曾用.NET
Remoting,基於IIS,為公司實現過分布式多層架構,客戶端采用Web Browser瀏覽,當時,公司領導告訴我可能會有多臺中間服務器用於系統,又不想每臺電腦的去安裝程序,所以,我最后采用了.NET Remtoing來實現分布式,可直到如今,我也沒有看到有購置多臺中間服務器,哪怕多臺Web服務器的可能性。不過,功能咱是實現了,只要有了機器,俺就用上。先不管他,上博客園來看看,這一看,就看到张逸
和 赵颉兩位牛人的“你知道什么是WCF嗎”的訪談錄,看完之后,對於WCF也就躍躍欲試,於是結合张逸以及博客园另一位牛人artech(都是MVP,羨慕中…..)介紹的內容, 加上本人對於Remoting的開發也有一點功底,於是也就沒有花多少時間,鼓搗出以下這個自己號稱目前最先進的基於IIS的WCF的分布式多層開發架構。
至於WCF的相關知識,咱也不說什么,张逸和Artech這兩位牛人說得已經很是明白了,各位可以通過上面的鏈接去他們的博客上學習啦,不過,感覺有Remoting開發經驗的,對於WCF的相關概念應該不是很難理解。
下面還是用代碼來說明一下(由於這家公司的經理要求使用VB來做,我只好放棄用了近兩年的C#的而改用VB了。還好現在基本上兩種都不會混了,也算是間接的掌握了一門新語言吧,喜歡看C#的朋友就請多擔待,或者留言,本人考盧是否提供一份C#的實現。呵呵:))
1、首先從整體來看這個架構,這個架構的圖示大約如下,共包括了6個專案,大概從專案名稱應該也可看出其主要用途了:
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HL.EntityReflect.Osp專案實現是實體對象化。HL.Shared.Osp就是WCF的Contract了,於了Remoting來說,就是一個建議在Server端實現的接口了,其實為了安全性著想,對於WCF,本人也建議使用接口,在Server端實現。HL.Business.Osp就是我們常說的邏輯業務層,它主要負責調用HL.DALSQLServer.Osp真正實現了HL.Shared.Osp的方法。最后兩個HL.Service和HL.Win不用我說,各位也可想到一個是IIS Host的WCF及客戶端的Winform程序了。
上面簡單介紹了各個專案的用途了,下面我們來分步用VB實現:
2、建立實體對象:
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EREmployee
Imports System
Imports System.Runtime.Serialization
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'/ <summary>
'/ Summary description for EREmployee.
'/ </summary>
<Serializable()> _
<DataContract()> _
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Public Class EREmployeeClass EREmployee
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Public Sub New()Sub New()
End Sub
Private _strbs_no As String
Private _strbs_name As String
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<DataMember()> _
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Public Property strBS_NO()Property strBS_NO() As String
Get
Return Me._strbs_no
End Get
Set(ByVal value As String)
Me._strbs_no = value
End Set
End Property
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<DataMember()> _
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Public Property strBS_NAME()Property strBS_NAME() As String
Get
Return Me._strbs_name
End Get
Set(ByVal value As String)
Me._strbs_name = value
End Set
End Property
End Class
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這個基於工具也可產生,網上大把。只是要註意的是,要能在WCF中傳遞的實體,必須是可序列化和序列化了的實體,在Remoting中我們需要在類前面冠上<Serializable()> _這種形式的編程即可,同樣在WCF中我們使用的是<DataContract()> _,然后在屬性前面也加上<DataMember()> _聲明。
3、同樣,我們再接著建立一個Contract,引用第二步建立的實體對象。我們使用類似下面的代碼,這里同樣運用了聲明式的編程方式。各位可以自行比較這些代碼跟我們常用的代碼的寫法的差異。
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IEmployee
Imports System
Imports System.ServiceModel
Imports HL.EntityReflect.Osp
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'/ <summary>
'/ Summary description for IEmployee.
'/ </summary>
<CLSCompliant(False)> _
<ServiceContract()> _
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Public Interface IEmployeeInterface IEmployee
<OperationContract()> _
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Function Query()Function Query() As EREmployee()
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<OperationContract()> _
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Sub Add()Sub Add(ByVal er As EREmployee)
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<OperationContract()> _
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Sub Modify()Sub Modify(ByVal er As EREmployee, ByVal strBS_NO As String, ByVal strBS_Name As String)
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<OperationContract()> _
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Sub Del()Sub Del(ByVal er As EREmployee)
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<OperationContract()> _
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Function fAdd()Function fAdd(ByVal intX As Integer, ByVal intY As Integer) As Integer
End Interface
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4、這一步實現很關鍵,能否使用WCF成功,這一步至關重要,我們把對應的類繼承於ClientBase,並實現了HL.Shared.Osp,當然真實方法我們在另一個專案中實現,這里算是一個引子吧,權當我曾經好像看過某位牛人(如果沒有記錯應該也是上面張先生寫的一篇文章。關於Remoting的)說的.net下Remoting的欺騙吧。你把他當做欺騙也好,什么也好,只是我需要指明的是這個很重要,代碼如下:
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BLEmployee
Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports HL.EntityReflect.Osp
Imports HL.Shared.Osp
Imports System.Data.SqlClient
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Public Class BLEmployeeClass BLEmployee
Inherits ClientBase(Of IEmployee)
Implements IEmployee
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Public Sub New()Sub New()
MyBase.New()
End Sub
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Public Sub New()Sub New(ByVal endpointConfigurationName As String)
MyBase.New(endpointConfigurationName)
End Sub
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Public Sub Add()Sub Add(ByVal er As EREmployee) Implements IEmployee.Add
Channel.Add(er)
End Sub
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Public Sub Del()Sub Del(ByVal er As EREmployee) Implements IEmployee.Del
Channel.Del(er)
End Sub
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Public Sub Modify()Sub Modify(ByVal er As EREmployee, ByVal strBS_NO As String, ByVal strBS_Name As String) Implements IEmployee.Modify
Channel.Modify(er, strBS_NO, strBS_Name)
End Sub
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Public Function Query()Function Query() As EREmployee() Implements IEmployee.Query
Return Channel.Query()
End Function
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Public Function fAdd()Function fAdd(ByVal intX As Integer, ByVal intY As Integer) As Integer Implements IEmployee.fAdd
Return Channel.fAdd(intX, intY)
End Function
End Class
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當然,如果我想實現數據庫類型的切換,我以前用Remoting的時候,就在這個類中做手腳,但關於WCF卻感覺無從下手,如果哪位知道,請留言指教,不勝感激。
5、收尾一下4步中遺留的真正實現方法,不多說,直接看代碼:
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SQLDaoEmployee
Imports System.Data
Imports System.Data.SqlClient
Imports System.Text
Imports HL.EntityReflect.Osp
Imports HL.Shared.Osp
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Public Class SQLDaoEmployeeClass SQLDaoEmployee
Implements IEmployee
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Public ReadOnly Property strConn()Property strConn() As String
Get
Return Configuration.ConfigurationManager.AppSettings("strConnectNorthWind")
End Get
End Property
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Public Sub Add()Sub Add(ByVal er As EREmployee) Implements IEmployee.Add
Dim strSql As String = "Insert Into Employee(BS_NO,BS_NAME) Values(@BS_NO,@BS_NAME)"
Using Conn As New SqlConnection(strConn)
Using Comm As New SqlCommand(strSql, Conn)
Comm.Parameters.Add(New SqlParameter("@BS_NO", SqlDbType.VarChar, 10))
Comm.Parameters.Add(New SqlParameter("@BS_NAME", SqlDbType.VarChar, 20))
Comm.Parameters("@BS_NO").Value = er.strBS_NO
Comm.Parameters("@BS_NAME").Value = er.strBS_NAME
Conn.Open()
Comm.ExecuteNonQuery()
Conn.Close()
End Using
End Using
End Sub
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Public Sub Del()Sub Del(ByVal er As EREmployee) Implements IEmployee.Del
Dim strSql As String = "Delete from Employee where BS_NO ='" & er.strBS_NO & "' and BS_NAME='" & er.strBS_NAME & "'"
Using Conn As New SqlConnection(strConn)
Using Comm As New SqlCommand(strSql, Conn)
Conn.Open()
Comm.ExecuteNonQuery()
Conn.Close()
End Using
End Using
End Sub
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Public Sub Modify()Sub Modify(ByVal er As EREmployee, ByVal strBS_NO As String, ByVal strBS_Name As String) Implements IEmployee.Modify
Dim strSql As String = " update Employee set BS_NO='" & strBS_NO & "', BS_NAME= '" & strBS_Name & _
"' where BS_NO ='" & er.strBS_NO & "' and BS_NAME='" & er.strBS_NAME & "'"
Using Conn As New SqlConnection(strConn)
Using Comm As New SqlCommand(strSql, Conn)
Conn.Open()
Comm.ExecuteNonQuery()
Conn.Close()
End Using
End Using
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End Sub
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Public Function Query()Function Query() As EREmployee() Implements IEmployee.Query
Dim lst As New List(Of EREmployee)()
Dim strSql As String = "Select * From Employee"
Using Conn As New SqlConnection(strConn)
Using Comm As New SqlCommand(strSql, Conn)
Conn.Open()
Dim Reader As SqlDataReader = Comm.ExecuteReader()
While Reader.Read()
Dim er As New EREmployee()
er.strBS_NO = DirectCast(Reader("BS_NO"), String)
er.strBS_NAME = DirectCast(Reader("BS_NAME"), String)
lst.Add(er)
End While
Conn.Close()
End Using
End Using
Return lst.ToArray()
End Function
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Public Function fAdd()Function fAdd(ByVal intX As Integer, ByVal intY As Integer) As Integer Implements IEmployee.fAdd
Return intX + intY
End Function
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End Class
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6、至此我們,可以開始配置,基於IIS的WCF服務端了。請看配置文件
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WCF Service
<?xml version="1.0"?>
<!--
Note: As an alternative to hand editing this file you can use the
web admin tool to configure settings for your application. Use
the Website->Asp.Net Configuration option in Visual Studio.
A full list of settings and comments can be found in
machine.config.comments usually located in
\Windows\Microsoft.Net\Framework\v2.x\Config
-->
<configuration>
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<configSections>
<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>
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<system.serviceModel>
<services>
<service name="HL.DALSQLServer.Osp.SQLDaoEmployee" behaviorConfiguration="ServiceBehavior">
<!-- Service Endpoints -->
<endpoint address="" binding="basicHttpBinding" contract="HL.Shared.Osp.IEmployee">
<!--
Upon deployment, the following identity element should be removed or replaced to reflect the
identity under which the deployed service runs. If removed, WCF will infer an appropriate identity
automatically.
-->
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="ServiceBehavior">
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true"/>
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
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<appSettings>
<add key ="strConnectNorthWind" value ="Data Source=dg;Initial Catalog=Northwind;User ID=sa;Password="/>
</appSettings>
<connectionStrings/>
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<system.web>
<!--
Set compilation debug="true" to insert debugging
symbols into the compiled page. Because this
affects performance, set this value to true only
during development.
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Visual Basic options:
Set strict="true" to disallow all data type conversions
where data loss can occur.
Set explicit="true" to force declaration of all variables.
-->
<compilation debug="false" strict="false" explicit="true">
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<assemblies>
<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
</assemblies>
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</compilation>
<pages>
<namespaces>
<clear />
<add namespace="System" />
<add namespace="System.Collections" />
<add namespace="System.Collections.Specialized" />
<add namespace="System.Configuration" />
<add namespace="System.Runtime.Serialization" />
<add namespace="System.ServiceModel" />
<add namespace="System.Text" />
<add namespace="System.Text.RegularExpressions" />
<add namespace="System.Linq" />
<add namespace="System.Web" />
<add namespace="System.Web.Caching" />
<add namespace="System.Web.SessionState" />
<add namespace="System.Web.Security" />
<add namespace="System.Web.Profile" />
<add namespace="System.Web.UI" />
<add namespace="System.Web.UI.WebControls" />
<add namespace="System.Web.UI.WebControls.WebParts" />
<add namespace="System.Web.UI.HtmlControls" />
</namespaces>
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<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls>
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</pages>
<!--
The <authentication> section enables configuration
of the security authentication mode used by
ASP.NET to identify an incoming user.
-->
<authentication mode="Windows" />
<!--
The <customErrors> section enables configuration
of what to do if/when an unhandled error occurs
during the execution of a request. Specifically,
it enables developers to configure html error pages
to be displayed in place of a error stack trace.
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<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<error statusCode="403" redirect="NoAccess.htm" />
<error statusCode="404" redirect="FileNotFound.htm" />
</customErrors>
-->
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<httpHandlers>
<remove verb="*" path="*.asmx"/>
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
</httpHandlers>
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</httpModules>
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</system.web>
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<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" warningLevel="4"
type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<providerOption name="CompilerVersion" value="v3.5"/>
<providerOption name="WarnAsError" value="false"/>
</compiler>
<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4"
type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<providerOption name="CompilerVersion" value="v3.5"/>
<providerOption name="OptionInfer" value="true"/>
<providerOption name="WarnAsError" value="false"/>
</compiler>
</compilers>
</system.codedom>
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<system.web.extensions>
<scripting>
<webServices>
<!--
Uncomment this section to enable the authentication service. Include
requireSSL="true" if appropriate.
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<authenticationService enabled="true" requireSSL = "true|false"/>
-->
<!--
Uncomment these lines to enable the profile service, and to choose the
profile properties that can be retrieved and modified in ASP.NET AJAX
applications.
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<profileService enabled="true"
readAccessProperties="propertyname1,propertyname2"
writeAccessProperties="propertyname1,propertyname2" />
-->
<!--
Uncomment this section to enable the role service.
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<roleService enabled="true"/>
-->
</webServices>
<!--
<scriptResourceHandler enableCompression="true" enableCaching="true" />
-->
</scripting>
</system.web.extensions>
<!--
The system.webServer section is required for running ASP.NET AJAX under Internet
Information Services 7.0. It is not necessary for previous version of IIS.
-->
<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
<add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</modules>
<handlers>
<remove name="WebServiceHandlerFactory-Integrated"/>
<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode"
type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode"
type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</handlers>
</system.webServer>
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</configuration>
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這個配置文件是2008自動生成的,我沒有做更改,其實,你只需要更改的是<system.serviceModel>這個Selection。當然,在<appSettings>塊中需改動你的數據庫連接字串,這個其實,也不需要我提醒嘍。然后新建一個Svc文件,該文件指明使用的語言和Service的名稱即可,只要一行即可:<%@ ServiceHost
Language="VB"
Debug="true"
Service="HL.DALSQLServer.Osp.SQLDaoEmployee"%>
7、至此,你已經在IIS服務端配置文件憶寫好,剩下就是去的IIS中配置了,這一步,跟平常配置Web程序一樣,沒多大分別。
8、好了,開始寫客戶端程序吧,這個其實很簡單,我也不說什么註意事項了,直接看代碼吧:
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FrmEmployee
Imports HL.EntityReflect.Osp
Imports HL.Business.Osp
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Public Class FrmEmployeeClass FrmEmployee
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Private strBS_NO As String = Nothing
Private strBS_NAME As String = Nothing
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Private Sub btnQuery_Click()Sub btnQuery_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnQuery.Click
Try
Dim proxy As BLEmployee = New BLEmployee("EmployeeEndpoint")
Dim dataER As EREmployee() = proxy.Query()
Me.dgvEmployee.DataSource = dataER
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
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Private Sub btnDelete_Click()Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
Try
Dim proxy As New BLEmployee("EmployeeEndpoint")
Dim model As New EREmployee()
model.strBS_NO = tbxBS_NO.Text.Trim()
model.strBS_NAME = tbxBS_NAME.Text.Trim()
proxy.Del(model)
MessageBox.Show("Delete OK, please query again to see result!")
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
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Private Sub btnAdd_Click()Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Try
Dim proxy As New BLEmployee("EmployeeEndpoint")
Dim model As New EREmployee()
model.strBS_NO = tbxBS_NO.Text.Trim()
model.strBS_NAME = tbxBS_NAME.Text.Trim()
proxy.Add(model)
MessageBox.Show("Add OK, please query again to see result!")
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
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Private Sub btnModify_Click()Sub btnModify_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnModify.Click
Try
Dim proxy As New BLEmployee("EmployeeEndpoint")
Dim model As New EREmployee()
model.strBS_NO = strBS_NO
model.strBS_NAME = strBS_NAME
proxy.Modify(model, tbxBS_NO.Text.Trim(), tbxBS_NAME.Text.Trim())
MessageBox.Show("Modify OK, please query again to see result!")
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
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Private Sub btnCalculate_Click()Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Try
Dim proxy As BLEmployee = New BLEmployee("EmployeeEndpoint")
Me.tbxBS_NO.Text = String.Format("{0} + {1} ={2}", 1, 2, proxy.fAdd(1, 2))
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
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Private Sub dgvEmployee_SelectionChanged()Sub dgvEmployee_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles dgvEmployee.SelectionChanged
Try
strBS_NO = dgvEmployee.Item(0, dgvEmployee.CurrentRow.Index).Value
strBS_NAME = dgvEmployee.Item(1, dgvEmployee.CurrentRow.Index).Value
tbxBS_NO.Text = strBS_NO
tbxBS_NAME.Text = strBS_NAME
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
End Sub
End Class
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配置文件也只需注意<system.serviceModel>塊即可.如下所示:
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WCFWin
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel >
<client>
<endpoint name="EmployeeEndpoint" address="http://localhost/HL.Service/SvcEmployee.svc" binding="basicHttpBinding" contract="HL.Shared.Osp.IEmployee"/>
</client>
</system.serviceModel>
<system.diagnostics>
<sources>
<!-- This section defines the logging configuration for My.Application.Log -->
<source name="DefaultSource" switchName="DefaultSwitch">
<listeners>
<add name="FileLog"/>
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSwitch" value="Information" />
</switches>
<sharedListeners>
<add name="FileLog"
type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
initializeData="FileLogWriter"/>
<!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
</sharedListeners>
</system.diagnostics>
</configuration>
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9、說明一下,這個演示中的Demo使用的數據庫文件其實跟我去年寫的一篇WinForm下多层架构的实现使用的是同一個,當然,你也可以在下載專案的HL.Win找到,名稱為: Employee.txt,另外,本人的文筆不怎樣,沒法寫出很漂亮的文章出來,這也是為什么好久沒有寫博客的原因,尤其是這種帶有技朮性的文章。所以,說的不對或不好的地方,望諒解,當然,如果這篇文章能給你學習WCF帶來一點啟發或幫助,那麼也就不枉了我寫這篇文章的初衷了。
程序源文件下載
Kingna(jinliangliu#163.com)
2008/4/9於博客園
歡迎轉載,轉載請保留以上信息
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