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SQL Where Like filter to show all when empty

I have a SQL command to display some recoreds in a GridView.
The view is filtered on the SQL command below:
SelectCommand="SELECT * FROM [ProductIncluded] WHERE ([GFMerchantProductName] LIKE '%' + @GFProductName2 + '%')">
Which works well when I populate @GFProductName2 with a value, however I would like to show all records if the @GFProductName2 is left blank, whereas it returns no records. How would I do this in the same SQL statement rather than a new SQLcommand for when @GFProductName2 is left blank.
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Simon Cripps
Asked:
Simon Cripps
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1 Solution
 
Aneesh RetnakaranDatabase AdministratorCommented:
Hello Crippsy,


SelectCommand=" SELECT * FROM [ProductIncluded] WHERE (  ISNULL(@GFProductName2,'') = '' OR    [GFMerchantProductName] LIKE '%' + @GFProductName2 + '% ')">


Regards,

Aneesh
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Simon CrippsAuthor Commented:
Thanks this works fine when running a standalone SQL query. however is not working against the gridview. I suspect that @GFProductName2 is not returning a NULL value despite being empty, I have tried trim, do you know a method to set to null if empty.
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js-profiCommented:
simply add    or GFProductName2 is null       to where clause
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Simon CrippsAuthor Commented:
Does the job for the command.
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