Hi All
I encountered a rather strange experience while implementing "Regular
Expression Extractor".
I needed to extract "0" from the "<option value="0">" in the "<select
name="ctl00$ContentPlaceHolder1$ddlDivision"
id="ctl00_ContentPlaceHolder1_ddlDivision" tabindex="6"
class="clsESDropDownNormal">\r\n <option value="0">-Select-</option>"
Here I was passing the "-Select-" from a CSV file. So I replaced "-Select-"
with "${Param_ddlDivision}" and escaped "$" (\$) in the two occurrences.
Now the Regular Expression is:
<select name="ctl00\$ContentPlaceHolder1\$ddlDivision"
id="ctl00_ContentPlaceHolder1_ddlDivision" tabindex="6"
class="clsESDropDownNormal">\r\n <option
value="(.+)">${Param_ddlDivision}</option>
But this did not fetch me the value "0". Then after many trial and error
efforts I found out that for escaping the "$" I had to use two "\".
Now the Regular Expression is:
<select name="ctl00\\$ContentPlaceHolder1\\$ddlDivision"
id="ctl00_ContentPlaceHolder1_ddlDivision" tabindex="6"
class="clsESDropDownNormal">\r\n <option
value="(.+)">${Param_ddlDivision}</option>
This happens when I am parameterizing the "-Select-" (using
"${Param_ddlDivision}" instead of "-Select-"). If "-Select-" is used
directly, only one "\" is neededfor "$".
It will be really helpful if someone could explain why two "\" is needed?
While Googling I read after parsing "\\" is equivalent to an escaped "\"!!!
I got the solution for my RegEx. But I am totally confused about this two
"\".
And is there any other scenario where this particular situation has occurred
to anyone?
Regards
VS
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