REST WCF数据服务的简单示例

我需要开发两个站点之间的数据传输，并相信使用我们的.Net环境，RESTful实现会比使用FTP（ugh）的实现好得多。然而，简单的例子很难找到，而且REST基础被ADO.NET或许多巧妙的细节所掩盖，所以我试图让一个真正简单的例子自己做。尽管如此，我还是需要一些原则和实施方面的帮助才能让它发挥作用。

在一个VisualStudio web项目中，我为数据创建了一个新项WCF Data Service和一个类。这是App_Code''WidgetRecord.cs:

//using System;
using System.Collections.Generic;//List
using System.Linq;//Where
//using System.Web;
using System.ServiceModel;//ServiceContract, OperationContract
using System.Runtime.Serialization;//DataContract
using System.Diagnostics;//Debug.WriteLine()
/// <summary>
/// Declare operations for a service
/// </summary>
[ServiceContract]
public interface IScandataService
{
    [OperationContract]
    List<WidgetRecord> List();
    [OperationContract]
    WidgetRecord Get(string Id);
    [OperationContract]
    int Put(string Id, string Desc);
}//end interface
/// <summary>
/// Fake database storage for testing the WCF Data Service
/// </summary>
public static class Database
{
    /// <summary>
    /// Fake database table
    /// </summary>
    public static List<WidgetRecord> WidgetTable = new List<WidgetRecord>() { 
    new WidgetRecord("0001", "red"), 
    new WidgetRecord("0002", "blue") };
}
/// <summary>
/// Implement operations for a service.
/// Representation of a table of widgets identified by scanned barcodes
/// </summary>
[DataContract]
public class WidgetRecord : IScandataService
{
    /// <summary>
    /// Row column: the id which could be a scanned barcode
    /// </summary>
    public string Id { get; set; }
    /// <summary>
    /// Row column: widget description.
    /// (Other columns could be a timestamp, location etc)
    /// </summary>
    public string Desc { get; set; }
    /// <summary>
    /// Dummy initializer, needed for ....(??)
    /// </summary>
    public WidgetRecord()
    {
    return;
    }
    /// <summary>
    /// Initializer to populate the fake database storage.
    /// Creates a new widget record.
    /// </summary>
    /// <param name="Id"></param>
    public WidgetRecord(string Id, string Desc)
    {
    this.Id = Id;
    this.Desc = Desc;
    return;
    }
    /// <summary>
    /// List all stored widgets
    /// </summary>
    /// <returns></returns>
    [OperationContract]
    public List<WidgetRecord> List()
    {
    return Database.WidgetTable;
    }
    /// <summary>
    /// Get info on an existing widget
    /// </summary>
    /// <param name="Id"></param>
    /// <returns></returns>
    [OperationContract]
    public WidgetRecord Get(string Id)
    {
    WidgetRecord sd = Database.WidgetTable.Where(n => n.Id == Id).FirstOrDefault();
    if (sd == null)
        Debug.WriteLine(string.Format("Found: {0} - {1}", sd.Id, sd.Desc));
    else
        Debug.WriteLine(string.Format("Not found: id={0}", Id));
    return sd;
    }
    /// <summary>
    /// Add a new widget to the database
    /// </summary>
    /// <param name="Id"></param>
    /// <param name="Desc"></param>
    /// <returns></returns>
    [OperationContract]
    public int Put(string Id, string Desc)
    {
    Database.WidgetTable.Add(new WidgetRecord(Id, Desc));
    Debug.WriteLine(string.Format("Put: {0} - {1}", Id, Desc));
    return 0;
    }
}//end class

在其他来源中，我经常看到带有字段成员的[DataContract]的partial class，以及另一个带有方法的类。我不明白为什么要分开。我只是想使用ServiceContract接口作为我的数据类的基类。不管怎样，我的带有字段和方法的类构建得还可以

我指的是WcfDataService.svc的code-behind中的上述类，即App_Code'WcfDataService.cs:

//using System;
using System.Data.Services;//IDataServiceConfiguration, EntitySetRights, ServiceOperationRights, DataServiceProtocolVersion
//using System.Data.Services.Common;
//using System.Collections.Generic;
//using System.Linq;
//using System.ServiceModel.Web;
public class WcfDataService : DataService<WidgetRecord>
{
    // This method is called only once to initialize service-wide policies.
    public static void InitializeService(IDataServiceConfiguration config)
    {
    // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
    // Examples:
    config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
    config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);
    //config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
    return;
    }
}//end class

这一切都在构建和运行，但基本上什么都没做。

http://localhost:56794/website_for_rest/wcfDataService.svc/
-->
<?xml version="1.0" encoding="UTF-8" standalone="true"?>
<service xmlns="http://www.w3.org/2007/app" 
    xmlns:app="http://www.w3.org/2007/app" 
    xmlns:atom="http://www.w3.org/2005/Atom" 
    xml:base="http://localhost:56794/website_for_rest/WcfDataService.svc/">
    <workspace>
        <atom:title>Default</atom:title>
    </workspace>
</service>

我无法将命令添加到URL:

http://localhost:56794/website_for_rest/wcfDataService.svc/List
-->
page not found

我需要在web.config中添加一些内容吗？VS给了我一个126行的web.config，我不知道在哪里添加什么。

感谢您的帮助。