.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;
        }