WCF事务应用[转]

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在B2B的项目中，一般用户注册后，就有一个属于自己的店铺，此时，我们就要插入两张表, User和Shop表。

当然，要么插入成功，要么全失败。

第一步：首先看一下项目的结构图：

第二步：准备工作，我们新建Commerce数据库，用EF去映射,然后新建ServiceWCF类库，具体步骤就省略，

这一块不懂可以留言。

第三步：新建一个Model类库。建立两个实体类Shop和User，当然自定义类型在WCF中传输，

必须在类上加上【DataContract】，属性上加【DataMember】。

Shop.cs

1 namespace Model
2 {
3 [DataContract]
4 public class Shop
5 {
6 [DataMember]
7 public int ShopID { get; set; }
8
9 [DataMember]
10 public int UserID { get; set; }
11
12 [DataMember]
13 public string ShopName { get; set; }
14
15 [DataMember]
16 public string ShopUrl { get; set; }
17
18 }
19 }

User.cs

1 namespace Model 2 { 3 [DataContract] 4 public class User 5 { 6 [DataMember] 7 public int UserID { get; set; } 8 9 [DataMember] 10 public string UserName { get; set; } 11 12 [DataMember] 13 public string Password { get; set; } 14 } 15 }

第四步：然后在ServiceWCF类库中新建两个文件Seller.cs 和 ISeller.cs.

ISeller.cs:

1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Runtime.Serialization;
5 using System.ServiceModel;
6 using System.Text;
7
8 namespace ServiceWCF
9 {
10 [ServiceContract]
11 public interface ISeller
12 {
13 [OperationContract(Name = "AddUser")]
14 bool Add(Model.User user, out int userID);
15
16 [OperationContract(Name = "AddShop")]
17 bool Add(Model.Shop shop, out int shopID);
18
19 [OperationContract]
20 bool Add(Model.User user, Model.Shop shop);
21 }
22 }

Seller.cs

1 namespace ServiceWCF 2 { 3 public class Seller : ISeller 4 { 5 ///<summary> 6 /// User的插入操作 7 ///</summary> 8 ///<param name="user"></param> 9 ///<param name="userID"></param> 10 ///<returns></returns> 11 public bool Add(Model.User user, out int userID) 12 { 13 using (CommerceEntities db = new CommerceEntities()) 14 { 15 try 16 { 17 User userModel = new User() 18 { 19 UserName = user.UserName, 20 Passwrod = user.Password 21 }; 22 23 db.User.AddObject(userModel); 24 25 db.SaveChanges(); 26 27 userID = userModel.UserID; 28 29 return true; 30 } 31 catch (Exception) 32 { 33 userID = 0; 34 throw; 35 } 36 } 37 } 38 39 ///<summary> 40 /// Shop的插入操作 41 ///</summary> 42 ///<param name="shop"></param> 43 ///<param name="shopID"></param> 44 ///<returns></returns> 45 public bool Add(Model.Shop shop, out int shopID) 46 { 47 using (CommerceEntities db = new CommerceEntities()) 48 { 49 try 50 { 51 52 Shop shopModel = new Shop() 53 { 54 ShopName = shop.ShopName, 55 ShopUrl = shop.ShopUrl, 56 UserID = shop.UserID 57 }; 58 59 db.Shop.AddObject(shopModel); 60 61 db.SaveChanges(); 62 63 shopID = shopModel.ShopID; 64 65 return true; 66 } 67 catch (Exception) 68 { 69 shopID = 0; 70 throw; 71 } 72 } 73 } 74 75 ///<summary> 76 /// User,Shop的插入的操作 77 ///</summary> 78 ///<param name="user"></param> 79 ///<param name="shop"></param> 80 ///<returns></returns>

81 [OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)] 82 public bool Add(Model.User user, Model.Shop shop) 83 { 84 int shopID; 85 int UserID; 86 87 //注意，这个方法操作了两个数据库实例，为AddUser和AddShop。所以晋升为分布式事务 88 if (Add(user, out UserID)) 89 { 90 shop.UserID = UserID; 91 92 return Add(shop, out shopID); 93 } 94 95 return false; 96 } 97 } 98 }

TransactionScopeRequired：告诉ServiceHost自托管服务，进入我的方法，必须给我加上事务。

TransactionAutoComplete: 方法执行中，如果没有抛出异常，则自动提交。

第五步：新建Host来承载了，配置AppConfig，这些细节就不再说了。

1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5
6 namespace ServiceHost
7 {
8 class Program
9 {
10 static void Main(string[] args)
11 {
12 System.ServiceModel.ServiceHost host = new System.ServiceModel.ServiceHost(typeof(ServiceWCF.Seller));
13
14 host.Open();
15
16 Console.WriteLine("WCF 服务已经开启！");
17
18 Console.Read();
19 }
20 }
21 }

1 <?xml version="1.0" encoding="utf-8"?> 2 <configuration> 3 <system.web> 4 <compilation debug="true" /> 5 </system.web> 6  8 <system.serviceModel> 9 <services> 10 <service name="ServiceWCF.Seller"> 11 <endpoint address="" binding="wsHttpBinding" contract="ServiceWCF.ISeller"> 12 <identity> 13 <dns value="localhost" /> 14 </identity> 15 </endpoint> 16 <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> 17 <host> 18 <baseAddresses> 19 <add baseAddress="http://localhost:8732/Seller/" /> 20 </baseAddresses> 21 </host> 22 </service> 23 </services> 24 <behaviors> 25 <serviceBehaviors> 26 <behavior> 27  29 <serviceMetadata httpGetEnabled="True" /> 30  33 <serviceDebug includeExceptionDetailInFaults="False" /> 34 </behavior> 35 </serviceBehaviors> 36 </behaviors> 37 </system.serviceModel> 38 <connectionStrings> 39 <add name="CommerceEntities" connectionString="metadata=res://*/Commerce.csdl|res://*/Commerce.ssdl|res://*/Commerce.msl;provider=System.Data.SqlClient;provider connection string="Data Source=VONXCEVF0IT7JDJ;Initial Catalog=Commerce;Integrated Security=True;MultipleActiveResultSets=True"" providerName="System.Data.EntityClient" /> 40 </connectionStrings> 41 </configuration>

第六步：开启WCF服务，新建ServiceClient类库，然后用信道生成实例。

1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.ServiceModel;
6 using ServiceWCF;
7
8 namespace ServiceClient
9 {
10 class Program
11 {
12 static void Main(string[] args)
13 {
14 var user = new Model.User()
15 {
16 UserName = "huangxincheng520",
17 Password = "i can fly"
18 };
19
20 var shop = new Model.Shop()
21 {
22 ShopName = "shopex",
23 ShopUrl = "http://www.shopex.cn"
24 };
25
26 var factory = new ChannelFactory<ISeller>(new WSHttpBinding(),

new EndpointAddress("http://localhost:8732/Seller/"));
27
28 var client = factory.CreateChannel();
29
30 if (client.Add(user, shop))
31 Console.WriteLine("huangxincheng520, 恭喜你，数据插入成功。");
32 else
33 Console.WriteLine("huangxincheng520, 呜呜，数据插入失败。");
34
35 Console.Read();
36 }
37 }
38 }

最后就是测试了：

首先：走正常流程。client.Add方法调用服务器端，运行效果如图所示：

是的，数据已经正常插入成功，对Client端而言，这个操作是透明的。

然后：我们在Seller类中的Add方法中故意加入异常。看效果咋样。

1 ///<summary> 2 /// User,Shop的插入的操作 3 ///</summary> 4 ///<param name="user"></param> 5 ///<param name="shop"></param> 6 ///<returns></returns> 7 [OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)] 8 public bool Add(Model.User user, Model.Shop shop) 9 { 10 int shopID; 11 int UserID; 12 13 if (Add(user, out UserID)) 14 { 15 //注意注意，我在Adduser成功的情况下，抛出异常，看是否回滚。 16 throw new Exception(); 17 18 shop.UserID = UserID; 19 20 return Add(shop, out shopID); 21 } 22 23 return false; 24 }

截图如下：