//show the person information
public static void ShowPerson(PERSON person)
{
Console.WriteLine("cardid :" + Encoding.ASCII.GetString(person.identicardid));
Console.WriteLine("name :" + Encoding.ASCII.GetString(person.name));
Console.WriteLine("country :" + Encoding.ASCII.GetString(person.country));
Console.WriteLine("nation :" + Encoding.ASCII.GetString(person.nation));
Console.WriteLine("birthday :" + Encoding.ASCII.GetString(person.birthday));
Console.WriteLine("address :" + Encoding.ASCII.GetString(person.address));
}
public static void MarshalStructureToPtrTest()
{
PERSON person;
person.identicardid = MarshalTestProgram.CodeBytes("123456198001011111", define.MAX_LENGTH_OF_IDENTICARDID);
person.name = MarshalTestProgram.CodeBytes("jackson", define.MAX_LENGTH_OF_NAME);
person.country = MarshalTestProgram.CodeBytes("China", define.MAX_LENGTH_OF_COUNTRY);
person.nation = MarshalTestProgram.CodeBytes("HanZu", define.MAX_LENGTH_OF_NATION);
person.birthday = MarshalTestProgram.CodeBytes("19800101", define.MAX_LENGTH_OF_BIRTHDAY);
person.address = MarshalTestProgram.CodeBytes("Luoshan Road, Shanghai", define.MAX_LENGTH_OF_ADDRESS);
int nSizeOfPerson = Marshal.SizeOf(person);
IntPtr intPtr = Marshal.AllocHGlobal(nSizeOfPerson);
Console.WriteLine("The person infomation is as follows:");
MarshalTestProgram.ShowPerson(person);
try
{
//将数据从托管对象封送到非托管内存块,该内存块开始地址为intPtr
Marshal.StructureToPtr(person, intPtr, true);
//将数据从非托管内存块封送到新分配的指定类型的托管对象anotherPerson
PERSON anotherPerson = (PERSON)Marshal.PtrToStructure(intPtr, typeof(PERSON));
Console.WriteLine("The person after copied is as follows:");
MarshalTestProgram.ShowPerson(anotherPerson);
}
catch (ArgumentException)
{
throw;
}
finally
{
Marshal.FreeHGlobal(intPtr); //free tha memory
}
Console.ReadLine();
}