Question

我有三个表，Template，Fields和TemplateFields。 TemplateFields保存每个模板的选定字段。我需要在用户选择完字段后更新TemplateFields。我能看到的唯一方法是删除该模板的所有TemplateFields，然后在不同的请求中逐个添加它们。这真的很糟糕，因为没有交易可以回退，也会有很多请求。

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Interceptor来更新数据库。

Answer 1

请参阅此文章“向OData / Wcf数据服务批处理添加/创建数据”：

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

<强>更新

文章已移至：
http://www.fcodings.com/2010/06/18/addingcreating-data-to-odatawcf-data-service-batch-explained/

根据评论中的要求从帖子中引用

服务

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);
        }

    }
}

客户端

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();

        }
    }
}

以下是客户代码中最重要的部分：

_context.SaveChanges(SaveChangesOptions.Batch);

使用jQuery和OData更新/插入多行（WCF数据服务）

1 个答案: