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I am using visual basic.net only.
I need some help in fractions. How can I use the fractions in system.math to create a fraction program?
I will use two textboxes and a label for the answer within a form
and i will be adding, subtracting, multiplying, and dividing. Can anyone assist with a sample code?
bravo659
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What fractions in System.Math ? VB.NET has numeric types, your core need is Convert.ToDouble(), to convert the text entered into a non-whole number, and ToString, to convert back to a string to put in the label. The rest is trivial.
Christian Graus - Microsoft MVP - C++
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I appreciate for your time. I am an intermediate programmer, I am not an expert like you. So being trivial I really dont think so in my part. I am trying to learn this solution. I enter a numerator and denominator in the textboxes. There is no text to convert. Trying to figure out how to use the numerator and denominator in a fractional sense in a program. Don't know if i would use the abs or just something else to get the result in the label as a fraction.
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There is nothing in the Math namespace to show fractions as fractions. You need to convert to numbers, work out a whole number part, and render it all as text yourself.
Christian Graus - Microsoft MVP - C++
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TextBoxAnswer.Text = (Double.Parse(TexteBox1.Text) / Double.Parse(TextBox2.Text)).ToString()
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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I appreciate for your help, but I already know to convert a fraction to a decimal. The code is related only to fraction conversion to decimal.
I would need to know how to render an answer in fraction not decimal.
For instance, 5/8 + 1/8 = 6/8 reduces to 3/4.
So therefore, the textbox1 will be the numerator and textbox2 will be denominator. The third textbox will return the fractional value.
Or textbox3 will be the numerator and textbox4 will be the denominator and this will invoke the answer. I am having the problem of generating a code for the above instance in fractions.
bravo659
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ah, but you never said you wanted to make a formal calculus...
i never searched for that exactly, but looking at some math parsers here on CP should help you to achieve your goal.
moreover, don't 5/8 + 1/8 make 6/8 ??? 
anyway, nevermind, i won't repeat it 
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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It's only an example.
In a tape measure would be 3/4 of an inch.
And Yes, it would also be 6/8 but reduce it to the LCD would be 3/4.
That's the only problem that I am having, using the fractional portion to render an answer in fractions. There is a site called Break Tru, and they are selling a fraction and decimal program, but can't get the code for that program. For what I want it for is for several fraction programs.
Does your home have heat oil. Then you would know that the tank only reads in fractions. I created a program that will give you how much oil you have in your tank and the amount you need to refill it, and how much it will cost you, and the amount of tax and a grand total. I also added on the form a fraction to decimal converter, which is the only i can offer under that program because I don't know how to render the fraction resulting in fractions. If you know of anything or a book that I can purchase in algorithm please let me know. I am up to programing almost in calculus. LOL
Thanks Bro for your help.
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If you go to Jesse Liberty's site
http://www.libertyassociates.com/pages/book_edit.htm[^]
and download the source code for Programming C# 3rd edition then you'll find a (simplified) Fraction class that you could perhaps adapt for your purposes. It's in the Ch 6 folder.
Kevin
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Re: Jesse Liberty - Programming C# - he has a VB .NET version of the same book with source code so you could download the source for that one instead.
Kevin
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I appreciate for your info. I'll try Jesse's book.
bravo659
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This sounds more like an issue with Math than it is VB .NET 
It's just a matter of making the right calculations to display the appropriate whole number.
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Oh no, i know how to calculate fractions without a problem, is that how do you use the textboxes to display fractions. That's the problem.
I've seen it done through C#, but I tried to use it in VB.Net, and it doesn't work. So the solution is in progrmming in VB.Net. That's all.
I appreciate for your feedback.
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Hi All,
How to send a mail using fax server (using fax machine). What are the prerequists to develop the application. This I need to develop using Visual Basic.Net.
Thanks in advance.
Regards
DBKREDDY
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Here is a control on a winform.
I want to create an array of this control.
In vb 6.0 , we just copy and paste the control, the compiler will create array of control automautically.
However, we could not do so in vs.net.
Maybe friends will teach me.
Thanks!
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<br />
' For array of text boxes<br />
Dim txtBoxArray as TextBox()<br />
Dim x as Integer<br />
For Each ctl As Control In Me.Controls<br />
If TypeOf ctl Is TextBox Then<br />
ReDim Preserve txtBoxArray(x)<br />
txtBoxArray(x) = ctl<br />
x += 1<br />
EndIf<br />
Next<br />
You can access them like txtBoxArray(0), txtBoxArray(1), ect...
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Do array of controls in your code
Contols like any object in .net
so you can create control of TextBoxs for example
Dim textBoxs(5) As TextBox
and access each control via index
MCAD
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Is it possible to activate a winform using its handle?
For example, if you know the handle (intptr) and the window is minimized or behind another window. Is it possible to Activate the winform using that handle?
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you could use interop to use the user32 dll
example here http://www.codeproject.com/vb/net/ActivateSingleAppInstance.asp
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Is there a way without doing it with using the WinHelper? I've seen that link before...but I'm trying to look for another solution without using the WinHelper.
Any suggestions?
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You don't have to put that stuff in it's own class. You can just put the same code into your form code if you want. But, keeping all of your Win32 wrappers in a seperate class like that makes it very easy to reuse without having to copy and paste gobs of code everywhere.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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Hi all,
I have 20 or so VB6.0 macros, including an AutoExec macro that I use in Word. Once in a while Users complain that as they type characters into a new, or existing doc, the characters are slow to appear on the screen. My macros only run at the opening of new documents, or the saving/closing of documents. All macros are called by Users via function keys. Only AutoExec is run when Word opens (if I understand the docs correctly). So I "think" none of my code is actually running while a User is in a new, or existing doc, and typing away.
What object do I test to see the current state of the char buffer that Word stores the characters as the User types them in ? I assume the chars are stored somewhere in an object in Word, question is what is it and can I access it and flush it to the screen if it's getting too big ?
Any ideas what is going on here ?
Ed
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Ed Mansky wrote:
What object do I test to see the current state of the char buffer that Word stores the characters as the User types them in ?
There isn't one. The keystrokes are queued up in Word's window message queue waiting to be processed.
Since the message queue isn't being processed very quickly, the keystrokes aren't getting to the application code, so it looks like it's dragging. This can be caused by your macro code hanging up in a long running loop or some other code, even in Word itself, that is taking all this time to process.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
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