Dunno Roland ... it sure looks like it should work (but I haven't used the IsDBNull() function). How about trying this intead:

IIf(MyDataRow("APN") = DBNull.Value, "", Trim(MyDataRow("APN"))

~~Bonnie

>Hi,
>
>I encountered the following error message with the code below the error message.
>
>An unhandled exception of type 'System.InvalidCastException' occurred in microsoft.visualbasic.dll
>Additional information: Cast from type 'DBNull' to type 'String' is not valid.
>
>MyEmailBody = myDataRow("AccountId") & " " & _
>myDataRow("OrderNumber") & " " & _
>IIf(IsDBNull(myDataRow("APN")), "", Trim(myDataRow("APN"))) & " " & _
>IIf(IsDBNull(myDataRow("StreetNumber")), "", Trim(myDataRow("StreetNumber")))
>
>What is the proper code to cancanate the string?
>
>Any help would be greatly appreciated.
>
>
>Thanks
>Roland