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Hi,

I will need to do database queries in web service using input string as query parameters.

But I need different queries depends on the input string values:

e.g. input1, input2

if input2 is empty or null, then do query one,

if input 2 has value then do query two.

But I don't know how to evalue a string input is null or empty string or with value.

Can any one help?

Many thanks

Laura