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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Ｅ ntitySQL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 >

< binding name =
cusBinding maxBufferSize = 64000000 maxReceivedMessageSize = 64000000 />

</ basicHttpBinding >

</ bindings >

< client >

< 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 />

< 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 ( );

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 = , UriTemplate = , 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

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WCF 簡易教學