c# - ASP.NET MVC : Member with the same signature already exists error

Question

我有两个同名的 Controller 。一个带有 [get]，另一个带有 [post]。这两个执行完全不同的功能。为什么它们不能同名？

        [AcceptVerbs(HttpVerbs.Get)]
        public ActionResult AddCriteriaItem(CriteriaItemAddFormCollection ciafc)
        {
            return View(ciafc);
        }

        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult AddCriteriaItem(CriteriaItemAddFormCollection ciafc)
        {
            string GroupName = (string)Session["SelectedGroupName"];

            //add group or tab
            switch (ciafc.CriteriaID)
            {
                case (int)enums.Criterias.Tab:
                    Template.AddTab(ciafc.TemplateID, ciafc.name, ciafc.description);
                    Response.Redirect(Server.UrlDecode(ciafc.rtn));
                    break;
                case (int)enums.Criterias.Group:
                    Template.AddGroup(ciafc.TemplateID, ciafc.name, ciafc.description, ciafc.TabName);
                    ViewData["CategoryID"] = ciafc.CategoryID;
                    Response.Redirect(Server.UrlDecode(ciafc.rtn));
                    break;
                default:
                    if (!string.IsNullOrEmpty(GroupName.ToString()) && ciafc.CriteriaID > 0 && !string.IsNullOrEmpty(ciafc.TabName))
                    {
                        Template.AddCriteriaItem(ciafc.TabName, GroupName, ciafc.name, ciafc.description, ciafc.options, ciafc.CriteriaID, ciafc.TemplateID);
                    }
                    ViewData["rtn"] = Server.UrlDecode(ciafc.rtn);
                    ViewData["TemplateID"] = ciafc.TemplateID;
                    ViewData["CategoryID"] = ciafc.CategoryID;
                    break;
            }

            Response.Redirect(Server.UrlDecode(ciafc.rtn));
            return View();
        }

Answer 1

它们不能同名，因为正常的 C# 编译器规则重载具有完全相同的名称和签名。在第二次重载时使用 [ActionName] 属性:

[ActionName("AddCriteriaItem")]
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult SaveCriteriaItem(CriteriaItemAddFormCollection ciafc)