how to build a simple calculator in VB; i got the interface with buttons and text box alredy and i figured out how to put more then one number using buttons alredy(Disp.Text = Disp.Text & 1) , Looking at the windows calc, how do you store the number u just entered into a text box and alowe user to enter another to performe calculations, what code should i use for equal button and etc.
View 10 RepliesI want to build a calculator, i want to learn vb.net myself so i contacted you.
View 2 RepliesI'm trying to build a scientific calculator with vb .net, except it is vista glass :-p
I basically want the user to be able to enter an equation like SQRT(5 * 6) / (2 ^ 4) and then I want vb to use system.math to solve it. If I write this in my code, vb is able to do it, so how could I do this at runtime.
I am doing a tutorial for a simple calculator. My question is how can I add code to make a botton that add my tax % to the total amount I have.
Option Explicit On
Public Class Form1
Dim firstnumber As Single
[Code]......
code for calculator using vb.net
View 2 Replieshow to make a simple calculator using vb?
View 11 RepliesI am trying to build a date calculator utility (DateCalc). It returns the number of days,weeks, months etc between two dates.I worked hard and long trying to find out how to convert a date into a format on which you can perform math operations (for the "what's the date in 'n' days time" part) and it works! I can also use the minus operator to find out previous dates, from say 10000 days ago... BUT...I want to develop it further, and this is where I need help (i am still very newbie remember)Can you help me to find a way to code this bit to ignore weekends and saturdays or sundays individually, and a range of dates in its calculation? I have two datetime pickers and a some checkboxes.DTPickFromDTPickToChkBoxExWeekendChkBoxEXSaturdaysChkBoxExSundays An image of my form and it's components is here :--> [URL] Also, as part of my 'Datecalc', I'd like to find the dates of every other saturday and sunday in the future.
View 9 RepliesI want to create a simple calculator using only 1 textbox , 1 button and 1 label, but I don't know how to create the code.
for example if i write : 53+35-33=
and if i press the button it will calculate and the answer the label will show the answer (55).
i am going creating a simple function calculator, but I had to first do a design documentation proposal. I now have to update the project proposal with a storyboard or list of menu and screen items to delineate my proposed user screen and menus.aside from the calculator itself there will not be any menus.I also have to list any user data inputs and outputs my application will require and produce, which i assume i can put any numbers that the user inputs into the calculator and their results.
View 5 RepliesI am new in programming, I am trying to develop a simple calculator but I am unable to connect the addition, subtraction and equal sign buttons.[code]
View 1 RepliesI've got the bulk of a calculator up and working, however it doesn't like multiple operations. For example 3x5+2= brings up 10 (i.e. 3+5+2) and even doing it in two parts doesn't help, if I enter 3x5= I get 15 then +2= gives me 32 (i.e. 3x5=15 15x2=30 30+2=32). Also I am getting trialing zeros in my command line I can't debug.Note that lblcommandline displays the whole function and lbldisplay just displays the current imputted number.
Public Class frmSimpleCalc
'This code is run when the program starts. Here we 'declare' or basically, define which variables we want, what they are and such.
'So, for this example, we need two variables. The number we are CALCULATING and the one which we will CALCULATE FROM.
Dim lCalcNumberMaster As Long 'The master number is the solution, the number stored and displayed when we click equals.
[code]....
I am making a calculator Program to start off on visual basic. I got it to work with MsgBox, but now I'm trying to get it to work with the Print.
MsgBox Example
Public Class Form1
Private Sub Button1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Button1.MouseClick
Dim Pizza As Integer
[Code] .....
Say I type in 6 and 6 I'm getting errors saying Example: Conversion from string "youranswer is 12" to type 'Integer' is not valid. I've tried many things, but it's not working. I want to know what I need to do to get it to print out how I want it. Do I need to do some conversions properly somehow?
Simple Calculator multiplication and division Trying to make a simple calculator. My program inputs numbers and arithmetic operations thru commandbuttons. The numbers, num(n-+1), are odd and the operations, op(n), are even. The code is based on the even op string. Every time a op occurs it is stored in numop(n) to be accessed later. I have all the other operations in sequential order: "*"," "/, "+" and "-". The other similar For-Next loop are the same just interchange the two * for /, +and -. The "+" and "-" work fine in this configuration.
My problem is the multiplication and division does not occur. The numbers and operations line up. The numop(m)=g*h should yield numop(m)=num(1)*num(3). Is there some sort of code to be inserted to accomplish these multiplication and division operations?
[Code]...
I am trying to make a simple resistance calculator for practice. I use text boxes to let the user input the current and voltage, and then a combo box for the units and then a list box to display the results. For some reason no matter which units I select it doesn't convert at all. For example 1/2 will always show up as 0.5 in the list box no matter which units are selected from the combo box. Here is my code.....I know that there is more cases but I only put one to see if it works before I write all of the cases.
Public Class Form1
Dim unitsA As String
Dim unitsV As String
[code]....
I created a simple desktop app (really simple) and did a network clickonce deployment. It works fine on most computers.BUT nothing on one computer (computer A). No message, no start menu, nothing. App has no dependencies other than .NET framework. If I just copy the exe onto the same computers, it works fine on all computers except computer A.Computer A has the correct framework installed. When I double click the exe it does nothing - no message, no error, not showing up in task manager, notta. I tried more than one application and it performs the same.
View 4 RepliesI am trying to build a simple app that will start another program.The command line that works in a dos batch file is c:program filespixellWall Controlwallctl.exe -layout=c:1.lay with my code below this works, c:program filespixellWall Controlwallctl.exe but the switch info above doesnt get passed, I get a run time error.
Public Class Form1
Dim layout1 As String
Dim layout2 As String
[code]....
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.
current version is 2008 I'm trying to build an application with a simple MENU. When the user clicks on a Menu Item i want the container to show some controls, now when the user clicks another Menu Item, the container needs to change and show other controls, and so on with every menu Item the user clicks, one at a time.
I thought of panels showing and hiding for every menu Item clicking, but that would use a lot of memory as ALL the controls would be created, some of them just not showing. I also though of an MDI application, but i dont want multiple forms (with the menu bar) opening inside one form. I just want the actual container of one form to change.
I am currently building a system in SQL Server 2005.
I have a table that holds information about certain insurance schemes such as overheads and other things. These values will change occasionally and currently I administer the database straight through the management Studio.
I would like to build a simple interface that will allow my colleagues to change these values by selecting the company in a dropdown and the current values will populate. They can then edit these values and submit them to the database.
Is this possible in the current Visual Studio supplied with SQL Server 2005 or do I need to get another product.
I wish to build and display a simple diagram that is built from data entered by the user. Because I can't post a picture of the types of diagrams here I'll use the following example. Image a picture of a house as a child might draw it a large square, with a triangle for a roof, a rectangle for a door, and two smaller squares for windows. Now I want to build an application that lets the user enter data and change that drawing according. For example, by entering the length and height of the house the size changes, change the number of windows, size of the door or height of the roof.
Now this may seem like a useless application but keep in mind the house is just an example the real purpose is different but should be as simply drawn. I'm looking for suggestions on make this work. Should I use a paint? or is something like this better done with a tie into the Visio references?
I'm trying to build an application to monitor a site to build statistics from the data being read. This HTML looks like this.
<div id="history">
<h4>HISTORY</h4>
<table border="0" cellspacing="0" cellpadding="0">
[code]...
Now I can read the html and put the text anywhere, I just don't how to read specific parts so I can separate the data out.
I have a Form with a Media Player in it. Which plays a Song.
[Code]...
It's playing in the background since the Form is hidden. When I play itin Debug, everything works fine. When I run the app outside Debug, I get this error: [URL] The Music File is there, but strangely, there comes this weird error.
A particular VB.NET project is actually throwing 'Build Failed' But when I try rebuilding again it says 'Rebuild Succeeded'. It keeps alternating this behavior. Kind of random. Any vbc.exe issue of long locking the PDB or xml files?
View 9 RepliesI have a vb.net 2008 windows form application that I was just assigned to work on. how to maintain and test changes to both the pre build and the post build events? Can you tell me how to test these events? My postbuild event, I believe calls a project file in the solution file that wraps files together in a bundle in debug mode. Can you tell me how the posbuild event works and when it is called?
View 2 RepliesI am using 2008 Express Edition. I am trying to make a Release build instead of a Debug build.Under Tools->Options, Projects and Solutions->General - I checked Show advanced build configurations. The option to switch configurations does not show up in the IDE.
After this, I went to the Project Properties->Compile and switched the Configuration from Active(Debug) to Release.After building, I looked in my project directory, however only in the Debug sub-directory was the .exe and nothing in the Release sub-directory.I have used Visual C++ Express Edition, where I noticed that if you do not change to Release in the IDE than after changing to Release in properties, resets the project to the last configuration setting which is usually Debug.how to make the Debug/Release box available in the IDE, since Tools/Options does not make it show up?
I just created a simple application. I Builded that using build->build myapp. I got .exe of that application. i runned. all went fine. but when i closed that app, even after closing it is in memory. it is still running. how to deploy it properly?
View 12 RepliesI have some very simple questions about making a release build exe in vb.net using MS VB 2010 Express.
I realize that my project's executable is built in the bin/debug folder. However, when I copy this to any other location on my computer or someone else's, this executable does not function. I have read that I need to create a release build but in MS VB 2010 Express, when I use the Project-Properties menu and change the Compile tab configuration to Release and the path to binRelease, I still get the exe in the binDebug folder and not the binRelease folder.
1) Is it normal that exe's from the debug folder do not function outside of the debug folder?
2) Most importantly, if the release build produces a faster exe, could someone please explain step by step how to do this with MS VB 2010 Express ? I do not see any button on the compile tab in the project properties that actually builds the release.
Is there anyone can post a simple code using vb,that start building a simple games ?
View 2 RepliesTrying to make a simple browser with some simple addon's. What Ive done is setup a menu(forum) for the user to enter their email providers web address and it will save it in a xml file. When they click on the email link, it should load the email xml iformation and place that info in the tb_html.text and navigate. I keep getting a null exception and im not sure what going on here. Here is the code:
Browsers:
Private Sub btn_Email_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Email.Click
'Load Action
Dim SavedEmailObj As Storage
[code].....
I was able to build both debug and release versions of my VB code before now I no longer have the option to build a release version. How do I turn it back on
View 3 Replies