Talrace.Core.Predicates 8.0.0

About

This package provides a set of extension methods for combining delegates and lambda expressions with AND or OR conditions. The provided extension methods can be used to execute dynamic LINQ queries. This package can be used with EntityFramework to create dynamic database queries.

Available extension methods

And - extension method for Func<bool> type. Creates Func<bool> that represents a conditional AND operation between two Func<bool> operands.

And<T> - extension method for Func<T, bool> type. Creates Func<T, bool> that represents a conditional AND operation between two Func<T, bool> operands.

And<T, T2> - extension method for Func<T, T2, bool> type. Creates Func<T, T2, bool> that represents a conditional AND operation between two Func<T, T2, bool> operands.

And - extension method for Expression<Func<bool>> type. Creates Expression<Func<bool>> that represents a conditional AND operation between two Expression<Func<bool>> operands.

And<T> - extension method for Expression<Func<T, bool>> type. Creates Expression<Func<T, bool>> that represents a conditional AND operation between two Expression<Func<T, bool>> operands.

And<T, T2> - extension method for Expression<Func<T, T2, bool>> type. Creates Expression<Func<T, T2, bool>> that represents a conditional AND operation between two Expression<Func<T, T2, bool>> operands.

Or - extension method for Expression<Func<bool>> type. Creates Expression<Func<bool>> that represents a conditional OR operation between two Expression<Func<bool>> operands.

Or<T> - extension method for Expression<Func<T, bool>> type. Creates Expression<Func<T, bool>> that represents a conditional OR operation between two Expression<Func<T, bool>> operands.

Or<T, T2> - extension method for Expression<Func<T, T2, bool>> type. Creates Expression<Func<T, T2, bool>> that represents a conditional OR operation between two Expression<Func<T, T2, bool>> operands.

Sample

var list = Enumerable.Range(1, 1000);

Expression<Func<int, bool>> predicate = x => x >= 0;
predicate = predicate.And(x => x <= 2);
predicate = predicate.Or(x => x > 999).Or(x => x >= 20 && x <= 22);

var count = list.AsQueryable().Where(predicate).Count();
// count = 6;