.NET 客户IP地址捕捉

MVC模式下要获取客户IP可以在ActionFilterAttribute中进行拦截

 filterContext.HttpContext.Request.UserHostAddress

同样，在WebAPI中也可以用同样的方式获取，只是继承自System.Web.Http.Filters.ActionFilterAttribute

 private string GetClientIP(HttpActionContext actionContext)
         {
             if (actionContext.Request.Properties.ContainsKey("MS_HttpContext"))
             {
                 return ((HttpContextWrapper)actionContext.Request.Properties["MS_HttpContext"]).Request.UserHostAddress;
             }

             if (actionContext.Request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
             {
                 RemoteEndpointMessageProperty prop;
                 prop = (RemoteEndpointMessageProperty)actionContext.Request.Properties[RemoteEndpointMessageProperty.Name];
                 return prop.Address;
             }

             return null;
         }