转（详见）：http://social.msdn.microsoft.com/Forums/en-US/wcf/thread/1bad2198-65cb-445d-84cb-1fae17828eef

分以下几步骤：
1、VS2008创建WCF服务项目
2、配置服务接口UriTemplate
   [OperationContract]
        [WebGet(UriTemplate = "/Tests/{sValue}", ResponseFormat = WebMessageFormat.Json)]
        string GetData(string sValue);
3、配置WebConfig，例：

<system.serviceModel>
    <services>
      <service behaviorConfiguration="BA.Services.SiteGetNewsServiceBehavior" name="BA.Services.SiteGetNewsService">
        <endpoint address="" behaviorConfiguration="WebHttp" binding="webHttpBinding"
          bindingConfiguration="" contract="BA.Services.ISiteGetNewsService" />
      </service> 
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="BA.Services.SiteGetNewsServiceBehavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>

      <endpointBehaviors>
        <behavior name="WebHttp">
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
  </system.serviceModel>

4、配置*.svc服务标记：
   <%@ ServiceHost Language="C#" Debug="true" Service="Rest4Func.Service1" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>

5、测试服务：http://***/Service1.svc/tests/定义参数，弹出一个文件保存
6、实例(项目中以Service1.svc为例)：/Files/lmjob/WcfRest.rar

附：.Net2.0创建Rest服务代码：
/Files/lmjob/RESTService.zip