SSRS filter a dataset if parameter is "Yes"

Question

hello i have a report  as below
with date Parameters this all works fine! 
date from                date too 
01/01/2011   21/02/2013 
name        amount      date 
test1 100
          01/01/2012
test2        200             01/02/2013 
but what i want is to have another parameter which says something like yes or no and a filter on the data set which responds to the parameter
so that if the parameter = "yes" then filter the data set so as "not" too include test1 as a company but if "NO" then include all records! 
Steve mason

Answer 1

Add new parameter in SSRS report and pass it down to query .
In the query add a filter like below
WHERE....
AND (name <> 'test1' OR @NewParameter = 'No')
or if you want to do this in SSRS dataset do like below
=IIF(Parameters!NewParameter.Value="Yes",Fields!Name.Value,0) for Expression
<> for operator
and
=IIF(Parameters!NewParameter.Value="Yes","test1",1) for Value
in dataset filter tab as per below
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