Reporting services searching in long list parameters - sql-server-2008

Question

I have a question for You.
I need an idea to search items in long list of parameters in sql reporting services.
For example there is a houndred of values in list of parameters to select and i have to choose some of them. There exists problem with finding these values because list is too big.
Something searching by first couple letters would be great but probably it is impossible.
Now I really do not know how i could achieve smart method to find couple interested values from list of parameters.
Please help.

Answer 1

For your requirement, I have found an awesome article talking about this with detail solution:
Create a function in your database.
CREATE FUNCTION [dbo].[SplitParameterValues] (#InputString NVARCHAR(max), #SplitChar VARCHAR(5))
RETURNS #ValuesList TABLE
(
param NVARCHAR(255)
)
AS
BEGIN
DECLARE #ListValue NVARCHAR(max)
SET #InputString = #InputString + #SplitChar
WHILE #InputString!= #SplitChar
BEGIN
SELECT #ListValue = SUBSTRING(#InputString , 1, (CHARINDEX(#SplitChar, #InputString)-1))
IF (CHARINDEX(#SplitChar, #InputString) + len(#SplitChar))>(LEN(#InputString))
BEGIN
SET #InputString=#SplitChar
END
ELSE
BEGIN
SELECT #InputString = SUBSTRING(#InputString, (CHARINDEX(#SplitChar, #InputString) + len(#SplitChar)) , LEN(#InputString)-(CHARINDEX(#SplitChar, #InputString)+ len(#SplitChar)-1) )
END
INSERT INTO #ValuesList VALUES( #ListValue)
END
RETURN
END
Use a procedure the get the Available Values, refer to the query below:
create PROCEDURE sp (#keyword nvarchar(50))
AS
SELECT col
FROM table d
inner join (SELECT [param] FROM SplitParameterValues (#keyword,',')) s on d.col like (s.[param]+'%')
Then create a parameter for giving keywords. Then add another cascading parameter based on the key words. For detail steps, please read the source article from the link below:
[Forum FAQ]How do I add a search feature in the parameter with long drop down list?