More regex questions

[Trev]

Hi everyone,
I'm developing some code that will hopefully match one of the strings
stored in an array:

String [] attrTypes = {"/SCEQUIPMENT/", "/SCOINSTRUMENT/", "/SCPLIN/",
"/SCHVAC/", "/SCCAB/", "^(/EQUIPMENT/)", "/PIPE/", "^(/HVAC/)"};

for (int i=0; i<8; i++)
{
Match m = Regex.Match( args[0].ToString(), attrTypes );
// args[0] is an input string and contains (eg)
"SCEQUIPMENT (unfiltered)" etc.

if (m.Success)
{

but I never reach any of the code after m.Success. Can anyone please
suggest a solution?

TIA

Trev

 

[Oliver Sturm]

Hello Trev,

I'm developing some code that will hopefully match one of the strings
stored in an array:

<snip>

The major problem here is that you seem to have copied the regular
expressions from Perl... the /.../ syntax is common there, for a variety
of reasons, but is not needed in C# (or .NET, for that matter). Get rid of
all the / characters in your expressions and you should see something
happening.


Oliver Sturm

 

[Trev]

Hello Trev,


<snip>

The major problem here is that you seem to have copied the regular
expressions from Perl... the /.../ syntax is common there, for a variety
of reasons, but is not needed in C# (or .NET, for that matter). Get rid of
all the / characters in your expressions and you should see something
happening.

Thanks for your help Oliver, I really appreciate it (sorry I haven't
replied sooner, I have been on vacation): I admit that I started using
regex with Perl so the syntax must have stuck in my mind.

Just one more question: how do I only match to words at the start of a
line? So that
"EQUIPMENT" will only match with "EQUIPMENT (unfiltered)" but not
"GASKET for EQUIPMENT", "SCEQUIPMENT (unfiltered)" or "GASKET for
SCEQUIPMENT"

- I'm finding that a match is done anywhere in the string, but I can't
figure out how to just match at the start!

TIA

Trev

 

[Oliver Sturm]

Hello Trev,

Just one more question: how do I only match to words at the start of a
line? So that
"EQUIPMENT" will only match with "EQUIPMENT (unfiltered)" but not
"GASKET for EQUIPMENT", "SCEQUIPMENT (unfiltered)" or "GASKET for
SCEQUIPMENT"

Use ^EQUIPMENT to match only at the start of the line (or the string,
rather).


Oliver Sturm

 

[Rad [Visual C# MVP]]

Use ^EQUIPMENT to match only at the start of the line (or the string,
rather).

Oliver Sturm

And be sure to set the appropriate regex option. Given

EQUIPMENT
EQUIPMENT

If your regex option includes RegexOptions.Multiline it will match twice.
Otherwise it will match only once