http://www.cnblogs.com/yiyisawa/archive/2008/12/16/1356191.html
问题： 假设有一个大型系统新版本使用wcf 作为服务端，生成wcf client 调用可以调用正常。 那如果当wcf 服务端出现问题或其他的原因我想再用回以前老版本的webservice或是jms server ，但客户端调用还是通过wcf client 调用。只通过更改配置来实现。
一、web service项目，添加一个普通service class .代码如下：
Code
[WebService(Namespace="http://Microsoft.ServiceModel.Samples")]
public class CalculatorService : System.Web.Services.WebService
{
[WebMethod]
public double Add(double n1, double n2)
{
return n1 + n2;
}
[WebMethod]
public double Subtract(double n1, double n2)
{
return n1 - n2;
}
[WebMethod]
public double Multiply(double n1, double n2)
{
return n1 * n2;
}
[WebMethod]
public double Divide(double n1, double n2)
{
return n1 / n2;
}
}
webservice配置文件无需更改。运行。记录服务地址。
二、打开路径C:Program FilesMicrosoft SDKsWindowsv6.0Ain：找到svcutil.exe文件。开始菜单-->run --> input cmd --->cd C:Program FilesMicrosoft SDKsWindowsv6.0Ain -->回车;
输入svcutil http://localhost:8080/service/service.asmx,将会在C:Program FilesMicrosoft SDKsWindowsv6.0Ain生成一个webservice的代理类。注意：此代理类是wcf client形式的。（在后面只需将这个代理类小作改动，便可用于wcf sevice.）
生成的代理类：
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:2.0.50727.3053
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.ServiceContractAttribute(Namespace = "http://Microsoft.ServiceModel.Samples", ConfigurationName = "CalculatorServiceSoap")]
public interface CalculatorServiceSoap
{
[System.ServiceModel.OperationContractAttribute(Action = "http://Microsoft.ServiceModel.Samples/Add", ReplyAction = "*")]
double Add(double n1, double n2);
[System.ServiceModel.OperationContractAttribute(Action = "http://Microsoft.ServiceModel.Samples/Subtract", ReplyAction = "*")]
double Subtract(double n1, double n2);
[System.ServiceModel.OperationContractAttribute(Action = "http://Microsoft.ServiceModel.Samples/Multiply", ReplyAction = "*")]
double Multiply(double n1, double n2);
[System.ServiceModel.OperationContractAttribute(Action = "http://Microsoft.ServiceModel.Samples/Divide", ReplyAction = "*")]
double Divide(double n1, double n2);
}
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public interface CalculatorServiceSoapChannel : CalculatorServiceSoap, System.ServiceModel.IClientChannel
{
}
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public partial class CalculatorServiceSoapClient : System.ServiceModel.ClientBase<CalculatorServiceSoap>, CalculatorServiceSoap
{
public CalculatorServiceSoapClient()
{
}
public CalculatorServiceSoapClient(string endpointConfigurationName)
:
base(endpointConfigurationName)
{
}
public CalculatorServiceSoapClient(string endpointConfigurationName, string remoteAddress)
:
base(endpointConfigurationName, remoteAddress)
{
}
public CalculatorServiceSoapClient(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress)
:
base(endpointConfigurationName, remoteAddress)
{
}
public CalculatorServiceSoapClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress)
:
base(binding, remoteAddress)
{
}
public double Add(double n1, double n2)
{
return base.Channel.Add(n1, n2);
}
public double Subtract(double n1, double n2)
{
return base.Channel.Subtract(n1, n2);
}
public double Multiply(double n1, double n2)
{
return base.Channel.Multiply(n1, n2);
}
public double Divide(double n1, double n2)
{
return base.Channel.Divide(n1, n2);
}
}
三、添加Console Application,将上面生成的代理类加入项目中，并在Main方法中调用。
Service1Clients client = new Service1Clients();
// Service1Client client = new Service1Client();
// Call the Add service operation.
double value1 = 100.00D;
double value2 = 15.99D;
double result = client.Add(value1, value2);
Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);
// Call the Subtract service operation.
value1 = 145.00D;
value2 = 76.54D;
result = client.Subtract(value1, value2);
Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);
// Call the Multiply service operation.
value1 = 9.00D;
value2 = 81.25D;
result = client.Multiply(value1, value2);
Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);
// Call the Divide service operation.
value1 = 22.00D;
value2 = 7.00D;
result = client.Divide(value1, value2);
Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);
//Closing the client gracefully closes the connection and cleans up resources
client.Close();
Console.WriteLine();
Console.WriteLine("Press <ENTER> to terminate client.");
Console.ReadLine();
添加配置文件：App.config.此配置文件在二步生成代理类的时候会有Out.config同时产生。config里面的内容拷过来即可。
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="CalculatorServiceSoap" closeTimeout="00:01:00"
openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
useDefaultWebProxy="true">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<security mode="None">
<transport clientCredentialType="None" proxyCredentialType="None"
realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost:8080/service/service.asmx"
binding="basicHttpBinding"
contract="IService1" name="IService1" />
</client>
</system.serviceModel>
将webservice运行起来，（也可host到iis 里去。）debug console application.即可看到结果。
回家吃饭了。
细节和要注意的地方在第二节中写出来。
项目下载地址:http://files.cnblogs.com/yiyisawa/wcfclienttowebservice.rar