CultureInfo and DateTime settings - C# Discussion Boards

Re: Print Multiple instances of the same form

ferronrsmith19-Jan-09 9:10

ferronrsmith

19-Jan-09 9:10

It would be nice if you directed me to them Confused | :confused:

Ferron

Re: Print Multiple instances of the same form

#realJSOP19-Jan-09 9:16

#realJSOP

19-Jan-09 9:16

No, it would be pandering to your laziness.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Problem with com creation in C#

Arish rivlin19-Jan-09 3:00

Arish rivlin

19-Jan-09 3:00

I created an activex com object and would like to create an instance in a c# form. when adding the component with the wizard it creates a new instance with "new" end every C# exe gets its one inctance. I am looking for the equivalent C# whay to CoCreate: create the com object only if not exists, get the currantly active instance otherwise. I think the solution lies somware in interop services but failed to find a solution so far....

Re: Problem with com creation in C#

Not Active19-Jan-09 3:20

Not Active

19-Jan-09 3:20

C# doesn't have an equivalent to CoCreate, its all hidden behind the interop wrapper. You just have to create an instance of the object in question. If you want a single instance of this object then you need to use a Singleton pattern.

only two letters away from being an asset

How to get the list of Href Links From HTML

wasimsharp19-Jan-09 2:39

wasimsharp

19-Jan-09 2:39

hi friends,
i have read the Stream of the webpage code is

String page = "http://www.google.com";
HttpWebRequest site = (HttpWebRequest)WebRequest.Create(page);
HttpWebResponse response =      (HttpWebResponse)site.GetResponse();
Stream dataStream = response.GetResponseStream();
StreamReader read = new StreamReader(dataStream);
String data = read.ReadToEnd();

Now i need to Get the Href of all the images used in this Webpage so that i can download it one by one how can i serach Href and get the link out of it.

WANTED wasim khan(Killed 50 Innocent Buggs, Distroyed 200 Exception, make 5 Project Hostage) any Compnay Hire him will pay 30,000. Best place where u can get him is Sorcim Technologies Murre Road RWP

Re: How to get the list of Href Links From HTML

Paddy Boyd19-Jan-09 2:42

Paddy Boyd

19-Jan-09 2:42

You probably want to use a regular expression to get the <a> tags in the page and then strip the href out of them.

Re: How to get the list of Href Links From HTML

J a a n s19-Jan-09 3:52

J a a n s

19-Jan-09 3:52

See this[^] article

*jaans

CultureInfo and DateTime settings

Rick van Woudenberg19-Jan-09 2:33

Rick van Woudenberg

19-Jan-09 2:33

Gents,

I have the following problem that drives me insane. I've written a service that runs in the background. However, I can't get the DateTime format right. I must have tried everything to get it right, but to no avail. When the service starts or stops, it will tell me by writing to a log file. The output of the log file looks like this :

1/19/2009 1:48:40 PM Manager: Service Stopped<br />
1/19/2009 1:48:43 PM Manager: Service Started<br />
1/19/2009 2:17:05 PM Manager: Service Stopped<br />
1/19/2009 2:17:29 PM Manager: Service Started<br />
1/19/2009 2:18:02 PM Manager: Service Stopped<br />
1/19/2009 2:20:27 PM Manager: Service Started

Now .. When it writes to the logfile, it uses the above format for DateTime.Now , while I want to use "dd-mm-yyyy HH:mm:ss"
I set the regional setting in Control Panel as well as the Date and Time format. It shows up perfect in my system clock. It still spits out the above to the logfile. Then I tried the following in my code, so set it programmatically :

// The main entry point for the process
static void Main()
{
    //Set the culture
    CultureInfo newCulture = new CultureInfo("en-US", false);
    newCulture.DateTimeFormat.FullDateTimePattern = "dd-mm-yyyy HH:mm:ss";
    System.Threading.Thread.CurrentThread.CurrentCulture = newCulture;

    System.ServiceProcess.ServiceBase[] ServicesToRun;
    // More than one user Service may run within the same process. To add
    // another service to this process, change the following line to
    // create a second service object. For example,
    //
    // ServicesToRun = New System.ServiceProcess.ServiceBase[] {new WinService1(), new ySecondUserService()};
    //
    ServicesToRun = new System.ServiceProcess.ServiceBase[] { new RealTime() };
    System.ServiceProcess.ServiceBase.Run(ServicesToRun);
}

That didn't fix it .. still the same output.
When I put a MessageBox in between somewhere to let me show DateTime.Now.ToString(), it also comes back with 1/19/2009 2:20:27 PM. Some of the methods in the service report an invalid <code>DateTime</code> conversion when I try the following code :

DateTime time = Convert.ToDateTime("19-01-2009 13:12:56");

It drives me insane. Can please someone point me in the right direction ?

Kind regards,

Re: CultureInfo and DateTime settings

Arish rivlin19-Jan-09 3:05

Arish rivlin

19-Jan-09 3:05

You can try this line:
DateTime.Now.ToString("MMM dd,yy HH:mm:ss", CultureInfo.InvariantCulture)
I think it will solve your problem Cool | :cool:

Re: CultureInfo and DateTime settings

Rick van Woudenberg19-Jan-09 4:43

Rick van Woudenberg

19-Jan-09 4:43

Thank you for your feedback,

it does indeed fix half of my problem. I can get the date right in the logfile, however .. it will not fix the below calculation :

DateTime lastTime = Convert.ToDateTime(dt.Rows[lastRow]["date"].ToString());

Where the value in the DataTable is "19-01-2009 13:45:59", the error is :

1/19/2009 4:34:24 PM System.FormatException: String was not recognized as a valid DateTime.
   at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
   at System.DateTime.Parse(String s, IFormatProvider provider)
   at System.Convert.ToDateTime(String value)
   at Loudnixx_RealTime.RealTimeRadar.ExceedTrackTime()
   at Loudnixx_RealTime.RealTimeRadar.ProcessString(String dat)
   at Loudnixx_RealTime.RealTimeRadar.Listen()

Somehow there has to be a way to set it globally throughout the program.

Can you point me in the right direction ?

kind regards,

Re: CultureInfo and DateTime settings

Arish rivlin19-Jan-09 5:51

Arish rivlin

19-Jan-09 5:51

It looks like a different date format: 1/1/2008 as pose to 1-1-2008 and in any case you can manipulate only on the strings.....

Re: CultureInfo and DateTime settings

Vikram A Punathambekar19-Jan-09 6:31

Vikram A Punathambekar

19-Jan-09 6:31

Is dt.Rows[lastRow]["date"] already a DateTime? If yes, don't convert it into a string again. For converting DateTimes to strings, use DateTime.ToString(formatString).

For parsing strings into DateTimes, use DateTime.ParseExact[^]

Cheers,
Vıkram.

I don't suffer from insanity, I enjoy every moment of it.

Re: CultureInfo and DateTime settings

Rick van Woudenberg19-Jan-09 11:31

Rick van Woudenberg

19-Jan-09 11:31

Thank you all for your reply Smile | :)

DateTime lastTime = DateTime.ParseExact(dt.Rows[lastRow]["date"].ToString(),"dd-MM-yyyy HH:mm:ss", CultureInfo.InvariantCulture);

did the trick Smile | :)

Once again, thank you

kind regards,

Re: CultureInfo and DateTime settings

Vikram A Punathambekar20-Jan-09 4:31

Vikram A Punathambekar

20-Jan-09 4:31

Like I said, if dt.Rows[lastRow]["date"] is already a DateTime, you just have to assign it to lastTime. If it's not, remove the extra ToString().

You are welcome Smile | :)

Also, if you think somebody helped you, please vote them a 5. It's a small pleasure Wink | ;)

Cheers,
Vıkram.

I don't suffer from insanity, I enjoy every moment of it.

Virtual com port

queries36519-Jan-09 2:22

queries365

19-Jan-09 2:22

Hey,
I need to write to a virtual com port......
I'm totally new to this field and do not have any idea what virtual com port is all about?
Can anybody please enlighten me on this ?

Also let me know, in the first place, if it is possible to read/write to a virtual com port ?

Thanking you in anticipation

Regards......

Re: Virtual com port

Bharat Jain19-Jan-09 3:44

Bharat Jain

19-Jan-09 3:44

you need to do device driver for virtual com port , also it is possible to read and write to virtual com port , writing and reading from a virtual com port would be same as reading and writing on a physical com port , but making a virtual com port will take some efforts , you need to learn Device drivers

-Regards
Bharat Jain
bharat.jain.nagpur@gmail.com

Re: Virtual com port

queries36519-Jan-09 4:04

queries365

19-Jan-09 4:04

Bharat Jain wrote:
you need to do device driver for virtual com port , also it is possible to read and write to virtual com port , writing and reading from a virtual com port would be same as reading and writing on a physical com port , but making a virtual com port will take some efforts , you need to learn Device drivers

-Regards
Bharat Jain
bharat.jain.nagpur@gmail.com

Thanks Bharat for a quick reply......

I will definitely go through device drivers......
But in the time being if you can give some more valuable input, then it would be a great help

Kindly suggest what I need to do programatically ?
May be you can tell me the procedure and give some sample C# code if at all possible

Looking forward to your help......

Thank you

Re: Virtual com port

Dan Neely19-Jan-09 4:59

Dan Neely

19-Jan-09 4:59

Drivers are written in C or occasionally C++. Managed code (eg C#) need not apply.

Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall

Re: Virtual com port

queries36519-Jan-09 19:00

queries365

19-Jan-09 19:00

dan neely wrote:
Drivers are written in C or occasionally C++. Managed code (eg C#) need not apply

Does this mean, writing to a virtual com port is not possible in C# ?
Can you please elaborate ?

Re: Virtual com port

Dan Neely20-Jan-09 4:47

Dan Neely

20-Jan-09 4:47

0 YOU CANNOT WRITE DRIVERS IN MANAGED CODE.

1 C# IS MANAGED CODE

2 IF YOU HAVE TO ASK QUESTIONS THIS BASIC YOU'RE NEVER GOING TO BE ABLE TO WRITE A WORKING DRIVER BECAUSE DRIVER BUGS CRASH THE OS AND FORCE A REBOOT EACH TIME SOMETHING GOES BOOM.

Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall

Re: Virtual com port

queries36520-Jan-09 19:21

queries365

20-Jan-09 19:21

dan neely wrote:
0 YOU CANNOT WRITE DRIVERS IN MANAGED CODE.

1 C# IS MANAGED CODE

2 IF YOU HAVE TO ASK QUESTIONS THIS BASIC YOU'RE NEVER GOING TO BE ABLE TO WRITE A WORKING DRIVER BECAUSE DRIVER BUGS CRASH THE OS AND FORCE A REBOOT EACH TIME SOMETHING GOES BOOM.

Hey Dan,
Thanks for the reply......

I just needed to confirm whether the drivers can be written in C# somehow. I never had a question whether C# is managed or not...... Smile | :)

I understand the complications involved in writing drivers, and so I wish you help me through......

Thanks for confirming that writing drivers in C# is not possible......
Can you please guide me in writing device drivers, may be, in C++ ?

Regards......

Re: Virtual com port [modified]

Luc Pattyn19-Jan-09 4:37

Luc Pattyn

19-Jan-09 4:37

queries365 wrote:
I need to write to a virtual com port

why? can you provide more contextual information?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

I use ListBoxes for line-oriented text output (not TextBoxes), and PictureBoxes for pictures (not drawings).

modified on Friday, June 10, 2011 12:13 PM

Re: Virtual com port

queries36519-Jan-09 19:03

queries365

19-Jan-09 19:03

Luc Pattyn wrote:
why? can you provide more contextual information?

Hey Luc,
I have a device connected in the USB port. I want to write data received from it to virtual com port. I want to do this in C#.
Is it possible and if yes can you please guide me through ?

Regards......

Re: Virtual com port [modified]

Luc Pattyn20-Jan-09 1:32

Luc Pattyn

20-Jan-09 1:32

Hi,

you still did not clarify the situation. What is on the other side of the virtual port? Why do
you (think you) need a virtual port? Which virtual port are you referring to (i.e. who wrote
that driver, or how is it called)?

Anyway using a virtual COM port is identical to using a real serial port.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Good riddance W

modified on Friday, June 10, 2011 12:13 PM

Re: Virtual com port

queries36520-Jan-09 4:08

queries365

20-Jan-09 4:08

Hey,
I am a novice in this field. So I've no clue about virtual com port and the technicalities associated with it.

I have 2 questions that don't need any contextual information I suppose:

1. Can a virtual com port be created in C# ? If yes, how is it done ? And if no, then what is the alternate way to do it ?

2. If I have a virtual com port and all I need to do is write to it, then in that case is it possible to write to it using C#? How is it done ?

Please help me on this......

Regards......

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