I'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.
Show me a link to the source of a good scientific calculator example?
I'm using VB express 2008. I've been searching, but I can't find any good ones that work with express 2008!
How to code the sqrt, log, sin,cos and tangent buttons please write down the code for the mentioned buttons
View 1 RepliesIntroduction: Probably a year or more ago I asked if was possible to use the Mathematical functions in Windows Calculator or use any DLL file it may use without a satisfactory answer. As I require the greater accuracy of Windows Calculator in String format. Would it be easy to keep switching between a Vb.Net Form windows based application and Windows Calculator and, using SendKeys, get results back to a Vb.Net application using Copy & Paste via the clipboard but to do this in an automatic fashion at all please?
What I am particularly interested in is getting Log10 or LogN results and also doing ARC or INVerse LOG10 or INVerse LogN calculations. But I require the greater accuracy of windows Calculator. Additionally, would it be possible to assign a keyboard keymap to each key in Windows Calculator so that, for example, the L key would be assigned to clicking the LOG10 button, ALT for the Hyp checkbox, SHIFT for the INV checkbox and so on?So imagine sending key sequences to Windows Calculator to completely automate it. And Windows Calculator has been updated too in WINDOWS 7, would that make it any easier to work with?
I have probleam with my code, currently i am create scientific calculator which have function sin, cos & tan. The code i create it not working because every time i convert the function it will show 0 as answer. how to correct my code here.
Public Class Form1
Dim total1, total2 As Double
Dim [Operator] As String
Const conversionFactor As Double = Math.PI / 180
Dim result As Double
total2 = Val(answer.Text)
[CODE]...
I am building a scientific calculator.
1. After I clicked the Sine button, I get the result in a textbox.. When the result is there, for example: 1 radians Sine = 0.8414.... I can still put numbers at the end of this result.. like button 5 will be 0.84145, so how can I disable that?
2. After I get the result from a calculation, the textbox should be cleared when I insert a new number.
I want to build a calculator, i want to learn vb.net myself so i contacted you.
View 2 Replieshow 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 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 would like to know if Visual Studio does have a setting where you can choose whether it should write nombers like 0.00000127 in scientific notation or not? I am writing such doubles to file but VB2008 writes them in scientific notation. If I treat these numbers as decimals then it writes them correctly, but I also have to take care of performance as I'm writing lots of numbers.
View 1 RepliesThe only post I can find on this matter is one that coverts the double to a decimal before converting it into a string. However the numbers I'm using are far larger than what a decimal can store.
Example: 1/(16^10)
So how can I convert the solution to the problem above. Which equals 0.00000000000090949470177292824, to a string value that is exactly as it's shown?
Cause when I convert this to a decimal I still end up with a string in scientific notation..
I can not column 4 of my Datagridview1 to display numbers as ###,###,### with not decimal places it seems stuck in Scientific notation mode, even though I have set it several different ways in the menus.How do I set it in the program like I set the column width.
DataGridView1.Columns(2).Width = 80This is in VB ExpressGary
I've written a small program that does some calculations and I want to display some of the results in scientific notation. For example, I want to display 0.005 as 5.0E-3.
View 2 RepliesI have this sql server query that I am running in my .net app.[code]...
Any date that has e in the middle such as 20120731*e*0000001 turns into scientific data.
I have data formatted as an ASCII text file with easting, northing, and depth fields. I've attempted an arrayList with some success, but there has to be a better and more efficient approach.
[Code]...
I was using the following code:
If Entry.ToLower = "test" Then
Dim test As Double
test = Double.Parse(InputBox("test", "test")[code]....
to check if I can inputoutput scientific numbers tofrom Double.I was able to output the data successfully. (With "E" instead of "* 10 ^" but that's fine)But when I input the same number error occurs.
"System.FormatException: Input string was not in a correct format.
at System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt)
at System.Double.Parse(String s)
at Particle_Simulation.General.ConsoleEntry(String Entry) in G:ProjectsVisual BasicParticle SimulationGeneral.vb:line 23"
I have a "legacy" VB.NET application (winforms) written for .NET 1.1, and re-compiled under 2.0 that produces a report in HTML via a custom XmlTextWriter wrapper that is suited for HTML. The user then would print the report into pdf if they wanted to.
That was 2003, and now technology has changed a bit, especially within the C#/VB.NET world, and customers want to skip the HTML part, and go to PDF directly. What are my options for open source, or low cost PDF libraries that work well with .NET and must support tables with pictures (generated bitmaps from code) and text.
[Code]...
6/0
6/1E-10
6/2E-10
[Code].....
I need those in there true form not scientific notation, how do i do this in vb.net?
I am working on a project that involes reading an Excel file, picking through it, then creating a flat CSV file. One of the the data elements I am picking up is a 9 character string that may be numeric, or contain one or more alpha chatacters. Excel has a nasty habit of converting long numerics to scientific notaion. I can overcome this by converting the "general" string to "TEXT".
However, there is one instance where I can not get the function to work...the string is "90333E108" ( the CUSIP for USU). Regardless, the text string is saved properly into the CSV file. When opened in a text editor, it reads correctly.
When opened with Excel, it is in scientific notation. Changing the field to "text" from "scientific" still displays "9.03E+112".
how to create an csv file that Excel will open and read correctly?
You can test this by creating an Excel workbook, format all cells as TEXT and add the following data:
90333E108
123
2
[Code]....
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.
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 RepliesSo when i build or click debug on my program. No errors come up and its smooth. So i decide to publish my programme. However. I come up with a bunch of errors during the publishing.
Here they are:Error 1 Cannot publish because a project failed to build. 1 1 Simple CALC
Error 2 Unable to copy file "binReleaseSimple CALC.exe.manifest" to "binReleaseapp.publishApplication FilesSimple CALC_1_0_0_0Simple CALC.exe.manifest". The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.
I have this:
If (TextBox1.TextLength > 16) Then Return
But I want to add a beep to how can I do it? I mean I can only Return and I want to use Beep() too.
I've made a simple calculator, everything works except for the adding (+) function. Such as 3 + 4 = 34 (which it doesn't). It takes it as a string, rather than a number.
Here's what I have so far:
CODE:
Again, the problem is the adding is not functioning.