variable class property[Answered] RSS

• • Reply
  mylok

  Member

  297 Points

  178 Posts

  variable class property

  Jun 27, 2014 01:55 PM|mylok|LINK

  I have class1 with proporty p1p, p2p, p3p....p10001p...ect

  now depend on pass parameter n (it is integer) I need to access class1.pnp

  is there anyway to do that?

• • Reply
  Rion William...

  All-Star

  114593 Points

  18503 Posts

  MVP

  Re: variable class property

  Jun 27, 2014 03:13 PM|Rion Williams|LINK

  You may be able to access it via Reflection as mentioned in this similar Stack Overflow discussion :

  public static object GetPropValue(object src, string propName)
  {
       return src.GetType().GetProperty(propName).GetValue(src, null);
  }

  You could expand it to something like the following :

  public class YourClass
  {
          public int Property1 { get; set; }
          public int Property2 { get; set; }
          public int Property3 { get; set; }
  
          public int GetPropertyByInteger(int n)
          {
              // Build your property name here
              var propertyName = String.Format("p{0}p", n);
  
              return Convert.ToInt32(this.GetType().GetProperty(propertyName).GetValue(this, null));
          }
  }

  which would allow you to reference your property by just passing in the index you needed :

  var property3 = YourClass.GetPropertyByInteger(3);

  • Working Example

  Another solution would be to write a custom indexer that is similar to the above method (and still uses Reflection) and set it on your class :

  public class YourClass
  {
          public int p1p { get; set; }
          public int p2p { get; set; }
          public int p3p { get; set; }
  
          public int this[int n]
          {
              get
              {
                  return Convert.ToInt32(this.GetType().GetProperty(String.Format("p{0}p",n)).GetValue(this, null));
              }
          }
  }

  which would allow you to reference your properties via :

  // Access your class via a property name
  int property1 = yourClass[1];

  • Working Example

  Blog | Twitter | Stack Overflow | LinkedIn