获取登录的IP或者信息

这是转载的，也不想去检查性能，对于这些成熟的代码，发在这里完全是懒，仅此而已！

1、获取客户端IP 

/// <summary>
/// 获取客户端Ip
/// </summary>
/// <returns></returns>
public String GetClientIp()
{
    String clientIP = "";
    if (System.Web.HttpContext.Current != null)
    {
        clientIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
        if (string.IsNullOrEmpty(clientIP) || (clientIP.ToLower() == "unknown"))
        {
            clientIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];
            if (string.IsNullOrEmpty(clientIP))
            {
                clientIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }
        }
        else
        {
            clientIP = clientIP.Split(',')[0];
        }
    }
    return clientIP;
}

2、服务器端获取客户端请求IP和客户端机器名称

/// <summary>
/// 服务器端获取客户端请求IP和客户端机器名称
/// </summary>
public static void GetClientInfo()
{
    OperationContext context = OperationContext.Current;
    MessageProperties messageProperties = context.IncomingMessageProperties;
    RemoteEndpointMessageProperty endpointProperty = messageProperties[RemoteEndpointMessageProperty.Name] as RemoteEndpointMessageProperty;
    HttpRequestMessageProperty requestProperty = messageProperties[HttpRequestMessageProperty.Name] as HttpRequestMessageProperty;
    string clientIp = !string.IsNullOrEmpty(requestProperty.Headers["X-Real-IP"]) ? requestProperty.Headers["X-Real-IP"] : endpointProperty.Address;
    string clientName = Environment.MachineName;
    Console.WriteLine("ClientIp: " + clientIp + "clientName:" + clientName);
}