Detailed explanation of examples of uploading files through Remoting service in ASP.NET

Recently, I am learning Remoting, just to understand it, and I found that Remoting is indeed a good thing.

We usually have three ways to use remoting, one is

The first one: Publishing a public object
The public object is created locally
The second one: Remote creation of a public object (SAO)
The object is created in the client request
Third type: Remote creation of a private object (CAO)
The object is created on HOST, and the client refers to the object on the server

Contents I don’t have a good understanding of the essential differences between these three types. The remoting creation methods of these three methods are also different.

The first way
Host:
ChannelServices.RegisterChannel (new TcpChannel(1500));
cTransfer Trans = new cTransfer();
RemotingServices.Marshal (Trans, " TestService");Client:
cTransfer T = (cTransfer) Activator.GetObject(typeof(cTransfer),
"tcp://host:1500/TestService");
Second way
Host:
ChannelServices.RegisterChannel (new TcpChannel(1500));
RemotingConfiguration.RegisterWellKnownServiceType(typeof(cTransfer),
"TestService", WellKnownObjectMode.Singleton);Client:
cTransfer T = (cTransfer ) Activator.GetObject(typeof(cTransfer),
“tcp://host:1500/TestService”);
The third way
Host:
ChannelServices.RegisterChannel (new TcpChannel(1500) );
RemotingConfiguration.RegisterActivatedServiceType(typeof(cTransfer));Client:
object[] attr = {new UrlAttribute("tcp://host:1500")};
object[] args = { "Sample constructor argument"};
cTransfer T = (cTransfer) Activator.CreateInstance(typeof(cTransfer), args, attr);
If we need an object (object) to allow remote call processing, then this object ( object) needs to inherit from the MarshalByRefObject class.

How to transfer files during remoting? The basic idea is to open the client's file in the client, convert the Byte[] type and then call the host object.
Objects transferred between Client and Host
[Serializable]
Public struct kAction
{
Public string filename;
public byte[] context;

} ;Open the file and save the stream bytes to the Context
Stream fileStream=File.Open(this.transFileName.Text,FileMode.Open);
          fileStream.Position=0;
      byte[] Content = new byte[((int) fileStream.Length) + 1];
                                                                                        fileStream.Read(Content,0,Content.Length);
After the Host reads the Kaction, save it to the specified file Clip below
MemoryStream meoeryStream=new MemoryStream(k_Action.context);
FileStream fileStream=new FileStream(@"d:\"+k_Action.filename,FileMode.Create);
meoeryStream.WriteTo(fileStream) ;
             fileStream.Close(); When preparing to send to HOST, it will prompt "contains potentially dangerous types".
[Serializable]
public struct kAction
{
public string filename;
public byte[] context;
public FineInfo fileInfo;//here

};

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