Adding SOAP headers to ASMX service requests

Question

We were given a set of ASMX services to consume. We have no say in how these services are implemented. We have generated a number of proxies with wsdl.exe tool but for some reason unknown to me, these generated proxies don't have any means for including custom SOAP headers.

Basically, I need a way to add custom header data to various service calls.

I am aware of existence of SoapExtension class but unfortunately we're not allowed to use that due to supposed performance issues.

Are there any alternative ways of customizing/adding header data in SOAP requests?

Solution

you can use SoapHeader / SoapUnknownHeader to extend the generated proxy for this:

• http://msdn.microsoft.com/en-us/library/whew6x7f.aspx
• http://msdn.microsoft.com/en-us/library/y4t36w86.aspx
• http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapheader.aspx

EDIT - as per comments:

To include a custom namespace see the sample code here.