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c#.netlinqlambda
wierdo07
wierdo07

Reputation: 1

Extracting input arguments from Lambda expressions

I have method that accepts LambdaExpression as a parametar

    public void SomeMethod(Expression<Func<SomeObject, bool>> predicate)
    { }

inside this method I would like to extract the members and the arguments values from the expression Body. Is this possible and how can be achieved?

Method can be invoked like this:

    SomeMethod(t=> t.Id == 3 && t.Name=="Name");

or

    SomeMethod(t=> t.Id.Equals(3));

or

    SomeMethod(t=> t.Id > 3 || t.Id = 1);

etc. You get the point.

Upvotes: 0

Views: 1402

Answers (1)

Alexander
Alexander

Reputation: 1297

The solution you are looking for is called Expression Tree Visitor. By using it you can go though lambda expression members and arguments.

Also this walkthrough may be useful, it contains code for lambda expression partial evaluator in case arguments in lambda expression is not a constants

Upvotes: 2

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