SoapHeader.Actor Property


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Gets or sets the recipient of the SOAP header.

Namespace:   System.Web.Services.Protocols
Assembly:  System.Web.Services (in System.Web.Services.dll)

public string Actor { get; set; }

Property Value

Type: System.String

The recipient of the SOAP header. The default is an empty string ("").

To set the recipient of a SOAP header, set the Actor property. Regardless of the version of the SOAP protocol used to communicate with an XML Web service, the .NET Framework automatically generates the SOAP message specific to the version of the SOAP protocol. Specifically, the XML element and XML namespace representing the recipient differ for the two versions.

XML Web services receiving the SOAP header can get the intended recipient by getting either the Role or Actor properties.

The recipient(s) for the Body element and each of the SOAP headers within the Header element of a SOAP message need not be the same. If a Header element exists in the SOAP message, it represents additional data that can be sent to and from the XML Web service method or an intermediary. The recipient of that data, known as the SOAP Actor in version 1.1, can be a different URI than the URI for the XML Web service method.

For more information on the SOAP actor attribute, see the SOAP specification at

The following XML Web service client calls the MyWebMethod XML Web service method after creating a custom SOAP header of type MyHeader and setting the Actor property to

using System;

public class Sample {

    public static void Main() {
        MyWebService ws = new MyWebService();

        try {
            MyHeader customHeader = new MyHeader();
            customHeader.MyValue = "Header Value for MyValue";
            customHeader.Actor = "";
            ws.myHeader = customHeader;

	    int results = ws.MyWebMethod(3,5);
        catch (Exception e) {
            Console.WriteLine ("Exception: {0}", e.ToString());

.NET Framework
Available since 1.1
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