Changing default format for DateTime.ToString() - C# Discussion Boards

ItemCommand triggering off of a dropdownlist

22-Nov-05 15:10

Write a class derived from Listbox. It doesn't do that otherwise.

Christian Graus - Microsoft MVP - C++

Resizing window

picasso222-Nov-05 13:39

picasso2

22-Nov-05 13:39

Created a default form. How can I prevent from user clicking and dragging one of the corners to resize the form?

Re: Resizing window

Curtis Schlak.22-Nov-05 14:58

Curtis Schlak.

22-Nov-05 14:58

Easiest way: set the FormBorderStyle property of the form to FormBorderStyle.Fixed3D.

"we must lose precision to make significant statements about complex systems."
-deKorvin on uncertainty

Baatezu22-Nov-05 13:36

Baatezu

22-Nov-05 13:36

From another forum I've read that it isn't possible to get a Repeater control to trigger the ItemCommand event when a dropdownlist selection is changed or a checkbox check is changed.
I'm apt to believe the other forum, since it is generally true and helpful, and my own experiences bear this out.
I would like use a repeater control because it simplifies and reduces the coding I need to do to generate the list of items.
Is it possible to get events from a dropdownlist or check box that are within a repeater control?

The wisest of the wise may err. - Aeschylus

EventLog

Guinness4Strength22-Nov-05 12:15

Guinness4Strength

22-Nov-05 12:15

I'm having a hell of a time using the EventLog class within a windows Service.
The service runs fine...no errors but does not write to my custom event log.
The service is running with LocalSystem Account privilages and I'm logged on as an admin.
Here is the code I am using:

public const string EventLogSource="BLOBUpdateService";
public const string EventLogName="BLOBUpdateEventLog";
..
..
..
..

//init Event Log
m_Log = new EventLog();
if(!EventLog.SourceExists(EventLogSource))
	EventLog.CreateEventSource(EventLogSource,EventLogName);
m_Log.Source=EventLogSource;
m_Log.WriteEntry("Service Started...",EventLogEntryType.Information);

Nothing is getting written to the log.
Any thoughts ?

Re: EventLog

Guinness4Strength23-Nov-05 4:15

Guinness4Strength

23-Nov-05 4:15

I solved my problem.
I started to use the static EventLog.WriteEvent method rather than using an instance of the class.

Changing default format for DateTime.ToString()

Dan Neely22-Nov-05 10:51

Dan Neely

22-Nov-05 10:51

Is there any way I can globally change DateTime.ToString() to use a 24hr clock instead of am/pm? From initial googling it appears that this is controlled by culture settings, but I'm not having any luck finding specifics.

If not I could do a global search/replace and feed a format string into each call, but that would leave any new additions open to a bug if I overlooked making the change there.

Re: Changing default format for DateTime.ToString()

Joshua Quick22-Nov-05 11:39

Joshua Quick

22-Nov-05 11:39

Do you mean change it globally on your PC? To do that you would:
1) Open Window's Control Panel.
2) Click on "Regional and Language Options".
3) Click the Customize button in the Regional Tab.
4) Select the Time tab.
5) Enter/select the following Time format: "HH:mm:ss"

Re: Changing default format for DateTime.ToString()

Dan Neely22-Nov-05 11:49

Dan Neely

22-Nov-05 11:49

No, just for my application.

Re: Changing default format for DateTime.ToString()

Joshua Quick22-Nov-05 12:19

Joshua Quick

22-Nov-05 12:19

Try this...

System.Globalization.CultureInfo info;<br />
info = System.Globalization.CultureInfo.CurrentCulture;<br />
info = new System.Globalization.CultureInfo(info.LCID, true);<br />
info.DateTimeFormat.ShortTimePattern = "HH:mm:ss";<br />
info.DateTimeFormat.LongTimePattern = "HH:mm:ss";<br />
System.Threading.Thread.CurrentThread.CurrentCulture = info;

Re: Changing default format for DateTime.ToString()

Dan Neely23-Nov-05 2:28

Dan Neely

23-Nov-05 2:28

Thank you for pointing me in the right direction, the one I actually needed to change was FullDateTimePattern.

strings

Sam 200622-Nov-05 10:34

Sam 2006

22-Nov-05 10:34

hello, i have a listbox with some items in it, in this form:

client #1 - 255.255.255.255:8000

where the ip, port, and client number changes length (number of digits). how can i convert the client # in this to an int (stored in a variable), but not get anything else in it? (using clients.SelectedValue)

thanks in advance,
sam kline

Christian Graus22-Nov-05 11:16

22-Nov-05 11:16

You can use string mashing, or you could use a regular expression

client #(\d*)

seems to me like it would capture the number for you

Christian Graus - Microsoft MVP - C++

Sam 200622-Nov-05 12:27

Sam 2006

22-Nov-05 12:27

how exactly would i do that? everything i try gives me exceptions.

thanks in advance,
sam kline

Christian Graus22-Nov-05 12:39

22-Nov-05 12:39

What did you try ?

string s = "client #1 - 255.255.255.255:8000";
Match match = Regex.Match(s, @"client #(\d*)", RegexOptions.IgnoreCase);
MessageBox.Show(match.Groups[1].Value);

This shows '1' in a message box.

Christian Graus - Microsoft MVP - C++

Best way to go fullscreen?

Sam 200622-Nov-05 12:45

Sam 2006

22-Nov-05 12:45

thanks a lot! it worked.

try
{
Match match = Regex.Match(connectedusers.SelectedItem.ToString(), @"client #(\d*)", RegexOptions.IgnoreCase);
return Convert.ToInt32(match.Groups[1].Value);
}
catch (FormatException)
{
return 0;
}
catch (NullReferenceException)
{
return 0;
}

MKlucher22-Nov-05 9:12

MKlucher

22-Nov-05 9:12

I want to use GDI to draw some images in a "fullscreen" mode. What is the best way to do this? When I seem to hide pieces of my form turn it black and make it the resolution of the monitor there seems to be a "pause" when covering up the start menu. This makes me think I'm not approaching it the right way. Anyone know the proper way to do this?

Re: Best way to go fullscreen?

Christian Graus22-Nov-05 11:17

Re: Best way to go fullscreen?

22-Nov-05 11:17

Just resize your window so that the non client areas are outside the bounds of the screen.

Christian Graus - Microsoft MVP - C++

Stanciu Vlad22-Nov-05 21:43

Stanciu Vlad

22-Nov-05 21:43

I order to switch to a "fullscreen" mode you must set the Window class's

dwExStyle=WS_EX_APPWINDOW;
dwStyle=WS_POPUP;

And force the window to fill the entire screen.

I think the changes to the window class I mentioned above can be achived if you set the border property of a window to none. And, if you have problems with the TaskBar, set the TopMost property to true Wink | ;)

I hope you understand...because is a rough world out there...

Generic Collection class question

smh122-Nov-05 7:11

smh1

22-Nov-05 7:11

How would you program a generic collection class to allow only classes inherited from, say Person, class. Here is the code article by Mahesh Kumar on this subject. He codes this for any type, but suppose in his sample, employee and customer are of a particular type, say, "Worker" how would this code be changed.

smh1

Kevin McFarlane22-Nov-05 9:28

Kevin McFarlane

22-Nov-05 9:28

Not used VS 2005 yet but from a little bit of reading around the subject I'd guess that you would use generic constraints for this type of problem.

Not sure of the syntax from memory but something like

Collection<Employee> where Employee : Worker

i.e., Employee has to inherit from Worker or implement an interface called Worker (IWorker for .NET of course).

Kevin

Christian Graus22-Nov-05 11:48

22-Nov-05 11:48

In VS2005, you'd do this

ArrayList<Worker> list = new ArrayList<Worker>;

Christian Graus - Microsoft MVP - C++

akyriako7822-Nov-05 12:30

akyriako78

22-Nov-05 12:30

There is no generic ArrayList in VS2005.The generic equivelant of the Arraylist is List<T>.So you could write

List<Worker> list = new List<Worker>();

-- modified at 18:31 Tuesday 22nd November, 2005

Christian Graus22-Nov-05 12:39