C # resolves conversions for nullable types (including serialization and deserialization of DataContract and is useful when the example is applied to reflection properties SetValue)

Using System;
Using System.Collections.Generic;
Using System.IO;
Using System.Linq;
Using System.Reflection;
Using System.Runtime.Serialization;
Using System.Text;
Using System.Threading.Tasks;
Using System.Xml.Linq;

Namespace ConsoleApplication11
{
[DataContract]
public class Xelementcontainer
{
[DataMember]
Public XElement member;

Public Xelementcontainer ()
{
member = Xlinqtest.createxelement ();
}
}
[DataContract]
public class Xelementnullcontainer
{
[DataMember]
Public XElement member;

Public Xelementnullcontainer ()
{
member = NULL;
}
}
/* Copyright (c) Xiamen Haihui software Co., Ltd. All rights reserved
*
* Create by [e-mail protected] at 2014-10-14 10:09:18
*
*/

<summary>
Trading
</summary>
[DataContract (Namespace = "Contract.domain")]
public class Student
{
<summary>
Trading Day ID
</summary>
[DataMember]
public virtual int? Businessdateid
//{
Get
Set
//}

<summary>
Latest update Date
</summary>
[DataMember]
Public virtual DateTime? Asofdate
{
Get
Set
}

<summary>
Trading Date
</summary>
[DataMember]
Public virtual DateTime? TransactionDate
{
Get
Set
}

<summary>
Business Date
</summary>
[DataMember]
Public virtual DateTime? Processdate
{
Get
Set
}

<summary>
Upload Date
</summary>
[DataMember]
Public virtual DateTime? Uploaddate
{
Get
Set
}

<summary>
Calculate date
</summary>
[DataMember]
Public virtual DateTime? Computedate
{
Get
Set
}

<summary>
Enter Date
</summary>
[DataMember]
Public virtual DateTime? Inputdate
{
Get
Set
}

<summary>
Settlement Date
</summary>
[DataMember]
Public virtual DateTime? Settledate
{
Get
Set
}

<summary>
End Date
</summary>
[DataMember]
Public virtual DateTime? Closedate
{
Get
Set
}

<summary>
Release date
</summary>
[DataMember]
Public virtual DateTime? Postdate
{
Get
Set
}

<summary>
Reminder Date
</summary>
[DataMember]
Public virtual DateTime? Noticedate
{
Get
Set
}

<summary>
Date of day
</summary>
[DataMember]
Public virtual DateTime? currentdate
{
Get
Set
}

<summary>
Day before
</summary>
[DataMember]
Public virtual DateTime? Priordate
{
Get
Set
}


}

public class Xlinqtest
{
static void Main (string[] args)
{
Test<xelement> (Createxelement ());
Test<xelementcontainer> (New Xelementcontainer ());
Test<xelementnullcontainer> (New Xelementnullcontainer ());
DateTime dt = DateTime.Parse (DateTime.Now.ToString ("Yyyy-mm-dd"));
Test<student> (New Student () {asofdate=dt, Closedate=dt, Computedate=dt, Currentdate=dt, Inputdate=dt, Noticedate=dt, Postdate=dt, Priordate=dt, Processdate=dt, Settledate=dt, Transactiondate=dt, UploadDate=dt});
Console.ReadLine ();
}
public static XElement Createxelement ()
{
return new XElement (Xname.get ("Nameinnamespace", "http://www.adventure-works.org"));
}
public static void test<t> (T obj) where t:new ()
{
DataContractSerializer s = new DataContractSerializer (typeof (T));
using (FileStream fs = File.Open ("Test" + typeof (T). Name + ". xml", FileMode.Create))
{
S.writeobject (Fs,obj);


}
using (FileStream fs=file.open ("Test" +typeof (T). name+ ". xml", FileMode.Open))
{

Object S2=s.readobject (FS);
Type type = S2. GetType ();
Propertyinfo[] PS = type. GetProperties ();
foreach (PropertyInfo p in PS)
{
String propertyname = P.name;
String propertyvalue = P.getvalue (S2). ToString ();
Console.WriteLine (propertyname+ "\ t" +propertyvalue);
}
T t = new t ();
Console.WriteLine ("Value assigned to the new object is as follows: \ r \ n");
foreach (PropertyInfo p in PS)
{
String propertyname = P.name;
String propertyvalue = P.getvalue (S2). ToString ();
if (!p.propertytype.isgenerictype)
{
P.setvalue (t, string. IsNullOrEmpty (PropertyValue)? Null:Convert.ChangeType (PropertyValue, P.propertytype));
}
Else
{
Generic nullable<>
Type generictypedefinition = P.propertytype.getgenerictypedefinition ();
if (generictypedefinition = = typeof (Nullable<>))
{
P.setvalue (obj, String. IsNullOrEmpty (PropertyValue)? Null:Convert.ChangeType (PropertyValue, Nullable.getunderlyingtype (P.propertytype)));
}
}



}
propertyinfo[] Newpropertyinfo = type. GetProperties ();
foreach (PropertyInfo p in Newpropertyinfo)
{
String propertyname = P.name;
String propertyvalue = P.getvalue (S2). ToString ();
Console.WriteLine (propertyname + "\ T" + propertyvalue);

}
if (S2 = = null)
{
Console.WriteLine ("Deserialized object is null (Nothing in VB)");
}
Else
{
Console.WriteLine ("deserialized type: {0}", S2. GetType ());
}

}

}
}
}

C # resolves conversions for nullable types (including serialization and deserialization of DataContract and is useful when the example is applied to reflection properties SetValue)