Visual Basic

Fractions in Visual Basic.Net

6-Aug-05 5:58

i m so sorry that i didnt mention ..
yeah i mean how to Parse a string returned by a TreeViewNode...

Re: parse treeview

Rob Graham7-Aug-05 15:31

Rob Graham

7-Aug-05 15:31

Parse the string to what end? are you tying to convert it to a number or what?

Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

parse treeview

fareee4-Aug-05 20:32

fareee

4-Aug-05 20:32

can anyone tell me how to parse treeview data ????

Desi Bravo4-Aug-05 19:00

4-Aug-05 19:00

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?
Smile | :)

bravo659

Christian Graus4-Aug-05 19:02

Christian Graus

4-Aug-05 19:02

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++

Desi Bravo4-Aug-05 20:49

4-Aug-05 20:49

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.

Christian Graus7-Aug-05 13:14

Christian Graus

7-Aug-05 13:14

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++

toxcct4-Aug-05 20:23

toxcct

4-Aug-05 20:23

TextBoxAnswer.Text = (Double.Parse(TexteBox1.Text) / Double.Parse(TextBox2.Text)).ToString()

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Desi Bravo4-Aug-05 21:05

4-Aug-05 21:05

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

toxcct4-Aug-05 21:12

toxcct

4-Aug-05 21:12

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 ??? Big Grin | :-D

anyway, nevermind, i won't repeat it Laugh | :laugh:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Desi Bravo4-Aug-05 21:22

4-Aug-05 21:22

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.

toxcct4-Aug-05 21:43

toxcct

4-Aug-05 21:43

Search CodeProject[^]

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Kevin McFarlane5-Aug-05 2:26

Kevin McFarlane

5-Aug-05 2:26

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

Kevin McFarlane5-Aug-05 2:28

Kevin McFarlane

5-Aug-05 2:28

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

Desi Bravo7-Aug-05 12:12

7-Aug-05 12:12

I appreciate for your info. I'll try Jesse's book.

bravo659

Anonymous5-Aug-05 9:16

5-Aug-05 9:16

This sounds more like an issue with Math than it is VB .NET Dead | X|

It's just a matter of making the right calculations to display the appropriate whole number.

Desi Bravo7-Aug-05 12:10

How to send mail using Fax Server VB.net

7-Aug-05 12:10

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.

dbkreddy4-Aug-05 17:23

dbkreddy

4-Aug-05 17:23

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

Re: How to send mail using Fax Server VB.net

progload5-Aug-05 4:44

progload

5-Aug-05 4:44

This is it:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fax/faxportal_9nol.asp?frame=true[^]

How to change a control into an array?

rushing4-Aug-05 15:46

rushing

4-Aug-05 15:46

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!

Re: How to change a control into an array?

Daniel13244-Aug-05 16:40

Daniel1324

4-Aug-05 16:40

<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...

Re: How to change a control into an array?

Mohamad Al Husseiny4-Aug-05 16:44

Mohamad Al Husseiny

4-Aug-05 16:44

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

Activating WinForm with Handle (VB .NET)

Anonymous4-Aug-05 9:42

Re: Activating WinForm with Handle (VB .NET)

4-Aug-05 9:42

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?

Empires4-Aug-05 13:47

Empires

4-Aug-05 13:47

you could use interop to use the user32 dll

example here http://www.codeproject.com/vb/net/ActivateSingleAppInstance.asp

Re: Activating WinForm with Handle (VB .NET)

Anonymous5-Aug-05 5:16