Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

How to get the list of properties of a class?

People also ask

What is the properties of a class?

The collection of properties assigned to a class defines the class. A class can have multiple properties. For example, objects classified as computers have the following properties: Hardware ID, Manufacturer, Model, and Serial Number.

Can you have a list of classes C#?

A List class can be used to create a collection of any type. For example, we can create a list of Integers, strings and even any complex types. Unlike arrays, a List can grow in size automatically in other words a list can be re-sized dynamically but arrays cannot. List is a generic type.

What are properties in class give example?

Properties do not name the storage locations. Instead, they have accessors that read, write, or compute their values. For example, let us have a class named Student, with private fields for age, name, and code.

What is a property C#?

Property in C# is a member of a class that provides a flexible mechanism for classes to expose private fields. Internally, C# properties are special methods called accessors. A C# property have two accessors, get property accessor and set property accessor.


Reflection; for an instance:

obj.GetType().GetProperties();

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 ).

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.


public List<string> GetPropertiesNameOfClass(object pObject)
{
    List<string> propertyList = new List<string>();
    if (pObject != null)
    {
        foreach (var prop in pObject.GetType().GetProperties())
        {
            propertyList.Add(prop.Name);
        }
    }
    return propertyList;
}

This function is for getting list of Class Properties.


Based on @MarcGravell's answer, here's a version that works in Unity C#.

ObjectsClass foo = this;
foreach(var prop in foo.GetType().GetProperties()) {
    Debug.Log("{0}={1}, " + prop.Name + ", " + prop.GetValue(foo, null));
}

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

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

That's my solution

public class MyObject
{
    public string value1 { get; set; }
    public string value2 { get; set; }

    public PropertyInfo[] GetProperties()
    {
        try
        {
            return this.GetType().GetProperties();
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }

    public PropertyInfo GetByParameterName(string ParameterName)
    {
        try
        {
            return this.GetType().GetProperties().FirstOrDefault(x => x.Name == ParameterName);
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }

    public static MyObject SetValue(MyObject obj, string parameterName,object parameterValue)
    {
        try
        {
            obj.GetType().GetProperties().FirstOrDefault(x => x.Name == parameterName).SetValue(obj, parameterValue);
            return obj;
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
}

Try this:

var model = new MyObject();
foreach (var property in model.GetType().GetProperties())
{
    var descricao = property;
    var type = property.PropertyType.Name;
}