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'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'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.
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?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = ""
End Sub
This is to Clear all numbers but I don't know how to Clear just one number. for example i want to do 23 once a user clicks CE, i want to make it show 2
Ive made a calculator that estimates how high a model rocket will go. I was intending on making a simulation that will show you visually how high it will go. (Little rocket image goes up and stops at estimated hight) I know how to make a picture box move and everything, but i can only make it move to a set distance.
View 3 RepliesI have a small installment calculator assignment, I have only used VB6 before but i am required to use .NET (using Visual Basic 2008 Express).
There are four fields:
1. Loan Amount (10,000.00 - 250,000.00)
2. Loan Term (5 -25 years)
3. Loan Interest Rate ( Input to 2 decimial places)
4. Payment Frequency (12, 4, 2, 1)
I need to calculate an Effective Rate as:
CODE;
Then calculate an Installment Amount:
CODE:
Where:
CODE:
And finally display installment amount on the form.
This is the code I have so far, but I am getting a NaN result!
CODE:
add a code to handle the TextChanged event of my Textboxes to clear the Result box.
Private Sub btnCalculate_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
txtResult.Text = txtRate.Text / 100 * txtAmount.Text * txtYears.Text
End Sub
[code]....
I hav copied my whole cde in form 1 to give a better insight of my question.what I want is to search for a string example title of a song then display my result to a richtextbox but the result should include the title the location and number.[code]
View 2 RepliesI created a small databse program, when I created the search field I wanted to display the results in "listbox" which I found some code that work perfectly
For each row in ds.tables("Tablename").rows
me.listbox1.items.add(row(1).tostring())
Next
but I also need to display "row 2" ACCORDING to the selected item from listbox in a textbox.
since the listbox is displaying the result of a search, it's been hard to find, how to do this?
I am currently writing a code that prompts a user if they want to convert F to C or C to F, two functions with the calculations. My problem is my loop, it exits one time through and doesn't prompt again. And also doesn't display the final result.
' VB Script Document
option explicit
const menuBar = "Temperature Conversion"
Dim userPrompt, prompt, Temperature, toCelcius, toFahrenheit
prompt = vbOk
Do While prompt <> ""
[Code] .....
way to clear textboxes in VB.Net and what is the difference between the two methods? I have also seen people be critical of folk using clear objects on their forms and i can see why but in this case, i am only learning.
txtbox1.Clear()
or
txtbox1.Text = ""
Im writing a program and its pulling data from a .MDB to put in a .DAT file.
Here is my while loop:
vb
database_connection()
sql = "SELECT * FROM tlalist"
[Code].....
In my database there are currently 6 rows. and only 1 row has the TLA_DAY column equal to 1, but for some reason when I look at the .DAT file it creates it outputs the result twice rather than only once.
Once JTLA_count increments it becomes "2", but the while loop still outputs as if its still equal to "1". Ive used breakpoints and the counter is incrementing fine.
After click the ok button all controls of displaying data should be clear in dataentry form. If i enter some data in the Combobox or Textbox for saving the data into the database, If i click the OK button all controls of displaying data should be clear, B`se i want to enter next record, so how can i do this?? Is there any Refresh Property is there?
View 8 RepliesI need a inline calculator for a textbox.
When the user types 45*10+5 i need to have the answer displayed as 455 in the same textbox
Any one with a briljant idea of how to sovle this.
I 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 trying to make a calculator with one textbox and 16 buttons. Buttons are:(0,1,2,3,4,5,6,7,8,9,+,-,*,/,=,C). So here is code for now:
vb.net Private Sub nula_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles nula.Click
TextBox1.Text = TextBox1.Text & 0
End Sub
Private Sub jedan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles jedan.Click
TextBox1.Text = TextBox1.Text & 1
[Code]...
When I add those numbers and operators its easy, but how make operations really work now?
so i am new to v basic and as you can see in the picture below that i have 2 textboxes just to put in them 2 numbers and then do mathematical calcualtions on them and a label up there that shows the answer so i wanted to make 1 textbox to type in the 1 st number then press the symbol for example + and then type the 2nd number and then press equal so the result is formed in the same textbox the only problem is idk how i searched google but i couldnt understand here is my source code
[Code]...
i know its probably the first thing you were taught but how do i clear a textbox of text. and i know it too
[Code]...
I am writing a LAn Chat and it works so far but when I send the data it still remains in the textout box. I want to clear that box when the button is clicked and I am not sure if i am doing this right.[code]...
View 2 RepliesI have a textbox with text (to tell the user what to put in the box) when they click inside the box, i need either all the text to disappear or it all to be selected so that it is easier for the user to enter the data but pref the first.
it is a textbox to collect the date (in relation to my other post) when the program runs, the DD will be displayed in a textbox, i need it to go when the user clicks to enter the day or to be highlighted/selected (NOT THE TEXTBOX, just the TEXT INSIDE)
How to clear textbox if the value equal zero i have several textbox's with currency look at the picture i am posting you will see the price of 2.99 then under neath for other box'shas this $0.00
View 9 RepliesHow I can clear last char in textbox in c# when I press key like D0 (mean when I press D0 clear 0 in my textbox)? Or don't let me enter 0? You know I don't want user cant enter number in textbox .
View 4 RepliesI am having throuble resetting my textboxes to nothing if the selection in the listview is nothing. I.e. when i select a record my textboxes are updated with teh selected data, but if nothing is selected after something is selected I would like to clear the textboxes to blank again.[code]
View 1 RepliesI have a single text box that has text in it. When I put the mouse in it and click it, I need the text to clear so new text can go in.
View 3 Replies