Managed Extensions and XML question

[BCC]

Hi,

I have a need to read in a very simple xml file and initialized some objects
from the data. I was reading on the ms website that .net contains its own
XML parser, and it sounds pretty good for what I need.

However, to use the code, it looks like I need to compile with managed
extensions. Since my project does not use managed extensions, I am not sure
what the ramifications are of using them in regards to performance.

So two real questions:
1. What is the performance hit or improvement in using managed extensions?
2. If I wish to use code that uses the managed extension syntax, is it
possible to compile this code
without using managed extensions?

Any thoughts or insights are appreciated!

Thanks,
Bryan

[Carl Daniel [VC++ MVP]]

BCC wrote:

So two real questions:
1. What is the performance hit or improvement in using managed
extensions?
Usually a huge hit in app startup time, with steady-state performance
comparable (may be worse, may be better, usually within 10-20% or so).
2. If I wish to use code that uses the managed extension syntax, is
it possible to compile this code
without using managed extensions?
No. The mere question is a contradition.
Any thoughts or insights are appreciated!

Use MSXML. It's easy to use from native (unmanaged) C++ and it's faster than
the .NET XML parser.

If you want a lightweight solution that doesn't require installing anything
on the deployment machine (like .NET or MSXML), take a look at libXML
(www.xmlsoft.ort). It's a cross-platform Xml parser that's small, fast and
easy to use.

-cd

[BCC]

>> So two real questions:

1. What is the performance hit or improvement in using managed
extensions?

Usually a huge hit in app startup time, with steady-state performance
comparable (may be worse, may be better, usually within 10-20% or so).

Okay, seems reasonable.

2. If I wish to use code that uses the managed extension syntax, is
it possible to compile this code
without using managed extensions?

No. The mere question is a contradition.

Not really. What I meant was that the xml managed code uses a specific
syntax to import namespaces, and requires the mscorlib.dll. I was wondering
if you could access the same functions and namespaces somehow with unmanaged
code.

Any thoughts or insights are appreciated!

Use MSXML. It's easy to use from native (unmanaged) C++ and it's faster
than the .NET XML parser.

If you want a lightweight solution that doesn't require installing
anything on the deployment machine (like .NET or MSXML), take a look at
libXML (www.xmlsoft.ort). It's a cross-platform Xml parser that's small,
fast and easy to use.

-cd

Thanks! I will go check this stuff out. Thanks for the suggestions.

B

[Carl Daniel [VC++ MVP]]

BCC wrote:

2. If I wish to use code that uses the managed extension syntax, is
it possible to compile this code
without using managed extensions?

No. The mere question is a contradition.

Not really. What I meant was that the xml managed code uses a
specific syntax to import namespaces, and requires the mscorlib.dll. I was
wondering if you could access the same functions and namespaces
somehow with unmanaged code.

No, you can't - you can only access the managed XML classes from managed
code. That said, you can of course mix managed and unmanaged code in a
single application.

-cd

[Carl Daniel [VC++ MVP]]

Carl Daniel [VC++ MVP] wrote:

If you want a lightweight solution that doesn't require installing
anything on the deployment machine (like .NET or MSXML), take a look
at libXML (www.xmlsoft.ort). It's a cross-platform Xml parser that's
small, fast and easy to use.

Uh, I meant www.xmlsoft.org, of course.

-cd