. NET Object serialization-IPAddress

IPAddress does not have a default constructor and cannot be serialized normally. IPAddrss supports the following constructor types:

   1: public IPAddress(byte[] address);

   2: public IPAddress(long newAddress);

   3: public IPAddress(byte[] address, long scopeid);

Sample Code:

   1: class Program

   2: {

   3:     static void Main(string[] args)

   4:     {

   5:         TestClass testClass = new TestClass();

   6:         

   7:         using (MemoryStream stream = new MemoryStream())

   8:         {

   9:             XmlSerializer ser = new XmlSerializer(typeof(TestClass));

  10:             ser.Serialize(stream, testClass);

  11:             string result = Encoding.UTF8.GetString(stream.ToArray());

  12:         }

  13:     }

  14: }

  15:  

  16: public class TestClass

  17: {

  18:     public IPAddress IP { get; set; }

  19: }

Running prompt:

Solution: Expand IPAddress:

   1: class Program

   2: {

   3:     static void Main(string[] args)

   4:     {

   5:         TestClass testClass = new TestClass();

   6:         testClass.IP.IPAddressAsString = "127.0.0.1";

   7:         

   8:         using (MemoryStream stream = new MemoryStream())

   9:         {

  10:             XmlSerializer ser = new XmlSerializer(typeof(TestClass));

  11:             ser.Serialize(stream, testClass);

  12:             string result = Encoding.UTF8.GetString(stream.ToArray());

  13:         }

  14:     }

  15: }

  16:  

  17: public class TestClass

  18: {

  19:     public IPAddressEx IP { get; set; }

  20:  

  21:     public TestClass()

  22:     {

  23:         this.IP = new IPAddressEx();

  24:     }

  25: }

  26:  

  27: public class IPAddressEx

  28: {

  29:     [XmlElement(ElementName = "IPAddress")]

  30:     public string IPAddressAsString

  31:     {

  32:         get { return IPAddress != null ? IPAddress.ToString() : null; }

  33:         set

  34:         {

  35:             IPAddress ip;

  36:             if (value != null && IPAddress.TryParse(value, out ip))

  37:                 IPAddress = ip;

  38:             else

  39:                 IPAddress =null;

  40:         }

  41:     }

  42:     [XmlIgnore]

  43:     public IPAddress IPAddress { get; set; }

  44: }

Serialization result:

   1: <?xml version="1.0"?>

   2: <TestClass xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

   3:   <IP>

   4:     <IPAddress>127.0.0.1</IPAddress>

   5:   </IP>

   6: </TestClass>

   6: </TestClass>