|
Hey All...
So I was working through a directX tutorial and i came across this:
<br />
try <br />
{<br />
state = this.keyboard.GetCurrentKeyboardState();<br />
<br />
break;<br />
}<br />
catch (Microsoft.DirectX.DirectInput.InputException)<br />
{ <br />
Application.DoEvents();<br />
<br />
try<br />
{ <br />
keyboard.Acquire(); <br />
}<br />
catch (Microsoft.DirectX.DirectInput.InputLostException)<br />
{ <br />
continue; <br />
}<br />
catch(Microsoft.DirectX.DirectInput.OtherApplicationHasPriorityException)<br />
{ <br />
continue; <br />
}<br />
}<br />
}<br />
<br />
<br />
However, the compiler says that all exceptions have to be derived from System.Exception. What can I do?
Thanks a lot,
Jim
Did I post well? Rate it! Did I post badly? Rate that too!
|
|
|
|
|
|
Apologies for what will proove to be a vague title.
I have a C# windows service that performs client SNTP sync calls. Depending on the configuration this polling can occur on any frequency. This all works well and I am more than happy with it.
I have been asked to add some additional functionality, which has me stumped. I need the service to perform a poll when another application needs it to happen.
For example, the client PC is running the sync service with a 2 hour frequency, the last poll was 30 minutes ago. The client is running another application that will run "some code" that will force the sync service to perform a sync. This application could be written in any of the major languages out there.
I am under the impression that, under Windows, it is possible to raise a system event, that can be caught in the service, from there I would launch a sync request.
Does anybody have any suggestions on how I could go about this?
|
|
|
|
|
So you want client applications to trigger some operation on the service? Remoting is one option. And if you are talking about kernel level events, yes they are available under the System.Threading namespace. Look for AutoResetEvent and ManualResetEvent.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
|
|
|
|
|
I know just how to set a form transparent and make an irregular shape form but what i need is add a shadow to the image i use as my own shape.
so i've tried to draw it together the shape image and save it as png to get trasparent background and semitrasparent color for the shadow.
The problem is a form background or a panel or picturebox doens't support semitransparent image or trasparent image if i don't set a defined color as that to avoid to draw.
How can i load an image with more semi transparent color and set it as the shape form image?
|
|
|
|
|
Hi
I'm trying to write a simple client/server program in c# were the server only needs to deal with one client at a time.
I wanted to create a new thread to listen for and proccess incoming clients (on the server side).
The thread would look somthing like:
private void serverThread()
{
while(true)
{
tcpClient = tcpListener.AcceptTcpClient();
//create streams and other stuff...
do
{
//get data from the client(read from a stream)
}
while(dataReceived!= clientWantsToDisconnect)
//disconnect and be ready for a new connection
}
}
That is, theres a never ending loop that waits for clients and an inner loop that gets data from them.
If the client sends data indicating he wants to end the connection, theres no problem.
But if the client just disconnects (some kind of an error on the client side or a connection problem), how would i know of it ?
The server would just wait on the line that reads from the stream forever.
How can i know the moment the client is disconnected ?
What i'm looking for is some exception/event that would tell me the connection was severed.
I remember the winsock control in vb6 had events for anything that happend with the connection (I'm trying to write a class that will be similer to that using delegates)
It also had an event that was raised the second it was disconnected, how can i achieve that ?
Thanks for bearing with me...
Ronen.
|
|
|
|
|
When the client disconnects, the call to get data from the client will return with 0 bytes of data. The problem is that, even during normal data transfer, the 0 bytes condition might occur. So what I did was, if I got zero bytes of data, I'd send a "ping" like command, which the client must respond to. If the client got disconnected, sending the "ping" will fail and you'll know the client has disconnected for sure.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
|
|
|
|
|
In IIS, to seperate our web app from other, we can create application pools for them.
I don't know how can I use C# to get the identity of those application pools?
Thanks,
Tommy.
|
|
|
|
|
Hello gurus,
I would like to know if there is a method somewhere to convert a long filename in a short filename as 8.3 format?
Thanks for the help.
Best regards.
There is no spoon.
|
|
|
|
|
Well, this search[^] shows that you need to call GetShortPathName. Then, this search[^] provides you with the answer you need!
John
"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.
|
|
|
|
|
is there a .NET way for this?
I mean without calling Win32 API...
Thanks.
There is no spoon.
|
|
|
|
|
Do you really need a non-Win32 API way to do this? On what systems do you need to translate from long to short forms? If it's only on Windows systems, then the best choice is to use the Windows API to do it right.
John
"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.
|
|
|
|
|
right, it's for windows, but if I decided to use .NET it's to get off Win32... If I start to use Win32 APIs in a .NET application, well, it's useless to continue in .NET...
of course I can use the Win32 API, but I would prefere a .NET way. That's why I started a new thread...
best regards.
There is no spoon.
|
|
|
|
|
Technically, that IS a .NET way. That's the whole point of the Platform Invoke feature of .NET. But, you're in charge of your app, so you get to decide!
John
"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.
|
|
|
|
|
ok, so I'll use the win32 api 
There is no spoon.
|
|
|
|
|
:->
John
"You said a whole sentence with no words in it, and I understood you!" -- my wife as she cries about slowly becoming a geek.
|
|
|
|
|
Try the old ~1
Like: longfi~1.wtf
for the file longfile.wtf
The PROgrammer Niklas Ulvinge aka IDK
|
|
|
|
|
Hi, I have this database that contains 3 tables, and I want to bind its contents to textboxes. I'm able to bind them correctly (I see the values in the TextBoxes) but I can't update them when I select another row of a given table. I'll explain what I do.
I have a Next and a Previous button. When I push the Next, I do the following:
BindingManagerBase bm = BindingContext[networkDataSet.Tables["TableOne"]];
if(bm != null && bm.Position < bm.Count -1)
bm.Position++;
CurrencyManager cm = bm as CurrencyManager;
if(cm != null)
cm.Refresh();
The code executes, the Position increments, but doesn't update the TextBoxes with the values contained in the next Rows...
What do I do wrong?
Thanks!!!
|
|
|
|
|
hi there, is there any way I could serialize a queue collection?
Also another question, how can I cast an object array to a string array? .. thanks in advance
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
Isn't this working ? string[] mine = (string[])myArray;
|
|
|
|
|
unfortunately it doesn't, I want to cast an object array returned by ToArray() (of a queue object) to a string array...
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
Waleed wrote:
is there any way I could serialize a queue collection?
The Queue class is marked serializable, so all you should need is for the objects being managed by the queue to be serializable as well.
Waleed wrote:
how can I cast an object array to a string array?
Something like this:
ArrayList foo=new ArrayList();
object[] foobar=new object[] {"a", "b", "c"};
foo.AddRange(foobar);
string[] foostr=(string[])foo.ToArray(typeof(string));
Marc
My website
Latest Articles:
Undo/Redo Buffer
Memento Design Pattern
|
|
|
|
|
the problem is that the ToArray method of the Queue class doesn't take any arguments! and the cast doesn't work, I get System.InvalidCastException "Specified cast is not valid"
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
Waleed wrote:
the problem is that the ToArray method of the Queue class doesn't take any arguments! and the cast doesn't work, I get System.InvalidCastException "Specified cast is not valid"
Right, since it's returning a object[].
So, try (edited!):
ArrayList foo=new ArrayList();
foo.AddRange(queue.ToArray());
string[] foostr=(string[])foo.ToArray(typeof(string));
(I forgot the cast in my previous example). The cast here is correct (assuming everything in the queue is a string).
Marc
My website
Latest Articles:
Undo/Redo Buffer
Memento Design Pattern
|
|
|
|
|
Has anybody seen this exception before?
"You must implement a default accessor on system.collections.queue because it inherits from ICollection."
I got this exception while trying to XMLSerialze a Queue object, which is the inner exception message of the caught exception.
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
