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Editorial Team
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Asked: 2026-06-08T20:56:24+00:00

When I do the following I get a message saying Expression Expected If (Not

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When I do the following I get a message saying Expression Expected

     If (Not (String.IsNullOrEmpty(e.Item.DataItem("DueDate")) && String.IsNullOrEmpty(e.Item.DataItem("ActualDate"))) ) Then


     End If
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1 Answer

  1. Editorial Team

    If this is VB.NET then the AND operator is AndAlso

    AndAlso and it’s brother OrElse are better because:

    • Avoids executing part of a logical expression to avoid problems.
    • Code optimization by not executing any more of a compound expression
      than required

    So your code should be 

    If (Not (String.IsNullOrEmpty(e.Item.DataItem("DueDate")) AndAlso String.IsNullOrEmpty(e.Item.DataItem("ActualDate"))) ) Then 

    .... 
End If
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