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Re: using Byte[] in a WebService method??

leppie26-Jun-03 15:12

leppie

26-Jun-03 15:12

Uploader wrote:
I receive a NullReference Exception on the entry of this [WebMethod]:

Thats because the filestream is null, not the byte[]. Try making the filestream static to make sure that is the problem, then figure out how you would prefer to handle it.

Hope this helps Smile | :)

PS: Remember a webservice is only a website with methods.

leppie ::AllocCPArticle(Generic DFA State Machine for .NET);

Re: using Byte[] in a WebService method??

Uploader29-Jun-03 10:13

Uploader

29-Jun-03 10:13

thanx I made an error, because I declared the filestream as a property of the class, but in the constructor I haven't notice that I'm overwriting it.
myclass{
private Filestream fs;
myclass(){
Filestream fs=........;
}
}

BUT
using WebService my method scrivi(byte[]) doesn't work, instead it works using remote object.

Marco

What Other Options Beside System.Data.OleDb? Critical For Me, Please!

Khang Nguyen26-Jun-03 11:55

Khang Nguyen

26-Jun-03 11:55

Hello all gurus,

I just discovered that one of my tables in my MS Access DB happened to name "Module". Any simple SELECT statement to this table would crash with "E_FAIL: Unspecified Error 80004005" when I do:
...
OleDbReader rd = myOleDbCommand.ExecuteReader(...);

Currently I use:

OleDbConnection con = new OleDbConnection();
con.ConnectionString = "Provider=Microsoft.JET.OLEDB.4.0;" + "data source = " + frmModularDocsSystem.sDBFullPathName;

QUESTION:
Can I use a newer or older version of Microsoft.JET.OLEDB engine? or RDO? or Something else? to get around this weird problem. So, I don't have to rename my "Module" table. Because Changing its name will break an un-measured amount of codes in my existing applications, if that's the last solution.

Thanks a billion $ to you all
Khang Nguyen
Cry | :((

PS: or may you have other tricks?

Re: What Other Options Beside System.Data.OleDb? Critical For Me, Please!

Anonymous26-Jun-03 14:41

Anonymous

26-Jun-03 14:41

Can you but [] around the table name like you can in sql server? Try that

Select * from [Module] might work I don't have access on this machine to try it.

Re: What Other Options Beside System.Data.OleDb? Critical For Me, Please!

Khang Nguyen27-Jun-03 4:57

Khang Nguyen

27-Jun-03 4:57

WOW! You're great! It works like a miracle. You saved me. Thanks so much.
Khang Nguyen
Wink | ;)

Using framework version 1.1

monrobot1326-Jun-03 10:32

monrobot13

26-Jun-03 10:32

Hi,

I've started writing a program using version 1.0 of the framework, but now I would like to install version 1.1 and start using that. Do I need to do anything special with my application in order to get it to use version 1.1 of the framework instead of version 1.0 ?

Thanks

- monrobot13

Re: Using framework version 1.1

Giles26-Jun-03 11:02

Giles

26-Jun-03 11:02

Nope. MS Have done a good job of getting the new version to play nicely with the first. You will need a copy of the latest version of VS though, but you can upgrade for $30.

Smile | :)

"Je pense, donc je mange." - Rene Descartes 1689 - Just before his mother put his tea on the table.

Shameless Plug - Distributed Database Transactions in .NET using COM+

Volume control in C#

ripsi26-Jun-03 10:17

ripsi

26-Jun-03 10:17

How do you access the volume control in c#? Is there a way to do it w/o using direct x? Any help would be appreciated.

Reading Password from Console

Jarrett Vance26-Jun-03 9:08

Jarrett Vance

26-Jun-03 9:08

I'm trying to read a password from the Console and I need it to hide what is being typed. I'm using System.ReadLine() but I can't figure out how to hide what is being typed. There must be simple solution but I can't find it. Any ideas?

Re: Reading Password from Console

leppie26-Jun-03 9:37

leppie

26-Jun-03 9:37

You will have to look at the Win32 Console API, specifically turning on/off echoing, and will you are there colors are a breeze too Smile | :)

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Re: Reading Password from Console

Paresh Gheewala26-Jun-03 15:29

Paresh Gheewala

26-Jun-03 15:29

may be using Win32 Old API Wink | ;)

it can be possible !!

Removing legacy app from task bar.

albean26-Jun-03 7:08

albean

26-Jun-03 7:08

I have an old Win32 legacy app. I’m able to start the process and send key presses to it (via sendmessage) from another app. What I would like to do is remove this program from the taskbar. An ideas?

setting CreateNoWindow=true; does not work

I start the process with this:

mp = new Process();
mp.StartInfo.FileName = AppPath+"\\Win32App.exe";
mp.StartInfo.WindowStyle= ProcessWindowStyle.Minimized;
//This next line does not work 
mp.StartInfo.CreateNoWindow=true; 
mp.Start();

Finalization

Kant26-Jun-03 6:58

Kant

26-Jun-03 6:58

Can anyone explain me what this mean? Is it related to Dispose()?

Make the component implement both deterministic and non-deterministic finalization

"...if you don't want to hear things that piss you off don't piss off other people. SIMPLE." - Steven Hicks
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Re: Finalization

albean26-Jun-03 7:03

albean

26-Jun-03 7:03

Take a look at the MSDN article "Gozer the Destructor"

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/deepc10192000.asp

Re: Finalization (Clickety)

Kant26-Jun-03 7:14

Kant

26-Jun-03 7:14

Gozer the Destructor[^]

Thx for the link.

"...if you don't want to hear things that piss you off don't piss off other people. SIMPLE." - Steven Hicks
This signature was created by "Code Project Quoter".

Re: Finalization

leppie26-Jun-03 7:08

leppie

26-Jun-03 7:08

Kant wrote:
deterministic

aka Dispose() done by user

Kant wrote:
non-deterministic

aka ~Class or Finalize() done by GC

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Re: Finalization

Kant26-Jun-03 7:18

Kant

26-Jun-03 7:18

leppie wrote:
aka ~Class or Finalize() done by GC

So I have to implement the ~Class for my component or just override the Finalize()?

Make the component implement both deterministic and non-deterministic finalization

"...if you don't want to hear things that piss you off don't piss off other people. SIMPLE." - Steven Hicks
This signature was created by "Code Project Quoter".

Re: Finalization

leppie26-Jun-03 7:37

leppie

26-Jun-03 7:37

A component derived class should already implement IDispose, override Dispose() (if and only if you have unmanaged resources that need to be freed)

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Re: Finalization

Arun Bhalla26-Jun-03 11:54

Arun Bhalla

26-Jun-03 11:54

Here[^]) is an article that is newer than the other one, which has a nicer design pattern for handling disposing and finalizing.

Re: Finalization

albean26-Jun-03 12:02

albean

26-Jun-03 12:02

Arun,

Thanks for pointing that article out. It is much better. (If fact one example in the older article will not compile w/ .NET 2003).

Thanks again.

Oject memory adress.

GriffonRL26-Jun-03 6:49

GriffonRL

26-Jun-03 6:49

Hello,

I'm looking for a way to get the memory adress of a C# object.
Any idea is welcome Smile | :)

.

Thanks,

R. LOPES
Just programmer.

Re: Oject memory adress.

leppie26-Jun-03 7:01

leppie

26-Jun-03 7:01

This is specifically hidden to the user as object address change continuously due to the GC. If you debug a program with CorDbg, these addresses will be shown, but like said, unlike C/C++ they are likely to move during each garbage collection.

Cheers Smile | :)

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Re: Object memory adress.

GriffonRL26-Jun-03 7:28

GriffonRL

26-Jun-03 7:28

Hi Leppie,

I was expecting something like that. It makes totally sense. I'm now sure.

Thanks,

R. LOPES
Just programmer.

Re: Object memory adress.

leppie26-Jun-03 7:44

leppie

26-Jun-03 7:44

You wont believe it, but I'm stuck with this issue as well (building a VM emulating the CLR VM on top of .NET). If you are intereseted look at the ld.XXXa IL instructions. There seems to be no highlevel functions for this. Maybe something like this would work (no it wont dammit). Maybe...

load an address on stack and then return that as IntPtr, but you have to carefull...

As you can see I'm bit lost too! What I do know (think rather) is that be default GetHashCode() returns the signed addr of a non Value /String object.

I could be wrong.

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Re: Object memory adress.

GriffonRL26-Jun-03 8:31

GriffonRL

26-Jun-03 8:31

Hi Leppie,

What is this crazy idea of yours to build a VM on top of the VM of .NET Smile | :)

?
Nevertheless, thank you for sharing with me your researches.
By the way, for your nBass project, the BASS library has just been updated to 1.8a.

Cheers,

R. LOPES
Just programmer.

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