Re: Creating system of separation access rights - C# Discussion Boards

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Re: Switch versus an array of delegates

DaveyM6911-Mar-10 7:56

DaveyM69

11-Mar-10 7:56

Luc Pattyn wrote:
I'm not inclined to show the ugly beasts I sometimes create!

That's gotta be worth a 5!

I'm creating a bit of a 'beast' at the moment - I hope I have some time to refactor it before anyone reviews the code! Unlikely as it's going live tomorrow (if I can complete this evening) and so long as it works then no one will be interested D'Oh! | :doh:

Dave

Binging is like googling, it just feels dirtier. (Pete O'Hanlon)

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Switch versus an array of delegates

PIEBALDconsult11-Mar-10 8:03

PIEBALDconsult

11-Mar-10 8:03

DaveyM69 wrote:
refactor it before anyone reviews the code

Right, that's basically what I'm doing -- revisiting my code before I publish it. I find this to be a good exercise.

Re: Switch versus an array of delegates

Dave Kreskowiak11-Mar-10 9:11

Dave Kreskowiak

11-Mar-10 9:11

Luc Pattyn wrote:
goes against all normal coding guidelines; I'm not inclined to show the ugly beasts I sometimes create!

Chicken sh!^. Laugh | :laugh:

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: Switch versus an array of delegates

dybs11-Mar-10 17:28

dybs

11-Mar-10 17:28

Luc Pattyn wrote:
4. Coding for performance, when taken to the extreme, goes against all normal coding guidelines

I would actually be interested to see what conditions are "acceptable" for breaking normal rules and different methods for acheiving said perfomance. Is that a bad thing? Wink | ;)

Dybs

The shout of progress is not "Eureka!" it's "Strange... that's not what i expected". - peterchen

Re: Switch versus an array of delegates

Luc Pattyn11-Mar-10 17:38

Luc Pattyn

11-Mar-10 17:38

There is nothing wrong as long as you are fully aware of the consequences. The first thing you probably loose is good readability and hence easy debugging and maintainability.

When in search of maximum performance, quite often object orientation is bad when the objects are very small and very many (too much overhead). Method calls are bad (they don't compute anything), conditionals are bad (they disturb normal program flow). Combine that and you may end up with large pieces of straight, hardly structured, code; and then there is a whole collection of hacks to choose from.

Whether all this is acceptable is matter of discussion.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Re: Switch versus an array of delegates

PIEBALDconsult11-Mar-10 6:41

PIEBALDconsult

11-Mar-10 6:41

Luc Pattyn wrote:
CPU simulators

Yeah, this is kinda that -- a script language interpreter.

Creating system of separation access rights

Xgener11-Mar-10 5:26

Xgener

11-Mar-10 5:26

I need to make client-server project with separated access. It should be 3 groups of users with different access level. Access level defines the appearance of form witch user would see. Can somebody advise how to realize this separated access.

Re: Creating system of separation access rights

Saksida Bojan11-Mar-10 5:56

Saksida Bojan

11-Mar-10 5:56

I would do it like this: (As long as I presume, that client doesn't access Database directly)

1. step: Client logs in with authentic username and password
2. step: Server sends to client current access level and the server holds its data per session. (Doesn't clean memory, till logout or Time out)
3. step: Client gets access level and then prepares GUI.

When client sends command, witch exceeds user privileges wont get them info. This design prevents users modifying client, to get higher access. This works as long you do not connect directly to database only to service that sits on Server side between client and database.

and bad design: If you want to directly connect to database (Witch I do not recommend) use for each privileges, use own build client for each access level.
C++ have compiler directive: (I do not know if exists in C#)
#define, #ifdef, #ifndef and #endif.

Outlook - with Hotmail account

chiky_ancutza11-Mar-10 5:21

chiky_ancutza

11-Mar-10 5:21

Hi,

1. I configured the Outlook to work with Windows Live Hotmail(my hotmail account)
2. Now i want to read all the inbox from my hotmail account using C#.
3. The outlook create for hotmail a file with .ost extension(not with .pst)
4. My procedure is like this:
TextWriter tw = new StreamWriter(@"C:\pstfile_html.txt");
// Create the Outlook application.
// in-line initialization
Outlook.Application oApp = new Outlook.Application();

// Get the MAPI namespace.
Outlook.NameSpace oNS = oApp.GetNamespace("MAPI");

// Log on by using the default profile or existing session (no dialog box).
oNS.Logon(Missing.Value,Missing.Value,false,true);

//Get the Inbox folder.
Outlook.MAPIFolder oInbox = oNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);

//Get the Items collection in the Inbox folder.
Outlook.Items oItems = oInbox.Items;

Outlook.MailItem oMsg = (Outlook.MailItem)oItems.GetFirst();

for (int i = 0; i < oItems.Count; i++)
{

//Output some common properties.
tw.WriteLine(oMsg.Subject);
tw.WriteLine(oMsg.SenderName);
tw.WriteLine(oMsg.ReceivedTime);
tw.WriteLine(oMsg.Body);
tw.WriteLine(oMsg.HTMLBody);
tw.WriteLine("Next Message-----------------------");
oMsg = (Outlook.MailItem)oItems.GetNext();

//System.Diagnostics.Debug.WriteLine(objMail.Body.ToString());

}

//Log off.
oNS.Logoff();

//Explicitly release objects.
oMsg = null;
oItems = null;
oInbox = null;
oNS = null;
oApp = null;
tw.Close();
}

//Error handler.
catch (Exception e)
{
Console.WriteLine("{0} Exception caught: ", e);
}

// Return value.
return 0;

}
6. I don't know how to take hotmail folder.

Thanks,
Anca

GameServer Query A2S_PLAYER Problem

Nokia555611-Mar-10 5:21

Nokia5556

11-Mar-10 5:21

Hello,

I can't get the challenge and player respond working, it currently responds no player time, score only name, But the names are to little strange.

public string Challenge(string servIP, int servPORT)
            {
                byte[] buffer = new byte[100 * 1024];
                byte[] PlayerQuery = { 0xff, 0xff, 0xff, 0xff, 0x55, 0x65 };

                Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

                IPEndPoint ipEP = new IPEndPoint(IPAddress.Parse(servIP), servPORT);

                EndPoint EP = (EndPoint)ipEP;

                socket.ReceiveTimeout = 1000;

                socket.SendTo(PlayerQuery, PlayerQuery.Length, SocketFlags.None, EP);

                int recvBytes = socket.ReceiveFrom(buffer, ref EP);
                return ParseChallenge(buffer);
            }

            private string ParseChallenge(byte[] resp)
            {
                _CHALLANGE = System.Text.Encoding.ASCII.GetString(resp, 5, 4);
                return _CHALLANGE;
            }

            private SourceQuery ParsePlayers(byte[] resp)
            {
                SourceQuery ret = new SourceQuery();
                int i = 0;
                ret.PPlayers = Encoding.ASCII.GetString(resp);
                /*while (pNr < numPlayers - 2 && offset < resp.Length)
                {
                    offset += 1;
                    string plname = GetString(resp, offset, resp.Length);
                    offset += ret._players[pNr].Name.Length;
                    int plscore = BitConverter.ToInt32(resp, offset);
                    offset += 4;
                    pNr = ret._players.Add(new Player(plname, plscore));
                }*/
                return ret;
            }

            public SourceQuery Players(string servIP, int servPORT)
            {
                byte[] buffer = new byte[4096];
                string challenge = Challenge(servIP, servPORT);
                byte[] PlayerQuery = { 0xff, 0xff, 0xff, 0xff, 0x55 };
                string pQuery = Encoding.ASCII.GetString(PlayerQuery);
                byte[] Query = Encoding.ASCII.GetBytes(pQuery + challenge);

                Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

                IPEndPoint ipEP = new IPEndPoint(IPAddress.Parse(servIP), servPORT);

                EndPoint EP = (EndPoint)ipEP;

                socket.ReceiveTimeout = 1500;

                socket.SendTo(PlayerQuery, PlayerQuery.Length, SocketFlags.None, EP);

                int recvBytes = socket.ReceiveFrom(buffer, ref EP);
                return ParsePlayers(buffer);
            }

Rotate an rectangle while moving the mouse... and watch it rotating

nwl11-Mar-10 3:01

nwl

11-Mar-10 3:01

Hi,

i've got a Graphics Object and have drawn a rectangle (graphics.DrawRectangle) on it. Now I want to rotate it using the mouse. and the rotation matrix. But I don't see the rotation while moving the mouse, I just see it after realeasing the button...

Can anybody help me?

Re: Rotate an rectangle while moving the mouse... and watch it rotating

OriginalGriff11-Mar-10 3:52

OriginalGriff

11-Mar-10 3:52

Without seeing any code it is difficult to tell you much - but are you calling Invalidate in the MouseMove Event?

You should never use standby on an elephant. It always crashes when you lift the ears. - Mark Wallace

C/C++ (I dont see a huge difference between them, and the 'benefits' of C++ are questionable, who needs inheritance when you have copy and paste) - fat_boy

Re: Rotate an rectangle while moving the mouse... and watch it rotating

dan!sh 11-Mar-10 4:28

dan!sh

11-Mar-10 4:28

It would be quite difficult to tell without seeing your code.

Still, are you changing the coordinates in the correct MouseMove event?

Re: Rotate an rectangle while moving the mouse... and watch it rotating

Luc Pattyn11-Mar-10 5:18

Luc Pattyn

11-Mar-10 5:18

As you haven't shown any code, all I can do is say the principles are explained everywhere, including here[^].

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

Djtech0111-Mar-10 2:49

Djtech01

11-Mar-10 2:49

I'm tryin to make a modified microprocessor programming language compiler in .NET but in my code generator part I face one big problem. It's the fact that microsoft intermediate language only supports stack based execuition which will indeed make me to think for other way. I want register based execuition since i'm planning for 8086 architecture. can anybody help me figure out how to handle this problem.

Re: hi

Not Active11-Mar-10 3:28

Not Active

11-Mar-10 3:28

Read How to get an answer to your question[^]

"Hi" is not a very useful subject and will get your question ignored not answered

I know the language. I've read a book. - _Madmatt

Re: hi

Luc Pattyn11-Mar-10 3:50

Luc Pattyn

11-Mar-10 3:50

Whatever application you develop in C#, .NET using an intermediate language (IL), and IL being stack oriented, is irrelevant. A compiler written in C# isn't any different from a compiler in any other language (unless you want to compile some language to IL of course).

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that.

detail explaination to my question.

Djtech0114-Mar-10 22:18

Djtech01

14-Mar-10 22:18

thanks!
as you can see in the code MSIL has opcode which are execuited by other functions which are not shown here. after these opcodes are execuited they are retured by the 4th line of the code and after that the code will create an assembly based on the compiler result for the code written by the user.this assembly is then saved and finally run so that the user can see his code runing.

now what i want to ask is that this MSIL execuite its codes on stack based approach. but my interest is to create a compiler for 8086 microprocessor architecture which in my opinion needs register based execuition so that I can access the individual register values.

public CodeGene(AST.Stmt stmt, string moduleName)
{

this.il = methb.GetILGenerator();
this.symbolTable = new Collections.Dictionary<string, Emit.LocalBuilder>();
this.GenStmt(stmt);
il.Emit(Emit.OpCodes.Ret);
typeBuilder.CreateType();
modb.CreateGlobalFunctions();
asmb.SetEntryPoint(methb);
asmb.Save(moduleName);
System.AppDomain.CurrentDomain.ExecuteAssembly(moduleName);
this.symbolTable = null;
this.il = null;

}
so please help me to figure out conceptually how i can get register based execuition of MSIL. or is there any other way of achieving register based compilation in C#?
thank you in advance!

Re: hi

Dave Kreskowiak11-Mar-10 5:19

Dave Kreskowiak

11-Mar-10 5:19

Djtech01 wrote:
in my code generator part I face one big problem. It's the fact that microsoft intermediate language only supports stack based execuition

Wait a minute. Your statement makes no sense at all. The .NET execution model has nothing to do with your compiler since it's your compiler code that's writing the resulting target for execution. Are you saying that you're using one of the .NET compilers to compile your code?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

convert foxpro project to c#/ms sql2005 server project

bharatvpatil11-Mar-10 1:52

bharatvpatil

11-Mar-10 1:52

hello sir/madam,
I want to convert my foxpro application to c#/ms sql2005 server application.
It is a student management system.
If u have any tool or any simple method to convert it please email me.
My email id- bharat_v_patil@yahoo.com
Thanks in advance,
-bharat patil

Re: convert foxpro project to c#/ms sql2005 server project

Dave Kreskowiak11-Mar-10 1:59

Dave Kreskowiak

11-Mar-10 1:59

There is no tool. You have to rewrite the code from scratch.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

Re: convert foxpro project to c#/ms sql2005 server project

dan!sh 11-Mar-10 4:30

dan!sh

11-Mar-10 4:30

They are quite different. You would really not do a line to line conversion. Hence no tool would help. You will need to spend time and do it yourself.

get the stream writer of the webbrowser control

Yustme11-Mar-10 1:38

Yustme

11-Mar-10 1:38