DataRow.GetChildRows do not return any rows - C# Discussion Boards

DaveyM6924-Apr-09 1:18

24-Apr-09 1:18

The BitArray class did it. It's actually a UInt16 (from an interop function) that I needed to convert.
_ChannelMask is the UInt16 and _ChannelAvailability is the Boolean[]

new BitArray(new byte[] { (byte)_ChannelMask, (byte)(_ChannelMask >> 8) })
    .CopyTo(_ChannelAvailability, 0);

Thanks for the suggestion Big Grin | :-D

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: bool[] from value

JoeSharp24-Apr-09 1:07

JoeSharp

24-Apr-09 1:07

hi
had a look in the BitArray class in the System.Collections namespace.
maybe this will help you.

regards

Re: bool[] from value

DaveyM6924-Apr-09 1:20

DaveyM69

24-Apr-09 1:20

Thanks - I actually discovered that class just after posting! Serves me right for not googling for BitArray!

how to repeat the files stored in d playlist

mist_psycho24-Apr-09 0:41

mist_psycho

24-Apr-09 0:41

the following code plays video files by storing it in a playlist.But it stops when the last file is played. I want the files to play in repeat mode...how can i enable repeat mode, in my code

plz help-----

thanks !!!!

**************************************************************************
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

System.IO.FileInfo[] files = null;
int index = 0;
string plist;
private void Form1_Load(object sender, EventArgs e)
{
System.IO.DirectoryInfo df = new DirectoryInfo("C://Images");
files = df.GetFiles("*.wma");

WMPLib.IWMPPlaylist pl;
pl = axWindowsMediaPlayer1.mediaCollection.getByName(plist);

WMPLib.IWMPMedia m;
if (files != null)
{
if (files.Length <= index)
{ index = 0; }
else
{
m = axWindowsMediaPlayer1.newMedia(files[index++].FullName);
pl.appendItem(m);
}

}

axWindowsMediaPlayer1.currentPlaylist = pl;

}

}
}
**************************************************************************

----mist-----

Re: how to repeat the files stored in d playlist

Henry Minute24-Apr-09 1:18

Henry Minute

24-Apr-09 1:18

create a bool field

bool keepPlaying = true; then<br />
<pre><br />
while (keepPlaying)<br />
{<br />
    pl.Clear() // This might not be exactly correct, look up how to clear the list<br />
    if (files != null)<br />
    {<br />
        if (files.Length <= index)<br />
        {<br />
            index = 0;<br />
        }<br />
        else<br />
        {<br />
            m = axWindowsMediaPlayer1.newMedia(files[index++].FullName);<br />
            pl.appendItem(m);<br />
        }<br />
<br />
    }<br />
<br />
    axWindowsMediaPlayer1.currentPlaylist = pl;<br />
}<br />
<br />
</pre><br />
<br />
then you can have a cancel button and in the <code>onclick

handler have keepPlaying = false;. Of course that will only stop when it reaches the end of the playlist, unless you also stop the player when setting the flag to false.

You are having a lot of problems getting this application working, mostly with concepts that are elementary. I would seriously suggest that you get a C# getting started book and work through it, before continuing.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Validate xml against DTD

Rohit16db24-Apr-09 0:25

Rohit16db

24-Apr-09 0:25

Hi guys,

Hope you are doing well.

I have a Onix complaint XML document that I want to validate it with some Onix complaint DTD. I did coding for same in C#

XmlReaderSettings settings = null;
try
{

string xmlPath = Server.MapPath("XML/nielsen_onix.XML");

//Load XML into XmlTextReader
// reader = new XmlTextReader(xmlPath);
//Load XmlTextReader into XmlValidatingReader
settings = new XmlReaderSettings();

//Set the validation type
settings.ValidationType = ValidationType.DTD;
settings.ProhibitDtd = false;
settings.CheckCharacters = false;
//Hook up the XmlValidatingReader’s
//ValidationEventHandler to a call
//back method named ValidationCallBack
settings.ValidationEventHandler += new ValidationEventHandler(
this.ValidationCallBack);
XmlReader reader = XmlReader.Create(xmlPath, settings);
//Read through the XML document by calling
//the Read() method
while (reader.Read()) { }

//Check boolean field named valid (located at top of code)
if (valid)
Response.Write("Validation is Successful!");
reader.Close();
}
catch(Exception ex) {
Response.Write(ex.Message);
}

This code runs good and show the xml file invaid while my xml file is valid when I validated it on
http://www.w3schools.com/XML/xml_validator.asp[^]

Could you please check what's wrong going with me?

Any help would be highly appreciable.

Thanks
Rohit

swap printer ports

nijix123-Apr-09 23:32

nijix1

23-Apr-09 23:32

I am a new c# programmer and i need to create a c# program which can connect to a network printer and swap the ports i.e if printer 1's port is 192.11.36.1 and printer 2's port is 192.11.36.3 i need to be able to swap these over by the click of a button then switch them back again. Please Help

DataRow.GetChildRows do not return any rows

Member 411807123-Apr-09 23:28

Member 4118071

23-Apr-09 23:28

I am using System.Data.DataRelation object to get the child rows using DataRow.GetChildRows method. GetChildRows method works for 100000 records but when there are 100001 records it do not return any child rows. Is there any limitation for this?

Thanks

What is the funda behind the comm component.. ?

ddravin200023-Apr-09 23:15

ddravin2000

23-Apr-09 23:15

Hi, my project is in ms studio 2005. when i use comm component(axWinSock)
in my project and again installed it to the client pc.
the program is not running.

"it gives an error project.exe encountered an error needs to close"
however
i installed .Net Freamwork 2.0 on that machine but problem is same..
i copied the mscomm.ocx file in the system32 folder but i could not solve this..
the mswsock.dll is also available on client side...

* What is the funda behind the comm component.. ?
* is there any program that I have to run on client machine..

Rose | [Rose]

Re: What is the funda behind the comm component.. ?

DoctorMick24-Apr-09 0:46

DoctorMick

24-Apr-09 0:46

Use Dependancy Walker [^] to see if any dependancies are missing.

Re: What is the funda behind the comm component.. ?

PIEBALDconsult24-Apr-09 3:52

PIEBALDconsult

24-Apr-09 3:52

What's a "funda"? Confused | :confused:

monitoring whole registry

Gergely Revay23-Apr-09 23:14

Gergely Revay

23-Apr-09 23:14

Hi,

What I would like to do is to monitor the whole registry in win xp. The best would be to receive an event when a registry key has changed/created/received but in a way that I could figure out which key was it.

So far I subscribed for quite a few RegistryTreeChangeEvent to see the tree changes in every hive. But the problem with this is that in RegistryTreeChangeEvent I couldn't figure out which key changed just the hive and the rootpath. I tried to find the change in the registry but it's very time and resource consuming.

My next idea would be to register for RegistryKeyChangeEvent and RegistryValueChangeEvent for every registry key but I'm guessing it would have a huge overhead.

So if anybody knows any way to receive events when something changes in the registry or how to monitor the whole registry at all then please tell me!

And I have read some articles here which were useful in general but it didn't solve my problem:
http://www.codeproject.com/KB/system/WMI_RegistryMonitor.aspx
http://www.codeproject.com/KB/system/registrymonitor.aspx

Thanks in advance,

Geri

Re: monitoring whole registry

Bharat Jain24-Apr-09 2:39

Bharat Jain

24-Apr-09 2:39

Hi Geri,

I think you may find something using "Windows Hooks" , you need to search for it , i am assuming that if registry value is changed a message or notification should be sent to the system , we can use "Windows Hooks" to get this message form the system's message queue (i am not not sure about the method , just try to mention a possible solution) , the above two methods u mentioned do pooling on to registry , which not good always Smile | :)

-Regards
Bharat Jain
bharat.jain.nagpur@gmail.com

Re: monitoring whole registry

Gergely Revay25-Apr-09 10:14

Gergely Revay

25-Apr-09 10:14

Hi,

First of all thanks for your reply! I looked for some reading on the windows hooks you mentioned, but unfortunately I haven't had much luck. The thing is that I couldn't find any hooks which would give information about the registry. Actually I found these hook types:

* WH_CALLWNDPROC and WH_CALLWNDPROCRET Hooks
* WH_CBT Hook
* WH_DEBUG Hook
* WH_FOREGROUNDIDLE Hook
* WH_GETMESSAGE Hook
* WH_JOURNALPLAYBACK Hook
* WH_JOURNALRECORD Hook
* WH_KEYBOARD_LL Hook
* WH_KEYBOARD Hook
* WH_MOUSE_LL Hook
* WH_MOUSE Hook
* WH_MSGFILTER and WH_SYSMSGFILTER Hooks
* WH_SHELL Hook

http://msdn.microsoft.com/en-us/library/ms644959(VS.85).aspx

but none of them looks useful for me. If you have any other ideas or links where I could read more then it would be very much appreciated.

cheers

Geri

About Water Mark over Existing Video

Abhishek Rana23-Apr-09 21:40

Abhishek Rana

23-Apr-09 21:40

hi,
I m devloping a windows application in which i want to give the facility to add water mark over existing video,i am using an Directshownet library for that.Any one help me for the same?

Differnce between private readonly fields and non private readonly fields

DJ24523-Apr-09 20:44

DJ245

23-Apr-09 20:44

hi,
What is the major differnce between private readonly fields and non private readonly fields... waiting for reply...

Regards,
Prajilal

Re: Differnce between private readonly fields and non private readonly fields

Ashfield23-Apr-09 20:51

Ashfield

23-Apr-09 20:51

Exactly what it says. Private are private, public are public. Its a basic programming concept.

Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP

Re: Differnce between private readonly fields and non private readonly fields

CPallini23-Apr-09 21:41

CPallini

23-Apr-09 21:41

DJ245 wrote:
What is the major differnce between private readonly fields and non private readonly fields... waiting for reply...

'non'?

A readonly field cannot, by definition, be written. A private readonly field cannot be read too (only an instance of the class defining such field can) while (for instance) a public readonly field can be (publically!) read.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Differnce between private readonly fields and non private readonly fields

PIEBALDconsult24-Apr-09 3:53

PIEBALDconsult

24-Apr-09 3:53

Private fields are trickier to access by the public.

how to read pdf file....

raj23136223-Apr-09 20:16

raj231362

23-Apr-09 20:16

hi..friend,

I tried PDFBox. i am working on window apllication dot net framwork 3.5 and as per your information i added .dll file-

# IKVM.GNU.Classpath.dll
# PDFBox-0.7.3.dll
# FontBox-0.1.0-dev.dll
# IKVM.Runtime.dll

in my application and also used this code to open pdf,here is my code...

string Ppath = "C:\\Documents and Settings\\Administrator\\Desktop\\sample \\KT_19100101\\AC_01\\0001.pdf";
PDDocument doc = PDDocument.load(Ppath );
PDFTextStripper pdfStripper = new PDFTextStripper();

but i got error message like..

expected='startxref' actual='13' org.pdfbox.io.PushBackInputStream@158d014
string aaa = pdfStripper.getText(doc);

so please send realted code to my mail id... bettiahamit@gmail.com
i really appriciated you.
i am waiting your response.

thx,
amit

Re: how to read pdf file....

Christian Graus23-Apr-09 20:26

Christian Graus

23-Apr-09 20:26

raj231362 wrote:
as per your information i

You're mistaken. I didn't tell you anything. If you want to continue a discussion with someone, reply on that thread.

raj231362 wrote:
expected='startxref' actual='13' org.pdfbox.io.PushBackInputStream@158d014

Are you sure your PDF is well formed

raj231362 wrote:
so please send realted code to my mail id... bettiahamit@gmail.com

You are an idiot.

1 - if you registered with this email, you would get any reply emailed to you
2 - putting your email on a public forum is a good way to get spam
3 - why would we email someone who wants our help but apparently doesn't value this forum enough to read it ?

Christian Graus

Driven to the arms of OSX by Vista.

"I am new to programming world. I have been learning c# for about past four weeks. I am quite acquainted with the fundamentals of c#. Now I have to work on a project which converts given flat files to XML using the XML serialization method" - SK64 ( but the forums have stuff like this posted every day )

Re: how to read pdf file....

raj23136223-Apr-09 20:39

raj231362

23-Apr-09 20:39

hi Christian,

sorry for that mistake...

please help me if there is such mistaken by me...what is this..!!

help me..!!

thx
raj

Re: how to read pdf file.... [modified]

tom57200723-Apr-09 22:09

tom572007

23-Apr-09 22:09

I don't know how use this library.
I 'll advise you to use the iTextSharp library which is well know by a large number of developpers.
It seems to be easier to get tutorial on the net...

modified on Friday, April 24, 2009 5:45 AM

Re: how to read pdf file....

raj23136223-Apr-09 22:39

raj231362

23-Apr-09 22:39

hi..tom,

thx for ur warm response...
if there is any related topic or example??
which provide me some help...!!

i am waiting ur response.

thx
raj

Re: how to read pdf file....

tom57200723-Apr-09 23:52

tom572007

23-Apr-09 23:52

I think you were able to it yourself, it pretty easy Dead | X|

:
Here
The first answer is a Code project link, so you can also search on the website before annoying people with small talk

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