WCF面向服务应用程序系列之一：Hello WCF
WCF全称为Windows Communication Foundation，是Microsoft平台上的SOA架构，用于构建分布式和可交互操作的应用程序。它统一ASMX, .NET Remoting, 与Enterprise Services的开发模型，为各种应用提供单一的编程模型，基于配置驱动的协议选择，消息格式，进程分配等。
开发环境：Visual Studio 2010 + NET Framework 4.0。
本章我们通过一个简单的DEMO来创建一个WCF程序。
1、打开VS2010，选择C#语言下的创建WCF程序，选中WCF Service Library，修改解决方案名称为HelloWCF与项目名称为HelloServiceLibrary，点击确定。
2、删除HelloServiceLibrary项目中生成的IService1.cs与Services1.cs文件。
3、新建IHelloWCF接口文件，代码如下：
//
OperationContract为服务契约
[ServiceContract]
public
interface
IHelloWCF
{
//
OperationContract为方法契约
[OperationContract]
string
GetMessage(
string
msg);
}
4、新建HelloWCF文件，代码如下：
public
class
HelloWCF : IHelloWCF
{
public
string
GetMessage(
string
msg)
{
return
string
.Format(
"
The server received message is : {0}
"
, msg);
}
}
5、修改HelloServiceLibrary中的App.config文件：
修改服务名称为：<service name="HelloServiceLibrary.HelloWCF">
修改端契约为：<endpoint address="" binding="wsHttpBinding" contract="HelloServiceLibrary.IHelloWCF">
修改服务地址为：<add baseAddress="http://localhost:8732/Design_Time_Addresses/HelloServiceLibrary/HelloWCF/" />
配置如下
<?
xml version
=
"
1.0
"
encoding
=
"
utf-8
"
?>
<
configuration
>
<
system.web
>
<
compilation debug
=
"
true
"
/>
</
system.web
>
<!--
When deploying the service library project, the content of the config file must be added to the host
'
s
app.config file. System.Configuration does not support config files
for
libraries.
-->
<
system.serviceModel
>
<
services
>
<
service name
=
"
HelloServiceLibrary.HelloWCF
"
>
<
endpoint address
=
""
binding
=
"
wsHttpBinding
"
contract
=
"
HelloServiceLibrary.IHelloWCF
"
>
<
identity
>
<
dns value
=
"
localhost
"
/>
</
identity
>
</
endpoint
>
<
endpoint address
=
"
mex
"
binding
=
"
mexHttpBinding
"
contract
=
"
IMetadataExchange
"
/>
<
host
>
<
baseAddresses
>
<
add baseAddress
=
"
http://localhost:8732/Design_Time_Addresses/HelloServiceLibrary/HelloWCF/
"
/>
</
baseAddresses
>
</
host
>
</
service
>
</
services
>
<
behaviors
>
<
serviceBehaviors
>
<
behavior
>
<!--
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
>
</
configuration
>
6、新建控制台应用程序Client，添加Service Reference，修改名称空间为HelloServiceLibrary。
7、在Program类中的Main函数中添加代码。
代码
static
void
Main(
string
[] args)
{
Console.WriteLine(
"
------------------HelloWCFClient Begin------------------
"
);
HelloServiceLibrary.HelloWCFClient client
=
new
HelloServiceLibrary.HelloWCFClient();
Console.WriteLine(
"
The client sent message is ：Hello WCF
"
);
Console.WriteLine(client.GetMessage(
"
Hello WCF
"
));
client.Close();
Console.WriteLine(
"
------------------HelloWCFClient End------------------
"
);
Console.ReadLine();
}
8、F5运行调试程序，在控制台上我们将看到客户端调用WCF服务端返回的结果。
------------------
HelloWCFClient Begin
------------------
The client sent message
is
：Hello WCF
The server received message
is
: Hello WCF
------------------
HelloWCFClient End
------------------
至此，一个简单的WCF应用程序创建完成了，下章将详细介绍WCF的契约设计。
作者：心海巨澜
出处：http:
//
xinhaijulan.cnblogs.com
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