How to implement method with expression parameter c#

Question

I want to create a method like this:

var result = database.Search(x=>x.Name, \"Entity Name field value\");
result = database.Search

        

Answer 1

I can only think of this (with 2 generic arguments)

    public static IEnumerable Search(
        Expression> expression,
        TValue value
    )
    {
        return new List();
    }

usage

var result = Search(x => x.Id, 1);
var result2 = Search(x => x.Name, "The name");

you can replace TValue with object to avoid the second generic argument, but I would stick with this.

Btw. this works great in conjunction with this little helper

public static class ExpressionHelpers
{
    public static string MemberName(this Expression> expression)
    {
        var memberExpression = expression.Body as MemberExpression;
        if (memberExpression == null)
            throw new InvalidOperationException("Expression must be a member expression");

        return memberExpression.Member.Name;
    }
}

Now you can get the Name of the Property (Id oder Name) in this example by calling

var name = expression.MemberName();