[.net] String comparison using wildcards.
Author
Is it possible to sarch substrings of a string using wildcards, for example if i wanted to find out if a string contained "santa*. Rides" ?
This should help ya...
http://www.codeproject.com/string/wildcmp.asp?df=100&forumid=2130&exp=0&select=957461
theTroll
http://www.codeproject.com/string/wildcmp.asp?df=100&forumid=2130&exp=0&select=957461
theTroll
The quicker but also much more powerful way is to use RegEx - it's built in to the .NET framework and should have everything you need.
Try these articles, but feel free to ask for help with explanations, etc.
http://www.radsoftware.com.au/articles/regexsyntaxadvanced.aspx
http://www.radsoftware.com.au/articles/regexlearnsyntax.aspx
Hope it helps. :)
Try these articles, but feel free to ask for help with explanations, etc.
http://www.radsoftware.com.au/articles/regexsyntaxadvanced.aspx
http://www.radsoftware.com.au/articles/regexlearnsyntax.aspx
Hope it helps. :)
Look up the Regex class, and regular expression. If you're familiar with Perl's regex syntax, you'll pick it up quick.
Author
Answer to post #1:
Yeah i found that earlier but didn't like it so i wrote my own. This is for searching inside my own little database that i'm writing for a program. Might not be the most optimised but it's simple.
Post(s) 1+:
Thanks, i'll look into it :)
Yeah i found that earlier but didn't like it so i wrote my own. This is for searching inside my own little database that i'm writing for a program. Might not be the most optimised but it's simple.
public File[] Search(string searchPattern, bool ignoreCase, DatabaseSearchOptions searchOptions) { List<File> findList = new List<File>(); // We'll split up the searchPattern using the wildcards. string[] wildcards = { "*", "?" }; // Check the logic. if (ignoreCase) searchPattern = searchPattern.ToLower(); // Split up the search pattern using the wildcards. string[] comparers = searchPattern.Split(wildcards, StringSplitOptions.RemoveEmptyEntries); // We need it for the search logic. bool found; string checkAgainst; foreach (File file in fileList) { found = true; // Having a switch inside a loop isn't something that's recommended performance wise. switch (searchOptions) { case DatabaseSearchOptions.NameOnly: checkAgainst = file.Name; break; case DatabaseSearchOptions.PathOnly: checkAgainst = file.Path; break; case DatabaseSearchOptions.NameAndPath: checkAgainst = file.Path + "\\" + file.Name; break; default: checkAgainst = file.Name; break; } if (ignoreCase) checkAgainst = checkAgainst.ToLower(); // Compare the string against the comparers. foreach (string c in comparers) { // No occurence found. if (checkAgainst.IndexOf(c) == -1) { found = false; break; } } // We found a match. if (found) findList.Add(file); } return findList.ToArray(); }Post(s) 1+:
Thanks, i'll look into it :)
Regexes are the way to go. Any other solution will be a poor, partial regex implementation. Don't just look into it, use it.
One day Unixbeard had a problem. "I know, " he said, "I'll use regular expressions." Then Unixbeard had two problems.
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