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SSRS Report - IIF Expression

Executing an expression I get an error message, can someone show me the correct syntax here?

=IIf(Fields!t_cpcp.Value ="310", "Purchased Material & Raw Material", Nothing)
=IIf(Fields!t_cpcp.Value ="320", "Manufacturing Direct Labor", Nothing)
=IIf(Fields!t_cpcp.Value ="325", "Subcontract Cost", Nothing)
=IIf(Fields!t_cpcp.Value ="330", "Engineering Direct Labor", Nothing)
=IIf(Fields!t_cpcp.Value ="340", "Manufacturing Labor O/H", Nothing)
=IIf(Fields!t_cpcp.Value ="345", "Engineering Labor O/H", Nothing)
=IIf(Fields!t_cpcp.Value ="350", "Material O/H", Nothing)
=IIf(Fields!t_cpcp.Value ="355", "Labor O/H Surcharge", Nothing)
=IIf(Fields!t_cpcp.Value ="360", "Subcontract Material Burden", Nothing)
=IIf(Fields!t_cpcp.Value ="MFD", "Manufactured Items", Nothing)
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2 answers

If you want all this to be in one expression, you can use the SWITCH statement:

=Switch(<condition>, <return value if true>, <next condition>, <return value if true>, ...)

The switch statement will return the value for the first condition, which is true. Using your example, you can try:

=Switch(Fields!t_cpcp.Value ="310", "Purchased Material & Raw Material",
        Fields!t_cpcp.Value ="320", "Manufacturing Direct Labor",
        Fields!t_cpcp.Value ="325", "Subcontract Cost",
        ...rest of them go here...)
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Another less elegant way would be to attach your IIF statements

=IIf(Fields!t_cpcp.Value ="310", "Purchased Material & Raw Material",IIf(Fields!t_cpcp.Value ="320", "Manufacturing Direct Labor",IIf(Fields!t_cpcp.Value ="325", "Subcontract Cost",IIf(Fields!t_cpcp.Value ="330", "Engineering Direct Labor",IIf(Fields!t_cpcp.Value ="340", "Manufacturing Labor O/H",IIf(Fields!t_cpcp.Value ="345", "Engineering Labor O/H",IIf(Fields!t_cpcp.Value ="350", "Material O/H",IIf(Fields!t_cpcp.Value ="355", "Labor O/H Surcharge",IIf(Fields!t_cpcp.Value ="360", "Subcontract Material Burden",IIf(Fields!t_cpcp.Value ="MFD", "Manufactured Items", Nothing))))))))))

You can also execute your logic in the query:

CASE t_cpcp WHEN '310' THEN 'Purchased Material & Raw Material'
            WHEN '320' THEN 'Manufacturing Direct Labor'
            WHEN  ...    THEN ....
            ELSE ''
END as t_cpcp_DESC
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