Multiple value parameter only showing first value - sql

Question

I have an SQL Server stored procedure that I'm trying to make an SSRS report from. The sp has a parameter in it. The parameter works in SSRS when calling a single value. However, when calling both values, only the first one is returned.
Here's something important- The 'Active' field is a bit data type, so this is where the problem most likely lies.
ALTER PROCEDURE [dbo].[USP_RptRC]
#Active VARCHAR(1)
AS
BEGIN
SELECT [Funding]
,[4thChar]
,REPLACE([Description], CHAR(13) + CHAR(10), '') [Description]
,[Comments]
,CAST(Active AS VARCHAR(1)) Active
,[IsDeleted]
,[LastModifiedBy]
,[LastModifiedDate]
FROM [RC]
WHERE Active IN (#Active)
END

Answer 1

First your parameter is only a length of 1. Second, since you are using 'Where In' you will need to do a little extra work. I had the same issue in the past and this article helped me get it working.
https://munishbansal.wordpress.com/2008/12/29/passing-multi-value-parameter-in-stored-procedure-ssrs-report/

Answer 2

Since #Active is a VARCHAR(1), which could be a CHAR or INT if you are always using 1 or 0, you can only pass in one of the values. If you want the ability to return where Active is 1 or 0, then do this:
#Active VARCHAR(1) = NULL
AS
BEGIN
SELECT [Funding]
,[4thChar]
,REPLACE([Description], CHAR(13) + CHAR(10), '') [Description]
,[Comments]
,CAST(Active AS VARCHAR(1)) Active
,[IsDeleted]
,[LastModifiedBy]
,[LastModifiedDate]
FROM [RC]
WHERE #Active IS NULL or Active = #Active
Then in your SSRS report, just set the default value of your parameter to NULL, and/or in the Parameter settings, allow NULL values along with your explicit choices of 1 and 0. When NULL is selected, both 1 and 0 will be returned. Of course you can label the parameter choice in SSRS to "All" or "Inactive & Active" and pass NULL as the actual value.

Answer 3

T-SQL wise - '0,1' is not two values, it's one and in the context you use it it's one string value. But since your parameter length is limited (by you) to 1, the engine trims everything after the first character to convert '0,1' into '0'. If you pass '1,whatever' you'll get '1' in you stored procedure. That's way "only the first one is returned".
But since the #Active is bit you should declare it as bit. Then change your logic to include appropriate subset of records when you receive NULL for #Active, like so:
ALTER PROCEDURE [dbo].[USP_RptRC]
#Active VARCHAR(1)
AS
BEGIN
SELECT [Funding]
,[4thChar]
,REPLACE([Description], CHAR(13) + CHAR(10), '') [Description]
,[Comments]
,CAST(Active AS VARCHAR(1)) Active
,[IsDeleted]
,[LastModifiedBy]
,[LastModifiedDate]
FROM [RC]
WHERE 1 = CASE WHEN #Active IS NULL THEN 1 ELSE
CASE WHEN Active = #Active THEN 1 ELSE -1
END