dynamic join in linq 0 c#

Question

   var query = from C in db.clients
    join O in db.orders on c.clientid equals O.clientid
    join P in db.products on O.productid equals P.productid
    select ne         


        

Answer 1

Another method:

Expression> clientWhere = c => true;
Expression> orderWhere = o => true;
Expression> productWhere = p => true;

if (filterByClient)
{
    clientWhere = c => c.ClientID == searchForClientID;
}

if (filterByProductName)
{
    productName = p => p.ProductName == searchForProductNameString;
}

// other filter cases

var query = from C in db.clients.Where(clientWhere)
    join O in db.orders.Where(orderWhere) on c.clientid equals O.clientid
    join P in db.products.Where(productWhere) on O.productid equals P.productid
    select new {C,O};