how to store specific part of text from a .txt file in a string ?

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How can i store text from a text file in a string. i only want to store text between two self specified symbols..e.g
if txt file contains :

jhon upload_file # C:\Myfolder #

i only want to store text between the two # symbols i.e the string only stores
c:\Myfolder

thanks

Posted 31-Mar-12 21:04pm

Ghost_x

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3 solutions

Solution 1

Use the String.IndexOf function to get location of the # character.
Use the String.LastIndexOf function to get location of the last # character.
Then, just use String.SubString method[^] to get the characters in the middle set.

Posted 31-Mar-12 21:20pm

Abhinav S

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Clifford Nelson · Accepted Answer · 2012-03-31T21:36:00

the following should work:

C#

string strng = "dsksf#dfkfdsafl#dsfksa";
var s = strng.Substring(strng.IndexOf("#") + 1, strng.LastIndexOf("#") - strng.IndexOf("#") - 1);
var sw = new StreamWriter(@"C:\Users\clifford\Documents\text.txt");
sw.Write(s);
sw.Close();

Here I am assuming you want to store the string, not save the string, if you want to open a text file to get the string you can use the following:

C#

var sr = new StreamReader(@"C:\Users\clifford\Documents\text.txt");
var x = sr.ReadToEnd();
sr.Close();

Be careful with your words, store would be to disk.

Valery Possoz · Accepted Answer · 2012-03-31T23:48:00

Hi,

There's an alternative solution to Clifford's string slicing answer. You could use Regex to do this.
Regex is very powerful and is a very well suited at string manipulation.

In your case you could do it like this:

C#

string strng = "dsksf#dfkfdsafl#dsfksa";
Match match = Regex.Match(strng, "#.*#");
string result = match.Value.Substring(1, match.Value.Length - 2);

There are plenty on resources on Regex available:
http://msdn.microsoft.com/en-us/library/c75he57e.aspx[^]
http://www.regular-expressions.info/[^]

There are also a few online regex testers:
http://www.pagecolumn.com/tool/regtest.htm[^]

Valery.

how to store specific part of text from a .txt file in a string ?

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