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Hi guys, i am reading text from a text file and searching a pattern and replacing through regular expression. I am wondering how can i write to spceified line meanwhile i am reading from a textfile. basically if there is a match found in the entire file i want to replace the string and store in the file permenantly. Is a best way to do.
Your help would be appreciated.
Thanks
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File.ReadAllText + Regex.Replace + File.WriteAllText ? 
Luc Pattyn
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Files are not line based, so you can't replace a line in a file.
In the odd case that the text you are replacing has the exact byte length when encoded as the text you are replacing it with, it would be possible to replace those bytes in the file. Otherwise you just have to read the whole file in, do the replacement, and write it all back to the file.
---
Year happy = new Year(2007);
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Dear brothers
I need to have a listview like Madhu Raykar's but i can add more items to it by clicking a mouse, i mean how i catch the mouse event click for empty items ??
I hope I'm clear and plz provide me with answer ASAP 
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you mean like through a context menu???
...btw, the following is my signature. Not a code snippet
-- modified at 18:20 Monday 29th January, 2007
(Nyquist Rate || ! Nyquist Rate)
{
Console.WriteLine("That is the question");
}//Go Colts
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I have a file that has informatin separated by (;) as follow
colors;serverName1;size;location
colors;serverName1;size;location
colors;serverName1;size;location
I want to read the servername (after the fist and last ";" )
any ideas how to do this?
thank you in advanced
PS
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You can determine the index of the semicolons using the String.IndexOf method and then retrieve the server name by using the String.Substring method.
Alternatively, you can split the string using the String.Split method and the semicolon as delimiter and access the proper item of the returned array.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook www.troschuetz.de
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String.Split is your friend.
Luc Pattyn
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for the following:
float x = (38.40f * 1000.0f) - 32435.0f;
I get x = 5965.00146.
Surely floats are more accurate than this, or is there a problem I'm not seeing?
John Acton
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No this is normal behavior for floats; their size is 32-bit, of which they use about 24 bits
for their mantissa, which amounts to about 7 decimal digits.
If you want more precision, use double; their size is 64-bit, the mantissa uses about 56 bits,
they can hold about 16 decimal digits.
If memory efficiency is important, you may want to store floats, but do intermediate calculations
with doubles.
If your application is financial (or anything else with a limited maximum value, that
requires accurate fractional digits) consider the decimal type.
BTW similar considerations exist in whatever programming language you choose...
Luc Pattyn
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Thanks for your help.
John Acton
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I have table1 which has the columns:
A,B,C,D,E
I have table2 which has the columns:
E,F
My end result is that I want to only export the data from table1 - Column E
I could go through a foreach loop for each row on table1 and if it exists on table2, then write it out, but is there a quicker way to do this ?
Thank you
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Where are the tables ? You can get the list of items using a simple SQL statement.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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The columns we are interested in are from a schema file, which is dumped into a datatable and these are the columns we need.
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Is there an equivelant to the VB #import?
Don't be overcome by evil, but overcome evil with good
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What does #import do ?
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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sorry about that its the "imports" command. What i have is a class with a bunch of static methods. What i normally would do is something like this: ClassOne.MethodOne. Someone told me in VB you could use an "imports" command to import the entire class so you could just call the methods themselves without typing in the class name. Is there something like that out there like that for C#?
Don't be overcome by evil, but overcome evil with good
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No, that really sucks, and C# doesn't do it, AFAIK.
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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I must admit that I learned #import in C/C++ only. The equivalent in VB.NET is Imports, and the c# equivalent is using.
the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer
Deja View - the feeling that you've seen this post before.
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In VB you are able to import a class instead of just a namespace. is there any way to do this in C#? I tried to import a class and it won't let me.
Don't be overcome by evil, but overcome evil with good
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now why in the world would you want to "import" a class instead of a namespace?? That would make all of the fields of the "imported" class fields of the "importing" class. ...What you are describing is inheritance. Look here http://msdn.microsoft.com/library/en-us/vbls7/html/vbSpecStart.asp
Allowing what you are requesting would break object oriented design
(Nyquist Rate || ! Nyquist Rate)
{
Console.WriteLine("That is the question");
}
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You can apply 'using' to a class if you use an alias:
e.g.,
using filealias = System.IO.File;
David Anton
www.tangiblesoftwaresolutions.com
Instant C#: VB to C# converter
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