jquery - 使用 jQuery 和 OData（WCF 数据服务）更新/插入多行

Question

我有三个表，模板、字段和模板字段。TemplateFields 保存每个模板的选定字段。当用户完成选择字段时，我需要更新 TemplateFields。我能看到的唯一方法是删除该模板的所有 TemplateFields，然后在单独的请求中一一添加它们。这真的很糟糕，因为没有交易可以退回，而且还会有很多请求。

有没有办法使用 WCF 数据服务一次添加多个“对象”？然后我可以使用拦截器来更新数据库。

Answer 1

See this article "Adding/Creating data to OData/Wcf Data Service batch explained":

http://franssenden.wordpress.com/2010/06/18/addingcreating-data-to-odatawcf-data-service-batch-explained/

Update:

The article has moved to:
http://www.fcodings.com/2010/06/18/addingcreating-data-to-odatawcf-data-service-batch-explained/

Quoting from the post as per request in comments

1. Service

   using System.Collections.Generic;
   using System.Data.Services;
   using System.Linq;
   using System.ServiceModel.Web;
   using System.Web;
   using System.Linq.Expressions;
   using System.Data.Services.Common;
   
   namespace TestAdventureWorksDataServices
   {
       public class AdventureService : DataService<AdventureWorksEntities>
       {
           // This method is called only once to initialize service-wide policies.
           public static void InitializeService(DataServiceConfiguration config)
           {
               // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
               // Examples:
               config.SetEntitySetAccessRule("*", EntitySetRights.All);
               // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All);
               config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
               config.UseVerboseErrors = false;
           }
   
           protected override void HandleException(HandleExceptionArgs args)
           {
               throw new DataServiceException(args.Exception.InnerException.Message, args.Exception);
           }
   
       }
   }
   

2. Client

   using System;
   using System.Collections.Generic;
   using System.Linq;
   using System.Text;
   using System.Data.Services.Client;
   
   namespace Client
   {
       using Client.AdventureWorksServiceReference;
   
       class Program
       {
           private static AdventureWorksEntities _context = null;
   
           static void Main(string[] args)
           {
               _context = new AdventureWorksEntities(new Uri("http://ipv4.fiddler:51824/AdventureService.svc"));
   
               var product1 = Product.CreateProduct(0, "My Test Product 1", "1234", true, true, 1, 1, 100, 200, 3,
               DateTime.Now, new Guid("E29C16AE-908A-4F53-8E19-DC2CFDDF08A0"), DateTime.Now);
   
               var product2 = Product.CreateProduct(0, "My Test Product 2", "5678", true, true, 1, 1, 200, 300, 3,
               DateTime.Now, new Guid("1B9689D6-CCFF-40C3-AA0F-1AC3C5951738"), DateTime.Now);
   
               var product3 = Product.CreateProduct(0, "My Test Product 3", "9876", true, true, 1, 1, 300, 400, 3,
               DateTime.Now, new Guid("{0B677FB4-890E-4FAF-AD6A-7477D5703E6E}"), DateTime.Now);
   
               var collection = new DataServiceCollection<Product>(_context);
               collection.Add(product1);
               collection.Add(product2);
               collection.Add(product3);
               _context.SaveChanges();
   
               Console.Read();
   
               //remove products to omit unique constraint next time running this app:
               collection.Remove(product1);
               collection.Remove(product2);
               collection.Remove(product3);
               _context.SaveChanges(SaveChangesOptions.Batch);
   
               Console.WriteLine("Deleted. Sorry, changed my mind!");
               Console.Read();
   
           }
       }
   }
   

Where the following is the most important piece in the client code:

_context.SaveChanges(SaveChangesOptions.Batch);