Re: C# events list problem - C# Discussion Boards

tmp028-Jul-05 22:06

28-Jul-05 22:06

Hello all,

I’m trying to develop a simple/personal firewall using C#. I used Jesus O’s class for setting the rules and it is working smoothly. However, I’m trying to search for a way to make the application ask the user if a certain program is trying to access the internet, showing the port, address, direction…etc (just like the popup dialog in ZoneAlarm). I’m not even sure if this is the right place to ask, but any hint on how to do it, implement it, the algorithm for it or the API would be highly appreciated.

Many thanks in advance,
tmp0

Readout Summary-Information

Fitud28-Jul-05 21:30

Fitud

28-Jul-05 21:30

I want to make a programm for checking commentinformation (like summary, param, remarks ans so on) with the real code.
My Problem is who can i read out this information?
In Visual-Studio i can see this in object-explorer an by autointilsence. But who can i get it.
Can anybody help me?

Re: Readout Summary-Information

leppie28-Jul-05 23:18

leppie

28-Jul-05 23:18

Just read the XML doc file.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

Re: Readout Summary-Information

Fitud29-Jul-05 1:49

Fitud

29-Jul-05 1:49

Okay, but who can i do this.
I Want read out the information about class,properties, methods an so on with reflection.
But i see no way to bring together the both information parts.

using Microsoft Project 2000 with C#

ismaill28-Jul-05 21:28

ismaill

28-Jul-05 21:28

Good morning,
I would like to use Microsoft projct 2000 with C#. I have already added the necessary references but I don't know what to include as namespaces to open a *.mpp file or access to saved data.
Some code lignes would be helpfull for me.
Thanks for help.

C# events list problem

Sheel Gohe28-Jul-05 21:27

Sheel Gohe

28-Jul-05 21:27

My problem is, i have migrated from VB.net to C# recently. In vb.net, in the code window's left combo box we get the list of controls and in the right combobox we get the list of events associated with the selected control in the left combobox. And when we select an event from the combobox list vb.net writes the declaration for that event. But in C# i am finding difficulty in writing events by my own. I know how can we add events in C#, like, we have to go to windows designer code and write a new eventhandler like : this.button1.KeyDown += new System.EventHandler(this.button1_KeyDown);

and then i have to go to my forms code window (i m using .net 2005) and write a method there with name "button1_Keydown". But my problem is i dont know what arguments i have to pass in this method. In vb.net the designer itself write the method with arguments for me so i dont have to worry about what are the event's arguments.

Please help me how can i get the list of events with its arguments associated with a controls.

Thansks in advance Smile | :)

.

sheel

Re: C# events list problem

lmoelleb28-Jul-05 21:59

lmoelleb

28-Jul-05 21:59

In the designer select the control you want an event for. In the property grid switch to "events" and double click the event you want to implement.

Re: C# events list problem

Sheel Gohe29-Jul-05 0:36

Sheel Gohe

29-Jul-05 0:36

Many thanks to you my friend. You solved my big problem.
Happy Coding Big Grin | :-D

Sheel

sheel

Re: C# events list problem

malharone29-Jul-05 9:01

malharone

29-Jul-05 9:01

Though personally i think this approach is perfect (and i admit using it often)... but I'd hate to rely on the UI designer for the control events and such. Most of the times, for the sake of clealiness, I myself associate the events manually. And the C# IDE has a great intellisense for events. As soon as you type "MyControl.Event+=" .. simply press "Tab" twice and it'll do the job.

- Malhar

Sharing a class between 2 forms??

Dewclaws28-Jul-05 20:38

Dewclaws

28-Jul-05 20:38

I am just starting out in C# and find my self stuck on a problem that looks to me to be a permission problem within my application. Any suggesions on where I should create the instance so both forms can access it?

I am tring to have a single instance of a class be accessable within multible forms.

Dumb version of what Im doing

NameSpace – App
{
Class Testing class
{ create an array of int's}

Form1
{
- Create instance of Testing class
}
Form2
{
- Access class created in Form1 !! ERRROR, I not see the instance..
}
}

Re: Sharing a class between 2 forms??

Member 197359428-Jul-05 21:10

Member 1973594

28-Jul-05 21:10

Hi,

Implement your class as a Singleton?

So....

==================

using System;

namespace MyApp
{
public class MyClass
{
private static MyClass myClass;

//Make the constructor private instead of public.
private MyClass(){}

//Call this method to return the same instance to all.
public static MyClass GetInstance()
{
if (myClass == null)
{
myClass = new MyClass();
}
return myClass;
}
}
}

==================

Timer for scheduling

ppp00128-Jul-05 18:57

ppp001

28-Jul-05 18:57

Hi,

How can I write a timer function in C#, so that the timer
can register the datetime (but not the interval) of the event ?

And if my timer program sleep as the PC sleep while the user away,
how can I alert the timer to re-check the scheduled event to see if
there are any events that is over-due ? (i.e. is there are any
event handling for watching the PC system awaking from sleep ?)

Thanks

Re: Timer for scheduling

Christian Graus28-Jul-05 19:01

Christian Graus

28-Jul-05 19:01

ChristmasTree wrote:
How can I write a timer function in C#, so that the timer
can register the datetime (but not the interval) of the event ?

You can't. The best you can do is to write a frequent timer that checks the date/time to see if it has passed.

ChristmasTree wrote:
And if my timer program sleep as the PC sleep while the user away,
how can I alert the timer to re-check the scheduled event to see if
there are any events that is over-due ? (i.e. is there are any
event handling for watching the PC system awaking from sleep ?)

Same as above - check the time regularly, and if it has passed, then act. It won't matter then if it's passed by 1/2 second, or by 20 years.

<edit>
Of course, Windows HAS a scheduler, I don't know much about it, but I presume you can schedule your own task there, but I take it to mean you want to do something entirely in code within your existing program.
</edit>

Christian Graus - Microsoft MVP - C++

Technical help

comingsoon28-Jul-05 16:59

comingsoon

28-Jul-05 16:59

Why c# programs don't run on PCs where there's no a setuped visual studio ????
i tried to run a c# executable file on a pc where there was no setuped visual studio, and i was surprised when the error message appeared.

Don't Smile To The World...It Does Not Smile To You

Re: Technical help

Christian Graus28-Jul-05 17:38

Christian Graus

28-Jul-05 17:38

comingsoon wrote:
Why c# programs don't run on PCs where there's no a setuped visual studio ????
i tried to run a c# executable file on a pc where there was no setuped visual studio, and i was surprised when the error message appeared.

I'm astounded how many people use the .NET framework and have absolutely no idea how it works.

C# and VB.NET programs compile to an intermediate language called MSIL. The .NET framework installer runs as part of the VS install, obviously. Anyone who wants to run your C# executable needs to also have the .NET framework installed. If you don't want that requirement, use C++.

Christian Graus - Microsoft MVP - C++

Re: Technical help

comingsoon28-Jul-05 17:50

comingsoon

28-Jul-05 17:50

Is there any other solution 4 that prob ?
where can i find the .NET framework ???
Thanks for reply, Christian

Good is Good

Re: Technical help

Christian Graus28-Jul-05 18:01

Christian Graus

28-Jul-05 18:01

comingsoon wrote:
Is there any other solution 4 that prob ?

No, your options are C++ and the .NET framework. If there was any other option, why would anyone download the framework to start with ?

comingsoon wrote:
where can i find the .NET framework ???

Choose[^] any of the hits I got from google, I'm sure at least the first four will give you a download link.

Christian Graus - Microsoft MVP - C++

Re: Technical help

Dave Kreskowiak29-Jul-05 4:26

Dave Kreskowiak

29-Jul-05 4:26

Isn't it also astounding how many people don't know how to use the Internet, or more specifically, a search engine?

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

Re: Technical help

Christian Graus31-Jul-05 13:18

Christian Graus

31-Jul-05 13:18

Yeah, that's also a good point.

Christian Graus - Microsoft MVP - C++

Re: Technical help

leppie28-Jul-05 23:28

leppie

28-Jul-05 23:28

Christian Graus wrote:
I'm astounded how many people use the .NET framework and have absolutely no idea how it works.

I agree, it's shocking! I wonder how people even manage to write code not knowing the basics.

^{xacc-ide 0.0.15 now with C#, MSIL, C, XML, ASP.NET, Nemerle, MyXaml and HLSL coloring - Screenshots}

synchronized arrayList in C#

ppp00128-Jul-05 15:51

ppp001

28-Jul-05 15:51

Hi,

what is the most proper right to create a synchronized arrayList
that can allow different threads to access it ?

Thanks

Re: synchronized arrayList in C#

Lars Niedziolka28-Jul-05 16:18

Lars Niedziolka

28-Jul-05 16:18

Hi Swakswi,

Use

ArrayList mySyncArrayList = ArrayList.Synchronized(myArrayList);

See
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemcollectionsarraylistclasssynchronizedtopic.asp

XmlTextReader - reading from a string?

andrewpritchie28-Jul-05 14:18

andrewpritchie

28-Jul-05 14:18

All,

Just wondering if it is possible to parse XML from a string in memory, as opposed to a file? I'm getting XML data over a TCP/IP connection, and it is read into a string in memory. I could dump the string to a file, then parse the filename to XmlTextReader, but that seems like a waste of resources.

Any pointers would be appreciated.

Cheers,
Andrew

Re: XmlTextReader - reading from a string?

Lars Niedziolka28-Jul-05 15:24

Lars Niedziolka

28-Jul-05 15:24

Hi Andrew,

there are some solutions:

1st)
If you only want an XmlDocument, use the methode LoadXml of the XmlDocument class.

<br />
string myXmlContent = @"<GoodSides><Side name='CodeProject'>http://www.codeproject.com</Side></GoodSides>";<br />
XmlDocument xmlDoc = new XmlDocument();<br />
xmlDoc.LoadXml(myXmlContent);<br />

2nd)
Copy the bytes (or strings) to a MemoryStream.

<br />
byte[] myContent = ...;<br />
MemoryStream memStream = new MemoryStream(myContent);<br />
XmlTextReader xmlReader = new XmlTextReader(memStream);<br />

<br />
MemoryStream memStream = new MemoryStream();<br />
StreamWriter memWriter = new StreamWriter(memStream);<br />
memWriter.Write(@"<GoodSides>");<br />
memWriter.Write(@"<Side name='CodeProject'>http://www.codeproject.com</Side>");<br />
memWriter.Write(@"</GoodSides>");<br />
memStream.Position = 0; // Reset the position<br />
XmlTextReader xmlReader = new XmlTextReader(memStream);<br />

3rd)
Implement a own class with Stream as BaseClass.
This class can read the datas direct from TCP/IP.

<br />
class MyOwnStream: Stream<br />
{<br />
  // especialy<br />
  int Read(byte[] buffer, int offset, int count)<br />
  {<br />
    ...<br />
  }<br />
};<br />
MyOwnStream myStream = new MyOwnStream(...);<br />
XmlTextReader xmlReader = new XmlTextReader(myStream);<br />

4th)
Use the SocketStream direct. (If the stream contains only the xml data and no more.)

<br />
NetworkStream myNetworkStream = new NetworkStream(mySocket);<br />
XmlTextReader xmlReader = new XmlTextReader(myStream);<br />

Hope, it helps
Niedzi

How can I...

KORCARI28-Jul-05 12:23

KORCARI

28-Jul-05 12:23

how can I get message I want in a textbox after checking a chekbox?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.