c:3 -r:1#1")
[Code]....
I've made a fairly good Windows form application to solve quadratic equations, but I am having a hard time understanding the publication process microsoft uses in Visual Studio. I'd like to distribute my programm as freeware on my blog.
View 5 RepliesI am writing to a listbox with a For/Next stepped to .01.The problem is when it go to 1.1 there is no 0 after the .1. I tried Format(i, "00.00") and the 0 will not fill in.
View 2 RepliesI am doing this assignment on a Math tutor program and I am stuck at one point.First off the listbox needs to show the equations for the number entered between 0 and 12 example:
1+1=2
1+2=3
1+3=4
1+4=51+5=6[code].....
I don't understand how to get that information into a list box.I am also stuck in an infinite loop somehow i think because nothing shows up at all in the listbox and the number the user enters should at least be there. I am assuming the code should be more like
lstbox.items.add(decNumEntered("+1 =")
Option Strict On
Option Explicit On[code]............
I have a listbox and there will be names in it.I want to display gender type icons in each line near peoples names. How can i do that in vb.net 2008 ?
View 9 RepliesIm Writing a Program, and wondering how do i go about getting Text from a Comobox1 to show up in Listbox1? i also have lblCount.Text with 2 button increasing and decreasing quantities in lblCount.Text how do i get that showing on Listbox1 as well along side the Text of Comobox1
View 5 Replieshow to hide and show listbox in specified location? on a form in visual basic 2010
View 6 RepliesIs there a way to show all the apps/folders from the task bar in a listbox, and when clicked on selected item to bring or setfocus to?
View 16 RepliesListBox how to show database data?i use below command ListBox1.DataSource = myDataSet.Tables("table1").DefaultViewAFTER RUNNING IT WILL SHOWSystem.Data.DataRowView
View 7 Repliesform1 it have a panel1 with 3 buttons in it.what i want is when you click each item in list then panel1 popup and shows up near that item.[code]
View 2 Replies