ssrs用户在参数中键入多个值或将其留空

Question

I am creating a report in SSRS and have a parameter for the end users to search for an account number. Within the report the parameter is set to null by default to show all accounts. When the parameter is not null the user should be able to type in a single account or multiple accounts separated by commas. My problem is when I try to type in multiple accounts I get this error:

"An expression of non-boolean type specified in a context where a condition is expected, near ','."

Here is my sql query:

SELECT * FROM test_db WHERE (AccountNumber IN (@Account)) OR (@Account IS NULL)

The code on the parameter for @Account is

=IIF(IsNothing(Parameters!Account.Value),Parameters!Account.Value,Split(Parameters!Account.Value,","))

Answer 1

You don't need to do anything with it. If you make the @Account parameter multi-value, you can simply type each entry followed by [Enter], no commas, just your required value, one on each row of the parameter drop down.

Then your original query will work, SSRS will automatically convert the multi-value list into a comma separated list and inject it into your SQL. If this doesn't make sense, let me know and I'll put a complete answer with some images. You may need to change you query to

SELECT * 
    FROM test_db 
    WHERE AccountNumber IN (@Account) 
        OR ISNULL(@Account, '' ) = ''

This will take care of blanks too. So blanks/Null should return everything