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Using Operators
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What is this page about?
This page explains how to use template operators supported by the LINQ Reporting Engine.
The following table contains predefined and user-defined operators that LINQ Reporting Engine enables you to use in template expressions.
| Primary | x.y x?.y f(x) a[x] a?[x] new |
| Unary | - ! ~ (T)x |
| Binary | * / % + - << >> < > <= >= == != & ^ | && | | ?? |
| Ternary | ?: |
The engine follows operator precedence, associativity, and overload resolution rules declared at C# Language Specification 5.0 while evaluating template expressions. But be aware of the following limitations in the behavior comparing with the specification:
- Implicit user-defined conversions are supported only when specified explicitly.
- The indexing of multi-dimensional arrays is not supported.
- Whereas the object initializer syntax is supported (including objects of anonymous types), the collection initializer syntax is not.
Also, the engine enables you to use lifted operators in template expressions.
FAQ
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Q: Which operators are available for use in LINQ Reporting Engine template expressions?
A: The engine supports primary operators (x.y,x?.y,f(x),a[x],a?[x],new), unary operators (-,!,~,(T)x), binary operators (*,/,%,+,-,<<,>>,<,>,<=,>=,==,!=,&,^,|,&&,||,??), and the ternary conditional operator (?:). Custom user‑defined operators can also be used if they are defined in the data model. -
Q: Can I use the null‑conditional operator (
?.) inside a template expression?
A: Yes, the null‑conditional operator is part of the primary operators supported by the engine, allowing safe navigation of potentially null objects in expressions. -
Q: Are implicit user‑defined conversions applied automatically in template expressions?
A: No. Implicit user‑defined conversions are only applied when you explicitly cast the value in the expression. The engine does not perform automatic implicit conversions. -
Q: Is collection initializer syntax (e.g.,
new List<int>{1,2,3}) supported in template expressions?
A: No. While object initializer syntax is supported (including anonymous types), collection initializer syntax is not recognized by the LINQ Reporting Engine. -
Q: How does the engine handle indexing of multi‑dimensional arrays?
A: Indexing of multi‑dimensional arrays is not supported. You can only index single‑dimensional arrays or collections that expose an indexer.