Using Extension Methods

LINQ Reporting Engine enables you to use the following built-in extension methods in template expressions:

• Extension methods mimicking the ones for IEnumerable<T> (see “Appendix A. Enumeration Extension Methods” for more information)
• Extension methods for iteration variables (see “Using Extension Methods of Iteration Variables” for more information)

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FAQ

1. Q: How do I call an extension method inside a LINQ Reporting Engine template?
   A: Use the standard tag syntax and place the method after the variable, e.g., <<item.Where(p => p.Age > 30)>>. The engine resolves the method at runtime and returns the filtered collection.

2. Q: Which enumeration‑style extension methods are available by default?
   A: Methods that exist on IEnumerable<T> such as Where, Select, OrderBy, Take, Skip, Count, and Any are provided out‑of‑the‑box for use in template expressions.

3. Q: Can I use extension methods on the iteration variable itself (e.g., the index of a foreach loop)?
   A: Yes. The engine supplies helpers like Index, IsFirst, IsLast, and IsEven that can be called directly on the iteration variable, for example <<item.IsFirst>>.

4. Q: Is it possible to add my own custom extension methods for use in Java templates?
   A: Custom extension methods are not supported in the template language. Only the built‑in methods listed in the documentation can be used.

5. Q: Are the same extension methods available when using Aspose.Words for .NET or other platforms?
   A: The set of built‑in extension methods is consistent across platforms, but the exact syntax may differ (e.g., C# uses {{ }} while Java uses << >>). Refer to the platform‑specific documentation for details.