What is a binding?
?? A binding is a simple way to specify three important things
?? A transport: HTTP, TCP, MSMQ, etc
?? An encoding: XML 1.0, MTOM, or binary XML
?? A suite of protocols: security, reliable messaging, etc
?? You define bindings by choosing from these options
?? WCF provides built-in bindings that fill common needs
?? Bindings are used by the runtime to build channel stack
?? Bindings translate into WSDL + WS-Policy when shared
Built-in binding configurations
?? WCF provides built-in binding classes to simplify things
?? Provide configurations that meet the most common needs
?? Based on today's best practices and real-world scenarios
?? The built-in bindings will get you up and running quickly
?? You can then configure them to fit your precise needs
Built-in binding comparison
The table is shown in the attached document.
Configuring the built-in bindings
• The built-in bindings can be configured in code or config
o Simply instantiate binding class and set properties
...
// Uses the built-in BasicHttpBinding
BasicHttpBinding b = new BasicHttpBinding();
b.Security.Mode = BasicHttpSecurityMode.Transport;
// Enables transport security
b.Security.Transport.ClientCredentialType =
HttpClientCredentialType.Basic;
host.AddServiceEndpoint(
typeof(IEchoService), b, "svc");
Configuring the built-in bindings
address="https://localhost:8082/echo/svc"
binding="basicHttpBinding"
bi di fi i " idi fi i "
bindingConfiguration="MyBindingConfiguration"
contract="ServiceLibrary.IEchoService"/>
...
transport clientCredentialT pe "Basic" /
Defining a custom binding
?? In WCF, a binding is simply a collection of binding elements
?? CustomBinding makes defining a custom binding easy
?? You add binding elements to its Elements collection
?? BindingElement is the base class for all binding elements
?? Found in the System.ServiceModel.Channels namespace
?? Each binding element maps to a node in the channel stack
?? The order of the binding elements is significant
?? Determines how the channel stack is built
Defining custom bindings
• ?? Custom bindings can be defined via CustomBinding class
o Can also define in configuration via element
CustomBinding myBinding = new CustomBinding();
myBinding.Name = "MyBasicHttpBinding";
... // add binding elements here
...
bi di " i tt i di "
Order of binding elements
Binding elements must be organized in the following order:
1. Transaction Flow
2. Reliable Session
3. Security (message)
4. Composite duplex
5. Encoding
6. Security (transport)
7. Transport
5 & 7 are required
 Attachments
Bindings Comparison (24658-31729-Binding Comparison.doc)
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| Author: ChandraShekar Thota 26 Jan 2009 | Member Level: Diamond Points : 2 |
Good one
Chandrashekar Thota(Editor, MVP)
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