通常在客户端访问WCF服务时，都需要添加服务引用，然后在客户端app.config或 web.config文件中产生WCF服务的客户端配置信息。若是每添加一个服务都是这样做，这样势必会将比较麻烦，能否简单在app.config或 web.config文件增加WCF服务地址，然后直接通过此地址访问WCF服务呢？可以，那就是通过自定义客户端代理类来实现。本文是通过继承 ClientBase<T>类实现的自定义客户端代理类，来实现同过简单在app.config或web.config文件增加wcf服务 地，然后直接通过此地址访问WCF服务。
以下以一个简单的计算器WCF服务为例：
解决方案项目目录结构：
其中WCFExample.ServiceInterface项目是WCF服务接口、WCFExample.ServiceImplement项目是 WCF服务实现、WCFExample.Host项目是服务宿主、WCFExample.ServiceClient项目自定义WCF服务客户端代理、 WCFExample.ServiceClientTest项目是客户端测试
WCF服务接口定义
[ServiceContract]
public interface ICalculator
{
[OperationContract]
decimal Add(decimal a, decimal b);
}
WCF服务接口实现
public class Calculator : ICalculator
{
public decimal Add(decimal a, decimal b)
{
return a + b;
}
}
WCF服务客户端自定义代理类
internal class CalculatorClient : ClientBase<ICalculator>,ICalculator
{
public CalculatorClient(Binding binding, EndpointAddress remoteAddress):base(binding,remoteAddress)
{
}
public decimal Add(decimal a,decimal b)
{
return base.Channel.Add(a, b);
}
}
服务创建工厂
internal class ServiceFactory
{
public ICalculator GetCalculatorClient(string remotingAddress)
{
if(string.IsNullOrEmpty(remotingAddress))
{
return null;
}
try
{
return new CalculatorClient(this.GetInitBinding(), new EndpointAddress(remotingAddress));
}
catch
{
return null;
}
}
public ICalculator GetCalculatorClient(string remotingAddress, Binding binding)
{
if (string.IsNullOrEmpty(remotingAddress))
{
return null;
}
try
{
return new CalculatorClient(binding, new EndpointAddress(remotingAddress));
}
catch
{
return null;
}
}
private BasicHttpBinding GetInitBinding()
{
BasicHttpBinding binding = new BasicHttpBinding();
binding.MaxBufferSize = 0x27100000;
binding.MaxReceivedMessageSize = 0x27100000L;
binding.MaxBufferPoolSize = 0x138800000L;
XmlDictionaryReaderQuotas quotas = new XmlDictionaryReaderQuotas();
quotas.MaxStringContentLength = 0x4e20000;
binding.ReaderQuotas = quotas;
return binding;
}
}
对外服务代理类
public class ServiceProxy
{
private ICalculator m_ICalculator;
public ServiceProxy(string remotingAddress)
{
m_ICalculator = new ServiceFactory().GetCalculatorClient(remotingAddress);
}
public ServiceProxy(string remotingAddress,Binding binding)
{
m_ICalculator = new ServiceFactory().GetCalculatorClient(remotingAddress, binding);
}
public decimal Add(decimal a,decimal b)
{
return m_ICalculator.Add(a, b);
}
}
客户端web.config增加服务地址
<appSettings>
<add key="WCFAddress" value="http://wcf.test.com/Calculator.svc%22/>
</appSettings>
客户端调用
decimal a = 10;
decimal b = 20;
string url = System.Configuration.ConfigurationManager.AppSettings["WCFAddress"];
ServiceProxy serviceProxy = new ServiceProxy(url);
Response.Write(serviceProxy.Add(a,b));