Like operator and dynamic linq

Question

I am using dynamic linq and was trying to implement contains logic...I need to return

Func<Expression, Expression, bool, MethodInfo, BinaryExpression>

sample code for equal

private static Func<Expression, Expression, bool, MethodInfo, BinaryExpression> GetFuncForOperand(OperatorType operand)
        {
      case OperatorType.Equal:
                    func = Expression.Equal;
                    break;
                case OperatorType.NotEqual:
                    func = Expression.NotEqual;
                    break;
case Operatortype.Like
//         what should I do
}

how can I express contains ?

I'm not sure I understand your existing code. Even the code you have doesn't remotely compile. That said, Contains logic would be implemented via a MethodCallExpression, not a BinaryExpression. — Jeff, May 24 '11 at 01:42
as Jeff pointed out you need a `MethodCallExpression` and an array to perform the `Contains` operation on, have a look at this SO thread for an example: http://stackoverflow.com/questions/278684/how-do-i-create-an-expression-tree-to-represent-string-containsterm-in-c — BrokenGlass, May 24 '11 at 01:50
I am still trying to wrap my head around expression concept. if some one can quickly code this would be great... I have to deliver something soon... — charvind, May 25 '11 at 01:07

score 0 · Answer 1 · answered Mar 01 '12 at 01:43

0

Have a look at my blog post, I made my own Like evaluator in c#, complete with unit test.

answered Mar 01 '12 at 01:43

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Like operator and dynamic linq

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