Binding Class

Contains the binding elements that specify the protocols, transports, and message encoders used for communication between clients and services.

Namespace:  System.ServiceModel.Channels
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

public abstract class Binding : IDefaultCommunicationTimeouts

The Binding type exposes the following members.

  NameDescription
Protected methodSupported by Portable Class LibraryBinding()Initializes a new instance of the Binding class with a default name and namespace.
Protected methodSupported by Portable Class LibraryBinding(String, String)Initializes a new instance of the Binding class from a specified binding of the service.
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  NameDescription
Public propertySupported by Portable Class LibraryCloseTimeoutGets or sets the interval of time provided for a connection to close before the transport raises an exception.
Public propertySupported by Portable Class LibraryMessageVersionGets the message version used by clients and services configured with the binding.
Public propertySupported by Portable Class LibraryNameGets or sets the name of the binding.
Public propertySupported by Portable Class LibraryNamespaceGets or sets the XML namespace of the binding.
Public propertySupported by Portable Class LibraryOpenTimeoutGets or sets the interval of time provided for a connection to open before the transport raises an exception.
Public propertySupported by Portable Class LibraryReceiveTimeoutGets or sets the interval of time that a connection can remain inactive, during which no application messages are received, before it is dropped.
Public propertySupported by Portable Class LibrarySchemeWhen implemented in a derived class, sets the URI scheme that specifies the transport used by the channel and listener factories that are built by the bindings.
Public propertySupported by Portable Class LibrarySendTimeoutGets or sets the interval of time provided for a write operation to complete before the transport raises an exception.
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  NameDescription
Public methodSupported by Portable Class LibraryBuildChannelFactory<TChannel>(BindingParameterCollection)Builds the channel factory stack on the client that creates a specified type of channel and that satisfies the features specified by a collection of binding parameters.
Public methodSupported by Portable Class LibraryBuildChannelFactory<TChannel>(Object[])Builds the channel factory stack on the client that creates a specified type of channel and that satisfies the features specified by an object array.
Public methodBuildChannelListener<TChannel>(BindingParameterCollection)Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified by a collection of binding parameters.
Public methodBuildChannelListener<TChannel>(Object[])Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, Object[])Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, BindingParameterCollection)Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, String, Object[])Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, String, BindingParameterCollection)Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, String, ListenUriMode, Object[])Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodBuildChannelListener<TChannel>(Uri, String, ListenUriMode, BindingParameterCollection)Builds the channel listener on the service that accepts a specified type of channel and that satisfies the features specified.
Public methodSupported by Portable Class LibraryCanBuildChannelFactory<TChannel>(BindingParameterCollection)Returns a value that indicates whether the current binding can build a channel factory stack on the client that satisfies the collection of binding parameters specified.
Public methodSupported by Portable Class LibraryCanBuildChannelFactory<TChannel>(Object[])Returns a value that indicates whether the current binding can build a channel factory stack on the client that satisfies the requirements specified by an object array.
Public methodCanBuildChannelListener<TChannel>(BindingParameterCollection)Returns a value that indicates whether the current binding can build a channel listener stack on the service that satisfies the collection of binding parameters specified.
Public methodCanBuildChannelListener<TChannel>(Object[])Returns a value that indicates whether the current binding can build a channel listener stack on the service that satisfies the criteria specified in an array of objects.
Public methodSupported by Portable Class LibraryCreateBindingElementsWhen overridden in a derived class, creates a collection that contains the binding elements that are part of the current binding.
Public methodSupported by Portable Class LibraryEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Portable Class LibraryFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Portable Class LibraryGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Portable Class LibraryGetProperty<T>Returns a typed object requested, if present, from the appropriate layer in the binding stack.
Public methodSupported by Portable Class LibraryGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodSupported by Portable Class LibraryMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodShouldSerializeNameReturns whether the name of the binding should be serialized.
Public methodShouldSerializeNamespaceReturns whether the namespace of the binding should be serialized.
Public methodSupported by Portable Class LibraryToStringReturns a string that represents the current object. (Inherited from Object.)
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Represents a collection of binding elements, each of which describes an aspect of how an endpoint communicates with other endpoints and that are built, consistently, into a channel factory on the client and into a channel listener on the service. A binding contains a collection of binding elements that correspond to protocol channels, transport channels, and message encoders. There can be any number of binding elements for protocol channels but one and only one binding element for each the transport and message encoder. There are commonly six layers of binding elements in a binding. Only the transport and encoding binding elements at the bottom of the stack are required. Because an encoding is required for each binding, if an encoding is not specified, adds a default encoding for you. The default is Text/XML for the HTTP and HTTPS transports, and Binary for other transports.

The following table summarizes the options for each layer.

Layer

Options

Required

Transaction Flow

TransactionFlowBindingElement

No

Reliability

ReliableSessionBindingElement

No

Security

Symmetric, Asymmetric, Transport-Level

No

Shape Change

CompositeDuplexBindingElement

No

Transport Upgrades

SSL stream, Windows stream, Peer Resolver

No

Encoding

Text, Binary, MTOM, Custom

Yes

Transport

TCP, Named Pipes, HTTP, HTTPS, MSMQ, Custom

Yes

Each binding element provides the specification for building a channel factory on the client and a channel listener on the service. When the channel factory stack is constructed, for example, there is one channel factory in the stack for each binding element in the binding. The same sort of mapping applies to the channel listeners in the stack on the service. Consistency on the client and service is critical for establishing the channel-based connection between these endpoints. Each factory and listener, in turn, processes the sending and accepting of the corresponding channels in the channel stack that connects them, and these channels can then send and receive the messages used to communicate.

Each instance of a Binding has a Name and Namespace that together uniquely identify it in the metadata of the service. If no name or namespace is specified, adds a default values for you. The default name is null and the default namespace is http://tempuri.org/. This user name for the binding is distinct from the specification of the protocol name, which is specified by the Scheme property. If you want to add more HTTP bindings, for example, you can name them whatever you want and set all of their schemes to "http". There is no inherent application or machine dispatch based on the Scheme. So you avoid the common problem of being unable to register additional handlers for well-known protocols. You can also easily work with multiple versions of a binding side-by-side by giving each version a different name.

The Binding class implements the IDefaultCommunicationTimeouts interface to mitigate Denial of Service (DOS) attacks that rely on tying up resources for extended intervals of time. The implementation specifies the communication timeouts values for opening and closing connections and for the reading and writing operations associated with receiving and sending messages. The properties used to get and set these timeouts and their default values operations are summarized in the following table.

Timeout Property

Default Value

OpenTimeout

1 minute

CloseTimeout

1 minute

SendTimeout

1 minute

ReceiveTimeout

10 minutes

When you create a binding by inheriting from Binding, you must override CreateBindingElements.

In addition, you can define your own binding elements and insert them between any of the defined layers in the preceding table. For more information, see the CustomBinding class.


BasicHttpBinding binding = new BasicHttpBinding();

binding.Name = "binding1";

Uri baseAddress = new Uri("http://localhost:8000/servicemodelsamples/service");
Uri address = new Uri("http://localhost:8000/servicemodelsamples/service/calc");

// Create a ServiceHost for the CalculatorService type and provide the base address.
using (ServiceHost serviceHost = new ServiceHost(typeof(CalculatorService), baseAddress))
{
    serviceHost.AddServiceEndpoint(typeof(ICalculator), binding, address);

    // Open the ServiceHostBase to create listeners and start listening for messages.
    serviceHost.Open();

    // The service can now be accessed.
    Console.WriteLine("The service is ready.");
    Console.WriteLine("Press <ENTER> to terminate service.");
    Console.WriteLine();
    Console.ReadLine();
    // Close the ServiceHostBase to shutdown the service.
    serviceHost.Close();
}


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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