Find Member from LambdaExpression - CSharp System.Reflection

CSharp examples for System.Reflection:Member

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Description

Find Member from LambdaExpression

Demo Code


using System.Reflection;
using System.Linq.Expressions;
using System;/*from w  ww .  j  ava2  s  .c om*/

public class Main{
        //public static string FindPropertyName(LambdaExpression lambdaExpression)
      //{
      //    return FindProperty(lambdaExpression).Name;
      //}

      public static MemberInfo FindMember(LambdaExpression lambdaExpression)
      {
         Expression expressionToCheck = lambdaExpression;

         bool done = false;

         while (!done)
         {
            switch (expressionToCheck.NodeType)
            {
               case ExpressionType.Convert:
                  expressionToCheck = ((UnaryExpression)expressionToCheck).Operand;
                  break;
               case ExpressionType.Lambda:
                  expressionToCheck = lambdaExpression.Body;
                  break;
               case ExpressionType.MemberAccess:
                  var propertyInfo = ((MemberExpression)expressionToCheck).Member;
                  return propertyInfo;
               case ExpressionType.Call:
                  return ((MethodCallExpression)expressionToCheck).Method;
               default:
                  done = true;
                  break;
            }
         }

         return null;
      }
}

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