VS 2010 - How To Make Calculator Work To Use Only Keyboard
Aug 26, 2011
I'm new in the programming area and I'm having trouble making a calculator. My question is: How do I make the calculator work using only the keyboard, without the need of mouse.
I tried this:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.KeyPreview = True
End Sub
Private Sub FlowLayoutPanel1_KeyDown(ByVal sender As Object, ByVal e
As System.Windows.Forms.KeyEventArgs) Handles RESULTADO.KeyDown
If e.KeyCode = Keys.NumPad0 Then
[Code] .....
It only works on the text box called Result. I want to know how do I make work in the whole Class, and if it is possible, to make it work on two different Classes without writing twice the same code.
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Nov 21, 2009
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
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Jun 5, 2011
How to make this calculator:2 Texboxes In first textbox is writeble (where user will write the version) The second textbox is notwriteble ( there will show the result)In the first textbox to make calculation of version.If user writes for example: 1.03.11 In textbox2 to display the calculation: 22656 If the user writes for example other version:1.05.50 In textbox2 to display the calculation:22895and the same way if user writes 1.03.24 or other numbers auto to calculate the versions, and if user writes a bad text in tetbox2 to display error: For example In textbox1 user writes text: omg In textbox2 shows : Error
Only if user writes number like this: 1.03.11 or other number will calculate it else to shows error
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Apr 30, 2010
I am creating a DIY calculator.The one in W7, I can't hardly see. Mine is much simpler and larger.I currently have buttons for numeric 0 - 9, Add, Subtract, Multiply, Divide, Clear, Enter, and Decimal Point.There is a label at the top with displays results.If I use my mouse to select the buttons, then everything works okay. However, if I use the keyboard, I get strange results.I thought it may have been my old keyboard so I changed it.No difference.If it's not in the hardware, then it's in the code.The section below is what I have for keyboard use:
Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
Ch = e.KeyChar
Select Case Ch[code]....
For each of these, there is a corresponding Button_Click even farther down in the code. Since the mouse click on the buttons on the form works properly, the problem must be above. I can't see it.
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Sep 8, 2011
VS 2010 : make a Rank Calculator?
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Jan 3, 2011
I want to make a game statistics calculator. For this I choose to make a XML database with the base stats of the characters.
I've made a small XML file in the VS2010 project with 1 class stats and made a list to 10 levels (to lazy atm to write all 85).
the XML looks like this:
<BASIC_CHARACTER_STATS>
<Levels>
<level id="1">1</level>
[Code]....
On the Form1.vb I've to combo boxes, 1 to display class names and 1 for levels.
Also have some Labels to display i.e. the base_STR number. But after trying random stuff to get it linked and closed VB to restart again because it was messed up too much
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May 2, 2010
I am trying to create a calculator, which can accept numeric keyboard imput, as well as button clicks, and display the number in a label.
Why does the numeric keyboard input work in this instance
Public Class Form1
Sub Form1_KeyPress(ByVal sender As Object, _
ByVal e As KeyPressEventArgs) Handles Me.KeyPress
[Code].....
Even if I press a keyboard number before pressing the button(so there is no need to clear the label if the button is pressed first etc), the number is not displayed in the label. And even if I completely comment out the code for the button-click, the keypress event still does not display the number in the label. It is as if just having the code for the button completely disables the keypress.
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Jun 18, 2012
i have to finished a cacluator, all my code seems to be working apart from the equals button and i do not understand why..i've tried several different things such as a case too but nothing seems to work to get the equals button working. This is my code, no need for all the buttons they are the same and ive declared variables.
[Code]...
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Jun 11, 2011
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?
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Nov 4, 2009
I am making a calculator at the moment and the plus works and so does the minus well the minus does the FIRST time but not the time after that.you would normaly get 2, but instead it says that the answer is -3.I have attached the calculator so that you can have a look.
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Sep 30, 2009
I have a little Windows Form application that uses sql database.My application works on my computer, but when I install the app to another computer I get this errorSystem.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was noccessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
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Feb 7, 2012
I'm running Visual Studio 2008 v9.0 I'm having difficulty getting the bookmark keyboard shortcuts to work as documented. I did this:[code...]
I must be doing something wrong here. What should I do so that the bookmark shortcuts work as advertised?
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Mar 11, 2012
how to do programs in Visual Basic 2010 (It's a Currency Converter/Import Duty Calculator) and I've come across a few problems which are listed below.Basically the project is like this:I'm trying to create a program which converts Hadean pounds, shillings and pence into British Pounds and Pence before it transfers to a form which calculates Import Duty and VAT, after which it gives the final price.So far, I've created a program which is made up of 2 forms and a Splash Screen. The information listed below is for those who want to know more about what I'm trying to do.Once the Hadean price has been converted to Sterling additional import duties and VAT must be added to the Sterling price. Thus control will pass to a 2<sup style="text-indent:0cm;">nd</sup> form where importation duty is added. Depending on the method of importation the followig duty should be added to the Sterling price:
<o:p></o:p>
<o:p> </o:p>Air Cargo Import Duty: 16.5% of Sterling price
<o:p></o:p>
[code].....
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Aug 25, 2010
Types have their own color (cyan by default).Enter completes the auto-complete suggestion.
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Nov 26, 2009
does anyone know what i need to do? if you do make a youtube video and post it in this post.
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Jun 22, 2010
how to make a zodiac calculator, I know the basic codes that I need to insert, but I'm creating it in a windows application. The day and year are text boxes that the user can input that particular information, but the month is a drop-down box. My two questions are: Is it okay to delete the private sub of the day and year so I can combine them into one sub? And how do I get the months to show up individually in the code area? Or would I have to delete the drop-down box completely and make it like the day and year text boxes where the user can input the information themselves?
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Mar 5, 2011
I mean not like windows xp which the number and signs are not in the same textbox, but like windows 7 which you can see the whole calculation before pressing equal, and i don't think that compute.datatable can do this because it's limited with the basic signs(+,-,/,*) and it doesn't include the other signs(like : sin,^,root,log), so how to make a calculator like windows 7 one?
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May 30, 2010
I have 3 buttons
+ is one button
- is one button
* is one button
I have three text boxes
firstnumber- is 1 box
secondnumber-is 2box
solution is- third box
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Feb 2, 2011
I have an application that requires data be entered, and after entering, a button is clicked to process that data. Clicking the button works just as it should--the data is processed properly. In constructing a test module, I provide a set of data values, followed by:
btnWhatever.PerformClick()
Nothing happens. I have used this syntax for years, and it has always worked flawlessly. I have triple checked everything else and isolated the problem to the failure of the PerformClick(). The PerformClick() is in a test subroutine that does nothing but fill textboxes and labels with default data, then calls the PerformClick() on the button to begin processing. Again, the button works fine, the data is entered as it should be, but the PerformClick() does not fire the click event.
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May 8, 2012
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?
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Sep 23, 2010
I got every other operation button to work besides sqrt, and percentage. I've done the same thing for addition, subtraction, etc. and it doesn't seem to work.
here's my globals
Public Class Form1
Private first As Double
Private second As Double
Private oper As String
[code]....
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Jul 8, 2010
I'm trying to create a custom keyboard for my accounting firm. I have all the buttons and button events sorted out.How can I make it so that when buttons a pressed, the text is input into where the cursor is? Currently i put the cursor for instance in an excel cell, then click the key on the virtual keyboard and nothing is inputted into the cell, i assume because it selects the keyboard window when i click the button. For some keys I'm also simply using:SendKeys.Send("q") for example.
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Jan 15, 2009
How can I simulate a keyboard button click.For example how can I simulate the button 8 and 9 in another program outside my project form?
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Apr 15, 2009
I posted this in the wrong part of the forums. Using visual basic 2008 and keep geting this message whenever I try and test this calculator program I've been mucking around with for the past 2 hours.
[Code]....
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May 29, 2010
I am trying to make a calculator that accepts multiple operations, similar to the calculator found on Windows.
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Nov 21, 2009
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]....
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Apr 7, 2012
So recently my Netbook keyboard stopped working, I got this new one. That would not be a problem if it was not for the missing [FN] key. My computer has several shortcuts, like FN + F6 = Turns screen off.
I cant seem to figure out how to bind these shortcuts to buttons in Visual Basic so I can just hit the button and turn the screen off that way, I've only used VB to make small simple fun stuff.
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Oct 15, 2010
Visual basic 2008.I want to make an on screen keyboard exactly like the one in windows. I have made one which uses app activation, but that only works with the one you write in your codding or using a combobox to select one. How do you make one that works with everything like the one in windows.
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Aug 29, 2011
I wanted to make a calculator. Its fully made and everything but I recently wanted to add more to it. Only thing I can't figure out to do is to make keyboard functions. Like, if I want to type in the numbers instead of clicking the buttons on the calculator to input it into the calc. [code]....
It works to a certain point but i found out that the timer input multiple integers when pressing a key so I thought of about turning off the timer and then having the timer turn back on somehow but that is as close as i can get.
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Apr 23, 2010
I'm trying to make a calculator that adds from two text boxes and displays the answer in another box, but It gives an error when someone enters a character. What can I do to display a string error message in the third box if a letter is entered in one of the first two boxes instead of a number?
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