How To Get The List Of Properties Of Class?

Question

How do I get a list of all the properties of a class?

Answer 1

Reflection; for an instance:

obj.GetType().GetPropeties();

for a type:

typeof(Foo).GetProperties();

for example:

class Foo {
    public int A {get;set;}
    public string B {get;set;}
}
...
Foo foo = new Foo {A = 1, B = "abc"};
foreach(var prop in foo.GetType().GetProperties()) {
    Console.WriteLine("{0}={1}", prop.Name, prop.GetValue(foo, null));
}

---

Following feedback...

• To get the value of static properties, pass null as the first argument to GetValue
• To look at non-public properties, use (for example) GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance) (which returns all public/private instance properties ).

Answer 2

You can use reflection.

Type typeOfMyObject = myObject.GetType();
PropertyInfo[] properties =typeOfMyObject.GetProperties();

Answer 3

You can use Reflection to do this: (from my library - this gets the names and values)

public static Dictionary<string, object> DictionaryFromType(object atype)
    {
        if (atype == null) return new Dictionary<string, object>();
        Type t = atype.GetType();
        PropertyInfo[] props = t.GetProperties();
        Dictionary<string, object> dict = new Dictionary<string, object>();
        foreach (PropertyInfo prp in props)
        {
            object value = prp.GetValue(atype, new object[]{});
            dict.Add(prp.Name, value);
        }
        return dict;
    }

This thing will not work for properties with an index - for that (it's getting unwieldy):

public static Dictionary<string, object> DictionaryFromType(object atype, 
     Dictionary<string, object[]> indexers)
{
     /* replace GetValue() call above with: */
     object value = prp.GetValue(atype, ((indexers.ContainsKey(prp.Name)?indexers[prp.Name]:new string[]{});
}

Also, to get only public properties: (see MSDN on BindingFlags enum)

/* replace */
PropertyInfo[] props = t.GetProperties();
/* with */
PropertyInfo[] props = t.GetProperties(BindingFlags.Public)

This works on anonymous types, too!
To just get the names:

public static string[] PropertiesFromType(object atype)
    {
        if (atype == null) return new string[] {};
        Type t = atype.GetType();
        PropertyInfo[] props = t.GetProperties();
        List<string> propNames = new List<string>();
        foreach (PropertyInfo prp in props)
        {
            propNames.Add(prp.Name);
        }
        return propNames.ToArray();
    }

And it's just about the same for just the values, or you can use:

 GetDictionaryFromType().Keys
 // or
 GetDictionaryFromType().Values

But that's a bit slower, I would imagine.

Answer 4

You could use the System.Reflection namespace with the Type.GetProperties() mehod:

PropertyInfo[] propertyInfos;
propertyInfos = typeof(MyClass).GetProperties(BindingFlags.Public|BindingFlags.Static);