SoapHttpClientProtocol/HttpWebClientProtocol连接状态

Question

我有一个基于SoapHttpClientProtocol的WebService引用（.NET CF 3.5）。我的问题是 - 有没有方法可以确定是否建立了与WebService的连接，而不是调用Web方法？我可以随时检查底层连接是否已建立并获得其状态？

Regards

Answer 1

您可以检查客户端的通信状态。

using (XServiceSoapClient client = new XServiceSoapClient()) 
{ 
    client.State; 
} 

public enum CommunicationState 
{ 
    // Summary: 
    //  Indicates that the communication object has been instantiated and is configurable, 
    //  but not yet open or ready for use. 
    Created = 0, 
    // 
    // Summary: 
    //  Indicates that the communication object is being transitioned from the System.ServiceModel.CommunicationState.Created 
    //  state to the System.ServiceModel.CommunicationState.Opened state. 
    Opening = 1, 
    // 
    // Summary: 
    //  Indicates that the communication object is now open and ready to be used. 
    Opened = 2, 
    // 
    // Summary: 
    //  Indicates that the communication object is transitioning to the System.ServiceModel.CommunicationState.Closed 
    //  state. 
    Closing = 3, 
    // 
    // Summary: 
    //  Indicates that the communication object has been closed and is no longer 
    //  usable. 
    Closed = 4, 
    // 
    // Summary: 
    //  Indicates that the communication object has encountered an error or fault 
    //  from which it cannot recover and from which it is no longer usable. 
    Faulted = 5, 
} 

Answer 2

我很确定没有连接，除非你在接口上调用方法。特别是因为通信是基于HTTP的。

在我正在开发的一个项目中，我实际上在客户端可以调用的服务器上创建了一个NOP方法。我用它来确定提供的连接信息和登录凭证是否有效（通过使用try-catch块）。