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CSharp - Replace embedded Wildcard in String

Posted on February 2nd, 2006 by gernot.
Categories: CSharp.

A small method for replacing an embedded wildcard in a string.

simple example

String: [GG] is 24 [Y] old
[GG] should be replaced with Gernot Goluch and [Y] with year

usefull example

One possible usage would be including different IDs of xml elements or db entries in other entries by using wildcard delimiters in some content of the entry.

E.g. xml processing

‹testNode id=“123″›BlaBla‹/testNode›
‹testNode id=”456″›BlaBla and [123] is really dumb content‹/testNode›

After processing the content of testNode with id “456″ the content would be:
“BlaBla and Blabla is really dumb content”

Method Call

The method call for the simple example above.

replaceWildCardInString(“[GG] is 24 [Y] old”,new char[] {‘[', ']‘});

The Method

The method for the simple example above.

public string replaceWildCardInString(string _string, char[] _wildCard) {
  if (_string.IndexOf(_wildCard[0]) == -1) return _string;
  else {
    //split string and get content to replace
    string[] contentSplit = _string.Split(_wildCard);
    //What is inbetween the wildcards
    string contentToReplace = contentSplit[1];
    //The ‘real’ content
    //***Add Code here how to get the real content***
    //E.g.: very simple. Possible inclusion of db or xml query/method call
    string contentReplace = “”;
    if (contentToReplace.Equals(“GG”)) contentReplace = “Gernot Goluch”;
    else if (contentToReplace.Equals(“Y”)) contentReplace = “year”;
    //replace the wildcard with the ‘real’ content
    //and check if other wildcards are in the content
    WildCardClass wcc = new WildCardClass();
     return wcc.replaceWildCardInString(
        _string.Replace(
        _wildCard[0] + contentToReplace + _wildCard[1]
        , contentReplace)
        , _wildCard);
  }
}

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