How to iterate over numerically named object properties

So I have a horribly designed class that I can't change that has properties like this:

object.Color1
object.Color2
object.Color3

etc...

How can I iterate through those with a for loop. In other words, something like this:

for (int i = 0; i <= 40; i++)
{
   string PropertyName = "Color" + i;

   if (object.PropertyName != "") 
   { 
       // do something
   }
}

Obviously this code wouldn't work but it gives you an idea of what I'm after. I have to do some processing on each property and I don't want to repeat my code 40 times. :) A loop would be perfect, I'm just not sure how to create the name of the property on the fly.

EDIT: Ok so I've tried the following code:

for (int i = 1; i <= 20; i++ )
            {
                var type = pendingProduct.GetType();

                var colorProperty = type.GetProperty("Color" + i);
             开发者_JAVA百科   string colorValue = colorProperty.GetValue(type, null).ToString();

                var colorSkuProperty = type.GetProperty("Color" + i + "SKU");
                string colorSkuValue = colorSkuProperty.GetValue(type, null).ToString();

                if (String.IsNullOrEmpty(colorValue)) continue;

                ProductColor color = new ProductColor {Color = colorValue, ProductSizes = productSizes};
                if (!String.IsNullOrEmpty(colorSkuValue)) color.SKU = colorSkuValue;
            }

I'm getting an error "Object does not match target type" on this line:

string colorValue = colorProperty.GetValue(type, null).ToString();

Am I doing something wrong here?

You're looking for reflection:

PropertyInfo property = typeof(SomeType).GetProperty("Color" + i);
string value = (string)property.GetValue(obj, null);

Note that this will be slow.
If you do it many times, you can make it faster by caching Delegate.CreateDelegate(..., property.GetGetMethod()) in an array.

You can use reflection for that:

var type = myObject.GetType();
var property = type.GetProperty("Color1");
var value = property.GetValue(myObject, null));

This is how i do to help finding.

$abc = array(
 'a' => 'world',
 'b' => 'good',
);

$object = (object) $abc;

foreach($object as $k) 
{
  var_dump($object);
}

You can use reflection to get the property by name. In your example you can use:

var pi = obj.GetType().GetProperty(PropertyName);
var val = pi.GetValue(obj,null);

In order to obtain the value of the property which name is PropertyName. You should check for pi != null because if a requested property does not exists null is returned. If the function you are writing is time critical, you should anyway pay attention that reflection has some performance drawbacks.

Have a look at InvokeMethod...

MSDN

Example at codeproject

You could try something along the lines of...

Type type = this.GetType();
PropertyInfo[] properties = type.GetProperties();

foreach (PropertyInfo p in properties)
{
    // Check property is the one you want
    // and carry out your code...
}

Also, If you have access to the code I.E. you can change the internals but want to leave the public API intact you could just add the information to a private collection when the object is constructed. The collection could then be exposed by a public property for you to iterate over. A bit hacky but an alternative to using reflection.