Converting BitArray to string - C# Discussion Boards

Re: database connection problem

MNantu6-Dec-09 23:20

MNantu

6-Dec-09 23:20

Which OS do you use by the way

Re: database connection problem

Erdinc276-Dec-09 23:43

Erdinc27

6-Dec-09 23:43

i use windows XP

Re: database connection problem

lalit147-Dec-09 0:01

lalit14

7-Dec-09 0:01

Try "Integrated Security=false" and the above code i have given...

i Hope it will work

Regards

Lalit Manik

Re: database connection problem

lalit147-Dec-09 0:10

lalit14

7-Dec-09 0:10

Temme 1 thing, the account from which u logged in to Ur computer have rights to access the SQl?

Re: database connection problem

Erdinc277-Dec-09 0:14

Erdinc27

7-Dec-09 0:14

yeah i have given permission to that user
but still it says it doesnt have to reach the db

Re: database connection problem

MNantu7-Dec-09 0:40

MNantu

7-Dec-09 0:40

Is database server running on your local machine ?

Re: database connection problem

Erdinc277-Dec-09 1:19

Erdinc27

7-Dec-09 1:19

yeah it works man
do you think it happens becuase of installation or some another options ??

Converting BitArray to string

Joe Rozario6-Dec-09 21:37

Joe Rozario

6-Dec-09 21:37

Dear Friends,

i have small problem

can U please tell where do i make mistake?

i am converting string value "0000000000000001" to byte array

then again i am converting back byte array to string

the out put is like these "0000000010000000"

private void button14_Click(object sender, EventArgs e)
{
//i am converting string value "0000000000000001" to byte array
string sVall = "0000000000000001";
byte[] bVal =convertBinaryToByte(sVall, 8);

//then again i am converting back byte array to string

BitArray objBitA = new BitArray(bVal);
MessageBox.Show(converBitArrayTostring(objBitA));

}

private string converBitArrayTostring(BitArray objBit)
{
try
{
string sReturnValue = "";
for (int i = 0; i < objBit.Length; i++)
{
sReturnValue += (objBit[i]) ? "1" : "0";
}
return sReturnValue;
}
catch
{
return "";
}
}

private byte[] convertBinaryToByte(string binary, int bitsPerByte)
{
try
{
List<byte> list = new List<byte>();
for (int i = 0; i < binary.Length; i += bitsPerByte)
{
string t = binary.Substring(i, bitsPerByte);

//list.Add(Convert.ToByte(t, 2));
list.Add(Convert.ToByte(t));
}
return list.ToArray();
}
catch
{
return new byte[0];
}
}

please point out my mistake..

is there any othere better method to do this?

help me

by

joe

Re: Converting BitArray to string

dan!sh 6-Dec-09 21:45

dan!sh

6-Dec-09 21:45

To convert a byte array into string, you can make use of GetString method of the various encoding classes available. But be sure that you don't have character which cannot be displayed correct in the encoding you select. Here is an example:

System.Text.UTF8Encoding encoding = new UTF8Encoding();
string str = enc.GetString(byteArray);

50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong...!!

Re: Converting BitArray to string

Joe Rozario6-Dec-09 21:55

Joe Rozario

6-Dec-09 21:55

Dear friend thanks for your replay..

what i want is ...

i have string length is 16 , this string will have only 0 and 1,
now i want to convet it as two byts...

then From two bytes to (original) String.

if i Use encoding It gives me minmum 16 byte array (i do not want that)

Thank U.

Re: Converting BitArray to string

shiplu_20506-Dec-09 22:27

shiplu_2050

6-Dec-09 22:27

Hi Joe
You can do this like

string str = "0000000000000001";
byte[] bb = System.Text.ASCIIEncoding.ASCII.GetBytes(str);

string str2 = System.Text.ASCIIEncoding.ASCII.GetString(bb);
MessageBox.Show(str + "\r\n" + str2 );

Regards
Mamun

Re: Converting BitArray to string

Joe Rozario6-Dec-09 22:32

Joe Rozario

6-Dec-09 22:32

Dear friend thanks for replay....

that's good idea but You see

shiplu_2050 wrote:
System.Text.ASCIIEncoding.ASCII.GetBytes(str);

will return byte array size of 16 ...

i want to make to as 2 bytes ... and form 2 bytes to string.

thank you

Re: Converting BitArray to string

OriginalGriff6-Dec-09 23:17

OriginalGriff

6-Dec-09 23:17

If I read your messages correctly, you want to take in a string of 16 '0' or '1' characters, and convert them to two bytes, then convert the two bytes back to s string?
If so, then the first thing you need to look at is the "<<" operator. This shifts bits a number of places to the left within a byte, int or whatever.
So you would:

For each character in string, convert it to a byte (0 or 1) depending on whether it was '0' or '1'.
Shift that bit into a byte until the byte is full. Save the byte, and move on for the next.

Re-assembling the string from your bytes is the reverse of this, and is probably best done with a method to convert a byte to an 8 character string, used twice.

Honestly, it is quicker to write the code, than to describe it!

No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced.

This message is made of fully recyclable Zeros and Ones

"Rumour has it that if you play Microsoft CDs backwards you will hear Satanic messages.Worse still, is that if you play them forwards they will install Windows"

Re: Converting BitArray to string

Luc Pattyn7-Dec-09 0:36

Luc Pattyn

7-Dec-09 0:36

Hi,

this is not related to character set encodings at all, it is either simple arithmetic, or using the appropriate conversion operations.

if you're sure the string is limited to 16 (or 32 or 64) binary digits, you can use code similar to this:

ushort sh=Convert.ToUInt16(binaryString, 2);
byte hi=(byte)(sh>>8);
byte lo=(byte)sh;

The inverse operation would be:

ushort sh=(ushort)((hi<<8) + lo);
binaryString=Convert.ToString(sh, 2);  // won't have leading zeroes
binaryString=binaryString.PadLeft(16, '0');

BTW: you would need a try-catch block to defend against invalid string input.

Smile | :)

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

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: Converting BitArray to string

Joe Rozario7-Dec-09 7:27

Joe Rozario

7-Dec-09 7:27

Thank you frined ... Smile | :)

i got that.. Big Grin | :-D

CPU Load of a MDI-Child

DrNokill6-Dec-09 19:39

DrNokill

6-Dec-09 19:39

Hello,

I have an application running more MDI-Child windows.
Each MDI-Child has a graph line in it. Depending on CPU Load it may happen that the main application tells me "Application not responding" with 100% CPU Load.
Is it possible to monitor each MDI-Child's CPU and Memory Load?
I can use the PerformanceCounter for a Process and Threads. But how to determine the Process/Thread of the MDI-Child?
Or is there any possibility to stop an MDI-Child that does no longer respond?

Thank you

Customize Quick Access Toolbar for MS Office 2007 applications

Dumb Programmer6-Dec-09 18:34

Dumb Programmer

6-Dec-09 18:34

I am creating a plugin for Microsoft Office 2007 applications (Word, Excel, etc.). I need to add my button to the default QAT (Quick Access Toolbar) which is loaded when these applications start. When I set startFromScratch="false" in my XML file the button which I have added in XML doesn't load in QAT.

But it does appear when I set startFromScratch="true" but in that case i end up loosing my default Tabs & QAT features.

Is there any way to add my custom button to default QAT without loosing any default functionalities and features?
Is there any way I can access QAT directly from C# code without having to use XML file for customization of QAT?

Any help regarding this is highly appreciated!

Regards,
Gurdev Singh

crawling a data of a website

uglyeyes6-Dec-09 14:35

uglyeyes

6-Dec-09 14:35

Hi, I was reading how to create a program that crawls website data. one of the example I found was http://www.codeproject.com/KB/IP/Crawler.aspx

but I dont have much resource to crawl everything. In a ideal e-shops you have product page and product details page. what I would like to do is crawl each product page and product details page and only write data that interests me to my database. e.g. product name, product price, etc etc.

could anyone point me to right direction?

Thank you

Re: crawling a data of a website

Mycroft Holmes6-Dec-09 18:48

Mycroft Holmes

6-Dec-09 18:48

So you have used someones article to crawl some web sites, this is good. Now you need to customise the article to meet your needs, so inspect the data as it is crawled and decide what to do with it.

Something along the lines of if it is a product then turn a store flag on and write the data to the database, identify the token that denotes the end of the product information and turn off the store flag.

Never underestimate the power of human stupidity
RAH

Builtin function for getting all ip addresses?

Jacob Dixon6-Dec-09 14:23

Jacob Dixon

6-Dec-09 14:23

I am having a little problem. I can get the ip address and hostname and such of my local machine, but what I am trying to do is get the ip address range on the LAN from my local address.

So if my ip is:
10.10.50.2
and the subnet is: 255.255.0.0

How do I get C# to give me the start value (which would be 10.10.0.1) and the end value (which would be 10.10.255.255)?

I don't want to have to have this entered in and want it to go off the local computers information. I can already get the ip address and the subnet.. I'm not unsure how to get the start and end from that information

Re: Builtin function for getting all ip addresses?

Dave Kreskowiak6-Dec-09 15:46

Dave Kreskowiak

6-Dec-09 15:46

Jacob Dixon wrote:
How do I get C# to give me the start value (which would be 10.10.0.1) and the end value (which would be 10.10.255.255)?

You have to write the code for that. There is no builtin function to do the math for you. A little Google for "how to calculate ip address range" brings up plenty of results.[^]

A guide to posting questions on CodeProject[^]

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

Re: Builtin function for getting all ip addresses?

Jacob Dixon6-Dec-09 16:59

Jacob Dixon

6-Dec-09 16:59

Thanks.. first I was searching for the wrong things.. like what I was typing in.. but I got something that works for me after modifying it

static string GetRange(IPAddress address, IPAddress subnetMask)
{
    IPAddress ip = address;

    byte[] ipBytes = ip.GetAddressBytes();
    byte[] maskBytes = subnetMask.GetAddressBytes();

    byte[] startIPBytes = new byte[ipBytes.Length];
    byte[] endIPBytes = new byte[ipBytes.Length];

    for (int i = 0; i < ipBytes.Length; i++)
    {
        startIPBytes[i] = (byte)(ipBytes[i] & maskBytes[i]);
        endIPBytes[i] = (byte)(ipBytes[i] | ~maskBytes[i]);
    }

    IPAddress startIP = new IPAddress(startIPBytes);
    IPAddress endIP = new IPAddress(endIPBytes);

    return startIP.ToString() + " -- " + endIP.ToString();
}

Re: Builtin function for getting all ip addresses?

Mycroft Holmes6-Dec-09 18:50

Mycroft Holmes

6-Dec-09 18:50

So you need to thank Dave with a 5 for giving you some of his Google mojo.

Never underestimate the power of human stupidity
RAH

get file name (only)

tamir9016-Dec-09 10:22

tamir901

6-Dec-09 10:22

Hi,

I'm trying to get all the files from directory that ends with *.txt only.
The problem is, when i'm doing:
string[] filePaths = Directory.GetFiles(@"C:\MyDir\", "*.txt");
i get also the path.

How can i get only the filename?

(at the end i have to get a string[] because i need to use it as DataSource)

Re: get file name (only)

Blue_Boy6-Dec-09 10:29

Blue_Boy

6-Dec-09 10:29

Example:

string fileName = @"C:\mydir\myfile.txt";<br />
string result;<br />
result = Path.GetFileName(fileName);

Regards.

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