<br><b>Code</b>: rsb:print<br><b>Error</b>: Formatter [ extraconnectionprops ] failed in the evaluation of <p> The [company_name] ADO.NET Provider for [service] enables you to use the Windows Communication Foundation (WCF) framework to rapidly develop service-oriented applications that provide [datasource] to OData consumers. This article shows how to create an entity data model to provide the underlying connectivity to the [datasource], as well as how to create a WCF Data Service to expose the OData service. You can then consume the feed with any OData client, for example, Power Pivot or an application that uses the [company_name] ADO.NET Provider for OData. </p> <h2>Create the OData Service</h2> <p> Follow the steps below to create a WCF service application that will provide connectivity to [datasource] via OData. </p> <ol> <li>Open Visual Studio and create a new project. Select the WCF Service Application template.</li> <li>Delete the autogenerated IService.cs and Service1.svc.</li> <li>Click Project -> Add New Item -> ADO.NET Entity Data Model.</li> <li>In the Entity Data Model wizard that is displayed, select the 'EF Designer from Database' option. <li>In the resulting Choose Your Connection dialog, click New Connection. <li><p>In the Connection properties dialog, select the [company_name] [service] Data Source and enter the necessary credentials. A typical connection string is below: </p><code>[extraconnectionprops]. The error was: The value of the attribute could not be accessed: The attribute does not exist.<br><b>URL</b>: /jp/kb/tech/qoo10-ado-odserv.rst