Hi
I have three parameter in my report which are following.

Name
FatherName
BatchNo

Now user can only search by one paramter at a time.
for example by Name , or by fathername or by batch no.

please tell me how to do it.

Are these dynamic parameters? If they're not, then this is fairly easy:

1. Create a parameter that I'll call "Search Type". This will have a list of static values - Name, FatherName, BatchNo.

2. Create another parameter that I'll call "Search Value". This is where the user will enter the value for the search.

3. In the Select Expert, do something like this (the parentheses are important here!):

(
({?Search Type} = 'Name' and {table.NameField} = {?Search Value}) or
({?Search Type} = 'FatherName' and {table.FatherNameField} = {?Search Value}) or
({?Search Type} = 'BatchNo' and {table.BatchNoField} = {?Search Value})
)

-Dell

You'll do something similar to what I outlined above, only you'll add a second "value" parameter and make it optional. If a user selects just "Name" and enters something in the second value parameter, you'll just ignore it.

-Dell