Expression Tree Tutorial - Knowledge Base (KB)

Tree of Expressions

My understanding of expression tree is :...Expression trees are in-memory representation of expression like arithmetic or boolean expression.The expressions are stored into the parsed tree.so we can easily transalate into any other language....Linq to SQL...

Combine Expressions instead of using multiple queries in Entity Framework

I have following generic queryable (which may already have selections applied):...IQueryable<TEntity> queryable = DBSet<TEntity>.AsQueryable(); ...Then there is the ...Provider... class that looks like this:...public class Provider<TEntity> { public E...

C# 7.0 Value Tuple compile error?

When I am trying to compile the following code:...var post = iPostService.GetAll().Select(x => (x.Title, x.Author)); ...I get the compiler error: 'An expression tree may not contain a tuple literal.'...So I also tried this: ...var post = iPostService.GetA...

C# Expression Tree with Ignore Case or tolower

I want to create expression.Equal() with ignore case. Sample code:...if (!string.IsNullOrEmpty(request.BrandCode)) { MemberExpression me = Expression.Property(parmExpression, "BrandCode"); ConstantExpression constant = Expression.Constant(request...