C# Discussion Boards - CodeProject

Anonymous12-Aug-04 1:31

12-Aug-04 1:31

No worries. That makes more sense. It still doesn't work. I must have the MappingName messed up some how. Whether I do this programmatically or through the properties window, my changes don't take.

Thanks

Bizarre remoting problem: a bug in VS2005

Judah Gabriel Himango6-Aug-04 9:19

Judah Gabriel Himango

6-Aug-04 9:19

I posted here yesterday about a problem I couldn't get my head around: a server would publish an object , a client would connect to it successfully, client would exit, client would attempt to connect again and would hang.

Today I wrote a very very simple test project to see if I could reproduce the problem in the simplest of environments. It turns out I could reproduce the problem with a very basic environment, doing a simple publish server object & activate on client. I would start up the server in debug mode (Visual Studio's right-click->Debug->Start New Instance) and then would do the same for the client, exit the client, then restart the client. Voila it would hang the 2nd time.

So I wondered whether this was a bug in the 2.0 beta framework. I took the code over and recompiled in Visual Studio 2003. Unlike VS 2005, whenever you close one of the debugging projects, all debugged instances are closed in 2003, so I had to manually execute the server then the client. It ran fine.

I thought for sure now that it was a 2.0 beta bug. Then it occurred to me that since the method of actually executing these test projects were different (2005 I could close the client while in debug mode while keeping the server in debug mode, whereas 2003 closes all debugging executables when one of them exits). So, I tried manually running the 2.0 executables. And whaddya know, it works fine.

To summarize, Visual Studio 2005, at least the express edition, has an issue with debugging multiple running executables simultaneously; it requests input (and suspends all execution) from the remaining debugging executable (the server in this case) when the other debugging executable (the client) has stopped debugging and exited.

I've uploaded a example case at http://www25.brinkster.com/swamii/RemotingBugInVS2005.zip

And the name on the zip is misleading :-p Not really a Remoting bug, just a bug or design flaw that happened to occur while I was writing some remoting code.

Thanks to Heath Stewart, Brian Gideon, and Tom Larsen for offering suggestions when this problem occurred yesterday.

Judah Himango

Re: Bizarre remoting problem: a bug in VS2005

leppie6-Aug-04 9:32

leppie

6-Aug-04 9:32

beta software are meant to have bugs, else it would have been released already. This also probably a known bug. Refer to the proper bug submission on the beta site.

^{top secret xacc-ide 0.0.1}

Re: Bizarre remoting problem: a bug in VS2005

eggie56-Aug-04 9:59

eggie5

6-Aug-04 9:59

beta software is....

/\ |_ E X E GG

Hex display in PropertyGrid

Nick Hounsome6-Aug-04 9:06

Nick Hounsome

6-Aug-04 9:06

How can I get the PropertyGrid to display numbers in hex like you can in the VS debugger?

I'm sure that it can be done on a per object basis but I want general dynamically switchable.

Get email list from Exchange/domain

Asad Hussain6-Aug-04 8:22

Asad Hussain

6-Aug-04 8:22

Hi,

I am looking to get a list of users, specifically email addresses from an NT/2003 domain. Is there an easy way of doing this coz i have absolutely no idea how to approach the problem.

Thanks.

Multi-threading

Guinness4Strength6-Aug-04 7:55

Guinness4Strength

6-Aug-04 7:55

I'm implementing a background thread that updates the poistion of the Label control on a Form. I was told by Leppie that I was not correctly implementing the ISynchronizeInvoke interface. Can anyone tell me what I'm doing wrong ?

//delegate def
private delegate void ScrollThreadDelegate();

...
...
//setup scroll thread in FormLoad event
ScrollThread = new Thread(new ThreadStart(ScrollThreadFunction));
ScrollThread.IsBackground=true;
ScrollThread.Start();
...

//background thread function
private void ScrollThreadFunction()
{
	while(RunScrollThread)
	{
		if(lbSongInfo.InvokeRequired)
		{
			this.lbSongInfo.Invoke(new ScrollThreadDelegate(this.ShowScrollText));
		}
		Thread.Sleep(50);
	}
}

//actually update the label control's position
private void ShowScrollText()
{
	if(lbSongInfo.Location==SongInfoEnd)
		lbSongInfo.Location=SongInfoStart;
	Point CurPos = new Point(lbSongInfo.Location.X,lbSongInfo.Location.Y);
	CurPos.Offset(-1,0);
	lbSongInfo.Location=CurPos;
}

Change decimal symbol

Member 11981926-Aug-04 6:55

Member 1198192

6-Aug-04 6:55

Hi people,
I would be the happiest man on Earth if someone tells me how can I change the decimal symbol programmatically. I mean as my program starts i want to parse the strings in a way that the dot is always the decimal symbol no matter what regional settings are set on the PC.

Kamen Boyadjiev

Re: Change decimal symbol

Colin Angus Mackay6-Aug-04 7:29

Colin Angus Mackay

6-Aug-04 7:29

You could get hold of a copy of a NumberFormatInfo object and modify the NumberDecimalSeparator to the desired character.

NumberFormatInfo nfi = Thread.CurrentThread.CurrentUICulture.NumberFormat.Clone();
nfi.NumberDecimalSeparator = ".";
string myFormattedDouble = myDouble.ToString(nfi);

The above assumes the existance of a double called myDouble

Does this help?

"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

Re: Change decimal symbol

Member 11981926-Aug-04 8:06

Member 1198192

6-Aug-04 8:06

Hi Colin,
thank you for your fast reply. This is really good idea but actually it does not help in my case. Actually I did not expressed my problem quite well. If I have a in a TextBox the string "1.2" I need to parse it as a 1.2 number and the problem is that when I have different decimal symbol not the dot I get quite astonishing numbers, such as for example 1200 by a german language settings due to that the dot is a digit grouping symbol Smile | :)

. So my program must not take the german regional setting (if it is set so) but the english(united states) one.
Thank you in advance for any help

Re: Change decimal symbol

Colin Angus Mackay6-Aug-04 10:48

Colin Angus Mackay

6-Aug-04 10:48

It is not too different from the code I provided above

CultureInfo ci = new CultureInfo("en-US");
NumberFormatInfo nfi = ci.NumberFormat;
double myParsedDouble = myDouble.Parse(txtMyTextBox.Text, nfi);

As the US English Culture already has the correct number format for parsing 1.2 as six fifths rather than 1200 you don't need to create a clone of NumberFormatInfo object and modify it.

Does this help?

Re: Change decimal symbol

Member 11981926-Aug-04 12:32

Member 1198192

6-Aug-04 12:32

Well Colin that sure would help. Really thank you for that help. Actually quite stupid from me that I have not noticed that to Parse could be passed a CultureInfo too. Really much obliged Smile | :)

Re: Change decimal symbol

Dave Kreskowiak6-Aug-04 7:41

Dave Kreskowiak

6-Aug-04 7:41

Opps... Might have helped if I actually read into the System.Globalization namepsace first...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

How can i capture video

Member 12810976-Aug-04 6:45

Member 1281097

6-Aug-04 6:45

1)when i use c# How can i take photo from my webcam ?
2)When i use c# What code do i have to write for entering button on the winamp?(For example i open the winamp program from C# and i want to use winamp program after i write the code in the c# i will enter the button it will play.)

Transparent Panel

kbson16-Aug-04 6:27

kbson1

6-Aug-04 6:27

I can't believe I can't make a panel transparent, Mad | :mad:

I've spent a good couple of hours this morning, if I set the panel to transparent what seems to happen is the panel is drawn with the same color as the form which is ok, but if I have other stuff behind the panel that I want to show throught the panel, then I can't see those controls.

Any help is appretiated.

Re: Transparent Panel

Not Active6-Aug-04 10:14

Not Active

6-Aug-04 10:14

You have to set the panel order to background or drop the controls you want to show through in the panel.

Re: ORACLE: TNS Packet Writer Failure w/ ADO. NET

Dave Kreskowiak6-Aug-04 7:26

Dave Kreskowiak

6-Aug-04 7:26

I'm no expert in Oracle, but my first guess would be to remove the colons you put in the parameter names.

cmd.CommandText = "SELECT * FROM USERS WHERE USER_ID = pUserId"
cmd.Parameters.Add( new OracleParameter( "pUserId", OracleType.VarChar )).Value = "[USER_ID]" )

Putting "special" characters in an identifier is just not a good idea in any language.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: ORACLE: TNS Packet Writer Failure w/ ADO. NET

Nick Parker6-Aug-04 7:28

Nick Parker

6-Aug-04 7:28

This question belongs in the Visual Basic / VB.NET[^] forum.

- Nick Parker
My Blog | My Articles

creating a vu-meter

gumigyuri6-Aug-04 5:00

gumigyuri

6-Aug-04 5:00

Hi@all,

I would like to create a Vu-meter application in C# to display for any sound that goes to the sound card ,but I don't know how D'Oh! | :doh:

Can anyone help me on how to capture the sound and make the app. work Wink | ;)

?
code?

Thanx.

Converting from a Byte Array to an int / double

bob rt456-Aug-04 4:58

bob rt45

6-Aug-04 4:58

I'm relatively new to C#.

I need to find a way to convert a section of a byte[] to an double or convert to an int if required.

In C++ I would use the algorythms below but I don't know how to express this in a form that c# is happy with.

for an int

BYTE dBytes[4];
int ret = *(int*) dBytes;

for a double

BYTE dBytes[8];
int ret = *(int*) dBytes;

Re: Converting from a Byte Array to an int / double

MicrosoftBob6-Aug-04 5:15

MicrosoftBob

6-Aug-04 5:15

Check out System.BitConverter.

Thanks That's it

Bob rt456-Aug-04 5:34

Bob rt45

6-Aug-04 5:34

Brilliant, Thats exactly what I was looking for.

Device

sreejith ss nair6-Aug-04 3:26

sreejith ss nair

6-Aug-04 3:26

hi,

i want to do some device related application using C#(say for eg. TAPI).

Any article or books for this ???

**************************
S r e e j i t h N a i r
**************************

Re: Device

Dave Kreskowiak6-Aug-04 3:46

Dave Kreskowiak

6-Aug-04 3:46

You're going to have to be alot more specific about what your trying to do.
Define "device related" and what device?

C# and VB.NET are too high level for efficient device driver work...

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Device

Nick Parker6-Aug-04 3:59

Nick Parker

6-Aug-04 3:59

Have you searched the Internet yet? There is a project on GotDotNet using TAPI in C#, there is also this book too: Network Programming in .NET[^]

- Nick Parker
My Blog | My Articles

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