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<mtomMessageEncoding>

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Specifies the encoding and message versioning used for SOAP Message Transmission Optimization Mechanism (MTOM) based messages.

<system.serviceModel>

  <bindings>

    <customBinding>

      <binding>

        <mtomMessageEncoding>

                                    
                                    <mtomMessageEncoding 
                                
                                    
                                       maxBufferSize="Integer"
                                
                                    
                                           
                                    
                                       maxReadPoolSize="Integer"
                                
                                    
                                       maxWritePoolSize="Integer"
                                
                                    
                                       messageVersion="Soap11Addressing1/Soap12Addressing10"
                                
                                    
                                           
                                    
                                       writeEncoding=”UnicodeFffeTextEncoding/Utf16TextEncoding/Utf8TextEncoding" />

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

Attribute Description

maxBufferSize

An integer that specifies the maximum size of the buffer that can be used.

maxReadPoolSize

An integer that specifies how many messages can be read simultaneously without allocating new readers. Larger pool sizes make the system more tolerant to activity spikes at the cost of a larger working set. The default is 64.

maxWritePoolSize

An integer that specifies how many messages can be sent simultaneously without allocating new writers. Larger pool sizes make the system more tolerant to activity spikes at the cost of a larger working set. The default is 16.

messageVersion

Specifies the SOAP version of the messages sent using the binding. Valid values are

  • Soap11Addressing1

  • Soap12Addressing10

The default is Soap12Addressing10. This attribute is of type MessageVersion.

writeEncoding

Specifies the character set encoding to be used for emitting messages on the binding. Valid values are

  • UnicodeFffeTextEncoding: Unicode BigEndian encoding

  • Utf16TextEncoding: Unicode encoding

  • Utf8TextEncoding: 8-bit encoding

The default is Utf8TextEncoding. This attribute is of type Encoding.

Child Elements

Element Description

<readerQuotas>

Defines the constraints on the complexity of SOAP messages that can be processed by endpoints configured with this binding. This element is of type XmlDictionaryReaderQuotasElement.

Parent Elements

Element Description

<binding>

Defines all binding capabilities of the custom binding.

Remarks

Encoding is the process of transforming a set of Unicode characters into a sequence of bytes.

The MtomMessageEncodingSection configuration section specifies the character encoding and message versioning used for a message using a Message Transmission Optimization Mechanism (MTOM) encoding. (MTOM) is an efficient technology for transmitting binary data in Windows Communication Foundation (WCF) messages. The MTOM encoder attempts to strike a balance between efficiency and interoperability. The MTOM encoding transmits most XML in textual form, but optimizes large blocks of binary data by transmitting them as-is, without conversion to text.

Example

<mtomMessageEncoding maxReadPoolSize="211"
    maxWritePoolSize="2132"
    messageVersion=”Soap11Addressing10”
    textEncoding=”utf-8” />

See Also

Reference

MtomMessageEncodingElement

Concepts

Message Encoding

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