Solved

How to set a bit in a short value

Posted on 2010-11-08
5
290 Views
Last Modified: 2012-06-22
I have a VB.NET windows forms project. One of the values i am sending to a tool is a short value with a max of 2050. I need to be able to set the last bit of this short to either a 0 or a 1 based on some other criteria.

Need suggestions and / or pointers to how to do bit manipulation in VB.NET. Found lots of bit shifting but thats not what i need.

Cheers
0
Comment
Question by:Halon
  • 2
  • 2
5 Comments
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 34087133
You can use the standard boolean operators (AND, OR, etc.) to do bit manipulation:
    Sub Main()
        Dim test As Short = 0
        Dim mask As Short = 1 << 2

        test = test Or mask

        Console.WriteLine(test)
        Console.ReadKey()
    End Sub

Open in new window

0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 34087157
I meant to say "logic", not "boolean"  :)
0
 
LVL 32

Accepted Solution

by:
Erick37 earned 500 total points
ID: 34087222
Dim s As Short = 100

'Set the bit
s = CType(s Or 1, Short)

Debug.WriteLine(s)

'Clear the bit
s = CType(s And 254, Short)

Debug.WriteLine(s)
0
 
LVL 32

Expert Comment

by:Erick37
ID: 34087276
Hold on.
'Clear the bit (if positive)
s = CType(s And 32766, Short)
0
 

Author Closing Comment

by:Halon
ID: 34102957
Worked great, cheers!
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Multiple file Upload asp.net 2 49
Get Top Visible Row of Datagridview 6 32
Help with AsEnumerable(), LINQ 4 38
write xml in vb.net 2 24
It’s quite interesting for me as I worked with Excel using vb.net for some time. Here are some topics which I know want to share with others whom this might help. First of all if you are working with Excel then you need to Download the Following …
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…
In a recent question (https://www.experts-exchange.com/questions/28997919/Pagination-in-Adobe-Acrobat.html) here at Experts Exchange, a member asked how to add page numbers to a PDF file using Adobe Acrobat XI Pro. This short video Micro Tutorial sh…

816 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

7 Experts available now in Live!

Get 1:1 Help Now