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NewChannel Property

Summary
Gets or sets the client channel type.

Syntax
C#
C++/CLI
Python
public string[] NewChannel { get; set; } 
public: 
property array<String^>^ NewChannel { 
   array<String^>^ get(); 
   void set (    array<String^>^ ); 
} 
NewChannel # get and set (ChannelFields) 

Property Value

An array of System.String values which names one or more transport protocols that the client is willing to accept.

Remarks

Use one of the values from the JpipChannelTypes class.

Use this field to request a new JPIP channel from the server. When a channel is established between a client and server, the server will maintain a cache model for the data it sends to the client. This helps minimize the amount of data transferred between the server and client.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Jpip; 
using Leadtools.Jpip.Caching; 
using Leadtools.Jpip.HttpServer; 
using Leadtools.Jpip.RequestDecoder; 
using Leadtools.Jpip.RequestEncoder; 
using Leadtools.Jpip.Client.WinForms; 
using Leadtools.Jpip.Client.InteractiveDecoder; 
using Leadtools.Jpip.Server; 
using Leadtools.Jpip.Logging; 
 
public void SendClientRequest() 
{ 
   Leadtools.Examples.Support.SetLicense(); 
   RequestFields fields = new RequestFields(); 
   ModelItem cacheModleItem; 
   ExplicitBinDescriptor binDescriptor; 
   ModelElement cacheModleElement; 
 
   fields.RequestTargetFields = new TargetFields("0", "image1.jp2", null); 
   fields.RequestChannelFields.NewChannel = new string[] { "http" }; 
   fields.RequestDataLimitFields.DataLength = 16384; 
   cacheModleItem = new ModelItem(); 
   binDescriptor = new ExplicitBinDescriptor(ExplicitBin.MetaBin, 0, null); //indicate that metadata bin 0 is locally cached and need not be sent. 
   cacheModleElement = new ModelElement(false, binDescriptor); 
   cacheModleItem.BinDescriptors.Add(cacheModleElement); 
   cacheModleItem.CodeStreamRange.Add(new Range(0, 0)); 
   fields.RequestCacheManagementFields.ModelItems.Add(cacheModleItem); 
   ImageReturnType imageType = new ImageReturnType(ImageTypes.JppStream, false); 
   fields.RequestServerControlFields.ImageReturnTypes = new ImageReturnType[] { imageType }; 
   fields.RequestViewWindowFields.FrameSize = new LeadSize(500, 300); 
   fields.RequestViewWindowFields.RegionOffset = new LeadPoint(0, 100); 
   fields.RequestViewWindowFields.FrameSizeRoundingDirection = RoundingDirection.Closest; 
   SampleRange codeStreamRange = new SampleRange(); 
   codeStreamRange.Range = new Range(0, 0); 
   fields.RequestViewWindowFields.CodeStream.Add(codeStreamRange); 
   HttpRequestEncoder encoder = new HttpRequestEncoder(IPAddress.Parse("127.0.0.1"), 108); 
   HttpWebRequest request = encoder.Encode(fields, "jpip", null); 
   Console.WriteLine(request.Address.ToString()); 
   HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
   Console.WriteLine("Server response received."); 
   Console.WriteLine(response.Headers.ToString()); 
} 
 
public Socket GetClientSocket() 
{ 
   Socket listenSocket = new Socket(AddressFamily.InterNetwork, 
                                     SocketType.Stream, 
                                     ProtocolType.Tcp); 
   IPAddress hostIP = IPAddress.Parse("127.0.0.1"); 
   int port = 107; 
   IPEndPoint ep = new IPEndPoint(hostIP, port); 
   listenSocket.Bind(ep); 
   // start listening 
   listenSocket.Listen(10); 
   //a client should send a request to the listening address 
   Socket client = listenSocket.Accept(); 
   listenSocket.Close(); 
   return client; 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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Leadtools.Jpip Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.