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Programming and Scripting => .NET Framework => Topic started by: Kryptonite on August 31, 2013, 01:47:36 PM

Title: Visual Basic - Real time graphing
Post by: Kryptonite on August 31, 2013, 01:47:36 PM

Good day guys,


I am currently working with VB 2010, and am to receive values via RS232 communication, and plot these received values in a real time graph.


I have searched the net, but I cannot seem to narrow down on a proper tutorial or explanation on how to achieve this.


Would anybody here be able to help or explain what needs to be done?


Thanks in advance

Title: Re: Visual Basic - Real time graphing
Post by: Kulverstukas on August 31, 2013, 08:38:00 PM

Do you HAVE to use VB? It would be easier in Python.
http://pyserial.sourceforge.net/
Used this once, worked great: http://matplotlib.org/

Title: Re: Visual Basic - Real time graphing
Post by: Kryptonite on September 01, 2013, 09:27:48 AM

I'm not forced to use VB, but that's what I'm familiar with, because I still have to create a GUI and perform several other functions and interact with databases. If I use Python, I'll have to learn the language first

Title: Re: Visual Basic - Real time graphing
Post by: Kulverstukas on September 01, 2013, 10:16:42 AM

You'll end up making it in Python faster than VB either way. I'd go with python if I were you.

Title: Re: Visual Basic - Real time graphing
Post by: ArkPhaze on November 01, 2013, 02:56:58 AM

In the event that he can't go with Python... What kind of graph are you looking for @OP? It's easy enough to create a custom graph control using GDI in .NET. I've made a few of them already. But there are chart controls already available to you.

Title: Re: Visual Basic - Real time graphing
Post by: Kryptonite on December 02, 2013, 11:12:26 PM

I was able to use a few chart controls built into the VB environment. If anybody needs any help with a similar problem in the future, contact me and I shall provide my code and project

Title: Re: Visual Basic - Real time graphing
Post by: Kulverstukas on December 03, 2013, 05:26:46 AM

Quote from: Kryptonite on December 02, 2013, 11:12:26 PM

I was able to use a few chart controls built into the VB environment. If anybody needs any help with a similar problem in the future, contact me and I shall provide my code and project

And why not share it now?

Title: Re: Visual Basic - Real time graphing
Post by: Kryptonite on December 03, 2013, 03:30:07 PM

The goal of the project attached was to:
- receive information in the form of a string via serial communication
- extract the various readings
- plot and display a real time graph
- and to save various values into a database


Use it as you will, but please make sure not to include any of the names in the project


(it may not work if the database directory isn't corrected)

Title: Re: Visual Basic - Real time graphing
Post by: ArkPhaze on December 10, 2013, 03:59:58 AM

IMO you should be using more features of the language to write such a project. Arrays, etc... All you have is repeated code, a bunch of forms, single letter variables, a lack of loops that would've been valuable in more than several cases, and more. Where's your separation of concerns?

Functions? Classes?  ???