C# Discussion Boards - CodeProject

18-Feb-07 20:16

hi,i have created the editor in RichTextBox control
and implemented the goto line number functionality.

now I want to find the content length of the perticular line.

Thanks

Christian Graus18-Feb-07 20:49

18-Feb-07 20:49

Measure the text between the two return characters in the string.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

hiremath7118-Feb-07 23:56

18-Feb-07 23:56

hi,
actually not clear can u elabarate it.

I think u got my problem

when ever u compile a program if it leads to any error if we double click that error that it will lead to an corresponding line where that error has been occured.

At present I am able to point to the error line but not the entire line is highlighted.

Thank you.
With Regards
Prasad

Christian Graus19-Feb-07 0:06

19-Feb-07 0:06

If you walk the characters going back from the position you're at, you will find a return character, or 0. If you go forwards, you will find a return character, or the end. This will tell you the length of the substring to highlight. The return has an integer value of (decimal)13. Environment.NewLine is two characters, 10 and 13.

hiremath7119-Feb-07 18:08

19-Feb-07 18:08

hi,
sorry i am not getting can u give one code example pls

help me pls

Thank u

Christian Graus19-Feb-07 19:04

19-Feb-07 19:04

a string contains chars.

foreach (char c in "abcdefg")

will iterate over each charater. You can do it by index, too.

string s = "spit";
s[1] = 'h';

for example.

So, you can take the location of hte cursor, and then look back and forwards for the return character.

hiremath7119-Feb-07 19:57

19-Feb-07 19:57

Thank you
it is working

With Regards
prasad

Values in popup.

Nekshan18-Feb-07 20:14

Nekshan

18-Feb-07 20:14

I have a popup displayed with a form by function:

taskbarNotifier1.Show("HostName: \n\n SiteHit: \n\n Survey: \n\n TAF: \n\n ATO: ", strQuery, 300, 2000, 300);

Now these hostname,survey,taf,ato i have to get from database :

select url,sitehit,survey,tellafriend,addtooutlook from tblsummary where...
of current datetime ie the last current entry of database and display all these data in 'strQuery' in above function in a line ie one after other like this :
Hostname : nekshan@yahoo.com

Sitehit : 1

Survey : 0
These in bold are data to be displayed by the query.
how to get all this data in one variable to put it in my function n display data in this format.

Hope u r getting my Point.
Thanx
nekshan.

Christian Graus18-Feb-07 20:26

18-Feb-07 20:26

Create a struct to hold all this data, if you want to pass it all in one go.

Or, if it has to be a string, use a delimiter or build a query string, like a URL.

virendra patel18-Feb-07 21:50

18-Feb-07 21:50

function can only return one value
so if u want all three then u have to concat all in one variable like
str = str1 + '#' + str2 + '#' + str3

then return str from function

now on form u have to seperate all three from str by using mid(str,'#',1) like this not exactly this function is. u have to seperate like this all in different variable then use it.
bye. virendra.

Christian Graus18-Feb-07 21:59

18-Feb-07 21:59

Yeah, that's one of the answers I gave. Why did you give it 4 times ?

virendra patel18-Feb-07 21:53

18-Feb-07 21:53

function can only return one value
so if u want all three then u have to concat all in one variable like
str = str1 + "#" + str2 + "#" + str3

then return str from function

now on form u have to seperate all three from str by using mid(str,'#',1) like this not exactly this function is. u have to seperate like this all in different variable then use it.
bye. virendra.

virendra patel18-Feb-07 21:54

18-Feb-07 21:54

function can only return one value
so if u want all three then u have to concat all in one variable like
str = str1 + "#" + str2 + "#" + str3

then return str from function

now on form u have to seperate all three from str by using mid(str,"#",1) like this not exactly this function is. u have to seperate like this all in different variable then use it.
bye. virendra.

Re: Values in popup1.

virendra patel18-Feb-07 21:55

Capturing the Event raised in Windows application through my WebPage(aspx page)

18-Feb-07 21:55

function can only return one value
so if u want all three then u have to concat all in one variable like
str = str1 + "#" + str2 + "#" + str3

then return str from function

now on form u have to seperate all three from str by using mid(str,"#",1) like this not exactly this function is. u have to seperate like this all in different variable then use it.
bye. virendra.

irsh_is18-Feb-07 19:58

irsh_is

18-Feb-07 19:58

Hi i am diplaying a windows control in my web page (aspx page), so i am embedding the object in the html code as shown below,

<object id="AMATGraph1" height="100%" width="100%" align="middle" border="0" classid="http:/RSWEB/SmartClients/AMATGraph_" +="" amat.web.defines.getsmartclientversiondirstring()="" "="" amatgraphing.dll#amatgraphing.controls.amatgraphcontrol"="" viewastext="">");
<param name="Server" value="" + _server + "" />
<param name="Username" value="" +="" _username="" ""="" />
<param name="Password" value="" +="" _password="" ""="" />
<param name="HeaderVisible" value="false" />
<param name="FooterVisible" value="false" />
<param name="ControllerClass" value="" +="" _controller="" ""="" />
<param name="AccountName" value="" +="" _accountname="" ""="" />

Now, i want to capture onclcik event raised in windows application in my aspx page, how should i achieve this please advice

Thanks in Advance

Asynchronous Technical question !!

Hussam Fattahi18-Feb-07 19:51

Hussam Fattahi

18-Feb-07 19:51

I'm writing a client\server application, and I have a problem in server part because I want that part to manage more than one client at time, I used asynchronous operations and here comes the problem, I don't know how these function exactly works( I mean in the runtime environment) , this is the code summarized as possible, in the form constructer

server = new Socket(AddressFamily.InterNetwork, SocketType.Stream,
                ProtocolType.Tcp);
            IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("169.254.25.129"), 9050);
            server.Bind(ipep);
            server.Listen(-1);
            server.BeginAccept(new AsyncCallback(AcceptConn), server);

The asynchronous callback function (AcceptConn) accepts one incoming connection and assign a socket to deal with this connection, and at the end of the function I call the BeginAccept function again to begin to accept other incoming connections.
I have a class ConnectionInformation to keep all the information a bout one connection, and the ConnSock is a property to access the socket member in the class
And the sockCount to keep track of instances of ConnectionInformation in the array connInfo.

public void AcceptConn(IAsyncResult iar)
        {
            Socket oldServer = (Socket)iar.AsyncState;            
            connInfo[sockCount].ConnSock = oldServer.EndAccept(iar);
            
            //begin an asynch receive operation, to receive any data coming from remote host
            connInfo[sockCount].ConnSock.BeginReceive(DataReceiveBuffer, 0, DataReceiveBuffer.Length,
                SocketFlags.None, new AsyncCallback(ReceiveData), connInfo[sockCount].ConnSock);
            
            //Fill information into data grid
            FillInDataGridView(connInfo[sockCount]);
            
            //begin an asynch accept operation, to listen to any incoming connection
            server.BeginAccept(new AsyncCallback(AcceptConn), server);            
        }

And in the asynchronous callback function(ReceoveData) for the BeginReceive operation I do the same

public void ReceiveData(IAsyncResult iar)
        {
                Socket remote = (Socket)iar.AsyncState;
                int recv = remote.EndReceive(iar);
                
                // to begin other async receive operation
                remote.BeginReceive(DataReceiveBuffer, 0, DataReceiveBuffer.Length, SocketFlags.None,
                    new AsyncCallback(ReceiveData), remote);       
 }

The problem is when I run the application, and after I run two client application, the server part stucks on the screen and refuse to do any thing,(note: I'm using datagridview to show connection information).

i didn't know what the problem since the compiler didn't show any error, is that because there is finite loops in the AcceptConn and ReceiveData functions, or do these operations took a lot of memory.

and what its better, using asycnh operations, or begining a thread and using blocking method indide these thread.
I need advise on hints, if there is other way easier than the code above I would appreciate to know about, or any other suggestion.

And thanks in advance.

how to protect C# exe from decompiling or reverse engineering ?

testmail_12318-Feb-07 19:20

testmail_123

18-Feb-07 19:20

How to protect code from reverse Engineering and get source code? As decompiler are easily available any one can easly get source code.Can Strong Name or obfuscator software guarantee source code protection.Is there any other technique apart from these?any other language like vc++ or java code have more security features ?

Re: how to protect C# exe from decompiling or reverse engineering ?

MoustafaS18-Feb-07 20:00

MoustafaS

18-Feb-07 20:00

All .NET assemplies can be decompiled, you may use obfuscator, and there is other programs to protect the dll as all, seacrh google for it.

------------------------------

"About my religion : Islam ..."

Re: how to protect C# exe from decompiling or reverse engineering ?

Guffa18-Feb-07 20:04

Guffa

18-Feb-07 20:04

You can never get the original source code from the executable file, but it's always possible to reverse engineer it.

You can use obfuscators to make the process harder, but there is no sure protection.

---
single minded; short sighted; long gone;

Re: how to protect C# exe from decompiling or reverse engineering ?

Christian Graus18-Feb-07 20:27

18-Feb-07 20:27

C# is essentially Java. C++ is more secure, by a long shot, but any language can be decompiled.

To exit application

Nekshan18-Feb-07 19:03

Nekshan

18-Feb-07 19:03

private void button1_Click(object sender, EventArgs e)
{
conn.Open();
System.Windows.Forms.Form login_ = new login();
login_.Show();
if (login_.Close())
{
Application.Exit();
}
conn.Close();
}
i m opening this form 'Login' on button click n then if i close this form by clicking on close button, application itself must also stop running automatically. As even if i close all forms the application keeps on running till i stop it myself.

Plz help on it.
Thank You.

-- modified at 1:13 Monday 19th February, 2007

Re: To close application

U-P-G-R-A-Y-E-D-D18-Feb-07 19:18

U-P-G-R-A-Y-E-D-D

18-Feb-07 19:18

You have to set up an event handler for the Form.Closed or Form.Closing events then handle your application exiting functionality there. However you're going to want to probably inherit the form class into a new loginform class so that you know the internal state of the login form so you will know if the form window is closing because the [X] was pressed, or because the login process completed and it's time to move onto different things, without exiting the application.

Re: To exit application

virendra patel18-Feb-07 19:47