如何创建类型为Expression.Lambda的Lambda表达式 <Action<Controller> &gt;？ 动态地

Question

I am trying to create a lambda expression of type Expression.Lambda<Action<Controller>> dynamically.

For instance: x => x.Index()

var body = ???
Expression<Action<Controller>> action = Expression.Lambda<Action<Controller>>(body);

I have the controller type (Type) and the controller action (MemberInfo).

Answer 1

If I understand your question correctly, you would do it using Expression.Call() . Something like:

Expression<Action<T>> CreateCallExpression<T>(MethodInfo method)
{
    var parameter = Expression.Parameter(typeof(T), "x");
    return Expression.Lambda<Action<T>>(
        Expression.Call(parameter, method), parameter);
}