如何正确使用RedirectToAction

Question

我在mvc中使用RedirectToAction方法时遇到问题.我的地图路线看起来像这样.

             routes.MapRoute(
         "Project",  // Route name
         "{Controller}/{Action}/{projectId}/{machineName}/{companyId}",
          new { controller = "Project", action = "Directives", projectId = 0, machineName = "", companyId = 0 }  // Parameter defaults);

返回看起来像这样:

 return RedirectToAction("Directives", "Project", new { projectId = projectId, machineName = project.MachineName, CompanyId = user.Company_Id });

它工作正常,但我使用RedirectToAction它仍然看起来像这样

http://localhost:1843/Project/Directives?projectId=48&machineName=Netduino&companyId=27

控制器:

        [HttpPost]
    [ValidateInput(false)]
    public ActionResult Create(Project project, string text)
    {
        ViewBag.MachineType = new List<string>(new string[] { "Machine Type A", "Machine Type B", "Machine Type C", "Machine Type D", "Machine Type E" });

        if (ModelState.IsValid)
        {
            UserAccess user = (UserAccess)(Session["UserAccessInfo"]);

            Int64 projectId = DataBase.DBProject.InsertProject(project.ProjectNumber, project.MachineName, project.MachineNameEnglish, 1, project.Serial, text, user.Company_Id,project.MachineType);

            return RedirectToAction ("Directives", "Project", new { projectId = 48, machineName = "Netduino", companyId = 27 });
           // return RedirectToAction("Directives", "Project", new { projectId = projectId, machineName = project.MachineName, CompanyId = user.Company_Id });
        }
        else
        {
            ModelState.AddModelError("", "Invalid username or password");
        }

        return View();

    }

接收控制器:

public ActionResult Directives(int projectId, string machineName, int companyId)
    {
        convertedDirectives = new List<Models.Directives>();
        ViewBag.MachineName = machineName;
        ViewBag.ProjectId = projectId;
        List<object> Directives = new List<object>();

        if (ModelState.IsValid)
        {
            Directives = DataBase.DBProject.GetDirectives(companyId);
            foreach (List<object> dir in Directives)
            {
                Directives newDirective = new Models.Directives();
                newDirective.CompanyID = Convert.ToInt32(dir[0]);
                newDirective.DirectiveId = Convert.ToInt32(dir[1]);
                newDirective.Id = Convert.ToInt32(dir[2]);
                newDirective.DirectiveName = Convert.ToString(dir[3]);
                newDirective.DirectiveNameShort = Convert.ToString(dir[4]);
                newDirective.Created = Convert.ToDateTime(dir[5]);

                convertedDirectives.Add(newDirective);
            }
        }
        else
        {
            ModelState.AddModelError("", "An error has ");
        }

        ViewBag.DirectivesList = convertedDirectives;
        return View();
    }

但我想要的方式是这样的.

http://localhost:1843/Project/Directives/48/Netduino/27

但奇怪的是,我可以手动输入Url并且它可以完成.我做错了什么？

Answer 1

我有一些建议。

首先，不要命名你的路线。将 null 传递给第一个参数。有多个采用路由名称的 RedirectToRoute 重载，并且 RedirectToAction 返回 RedirectToRouteResult。

其次，不要为所需参数提供默认值。如果您想要默认值，请仅为最后一个参数指定默认值。

routes.MapRoute(null, // don't name the route
    "{controller}/{action}/{projectId}/{machineName}/{companyId}",
    new
    {
        controller = "Project", 
        action = "Directives", 
        //projectId = 0, 
        //machineName = "", 
        //companyId = 0,
    }
);

第三，如有疑问，请尝试返回 RedirectToRoute。传递控制器、操作和区域（如果适用）以及其他参数：

return RedirectToRoute(new
{
    controller = "Project",
    action = "Directives",
    // area = "SomeAreaName", // if the action is in an area
    projectId = projectId, 
    machineName = project.MachineName, 
    companyId = user.Company_Id,
});

最后一个技巧是使用 T4MVC 摆脱那些神奇的字符串。

routes.MapRoute(null, // don't name the route
    "{controller}/{action}/{projectId}/{machineName}/{companyId}",
    new
    {
        controller = MVC.Project.Name, 
        action = MVC.Project.ActionNames.Directives, 
    }
);

您可以在 RedirectToRoute 中使用相同的强类型，也可以使用 T4MVC 部分返回操作：

return RedirectToAction(MVC.Project.Directives
    (projectId, project.MachineName, user.Company_Id));