C#

int? valueAsNumber = null; shows null

/// <summary>
/// Parse a set of values into an instance of tbl_Mine_MineGroup using Reflection
/// </summary>
public static tbl_Location ParseLocation(IOrderedDictionary values)
{
  tbl_Location locFromValues = new tbl_Location();
  Type locType = typeof(tbl_Location);    // we KNOW this
            
  // use reflection to update properties, because I'm lazy
  foreach (DictionaryEntry value in values)
  {
    string key = value.Key as string;
    if (key == null)
      throw new InvalidOperationException(string.Format("Key is not a string: {0}", value.Key);
    string val = value.Value as string;
    bool emptyValue = string.IsNullOrEmpty(val);
    object storableValue = null;

    if (key.Equals("Latitude") || key.Equals("Longitude"))
    {
      double parsed;
      // if the parse fails treat it the same as empty and leave storableValue null
      if (!emptyValue && double.TryParse(val, out parsed))
        storableValue = parsed; 
    }
    else if (key.Contains("ID"))
    {
      int parsed;
      // if the parse fails treat it the same as empty and leave storableValue null
      if (!emptyValue && int.TryParse(val, out parsed))
        storableValue = parsed; 
    }
    else
    {
      storableValue = val;
    }
    // storableValue has null or the "boxed" values of the parsed numeric values or the string
    // this is equivalent to using double? and int? above
    locType.GetProperty(key).SetValue(locFromValues, storableValue);
  }
 
  return locFromValues;
}

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