SoapHttpClientProtocol/HttpWebClientProtocol连接状态

Question

我有一个基于SoapHttpClientProtocol的WebService参考(.NET CF 3.5)。我的问题是-除了调用web方法之外，有没有一种方法可以确定是否建立了到WebService的连接？我是否可以随时检查底层连接是否已建立并获取其状态？

问候

Answer 1

您可以在客户端上检查通信状态。

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

我非常确定，除非在接口上调用方法，否则不会建立任何连接。特别是因为通信是基于HTTP的。

在我正在做的一个项目中，我实际上在服务器上创建了一个客户端可以调用的NOP方法。我使用它来确定提供的连接信息和登录凭据是否有效(通过使用try-catch块)。