Export txt file with all parameter values during the report execution

Question

Hello,
I've developed one report in Report Builder 3.0 , report server being  SRSS 2008 R2. This report has one report parameter named id_product. There are two data sets available. One data set  is for populating the report table.  In the second
data set I'm trying to export the id_product. The below query works fine only for single valued parameter id_product, this query being used in the second data set   Report pops-up an error when trying to run the report for multiple products at the same
time. I looked in SQL Profiler and it seems like inserting the parameter values in the global temporary table is not possible using the current code.
I'm aware of the VB Expression named Join but in such case I'm not sure if I can use it. It would be great if I can use this kind of expression. This way I would not create the data set anymore.  
Current query:
drop table ##SelectedValuescreate table ##SelectedValues(id_product nvarchar(max))insert into ##SelectedValues(@id_product) exec xp_cmdshell 'bcp "select ''id_product'' union all select * from ##SelectedValues" queryout "G:\Report\sqloutput.csv" -c -T -t'
Input: ProductId parameter values : 12, 16, 20
Desired output in csv:
id_product
12
16
20

Answer 1

Hi chopstix21,
Just as you thought, we can use join function to insert the values from a multiple value parameter to a temp table with VB Expression. After testing it in my own environment, we can refer to the following steps:
Create the second dataset using the query below:
drop table ##SelectedValues
create table ##SelectedValues(id_product nvarchar(max))
insert into ##SelectedValues(‘1’)
exec xp_cmdshell 'bcp "select ''id_product''
union all select * from ##SelectedValues" queryout "G:\Report\sqloutput.csv" -c -T -t'
Change the dataset using the expression like below:
="drop table ##SelectedValues"&
"create table ##SelectedValues(id_product nvarchar(max))" &
"insert into ##SelectedValues values (" & Join(Parameters! id_product.Value,"),(") &")" &
"select * from ##SelectedValues"
When we select 12, 16, 20 from parameter id_product, the second dataset will return 12, 16, 20 values as id_product field.
If there are any other questions, please feel free to ask.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support