帮助：演练：创建N层数据应用程序 [英] Help with: Walkthrough: Creating an N-Tier Data Application

问题描述

我正在使用VS 2017. 我正在尝试进行演练：

I am using VS 2017.  I am trying to do the walkthrough:

Walktrough

https://docs.microsoft.com/en-us/visualstudio/data-tools/walkthrough-creating-an-n-tier-data-application

I can get to the location: Adding Functions to the Service to Call the GetCustomers and GetOrders Methods in the Data Access Tier.  When I try to add the code:

<OperationContract()> _  
Function GetCustomers() As DataEntityTier.NorthwindDataSet.CustomersDataTable

DataEntityTier is not defined.  I have double checked the References for the DataServices Project, and DataEntityTier and DataAccessTier are in the references list.

Please help...

解决方案

If open to another idea check out the following with full source and script to create database and tables.

https://code.msdn.microsoft.com/Windows-forms-detail-view-89372f21?redir=0

If looking for Entity Framework I suggest this one for a start

https://code.msdn.microsoft.com/Entity-Framework-6-for-06edd4a8?redir=0

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