?
Solved

C# Class subroutines, How to pass the eqivilant of VB's byRef

Posted on 2010-09-24
4
Medium Priority
?
561 Views
Last Modified: 2013-12-16
I have some C subroutines in DLL's that I want to convert to C#. They basically have parms:

Input buffer (bytes)
Input length (int32)
Outbut buffer (bytes)
Output length (int32)

In VB.net, we simply define a subroutine with parameters defined as byRef, for example:

Sub MySub(..., byRef OutBuff() as Byte, byRef outLen as Int32)
        ' Do something
End Sub

This passes the data's pointers to the subroutine (and the length attribute as part of the byte array object). Thus the subroutine does not have any size limit/wasted memory tradeoffs. How do I do this in C#? In my attempts I keep getting "unsafe code", which VB will not allow me to call.

Thank you.
0
Comment
Question by:MikeBroderick
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 10

Expert Comment

by:Umar Topia
ID: 33754221
function MySub(ref bytes[] byInput)
{}
0
 
LVL 10

Accepted Solution

by:
Umar Topia earned 2000 total points
ID: 33754229
Sry abt the typo:

void MySub(ref bytes[] byInput)
{}
0
 
LVL 63

Expert Comment

by:Fernando Soto
ID: 33754303
Hi MikeBroderick;

When calling the method MySub in umartopia example you also need to have the ref key word.

// Calling MySub method:
MySub ( ... ref myByteArray, ... );

Fernando
0
 

Author Closing Comment

by:MikeBroderick
ID: 33754339
Thanks. I'm putting it in now.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

This document covers how to connect to SQL Server and browse its contents.  It is meant for those new to Visual Studio and/or working with Microsoft SQL Server.  It is not a guide to building SQL Server database connections in your code.  This is mo…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

770 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