WCF-如何在每个Web请求上添加自定义SoapHeader？

我想将客户机地址头（客户机的IP地址）添加到来自客户机/用户的每个web请求的SOAP头中

我使用WCF服务，我的实现类如下：

public class Service : IService
{
    public Guid UserId()
    {
        if (MemUser != null)
            return (Guid)MemUser.ProviderUserKey;
        else
            return Guid.Empty;
    }
    public void SystemLog(Nullable<Guid> Customer, ResultCode Result, FacilityCode Facility, int Code, string Info)
    {
        // get IP address out of the SOAP header, if any
        string clientAddress = string.Empty;
        if ((ClientAddress != null) && !String.IsNullOrEmpty(ClientAddress.IPAddress))
            clientAddress = ClientAddress.IPAddress;
        else if ((HttpContext.Current != null) && (HttpContext.Current.Request != null) && !String.IsNullOrEmpty(HttpContext.Current.Request.UserHostAddress))
        clientAddress = HttpContext.Current.Request.UserHostAddress;

        SystemLog(Customer, Result, Facility, Code, Info, clientAddress); //writes into database
    }
//other methods
}

如果我有一个由SoapHeader继承的ClientAddressHeader类，比如

public class ClientAddressHeader : SoapHeader
{
    public string IPAddress;
    public ClientAddressHeader(){}
}

我可以使用[WebMethod]轻松地在wse中传递SOAP头（ClientAddress），如：

[WebService(Namespace = "http://www.example.com/webservice")]
public class Service : System.Web.Services.WebService
{
    public ClientAddressHeader ClientAddress;

    [WebMethod, SoapHeader("ClientAddress", Direction = SoapHeaderDirection.In)] //client request
    public Guid UserId()
    {
        if (MemUser != null)
            return (Guid)MemUser.ProviderUserKey;
        else
            return Guid.Empty;
    }
}

那么，当我使用WCF时，有人知道如何传递SoapHeader吗

如果有人向我解释清楚如何做到这一点，我真的很感激

PS：我也读过一些msdn中的博客，但没有一个对我真正有用，或者我不太了解这些内容。

检查可能的相关内容：

[WebService(Namespace = "http://www.example.com/webservice")]
public class Service : System.Web.Services.WebService
{
    public ClientAddressHeader ClientAddress;

    [WebMethod, SoapHeader("ClientAddress", Direction = SoapHeaderDirection.In)] //client request
    public Guid UserId()
    {
        if (MemUser != null)
            return (Guid)MemUser.ProviderUserKey;
        else
            return Guid.Empty;
    }
}