change selectedItem color in listBox - C# Discussion Boards

skyeddie12-Aug-06 4:49

12-Aug-06 4:49

hi all how do u do a password autherication application using VS 2003 i have found some articles here but it's in 2005 format and i cant open the source code...
can anyone give me links to related articles in vs03 version ??
thanks Smile | :)

Re: password

CooperWu13-Aug-06 0:34

CooperWu

13-Aug-06 0:34

there no related articles in VS2003 if the article is about Membership.

How do others make a shareware registration system?

Stick^12-Aug-06 4:13

Stick^

12-Aug-06 4:13

To create a simple registration system for my program, I create a fingerprint from the users HD serial number, and create a 'salt' with the user's name, email, and the program name. This is then hashed, and compared with the key that I provide them based on the HD serial they provide me.

What are others doing?

Re: How do others make a shareware registration system?

mav.northwind12-Aug-06 5:17

mav.northwind

12-Aug-06 5:17

I think using the HD serial number is quite user-unfriendly. Harddisks tend to fail sooner or later and can easily be exchanged. So if you have to request a new key because the SW you bought doesn't work any longer after a disk failure, I'd be quite pissed.

Binding a software to a single PC can never be done 100% safe and user-friendly, but in my company (we don't create shareware, but that's not the point) we chose to use the computer name (hostname) as the identifying property, since it's the least probable to change.
Of course, if you don't have a network connection you can have more than one PC with the same hostname, but in real life this just doesn't occur.

That way, any part of HW can fail and be exchanged, even if you restore a complete system backup to a completely new machine the hostname is kept unchanged, so this method is working quite well.

Regards,
mav

--
Black holes are the places where god divided by 0...

Click 'Start Debugging' but nothing happens

J Liang12-Aug-06 3:57

J Liang

12-Aug-06 3:57

Hi everyone,

I recently converted my vb.net code to c#.net, it was running ok at first with few minor error that needed me to attend to. Then when finally I got all the error fixed and press 'F5' to start debugging or run my application, my application did not pop up, it is running but it seems my .exe did not run.

I don't understand what happened as this is the first time I encounter this, please do let me know why is this happening, without the application running I can't proceed.

Btw, before I post this one error message appear saying some stack overflow.

Thanks

Jie Liang

Re: Click 'Start Debugging' but nothing happens

Rob Graham12-Aug-06 4:16

Rob Graham

12-Aug-06 4:16

Evidently you made some change that is causing a stack overflow before the visible window is rendered. Most likely you changed some code in an event handler in such a way that it is being called recursively, resulting in a stack overflow. Put a breakpoint at the beginning of the routines you modified, then single step until you spot the bug.

Re: Click 'Start Debugging' but nothing happens

J Liang12-Aug-06 6:38

J Liang

12-Aug-06 6:38

Hi Rob,

Thanks, I found out why. I was calling a function in let say ParentPage call ParentPageFunc in ChildPage by doing this 'ParentPage parent = new ParentPage()' which is why the ParentPage is being created again and again before the ParentPage can be shown. So instead of that I do this 'public ParentPage parent' so that I can do this 'parent.ParentPageFunc' in ChildPage. And the ParentPage pops out as normal.

Jie Liang

change selectedItem color in listBox

Nafiseh Salmani12-Aug-06 1:30

Nafiseh Salmani

12-Aug-06 1:30

hi How can i change color of an item of listbox which is selected or set focus?

Thanks for your favor.

Re: change selectedItem color in listBox

Guffa12-Aug-06 2:38

Guffa

12-Aug-06 2:38

Open the display properties in the control panel. Go to Apperabce, click Advanced. Choose "Selected Items" and change the color.

This will of course change the color of all selected items in the system.

---
b { font-weight: normal; }

How to use Windows Service to call a Windows Form

IamFengDong12-Aug-06 1:21

IamFengDong

12-Aug-06 1:21

Just like the tittle,
In a Windows Service ,A Process(such as Process pro1 = new Process("aa.exe");) was used to call a windows application,but deny.
Thanks for your help. Smile | :)

capturing data from modem

mehrdadc4812-Aug-06 0:29

mehrdadc48

12-Aug-06 0:29

hi there
I want to capture received data from modem.I have been testing it with serialport class in .Net , but it diden`t work completely.
What should i do for it.

Best wishes

Re: capturing data from modem

Divyang Mithaiwala12-Aug-06 2:14

Divyang Mithaiwala

12-Aug-06 2:14

Hello,

I hope this 2 application will work.
Plz try them.
http://www.codeproject.com/cs/internet/sharppcap.asp
http://www.codeproject.com/csharp/pacanal.asp

i m not sure.

regards,
Divyang Mithaiwala
System Engineer & Software Developer

Re: capturing data from modem

stancrm12-Aug-06 4:21

stancrm

12-Aug-06 4:21

Do you want to capture the data through IP or through serial port ?

For IP see the reply from Divyang Mithaiwala.
For serial port, use this : http://www.compt.ru/

How do you pass by reference in c#?

honeyman_can12-Aug-06 0:21

honeyman_can

12-Aug-06 0:21

hi guys!
I'm a newbie to c#

Method signature: public static string Translate(string translationCode, string culture, ref Dictionary<string, Dictionary<string, string>> input)

I want to pass a dictionary by reference and not the entire object.
Is it correct to use 'ref' in the argument?
Then how do I insert the dictionary when calling the method?

thanks

Re: How do you pass by reference in c#?

Guffa12-Aug-06 1:48

Guffa

12-Aug-06 1:48

Reference types (objects) are never copied when you use them in a call. It's always the reference to the object that is sent to the method.

If you use the ref keyword with a reference type, you will be sending a reference to the reference.

Parameters are always sent by value unless you specify the ref keyword. For reference types that means that the value of the referecne is passed to the method.

Example:

void Test(string a, ref string b) {
   a = "1";
   b = "2";
   Console.WriteLine("a: " + a);
   Console.WriteLine("b: " + b);
}

string x = "x";
string y = "y";
Console.WriteLine("x :" + x);
Console.WriteLine("y :" + y);
Test(x, ref y);
Console.WriteLine("x :" + x);
Console.WriteLine("y :" + y);

The output will be:

x: x<br />
y: y<br />
a: 1<br />
b: 2<br />
x: x<br />
y: 2

---
b { font-weight: normal; }

Generate XML Documentation File(Help File)

parvinder sehrawat12-Aug-06 0:19

parvinder sehrawat

12-Aug-06 0:19

How can we generate help file in (c#)visual studio 2005.

Using NDoc utility or through any other method........

thanx in advance...

Regards
parvinder

nsyogi12-Aug-06 0:01

nsyogi

12-Aug-06 0:01

how to save a dataset and its row to the sqlserverc

Re: c#

Colin Angus Mackay12-Aug-06 5:20

Colin Angus Mackay

12-Aug-06 5:20

nsyogi wrote:
how to save a dataset and its row to the sqlserverc

use dataadapter

* Developer Day Scotland: are you interested in speaking or attending?
My: Website | Blog

Customize MessageBox

pranu_1311-Aug-06 23:14

pranu_13

11-Aug-06 23:14

Hi all,

Can i add constants to MessageBoxButtons enumeration...

either by overriding or by using unmanaged code.........

Did anyone come across this.............

Re: Customize MessageBox

Filip van der Meeren11-Aug-06 23:17

Filip van der Meeren

11-Aug-06 23:17

What do you mean ?
Do you want a extra button available ?

Don't you also love the code?

DataTable internal index is corrupted ... Is exist an reason?

priyasheth@mechsoftgroup.com11-Aug-06 22:55

priyasheth@mechsoftgroup.com

11-Aug-06 22:55

Hello
I am also facing a problem with datatable. I have been using a class which inherits a dataset, datatables, and rows. When I delete a row from table, it leaves a blank row with row state deleted and from here the problem starts. Prior there was no problem with deleting the rows from DataGrid (which is bound to my datatable). I am using a binding source to bind the data. Searching rows in table by 'FindByid()'. I am removing the row by 'DataTable.RemoveTableRow(row)' the error message displayed is as follows...

System.InvalidOperationException: DataTable internal index is corrupted: '5'.
at System.Data.RBTree`1.RBInsert(Int32 root_id, Int32 x_id, Int32 position)
at System.Data.RBTree`1.RBInsert(Int32 root_id, Int32 x_id, Int32 position)
at System.Data.Index.RecordStateChanged(Int32 oldRecord, DataViewRowState oldOldState, DataViewRowState oldNewState, Int32 newRecord, DataViewRowState newOldState, DataViewRowState newNewState)
at System.Data.DataTable.RecordStateChanged(Int32 record1, DataViewRowState oldState1, DataViewRowState newState1, Int32 record2, DataViewRowState oldState2, DataViewRowState newState2)
at System.Data.DataTable.SetNewRecordWorker(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge, Int32 position, Boolean fireEvent, Exception& deferredException)
at System.Data.DataTable.SetNewRecord(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge, Boolean fireEvent)
at System.Data.DataRow.EndEdit()

Above that, this error message come after some runs, i.e when we remove the rows from table for some number of times.

Please can any one help me in this... I dont know the cause of this problem, neither the solution....

Thanks in advance.

Priya

play mp3 in database

chinajuanbob11-Aug-06 22:16

chinajuanbob

11-Aug-06 22:16

hello everybody!
(1)
i want to play mp3 which is contained in a database, and i don't want to read the data, write it to the disk and play the file from disk. i just want to play it from memory directly.
How should i do?
(2)
i want to splite some mp3s into pieces,and each piece has different length.
is there any tools that can auto splite the files using the custom length showed in an index file, maybe use .lrc file?

thx and sorry for my poor English.

Re: play mp3 in database

chinajuanbob12-Aug-06 0:04

chinajuanbob

12-Aug-06 0:04

i have found a good tool to solve problem 2.

http://chinajuanbob.spaces.live.com/

Re: play mp3 in database

eggsovereasy14-Aug-06 5:23

eggsovereasy

14-Aug-06 5:23

Trying looking into MemoryStream and see if you can't feed that to whatever is playing the song.

Re: play mp3 in database

chinajuanbob14-Aug-06 5:41

chinajuanbob

14-Aug-06 5:41

what's your mean?
i can get blob of mp3, put it into database and get byte[] of it from db.the only problem now is how to play these byte[] without saveing them to a film on the disk, i just want to play mp3 on the fly~

http://chinajuanbob.spaces.live.com/

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