vb.net – 从特定IP地址发送SOAP请求

首先,阅读Ways to Customize your ASMX Client Proxy以了解覆盖代理类的GetWebRequest对象的基本技术.

您将需要覆盖GetWebRequest,以便您可以获取用于发出请求的ServicePoint.您将把BindIPEndPoint属性设置为指向您的方法的委托,该委托将返回正确的IP地址.

public partial class Service1
{
    protected override WebRequest GetWebRequest(Uri uri)
    {
        HttpWebRequest request = (HttpWebRequest) base.GetWebRequest(uri);
        request.ServicePoint.BindIPEndPointDelegate = ReturnSpecificIPAddress;
        return request;
    }

    private IPEndPoint BindIPEndPoint(
        ServicePoint servicePoint,IPEndPoint remoteEndPoint,int retryCount)
    {
        return new IPEndPoint(IPAddress.Parse("10.0.0.1"),80);
    }
}