Dynamic Connection String

How to give Dynamic Connection String in SSRS
http://www.bidn.com/blogs/KathiKellenberger/sql-server/3082/configure-ssrs-to-use-a-dynamic-connection-string

http://msdn.microsoft.com/en-us/library/ms166599.aspx

http://connectionstrings.com/sql-server-2008

http://msdn.microsoft.com/en-us/library/ms156450.aspx

http://www.codeproject.com/Articles/355461/Dynamically-Pointing-to-Shared-Data-Sources-on-SQL

Connection String Look like:

Data Source=localhost;Initial Catalog=org_MSCRM;Integrated Security=true

Credentials : Windows Credentials.