WCF 簡易教學

公司希望有WCF當中介程式，隔離資料庫，這對習慣Web API的我們，有點對WCF生疏，所以寫了些簡單的教學，一方面怕自己有點生疏，另一方面給有需要的朋友們，減少學習的時間。

一、建立介面的宣告

在介面函式上輸入關鍵字『OperationContract』，這樣端點的服務

能搜尋到此宣告的函式，另外如果需要宣告物件時，該類別要宣告關鍵字『DataContract』，類別的屬性宣告『DataMember』

[ServiceContract]     public interface IService1     {         [OperationContract]         IEnumerable<tempCalendar> readGoogleData(int intStartIkey, int intEndIkey);         [OperationContract]         bool writeGoogleData(tempCalendar updateData);     } [DataContract]     public class tempCalendar     {         [DataMember]         public int ikey         {             get;             set;         }         [DataMember]         public string sendParameter         {             get;             set;         }          }

二、  實作介面的類別

用ＥntitySQL 的linq語法去讀取資料庫的資料和寫入資料庫的資料，直接

回傳IEnumerable型別，就因為取回的資料只是用來查詢， 會有較佳的執行速度

public class Service1 : IService1     {         GoogleEntities googleEntityObj = new GoogleEntities();         public IEnumerable<tempCalendar> readGoogleData(int intStartIkey, int intEndIkey)         {                 IEnumerable<tempCalendar> tempCalendarList = from c in googleEntityObj.Calendar                      Where  c.ikey >= intStartIkey && c.ikey <= intEndIkey                                        select new tempCalendar                                           {                                              ikey=c.ikey,                                               sendParameter=c.上傳參數                                           };                 return tempCalendarList;         }         public bool writeGoogleData(tempCalendar updateData)         {                 var original = googleEntityObj.Calendar.Find(updateData.ikey);                 original.上傳完成 = updateData.isSendGoogleOK;                 original.結果訊息 = updateData.sendMessage;;                 googleEntityObj.SaveChanges();                 return true;         }     }

三、  設定web.config

<system.serviceModel>     <bindings>       <basicHttpBinding> <!--預設允許大量傳輸 -->         <binding name="cusBinding" maxBufferSize="64000000" maxReceivedMessageSize="64000000"   />       </basicHttpBinding>     </bindings>     <client> <!--連線端口設為basicHttpBinding 具名管線，  -->       <endpoint binding="basicHttpBinding" bindingConfiguration="cusBinding" contract="WcfService1.IService1"/>     </client>     <services>       <service name="WcfService1.Service1" >         <endpoint address="" binding="basicHttpBinding" bindingConfiguration="cusBinding" contract="WcfService1.IService1" />       </service>     </services>     <behaviors>       <serviceBehaviors>         <behavior name="">           <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>           <serviceDebug includeExceptionDetailInFaults="false"/> <!--預設連線數允許到100 -->           <serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="50" maxConcurrentInstances="50" />         </behavior>       </serviceBehaviors>     </behaviors>     <protocolMapping>       <add binding="basicHttpsBinding" scheme="https"/>     </protocolMapping>     <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>   </system.serviceModel>

四、  如何呼叫service

先透過vs2012的tool 視窗，執行svcutil.exe  service.svc的位址，自

動產生檔案到 c:\programe(X86)\ Microsoft Visual Studio 12.0, 將2個檔案加入到呼叫service的程式專案

以下示範如何呼叫服務

public IEnumerable<tempCalendar> serviceReadGoogleData(int intStartIkey, int intEndIkey)         {             try             {                 BasicHttpBinding myBinding = new BasicHttpBinding();                 EndpointAddress myEndpoint = new EndpointAddress("http://192.168.1.63/googleService/service1.svc");                 ChannelFactory<IService1> myChannelFactory = new ChannelFactory<IService1>(myBinding, myEndpoint);                 IService1 wcfClient1 = myChannelFactory.CreateChannel();                return wcfClient1.readGoogleData(intStartIkey, intEndIkey);             }             catch (Exception ex)             {                 throw new Exception(ex.Message);             }         }

五、  設定web協定

服務的介面要改成GET或POST等協定，可以依自己的習慣修改網址的傳遞

參數的模式

IService.svc

[OperationContract]     [WebInvoke(Method = "GET", UriTemplate = "writeToGoogleCalendar/orgIkey/{orgIkey}", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]     bool writeToGoogleCalendar(string orgIkey);

Service.svc.cs

public bool writeToGoogleCalendar(string orgIkey)         {             return true;         }

修改Web.config

<system.serviceModel>     <bindings>     </bindings>     <client>       <endpoint binding="webHttpBinding" bindingConfiguration="" contract="WcfService1.IService1" />     </client>     <services>       <service name="WcfService1.Service1">         <endpoint address="" behaviorConfiguration="webBehavior" binding="webHttpBinding"           bindingConfiguration="" contract="WcfService1.IService1" />       </service>     </services>     <behaviors>       <endpointBehaviors>         <behavior name="webBehavior">           <webHttp />         </behavior>       </endpointBehaviors>       <serviceBehaviors>         <behavior name="">           <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />           <serviceDebug includeExceptionDetailInFaults="false" />           <serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="50"             maxConcurrentInstances="50" />         </behavior>       </serviceBehaviors>     </behaviors>

呼叫WCF網址:

六、  參考文獻

1.    https://social.msdn.microsoft.com/Forums/vstudio/en-US/2df5458f-3b83-4fb7-9761-bb6d359450a7/wcf-client-connection-limits-?forum=wcf