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11/18/2011

HttpTransportBindingElement Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Represents the binding element used to specify an HTTP transport for transmitting messages.

Inheritance Hierarchy

System.Object
  System.ServiceModel.Channels.BindingElement
    System.ServiceModel.Channels.TransportBindingElement
      System.ServiceModel.Channels.HttpTransportBindingElement
        System.ServiceModel.Channels.HttpsTransportBindingElement

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

Syntax

'Declaration
Public Class HttpTransportBindingElement _
    Inherits TransportBindingElement

public class HttpTransportBindingElement : TransportBindingElement

The HttpTransportBindingElement type exposes the following members.

Constructors

	Name	Description
	HttpTransportBindingElement()	Initializes a new instance of the HttpTransportBindingElement class.
	HttpTransportBindingElement(HttpTransportBindingElement)	Initializes a new instance of the HttpTransportBindingElement class.

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Properties

	Name	Description
	ManualAddressing	Gets or sets a value that indicates whether manual addressing of the message is required. (Inherited from TransportBindingElement.)
	MaxBufferSize	Gets or sets the maximum size of the buffer to use. For buffered messages this value is the same as MaxReceivedMessageSize. For streamed messages, this value is the maximum size of the SOAP headers, which must be read in buffered mode.
	MaxReceivedMessageSize	Gets and sets the maximum allowable message size that can be received. (Inherited from TransportBindingElement.)
	Scheme	Gets the URI scheme for the transport. (Overrides TransportBindingElement.Scheme.)
	TransferMode	Gets or sets a value that indicates whether messages are sent buffered or streamed.

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Methods

	Name	Description
	BuildChannelFactory<TChannel>	Creates a channel factory that can be used to create a channel. (Overrides BindingElement.BuildChannelFactory<TChannel>(BindingContext).)
	CanBuildChannelFactory<TChannel>	Determines whether a channel factory of the specified type can be built. (Overrides BindingElement.CanBuildChannelFactory<TChannel>(BindingContext).)
	Clone	Creates a copy of the current binding element. (Overrides BindingElement.Clone().)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetProperty<T>	Gets a property from the specified BindingContext. (Overrides TransportBindingElement.GetProperty<T>(BindingContext).)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

The HttpTransportBindingElement class is the starting point for creating a custom binding that implements the HTTP transport protocol. HTTP is the primary transport used for interoperability purposes.

The Silverlight 5 service model uses this class to create factory objects that implement the IChannelFactory interface. These factory objects in turn create the channels that transmit SOAP messages using the HTTP protocol.

You configure the factories that this class creates by setting its properties, such as MaxBufferSize.

You can also set properties on the base class, TransportBindingElement, such as MaxReceivedMessageSize and ManualAddressing. For a complete list of properties, see TransportBindingElement.

Examples

    ' This is an example of how to create a custom binding with a specified encoding and HTTP tansport,
    ' and how to create and open a channel for the service endpoint configured with the custom binding.
    Partial Public Class MainPage
        Inherits UserControl
        'Declare a separate UI thread.
        Private uiThread As SynchronizationContext

        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub Button_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)

            'Create a custom binding that uses HTTP transport and binary message encoding.
            Dim elements = New List(Of BindingElement)()
            elements.Add(New BinaryMessageEncodingBindingElement())

            ' Create an instance of the HttpTransportBindingElement
            Dim httpTransportBindingElement As New HttpTransportBindingElement()
            Dim txtDefaultMaxBufferSize As String = httpTransportBindingElement.MaxBufferSize.ToString()
            txtOutput1.Text = txtDefaultMaxBufferSize 'The value is 65536 (0x10000).

            ' Change the maximum buffer size.
            httpTransportBindingElement.MaxBufferSize = &H20000
            Dim txtNewMaxBufferSize As String = httpTransportBindingElement.MaxBufferSize.ToString()
            txtOutput2.Text = txtNewMaxBufferSize 'The value is 131072 (0x20000).

            ' Output http scheme.
            Dim txtScheme As String = httpTransportBindingElement.Scheme
            txtOutput5.Text = txtScheme 'The value is http.

            elements.Add(httpTransportBindingElement)
            Dim binding = New CustomBinding(elements)

            'Create a channel factory for the service endpoint configured with the custom binding.
            Dim cf = New ChannelFactory(Of IService1)(binding, New EndpointAddress("https://localhost:10483/Service1.svc"))


            'Save the synchronized context for the UI thread.
            uiThread = SynchronizationContext.Current

            'Open the channel.
            Dim channel As IService1 = cf.CreateChannel()

            'Invoke the GetPerson method on the service asynchronously. The signature is:
            'IAsyncResult BeginGetPerson(int personId, AsyncCallback callback, object state)
            channel.BeginGetPerson(4, AddressOf GetPersonCallback, channel)

        End Sub

        'Implement the callback. 
        Private Sub GetPersonCallback(ByVal asyncResult As IAsyncResult)
            Dim p As Person = (CType(asyncResult.AsyncState, IService1)).EndGetPerson(asyncResult)

            'Update the UI thread and its output with the result of the method call.
            uiThread.Post(AddressOf UpdateUI, p)

        End Sub

        'Update the result displayed for the GetPerson invocation.
        Private Sub UpdateUI(ByVal state As Object)
            Dim p As Person = CType(state, Person)
            resultPersonName.Text = "The name of the Person is: " & p.Name
            resultPersonAge.Text = "The age of the Person is: " & p.Age
        End Sub

    // This is an example of how to create a custom binding with a specified encoding and HTTP tansport,
    // and how to create and open a channel for the service endpoint configured with the custom binding.
    public partial class MainPage : UserControl
    {
        //Declare a separate UI thread.
        SynchronizationContext uiThread;

        public MainPage()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {

            //Create a custom binding that uses HTTP transport and binary message encoding.
            var elements = new List<BindingElement>();
            elements.Add(new BinaryMessageEncodingBindingElement());

            // Create an instance of the HttpTransportBindingElement
            HttpTransportBindingElement httpTransportBindingElement = new HttpTransportBindingElement();
            string txtDefaultMaxBufferSize = httpTransportBindingElement.MaxBufferSize.ToString();
            txtOutput1.Text = txtDefaultMaxBufferSize;  //The value is 65536 (0x10000).

            // Change the maximum buffer size.
            httpTransportBindingElement.MaxBufferSize = 0x20000;
            string txtNewMaxBufferSize = httpTransportBindingElement.MaxBufferSize.ToString();
            txtOutput2.Text = txtNewMaxBufferSize; //The value is 131072 (0x20000).

            // Output http scheme.
            string txtScheme = httpTransportBindingElement.Scheme;
            txtOutput5.Text = txtScheme; //The value is http.

            elements.Add(httpTransportBindingElement);
            var binding = new CustomBinding(elements);

            //Create a channel factory for the service endpoint configured with the custom binding.
            var cf = new ChannelFactory<IService1>(binding, new EndpointAddress("https://localhost:10483/Service1.svc"));


            //Save the synchronized context for the UI thread.
            uiThread = SynchronizationContext.Current;

            //Open the channel.
            IService1 channel = cf.CreateChannel();

            //Invoke the GetPerson method on the service asynchronously. The signature is:
            //IAsyncResult BeginGetPerson(int personId, AsyncCallback callback, object state)
            channel.BeginGetPerson(4, GetPersonCallback, channel);

        }

        //Implement the callback. 
        void GetPersonCallback(IAsyncResult asyncResult)
        {
            Person p = ((IService1)asyncResult.AsyncState).EndGetPerson(asyncResult);

            //Update the UI thread and its output with the result of the method call.
            uiThread.Post(UpdateUI, p);

        }

        //Update the result displayed for the GetPerson invocation.
        private void UpdateUI(object state)
        {
            Person p = (Person)state;
            resultPersonName.Text = "The name of the Person is: " + p.Name;
            resultPersonAge.Text = "The age of the Person is: " + p.Age;
        }

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

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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