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    <p>Found the solution. It's multiple parts and requires a few changes to the C# side, more to the Delphi side. Note that this was tested with Delphi 2007 and Visual Studio 2008.</p> <p>C# side: Use BasicHttpBinding rather than WSHttpBinding.</p> <p><strong>Fix Step 1</strong></p> <pre><code>BasicHttpBinding myBinding = new BasicHttpBinding(); myBinding.Security.Mode = BasicHttpSecurityMode.None; </code></pre> <p>This change will resolve the application/soap+xml errors on the Delphi side.</p> <p>Delphi 2007 side: Running against the modified C# web service will now generate errors like this:</p> <blockquote> <p>Exception class ERemotableException with message 'The message with Action '' cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver. Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None).'</p> </blockquote> <p>To resolve this problem, add SOAPActions to all your supported interfaces. Here's the example from my code; this must be done AFTER all of the InvRegistry changes made by the import-from-WSDL-PAS-file's initialization section:</p> <p><strong>Fix Step 2</strong></p> <pre><code>InvRegistry.RegisterDefaultSOAPAction(TypeInfo(IVMProvisionCore), 'http://Cisco.VMProvision.Core/CoreServices/%operationName%'); </code></pre> <p>The type name and URL should be obtainable from the Delphi generated import file from the WSDL and/or an inspection of the actual WSDL. The above example was for my own project. After these code changes, then you'll the error:</p> <blockquote> <p>Exception class ERemotableException with message 'The formatter threw an exception while trying to deserialize the message: Error in deserializing body of request message for operation....</p> </blockquote> <p>This error is resolved by adding the following code (credits to <a href="http://www.bobswart.nl/weblog/Blog.aspx?RootId=5:798" rel="nofollow noreferrer">http://www.bobswart.nl/weblog/Blog.aspx?RootId=5:798</a>). Again, this new code must be after all the InvRegistry stuff in the initialization of the WSDL-to-PAS file.</p> <p><strong>Fix Step 3</strong></p> <pre><code>InvRegistry.RegisterInvokeOptions(TypeInfo(IVMProvisionCore), ioDocument); </code></pre> <p>At this point, packets will go back and forth between Delphi and C# - but parameters won't work properly. The C# will receive all parameters as nulls and Delphi doesn't seem to be receiving response parameters properly. The final code step is to use a slightly customized THTTPRIO object that will allow for literal parameters. The trick to this part is to make sure that the option is applied AFTER the interface has been obtained; doing it before won't work. Here's the code from my example (just snippets).</p> <p><strong>Fix Step 4</strong></p> <pre><code>var R: THTTPRIO; C: IVMProvisionCore; begin R:= THTTPRIO.Create(NIL); C:= GetIVMProvisionCore(False, TheURL, R); R.Converter.Options:= R.Converter.Options + [soLiteralParams]; </code></pre> <p>And now - my Delphi 2007 app can talk to the C#, stand-alone, non-IIS, WCF web service!</p>
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    1. POHow to consume non-IIS hosted, WCF, C# web service from Delphi 2007?
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    1. USJason Swager
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