1. 配置 IIS 绑定 IP地址
2. 在 SL 中引用 WebService
3. 在需要调用 WebService 的地方写下列代码:
WCF :
BasicHttpBinding basicBinding = new BasicHttpBinding();
CustomBinding binding = new CustomBinding(basicBinding);
BindingElement binaryElement = new BinaryMessageEncodingBindingElement();
// 删除原来 Elements 集合内的 TextMessageEncodingBindingElement
binding.Elements.Remove(binding.Elements[0]);
// 添加 BinaryMessageEncodingBindingElement
binding.Elements.Insert(0, binaryElement);
// wcf 地址
EndpointAddress endPoint = new EndpointAddress("http://172.168.1.100/DynamicInvokeWCF.Web/DynWCF.svc");
// 创建 wcf 客户端
DynWCFClient client = (DynWCFClient)Activator.CreateInstance(typeof(DynWCFClient), binding, endPoint);client.DoWorkCompleted += new EventHandler<DoWorkCompletedEventArgs>(client_DoWorkCompleted);
client.DoWorkAsync();
传统 WebService:
BasicHttpBinding basicBinding = new BasicHttpBinding();
CustomBinding binding = new CustomBinding(basicBinding);
BindingElement binaryElement = new BinaryMessageEncodingBindingElement();
EndpointAddress endPoint = new EndpointAddress("http://172.168.1.100/DynamicInvokeWCF.Web/Asmx.asmx");
AsmxSoapClient client = (AsmxSoapClient)Activator.CreateInstance(typeof(AsmxSoapClient), binding, endPoint);
client.HelloWorldCompleted += new EventHandler<HelloWorldCompletedEventArgs>(client_HelloWorldCompleted);
client.HelloWorldAsync();
SilverLight动态调用WebService的方法
在我们添加Service Reference的时候,可能不知道该服务最终会被部署到什么位置,或者该服务可能被迁移,此时我们可以使用以下手段进行Service的调用,提高代码编写的灵活性。
步骤1:修改宿主Web页面的代码,将服务地址以初始化参数方式传入.
< form id ="form1" runat ="server" style ="height:100%" >< div id ="silverlightControlHost" >
< object data ="data:application/x-silverlight-2," type ="application/x-silverlight-2" width ="100%" height ="100%" >
...
< param name ="InitParams" value ="serviceAddress=http://localhost/services/myservices.asmx" />
< a href ="http://go.microsoft.com/fwlink/?LinkID=149156&v=3.0.40624.0" style ="text-decoration:none" >
< img src ="http://go.microsoft.com/fwlink/?LinkId=108181" alt ="Get Microsoft Silverlight" style ="border-style:none" />
</ a >
</ object >< iframe id ="_sl_historyFrame" style ="visibility:hidden;height:0px;width:0px;border:0px" ></ iframe ></ div >
</ form >
步骤2:添加Service引用并注册调用远程方法的事件处理
添加Service的引用不必赘述.但此处添加Service Reference的目的仅在于获得远程方法的命名空间等程序结构信息。
如果我们的Silverlight程序主页面名叫MainPage,则在MainPage.xaml.cs中添加如下代码:
public void InitializeServices( string serviceAddress){
BasicHttpBinding basicBinding = new BasicHttpBinding();
CustomBinding binding = new CustomBinding(basicBinding);
BindingElement binaryElement = new BinaryMessageEncodingBindingElement();
EndpointAddress endPoint = new EndpointAddress(serviceAddress);
MyService.MyServicesSoapClient serviceClient = (MyServicesSoapClient)Activator.CreateInstance( typeof (MyServicesSoapClient), binding, endPoint);
serviceClient.MyRemoteMethodCompleted += new EventHandler < MyService.MyRemoteMethodCompletedEventArgs > (serviceClient_MyRemoteMethodCompleted);
serviceClient.MyRemoteMethodAsync(); // 调用远程方法
}
步骤3:修改App.xaml.cs,添加Application.Startup事件处理方法Application_Startup
private void Application_Startup(object sender, StartupEventArgs e)
{
this.RootVisual = new MainPage();
string serviceAddress = e.InitParams["serviceAddress"].ToString();
(this.RootVisual as MainPage).InitializeServices(serviceAddress);
}
OK,至此,我们已经实现了在程序启动时调用一个MyRemoteMethod方法。以上代码稍加改动,我们就可以在程序的任意位置以这种方式调用远程方法了。
此方法对WCF Service的调用也有效,手段类似,实现略有不同。