How do I check if a property exists on a dynamic anonymous type in c#?

.net-4.0, c#, c#-4.0, dynamic, reflection

Solution

  public static bool DoesPropertyExist(dynamic settings, string name)
  {
    if (settings is ExpandoObject)
      return ((IDictionary<string, object>)settings).ContainsKey(name);

    return settings.GetType().GetProperty(name) != null;
  }

  var settings = new {Filename = @"c:\temp\q.txt"};
  Console.WriteLine(DoesPropertyExist(settings, "Filename"));
  Console.WriteLine(DoesPropertyExist(settings, "Size"));

Output:

 True
 False

Problem

I have an anonymous type object that I receive as a dynamic from a method I would like to check in a property exists on that object. ``` .... var settings = new { Filename="temp.txt", Size=10 } ... function void Settings(dynamic settings) { var exists = IsSettingExist(settings,"Filename") } ``` How would I implement IsSettingExist ?

Original source

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