I want to pass an empty string parameter in a url. I don't know how to do it.
I am passing these parameters in the url for a grid. In the database if I using Race=''. I get the respective records. I need to pass this in the url
test.aspx?race=""
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3 Answers
The url would look like this:
text.aspx?race=
or
text.aspx?race=&otherParam=value&etc=otherValue
Then you would have code to handle race being empty:
if(string.IsNullOrEmpty(Request.QueryString["race"]))
// handle the empty race differently
1 Comment
Andrew
Modsecurity will not like this. It wants to see something between = and &, or it will flag it as an attack attempt.
You can pass an empty string in url like this
test.aspx?race=%02%03
%02 - start of text ASCII Character
%03 - end of text ASCII Character
In this page you can find other characters too.
1 Comment
ToolmakerSteve
Interesting. However, AFAIK, URL spec does not define any special behavior for those two characters. Your linked page says "Control characters have nothing to do inside a URL." Given that, I see only two possibities: a) those characters are discarded from the value, in which case this is "overkill"; why not just use earlier answer
test.aspx?race=? OR b) those characters are included w/i the value, in which case you would need special logic to look for that string of two characters - seems undesireable. I have not tested, but I believe "(b)" is what happens.Dim race As String
race = ""
Response.Redirect("page.aspx?race=" & race)
Is this what you want??
2 Comments
user2498657
I am trying to pull out records from the data base where the field race is blank (Select * from tbltest where race=''). I want to know how will I pass the balnk parameter in a query.string or URL to a grid
Brilliand
It kind of does answer the question, though it's a bit vague about it - the correct answer is that the URL should be
text.aspx?race=.