.NET (Core and Framework)

Alexandru Savescu28-Jun-02 8:28

Alexandru Savescu

28-Jun-02 8:28

I think it does. Only memmory is managed, but the Managed C++ code is more optimized that C#, actually I think is the only optimized language from .NET. Also with managed you can combine managed and unmanaged code so you can obtain native code for real time actions.

Best regards,
Alexandru Savescu

Christopher Lord28-Jun-02 14:51

28-Jun-02 14:51

Could you direct me to where ms says mc++ is more optimized?

I cant seem to find reference to that.

Joao Vaz26-Jun-02 6:45

Joao Vaz

26-Jun-02 6:45

The 2nd part is faster since dup doesn't need to be verified and it's considered type safe Smile | :)

Cheers,
Joao Vaz
The loved ones never really leave us , they are always alive on our hearts and minds.

Re: and ECMA doc

Joao Vaz26-Jun-02 6:55

Joao Vaz

26-Jun-02 6:55

And since you are interested in Il, check the Ecma-335 specificationthat deals with the Commom Language Infrastructure, in which IL instruction set belongs, here Common Language Infrastructure

Cheers,
Joao Vaz
The loved ones never really leave us , they are always alive on our hearts and minds.

Capturing mouse events on a TreeNode

Rama Krishna Vavilala28-Jun-02 16:12

Rama Krishna Vavilala

28-Jun-02 16:12

I don't think there will be any observable difference between the two. I will really be surprised if your hand optimization gives you more speed than the unoptimized code.

I have never wasted time worrying about such insignificant things. Keep your eye upon the donut and NOT upon the hole. - Bill Sergio about posting in the right forum. The Lounge - June 23, 2002

Newbie Question

Venet23-Jun-02 4:09

Venet

23-Jun-02 4:09

Excuse my (!knowledge ) of WebServices.

Let's say I have a simple WebService that accepts 2 integers and give you back the result of addition.

What's the way to make this service known to other applications. Do you need to setup some central server, so it would keep track of all services (let's say in an Intranet), or is there a standard way to do it ?

Thanks

Venet.

--------
Black holes are where God divided by zero.(Steven Wright)

Re: Newbie Question

SimonS23-Jun-02 5:41

SimonS

23-Jun-02 5:41

Hi Venet

Have a look at UDDI.
If you're doing this more for a test, then maybe link your webservice from XMethods.

HTH

Cheers,
Simon

"Every good work of software starts by scratching a developer's personal itch.", Eric S. Raymond

Re: Newbie Question

Venet23-Jun-02 6:48

Venet

23-Jun-02 6:48

Thanks Simon,

Question answered. This is exactly what I needed.

Venet.

--------
Black holes are where God divided by zero.(Steven Wright)

Andrew Connell21-Jun-02 2:32

Andrew Connell

21-Jun-02 2:32

I've extended the TreeNode control to add an additional property. Now, what
I'd like to do is capture the MouseDown event so I can perform some tasks
when either the left or right mouse button is clicked. However, I can see
that the TreeNode doesn't have any events to override. I tried capturing it
with the TreeView control, but can't get the underlying object that was
clicked.

Any ideas? I was thinking about creating my own custom event in my extended
control (TreeNodeExID)... but I can't find any examples or documentation...

-AC

Andrew Connell
IM on MSN
andrew@aconnell.com

Re: Capturing mouse events on a TreeNode

Chris Rickard21-Jun-02 4:00

Chris Rickard

21-Jun-02 4:00

Override the WndProc procedure and handle the Windows Message WM_LBUTTONDOWN:

class TreeNodeExID : TreeNode
{
    ...
    public const int WM_LBUTTONDOWN = 0x0201;
    protected override void WndProc(ref Message m)
    {
        if(m.Msg == WM_LBUTTONDOWN)
        {
          //DO WORK HERE
        }
        base.WndProc(ref m);
    }
}

RSA Encryption

Ollie20-Jun-02 4:24

Ollie

20-Jun-02 4:24

RSA Parameters has an Exponent value and Modulus value how do i combine these to get the public key

Confused | :confused:

Fill Enum with DB records

Marcelo Duarte19-Jun-02 15:55

Marcelo Duarte

19-Jun-02 15:55

How can I fill ( or create ) a Enum using DB records as items ??

Or How can I override a enum declaration ?

( I want to add items to an Enum declarated in other class )

thanks

Marcelo Duarte
uruguay

Re: Fill Enum with DB records

Christopher Lord21-Jun-02 20:09

Re: Fill Enum with DB records

21-Jun-02 20:09

This may be possible by progmatically writing code and then using Emit() to generate a runtime assembly, and then using that code.

But really, you shouldnt add so much complication. Better to keep the records in their native format.

SimonS23-Jun-02 5:47

SimonS

23-Jun-02 5:47

Christopher Lord wrote:
Better to keep the records in their native format.
Agreed.
It might also be an option to check out Typed Datasets.

Cheers,
Simon

"Every good work of software starts by scratching a developer's personal itch.", Eric S. Raymond

Read From Screen

gibbsnich19-Jun-02 9:02

gibbsnich

19-Jun-02 9:02

Hi!
I want to know if there's an API I can use in .NET that makes it possible to read text from any program if I e.g. do a right-click and hold ALT.
Something like an OCR API reading from screen... well, I don't know how to describe it correctly, but if you know the tool "Babylon Translator" you know what I mean...

Thanks in advance!

File Transfer Using Remoting

SHaroz19-Jun-02 5:19

19-Jun-02 5:19

I have set up a remoting host and client, and they work well. Now I would like the host to send a file to the client, but can't figure out how to do it. I need a function in the remoted object that would look something like this-

Public Function FileTran() as File
return C:\test.txt
End Function

I know this is completely incorrect, but you get the idea of what I'm trying to do.
Can anyone please give me some pointers?

Thanks in advance,
Steve

P.S. VB.NET code prefered, but C# would be fine too.

Christopher Lord21-Jun-02 20:12

21-Jun-02 20:12

Well, look into Stream objects. I've never used them over a remoting link, but if MS did a really good job it should be seemless.

If not, you'll have to chunk and send, which will be slow but will get the job done.
Simply chunk your file into a buffer, and send the buffer across the wire as an array of bytes, and then reconsitute. Thats not gonna be a whole lot of fun, though.

SHaroz24-Jun-02 4:57

24-Jun-02 4:57

Do you think it would matter whether I marshal by ref or serialize? I'm asking because I've never remoted serialized objects, but I've seen them mentioned frequently. Confused | :confused:

Christopher Lord24-Jun-02 12:49

24-Jun-02 12:49

I've only done minimal work over remoting as well. I figure that serializing a remote object will work great, but again I cant be sure. sorry.

SHaroz25-Jun-02 5:30

25-Jun-02 5:30

I've been messing around with streams and had all kinds of problems, so I decided to try putting the file into an array of bytes like you said (thanks for that advice). I'm just wondering if you know what the disadvantage of that is.

Christopher Lord25-Jun-02 11:48

25-Jun-02 11:48

Large files will be very inefficent, since the whole thing will have to be read into ram, and then 'sent' all at once. Since the wire cant send the data all at once, this will cause a 'lock up' unless you use async or threading.

Joel Matthias25-Jun-02 12:44

Joel Matthias

25-Jun-02 12:44

I have tried both methods, returning a file stream vs. filling a big byte[] buffer and I found that the byte[] buffer was much faster which suprised me. I too was worried about the inefficiency of using large chunks of ram but I guess it just depends on the amount of RAM on your server, the average file size and the number of requests served. You could also compress the file data before you put it in the byte[] buffer, saving memory and speeding transfer times.

Joel

SHaroz26-Jun-02 5:22

26-Jun-02 5:22

When you used the buffer method, did you use a singlecall or singleton object? Cause I'm using a singlecall object, and everytime I call the function to send the next buffer, the stream object (that is global in the remoted object) has been erased. On top of that, I can't find a method to have the filestream start at byte X without going back through the file again. Any advice or code snipets you could offer?

Thanks for the info,
Steve

Joel Matthias26-Jun-02 5:41

Joel Matthias

26-Jun-02 5:41

I'm not sure I understand how you are doing the transfer. Basically I tried two methods.

The file stream approach works like this. You will have a remote method like GetFile() which returns a file stream object. The client calls GetFile(). The server creates a new file stream object by opening the desired file on the server machine. The server returns this file stream object to the client. The client is then free to call the Read() on the file stream object and when done Close(). Using this method it does not matter what kind of remote object (Singleton etc.) But this method seems to be kind of slow even when you minimize the number of read calls by making your read buffer large.

The other method I use is to have a remote method GetFile() that returns a byte[]. The client calls GetFile() and the server opens the desired file reads the entire file into the byte[] and returns this to the client. The client is then able to write the entire byte[] to it's local disk. This seems to work very well for me (tested up to 13MB file).

Hope this helps - Joel

SHaroz26-Jun-02 5:50