IQueryable.Where() suitable Expression in where?

Question

I\'m very low experienced with Expressions in .NET, that\'s why I rather ask you guys. How should I - see comment below:

using P = Myclass;
..
S         


        

Answer 1

.Where method takes a lambda expression as a parameter, so you need to build your BinaryExpression to a complete LambdaExpression.

var resultExpression = Expression.OrElse(myExp1, myExp2);   
   // now the exp is like: p > 100 || p < 10
ParameterExpression parameterExp = Expression.Parameter(typeof(P),"p");
   // construct a parameter with its type P, looks like: p =>
LambdaExpression lambdaExp = Expression.Lambda(resultExpression, parameterExp);
   // merge the two expressions:  p => p > 100 || p < 10
myList.Where(lambdaExp.Compile());