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    <p>Concurrent access - this is something you can set using ServiceBehaviorAttribute. there are a number of options -- you can have WCF create a new instance of your service class for each incoming request, or you can have a single instance handle all requests. Additionally you can tell WCF whether to pass you the requests serially or concurrently.</p> <p>WebServiceHost -> WindowsService communication. Two approaches spring to mind: WCF supports a mode called "well known instance" where you pass an instance of your service to the ServiceHost constructor instead of passing a Type and letting WCF instantiate it for you. With this mode you can preconfigure your service instance with a reference back to your hosting code (alternatively you could use events). An alternative if you want to preserve instancing flexibility would be to have a static method in your hosting code that the WCF service could call back into.</p> <p>Multiple WebServiceHosts or Contracts - really no advantage to having more than one ServiceHost instance. see also this SO thread: <a href="https://stackoverflow.com/questions/2131796/what-are-the-benefits-for-several-servicehosts-does-one-servicehost-support-seve">What are the benefits for several servicehosts? Does one ServiceHost support several simultaneous connections on one endpoint?</a>.</p> <p>WSDL - While you can enable WSDL by turning on metadata publishing (<a href="http://msdn.microsoft.com/en-us/library/ms788760.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/ms788760.aspx</a>), WSDL support is intended for SOAP-based services, not pure HTTP GET/POST. The WSDL that gets auto-generated for your service will likely not be very useful.</p>
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    1. POSelf hosted WCF ServiceHost/WebServiceHost Concurrency/Peformance Design Options (.NET 3.5)
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    1. COThanks very much alexdej, particularly the Host/Service communication comment. I wish I had more time to mess about with the myriad of options available when setting up wcf service hosts. Thanks again, it's much appreciated.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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