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You'll learn more by trying it. 
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Hi,
I have large amount of Binary data from which i need to generate HEX. What would be the best approach and more efficient way, if you have any samples please give me.
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Do you mean you have for example a text file full of 0's and 1's that you need to turn into a text file of Hex?
My current favourite word is: PIE!
I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated
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Yes you are right !! ., i have full of 1's and 0's.
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Convert the bits to HEX digits in groups of four. Fill any data structure (string array, List<string>) will 16 values, which will have the binary codes for each HEX digit:
0000
0001
0010
...
1110
1111
Then traverse the string of ones and zeroes, group them by four and look at the index where the match occurs in your collection. That index is the corresponding hex digit. (For 11,12,..., 15 you replace them with A, B,..., F)
Good luck.
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Well, i'm not sure on efficiency, but this is the only way i know:
string binary = "11001100";<br />
string hex = Convert.ToString(Convert.ToInt32(binary, 2), 16);
Basically, Convert.ToInt32, converts the string binary from a string of numbers with base 2, into an int.
Then Convert.ToString converts from an int, to base 16 (hex).
You may then want to pad left with 0's, i say want, you will probably need to.
So, you need to read a few characters (no less than 4) and convert it into hex as shown above, then write that to a file. Read the next set of characters, convert, write. And repeat.
8 characters would be 1 byte, 16 would be a half word (2 bytes) and 32 would be a word (4 bytes).
You may also need to do a little formatting on the string, i'm not sure if it comes out as "0xFF" or just "FF" (in the case of reading 8 characters, all 1's)
My current favourite word is: PIE!
I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated
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Somehow an app I've written is generating this exception and I could use some help figuring out how. In the VS debugger the app stops at the Application.Run line when the exception occurs and the Exception helper doesn't offer anything that seems useful, just a statement that memory is corrupt somewhere. The stacktrace doesn't offer much either other than to tell me that it's crashing in some native Windows Forms method (full stacktrace below). To make things even easier, I can't even nail down a repeatable process to recreate the exception, it just seems to happen every now and then when I perform certain steps in the GUI.
I've followed all of the suggestions that I can find on MSDN and the rest of Google, but to no avail. Things that I've already tried include removing all references to unmanaged code, reinstalling .Net and double buffering elements of the GUI. Can anyone offer any advice or ideas on how to diagnose this?
Stacktrace:
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at Sentry.SensorEditor.Program.Main()
MSDN[^]
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The crash has probably happened in native code inside a GUI component that you're using. For any more information you'll have to use the native code debugger, then you might get more information.
DoEvents: Generating unexpected recursion since 1991
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I found this 3D Graph ActiveX Control in this website, but I don't konw how to use it?
what is m_Graph3D then? it seems to be a instance of the class.
Any one who has used it, please give me one hint.
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You should address this question to the author of the article.
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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where is the problem with this query ?
Record_Date type is datetime.
and txtDate1 and txtDate2 type is string.
////////////////////////////////////////////////////////////////////////////
cmd.CommandText = "SELECT KODU,CDISMI,CDTURU,CDADET,ACIKLAMA FROM TBL_PS_2" +
" WHERE RECORD_DATE BETWEEN '" + txtDate1.Text + "' AND '" + txtDate2.Text + "' ";
///////////////////////////////////////////////////////////////////////////
but getting error about datatype char conversion to datetime bla bla.
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tr_thorn wrote: where is the problem with this query ?
1. You should always use parameters to do this. Don't fall a victim to Sql Injection attacks[^].
2. The dates are not in a format that is being recognised in the server. For instance, if your date is 23/06/07 and your database is running with American format, it won't recognise this as a valid date - even though it is a valid date in the UK. Try passing dates across in UTC format instead.
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My date is 28.11.2007 and Db is saving dates like 28.11.2007:00:00:00 ... when i search it from textboxes
getting "The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value." this error.
Whhats the problem ?
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just to proove Pete is right, try typing into the textbox 2007-11-28 instead of 28.11.2007
I pretty much guarantee it'll work.
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tr_thorn wrote: The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value." this error.
Whhats the problem ?
Well, if you solve the SQL Injection Attack problem you automatically solve your date problem too. Long story short: Use parameterised queries!
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tr_thorn wrote: 28.11.2007:00:00:00
Sorry to be picky, but that's not how the database is saving it. It's how it's being displayed which is a completely different issue altogether.
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Pete O`Hanlon wrote: Sorry to be picky
Be picky, it is good information.
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i want to know the code of how to convert the .wav files to byte array using c#.net
help me please.
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Read it into an appropriate stream and then write it out of the stream using the stream ToArray() method.
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If you use ToArray you will put the whole stream in memory. Wave files are notoriously large so it would be much better to incrementally use the bytes from the streams Read method. While I know you know that Satish may not.
Need a C# Consultant? I'm available.
Happiness in intelligent people is the rarest thing I know. -- Ernest Hemingway
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Actually, that's an excellent point. Have yourself a 5 for that sir, and I really should have mentioned that myself. (Kicks self for missing it).
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HELP! confused:
I am very new to c# and am trying to firgure out what the best way to write a dataset (created from xml) to a database table.
Problem is that I will not know the table structure, so need to create the table based on what is in the dataset (table needs to be a copy of the dataset). Once the table is created i'd like to write all the data in the dataset to the table. Once this is done, I may need to repopulate the dataset with new data (same table structure) and append this data to the newly created table in the DB.
To put this in contect I am trying to use a webservice that only sends data back as xml / csv and will only do a date range. So if i ask for the data from 25/01/2007 to 30/01/2007 it will lump all the data together and give me a total for the period. I need it to give me the totals for each day and thus have to call the webservice once for every day in the range. I am currently calling it and getting the first xml file into a dataset, then would like to write that data to a db, and then call it for the next day and append the data to the db.
Any advice welcomed.
Thanks
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Are you still having trouble with this? Doing a google search is always helpful.
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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Hi, i have requirement to display the time in seconds. The time should autoupdate on webpage without refreshing the page?
how can we achive this in c# using asp.net(not in windows application)
Thanks in advance
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You have to use JavaScript to do this. There are lots and lots of samples available via google on this.
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