Question

I have the following C# which simply replaces parts of the input string that look like EQUIP:19d005 into URLs, like this:

input = Regex.Replace(input, @'(EQUIP:)(\S+)', @'<a title=''View equipment item $2'' href=''/EquipmentDisplay.asp?eqnum=$2''>$1$2</a>', RegexOptions.IgnoreCase); 

The HTML ends up looking like this.

<a title='View equipment item 19d005' href='/EquipmentDisplay.asp?eqnum=19d005'>EQUIP:19d005</a> 

The only trouble is that the destination page expects the eqnum querystring to be all UPPERCASE so it returns the correct equipment when eqnum=19D005 but fails if it receives eqnum=19d005.

I guess I can modify and correct EquipmentDisplay.asp’s errant requirement of uppercase values however, if possible I’d like to make the C# code comply with the existing classic ASP page by uppercasing the $2 in the Regex.Replace statement above.

Ideally, I’d like the HTML returned to look like this:

<a title='View equipment item 19d005' href='/EquipmentDisplay.asp?eqnum=19D005'>EQUIP:19d005</a> 

Notice although the original string was EQUIP:19d005 (lowercase), only the eqnum= value is uppercased.

Can it be done and if so, what’s the tidiest way to do it?

Answer 1

OK, 2 solutions, one inline:

input = Regex.Replace(input, @'(EQUIP:)(\S+)', m => string.Format(@'<a title=''View equipment item {1}'' href=''/EquipmentDisplay.asp?eqnum={2}''>{0}{1}</a>', m.Groups[1].Value, m.Groups[2].Value, m.Groups[2].Value.ToUpper()), RegexOptions.IgnoreCase); 

The other using a separate function:

var input = Regex.Replace(input, @'(EQUIP:)(\S+)', Evaluator, RegexOptions.IgnoreCase);  private static string Evaluator(Match match) {     return string.Format(@'<a title=''View equipment item {1}'' href=''/EquipmentDisplay.asp?eqnum={2}''>{0}{1}</a>', match.Groups[1].Value, match.Groups[2].Value, match.Groups[2].Value.ToUpper()); }