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Regex : regular expression problem

Jac
Hey,

I have following string :

blabla {\*\bkmkstart test1}{\*\bkmkend test1} line1 {\*\bkmkstart
test2}{\*\bkmkend test2}

I want to change the string to the following with regex.
blabla &test1& line1 &test2&

I do the following :
strTemplate = Regex.Replace(strTemplate,@"{\\[*]\\bkmkstart ","&");
strTemplate = Regex.Replace(strTemplate,@"}{\\[*]\\bkmkend.*}","&");
The result after the first replace is (correct) :
blabla & test1}{\*\bkmkend test1} line1 & test2}{\*\bkmkend test2}

After the second replace :
blabla & test1&

I loose the rest of the string. I think there is a problem with the last }
in my expression.
I want to replace exactly this string "}{\\[*]\\bkmkend.*}" not less not
more. } is the last character of my string.
May be it is .* how gives me problems, but .* has to stop after the first }
he see.

How can I resolute this problem.
thanks for help.

Nov 17 '05 #1
2 1498
Jac
I found it :

strTemplate = Regex.Replace(strTemplate,@"}{\\[*]\\bkmkend.*?}","&");

Use of the ? : but can somebody explain this ?. What is the purpose in that
expression

thanks

"Jac" wrote:
Hey,

I have following string :

blabla {\*\bkmkstart test1}{\*\bkmkend test1} line1 {\*\bkmkstart
test2}{\*\bkmkend test2}

I want to change the string to the following with regex.
blabla &test1& line1 &test2&

I do the following :
strTemplate = Regex.Replace(strTemplate,@"{\\[*]\\bkmkstart ","&");
strTemplate = Regex.Replace(strTemplate,@"}{\\[*]\\bkmkend.*}","&");
The result after the first replace is (correct) :
blabla & test1}{\*\bkmkend test1} line1 & test2}{\*\bkmkend test2}

After the second replace :
blabla & test1&

I loose the rest of the string. I think there is a problem with the last }
in my expression.
I want to replace exactly this string "}{\\[*]\\bkmkend.*}" not less not
more. } is the last character of my string.
May be it is .* how gives me problems, but .* has to stop after the first }
he see.

How can I resolute this problem.
thanks for help.

Nov 17 '05 #2
Hi Jac,

*? means as few repeats as possible.
..*} matches all until the last }
..*?} matches all until the next } (supposing that '}' is the last char of
the pattern).

"Jac" <Ja*@discussions.microsoft.com> schrieb im Newsbeitrag
news:29**********************************@microsof t.com...
I found it :

strTemplate = Regex.Replace(strTemplate,@"}{\\[*]\\bkmkend.*?}","&");

Use of the ? : but can somebody explain this ?. What is the purpose in
that
expression

thanks

"Jac" wrote:
Hey,

I have following string :

blabla {\*\bkmkstart test1}{\*\bkmkend test1} line1 {\*\bkmkstart
test2}{\*\bkmkend test2}

I want to change the string to the following with regex.
blabla &test1& line1 &test2&

I do the following :
strTemplate = Regex.Replace(strTemplate,@"{\\[*]\\bkmkstart ","&");
strTemplate = Regex.Replace(strTemplate,@"}{\\[*]\\bkmkend.*}","&");
The result after the first replace is (correct) :
blabla & test1}{\*\bkmkend test1} line1 & test2}{\*\bkmkend test2}

After the second replace :
blabla & test1&

I loose the rest of the string. I think there is a problem with the
last }
in my expression.
I want to replace exactly this string "}{\\[*]\\bkmkend.*}" not less not
more. } is the last character of my string.
May be it is .* how gives me problems, but .* has to stop after the
first }
he see.

How can I resolute this problem.
thanks for help.

Nov 17 '05 #3

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