分三步走

1.保证你的webgrid包含在form中

@using (Html.BeginForm("Assign","Home")){ }

2.在webgrid中加一列checkbox

grid.Column(header: "Assign?",             format: @
     
      
     )

3.在controller中返回选中的对象的value属性，进一步处理

[HttpPost]        public ActionResult Assign(FormCollection form)        {            var ch = form.GetValues("assignChkBx");            foreach (var id in ch)            {              //...Get object using id              //...Call your method            }            return View();        }