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What is the syntax we can use for expressions (e.g., for the VisibleExpression property)?

By default, Document Creator follows the C# syntax for expressions (you can also switch to VisualBasic.NET syntax via the Report Options window, under the Script tab). Here are some examples of expressions in the default C# syntax:

Syntax Expression Example Explanation 
[number] == 0
 
[SalesLine.LineAmount] == 0
 Line amount EQUAL TO 0 
[number] != 0
 
[SalesLine.LineAmount] != 0
 Line amount NOT EQUAL TO 0 
[textvariable] != ""
 
[InvHdr.YourReference] != ""
 "Your Reference" field of Invoice header NOT EQUAL TO empty 
![boolean]
 
![SalesHeader.ShowLotSN]
 NOT Show Lot-/Serial nos. (Negation) 
[expr1] && [expr2]
 
([SalesLine.TypeNo] != 0) && ([SalesLine.TypeNo] != 3)
 Line type not equal to 0 AND Line type not equal to 3 
[expr1] || [expr2]
 
([SalesLine.TypeNo] == 0) || ([SalesLine.TypeNo] == 3)
 Line type equal to 0 OR Line type equal to 3 
[number] >= 0
 
[SalesLine.Amount] >= 0
 Line amount GREATER THAN OR EQUAL TO 0 
[number] <= 0
 
[SalesLine.Amount] <= 0
 Line amount LESS THAN OR EQUAL TO 0 
[datevar] != default(DateTime)
 
[SalesHdr.DueDate] != default(DateTime)
 Date has been entered (date <> 0D) 
[textvar].StartsWith("Hello")
 
[InvHdr.FieldName].StartsWith("Hello")
 Text field STARTS WITH text "Hello" (similarly you can use: Contains and EndsWith) 
[Blob] != null && [Blob].Length > 0
 
[InvLine.ItemPicture] != null && [InvLine.ItemPicture].Length > 0
 Blob/Byte-array is filled

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