how to add a string on any type of file and then detect the specific word from that string and then delete that specific word from files using c#.net

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I want to create an application on which first i have add one string like "Try Try But Don't Cry" i want to add this string to some files on my pc and then I want to delete "But" i want to check the files for that certain word weather that files contains that word or not if the files contains that word delete that word from files

Posted 6-Apr-15 6:17am

Member 11057488

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CHill60 6-Apr-15 12:34pm

So what have you tried so far?

Member 11057488 6-Apr-15 12:37pm

i want to insert one string on ny file which is on my desktop.
then i have to detect all files that any specific word should be on that file text then delete that specific word from the string which is on that file

CHill60 6-Apr-15 12:39pm

I didn't ask you what you wanted to do. I asked you what have you tried so far

Member 11057488 6-Apr-15 12:46pm

I use this code

Directory.CreateDirectory("D:\\ABC");
Directory.CreateDirectory("c:\\avi");
FileStream fs = new FileStream("c:\\avi\\a1.bat", FileMode.OpenOrCreate, FileAccess.ReadWrite);
StreamWriter sw = new StreamWriter(fs);
sw.Write ("Try Try But Don't Cry");
sw.Close();
fs.Close();

By using following code i m able to add string in the above file but i dont konw how to detect files for "But" word means which files contains this text.And delete that Word from file but dont know how

jk0391 6-Apr-15 13:29pm

sw.Write("Try Try But Don't Cry".Replace("But", ""));

Try that line, it removes But, or modify to your liking...

You can also store that string in a string variable and make the following procedure: if (variable.Contains("But")) {}

Member 11057488 6-Apr-15 13:38pm

thank you sir its helpful for me thank you again

Member 11057488 7-Apr-15 3:04am

its helpful sir bt it gives me the string Try Try But Don't Cry after using replace code it replace the Cry word by blank and give me output as Try Try But Don't CryTry Try Don't Cry.
But i want that the total string was replaced by new string which does not contained Cry how to do this i dont knw

Dave Kreskowiak 6-Apr-15 12:35pm

OK. Permission granted. Please, proceed!

You haven't asked a question at all and frankly, what you're describing makes little sense.

Member 11057488 6-Apr-15 12:41pm

I want to create an application on which first i have add one string like "Try Try But Don't Cry" i want to add this string to some files on my computer and then I want to check the files that contained the specific string or word which i mention then i want to delete "But" word from that string.

Dave Kreskowiak 6-Apr-15 14:15pm

Adding that to the content of a file can break the file! What you want to do makes no sense at all. Repeating what you put in your original post does not clarify anything.

WHY would you want to add a string to a file, thereby corrupting it?

Member 11057488 7-Apr-15 2:54am

i want to show that the file is currupt means it has virus infected then i run antivirus program that scan that file then after scanning it delete the single word or string from that means means the virus is clean

Member 11057488 7-Apr-15 3:24am

how to find the type of any file that it is a txt file or data file or doc file
Or how to split the extensions means i have a file QDC.SQL i want to split this means i want QDC seperate and SQL Seperate how to do this can any1 tell me plzz

PIEBALDconsult 6-Apr-15 12:42pm

To the name? Or to the content of the file?

Member 11057488 6-Apr-15 12:47pm

Content of the file

PIEBALDconsult 6-Apr-15 12:58pm

That's not a reasonable thing to do.

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Dave Kreskowiak · Accepted Answer · 2015-04-07T04:45:00

So you simulating a virus and a virus scanner? You couldn't say that in your original post?

Your simulation is quite naive. Viruses don't infect data files. They infect executable files.

With binary files, you cannot use a StreamReader/Writer as it tries to interpret everything as text. You have to use the FileStream and its methods to read/write the file, but now you're not looking for a text string but a stream of bytes that makes up your virus signature.