public static void Main(string[] args)
{
var employees = new Employee[]
{
new Employee {
Id = 10, FirstName = "John", LastName = "Doe", Age = 25
},
new Employee {
Id = 20, FirstName = "Samantha", LastName = "Wells", Age = 35
},
new Employee {
Id = 30, FirstName = "Michel", LastName = "Jackson", Age = 45
},
};
var query = DynamicLinqCompiler.Compile <Func <IQueryable <string> > >(
"from e in $0 where e.Age > $1 select e.FirstName",
employees.AsQueryable(),
30);
foreach (var name in query())
{
Console.WriteLine(name);
}
// Should produce:
// Samantha
// Michel
}
public static DelegateT Compile <DelegateT>(string expr, params object[] args)
{
var c = new DynamicLinqCompiler(args);
using (var interp = new Interpreter <DynamicLinqCompiler>(c))
{
interp.LoggingKind = LoggingKind.ThrowOnError;
interp.Parse(expr);
return(Expression.Lambda <DelegateT>(c.Result, null).Compile());
}
}