Dynamic LINQ Overview

Database applications often rely on Dynamic SQL queries that are constructed at run-time through program logic. The LINQ infrastructure supports similar capabilities through expression trees, which are an appropriate abstraction for a variety of scenarios, but for others, a string-based representation may be more convenient.

• The dynamic query library relies on a simple expression language for formulating expressions and queries in strings.
• It provides you with string-based extension methods that you can pass any string expression into instead of using language operators or type-safe lambda extension methods.
• It is simple and easy to use and is particularly useful in scenarios where queries are entirely dynamic, and you want to provide an end-user UI to help build them.

Using this Dynamic LINQ library, we can do the following:

• Dynamic string-based querying through LINQ providers.
• Dynamic parsing of strings to produce expression trees such as ParseLambda and Parse methods.
• Dynamic creation of Data Classes using the CreateType method.