Convert object namespace and name to object

I need to call SetSettings() and using the 3 elements in splitSettings, set EncodeAudio to False. How would I go about doing that? Convert the property of a object to who's name I have in a string. I realize I could do with with a switch 开发者_JAVA百科statement of all my settings but there has to be a more dynamic way to go about doing this.

namespace SettingsLib
{
  public class Settings
  {
    public Boolean EncodeAudio { get; set; }
  }
}
namespace Service
{
   void SetSettings()
   {
     string[] splitSettings = { "SettingsLib.Settings", "EncodeAudio", "False" };
     // Need to set EncodeAudio to False in SettingsLib.Settings
   }
}

Yes I have a instance of Settings

Say:

Settings settingManager = new Settings();

I am trying to do is dynamically set EncodeAudo to False by using elements of splitSettings

settingManager.EncodeAudio = False;

Thanks to the help of TBohnen.jnr I came to this answer:

public void setProperty(object containingObject, string propertyName, object newValue)
{
    foreach (PropertyInfo p in containingObject.GetType().GetProperties())
    {
        if (p.Name == propertyName)
        {
            p.SetValue(containingObject, Convert.ChangeType(newValue, p.PropertyType), null);
        }
    }
}

---

EDIT Tested it with int, bool, double and string and it worked, also added a check to make sure that the property exists and throws an exception of it doesn't (Might want to change Exception type)

EDIT 2: Temporary solution, will add more typenames to the convert method or alternatively if somebody can suggest a more dynamic way of casting it (If not then I assume you will have to know all of the types that will be used)?

EDIT3 Stole the convert method from another answer in question (Chris Taylor ), thanks :-)

public void setProperty(object containingObject, string propertyName, object newValue)
    {
        if (containingObject.GetType().GetProperties().Count(c => c.Name == propertyName) > 0)
        {
            var type = containingObject.GetType().GetProperties().First(c => c.Name == propertyName).PropertyType;
            object val = Convert(type,(string)newValue);
            containingObject.GetType().InvokeMember(propertyName, BindingFlags.SetProperty, null, containingObject, new object[] { val });
        }
        else
        {
            throw new KeyNotFoundException("The property: " + propertyName + " was not found in: " + containingObject.GetType().Name);
        }
    }

    public object convert(System.Type type, string value)
    {
        return Convert.ChangeType(value, type);

    }

Taken from http://www.haslo.ch/blog/setproperty-and-getproperty-with-c-reflection/

Was interested to see if this works, create a quick test:

class testSettings
{
    public bool SetBool { get; set; }

    public void setProperty(object containingObject, string propertyName, object newValue) 
    {
         if (containingObject.GetType().GetProperties().Count(c => c.Name == propertyName) > 0)
        {
            containingObject.GetType().InvokeMember(propertyName, BindingFlags.SetProperty, null, containingObject, new object[] { newValue });
        }
        else
        {
            throw new KeyNotFoundException("The property: " + propertyName + " was not found in: " + containingObject.GetType().Name);
        }
    }
}

static void Main(string[] args)
{
    testSettings ts = new testSettings();
    ts.SetBool = false;
    ts.setProperty(ts, "SetBool", true);
    Console.WriteLine(ts.SetBool.ToString());
    Console.Read();
}

The output is true, not entirely sure if it will convert all types correctly though.

---

As others have mentioned, you should consider making your SettingsLib class static. And you might also need to handle the conversion of values from strings to the target types. Here is a simple example how this would work.

namespace Service
{
  class Program
  {
    static void Main(string[] args)
    {
      string[] splitSettings = { "SettingsLib.Settings", "EncodeAudio", "False" };
      SetProperty(splitSettings[0], splitSettings[1], splitSettings[2]);  
    }

    static void SetProperty(string typeName, string propertyName, object value)
    {
      var type = Type.GetType(typeName);
      if (type == null) 
      {
        throw new ArgumentException("Unable to get type", "typeName");
      }

      var pi = type.GetProperty(propertyName);
      if (pi == null) 
      {
        throw new ArgumentException("Unable to find property on type", "propertyName");
      }

      object propertyValue = value;

      if (propertyValue != null)
      {
        // You might need more elaborate testing here to ensure that you can handle 
        // all the various types, you might need to special case some types here 
        // but this will work for the basics.
        if (pi.PropertyType != propertyValue.GetType())
        {
          propertyValue = Convert.ChangeType(propertyValue, pi.PropertyType);
        }
      }

      pi.SetValue(null, propertyValue, null);
    }
  }
}

namespace SettingsLib
{
  public static class Settings
  {
    public static bool EncodeAudio { get; set; }    
  }
}

---

Maybe you should mark your settable properties as static and then try to set the values using Reflection:

namespace SettingsLib
{
  public static class Settings
  {
    public static bool EncodeAudio { get; set; }
  }
}
namespace Service
{
   void SetSettings()
   {
     string[] splitSettings = { "SettingsLib.Settings", "EncodeAudio", "False" };
     dynamic property = Type.GetType(splitSettings[0]).GetProperty(splitSettings[1]);
     property = splitSettings[2];
   }
}