如何使用带有ID的ActionLink访问具有不同控制器的Action方法的一个控制器ActionMethod

Question

我正在开发一个包含3个模型和3个控制器（RawMaterial，Supplier和PurchaseOrder）的应用程序。 这是我的课程。

public class RawMaterial
{
    public int RawMAterialID { get; set; }
    public string RawMaterialName { get; set; }
    public int Quantity { get; set; }

    public int SupplierID { get; set; }
    public virtual Supplier Supplier { get; set; }

    public int PurchaseOrderID { get; set; }
    public virtual PurchaseOrder PurchaseOrder { get; set; }
}

public class Supplier
{
    public int SupplierID { get; set; }
    public string SupplierName { get; set; }
    [DataType(DataType.MultilineText)]
    public string SupplierAddress { get; set; }


    public virtual List<RawMaterial> RawMaterials { get; set; }
}

public class PurchaseOrder
{
    public int PurchaseOrderID { get; set; }

    [DataType(DataType.Date)]
    public DateTime Date { get; set; }

    public virtual List<RawMaterial> RawMaterial { get; set; }
}

采购订单索引视图

<td>
        @Html.ActionLink("Add RawMaterials", "POMaterialsCreate", "RawMaterial", new { id = item.PurchaseOrderID }, null) |
        @Html.ActionLink("Edit", "Edit", new { id=item.PurchaseOrderID }) |
        @Html.ActionLink("Details", "Details", new { id=item.PurchaseOrderID }) |
        @Html.ActionLink("Delete", "Delete", new { id=item.PurchaseOrderID })
    </td>

RawMaterials控制器HTTPGET CreateMethod

public ActionResult POMaterialsCreate(int id)
    {
        var POrawMaterials = db.RawMaterials.SingleOrDefault(s => s.PurchaseOrderID == id);

        ViewBag.SupplierID = new SelectList(db.Suppliers, "SupplierID", "SupplierName");
        return View(POrawMaterials);
    }

RM HTTPPOST创建方法

[HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult POMaterialsCreate(RawMaterial rawMaterial)
    {
        if (ModelState.IsValid)
        {
            db.RawMaterials.Add(rawMaterial);
            db.SaveChanges();
            return RedirectToAction("POMaterials");
        }


        ViewBag.SupplierID = new SelectList(db.Suppliers, "SupplierID", "SupplierName", rawMaterial.SupplierID);
        return View(rawMaterial);

RouteConfig文件

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

我正在ddl.On PurchaseOrders上的rawMaterials表单上访问供应商列表。正在创建新的采购订单，然后将我重定向到PurchaseOrders“索引” ActionMethod，在这里可以查看所有PO的列表。现在在PO索引视图上页面中，我在列表中的每一行中添加了Link @Html.ActionLink("Add RawMaterials","Create","RawMaterial",{id = item.PurchaseOrderID},null) 。

当用户单击PurchaseOrder的“索引”页面上的此链接时，它应转到具有采购订单ID的RawMaterial控制器的HttpGet“ POMaterialsCreate” ActionMethod，另一方面，将其作为参数传递给HttpGet“ POMaterialsCreate”方法。

如何在RawMaterial HttpGet和HttpPost“ POMaterialsCreate”方法中处理此ID，以便可以针对单个PurchaseOrderID创建多个RawMaterials？ 以及如何在RM create View中显示此PO ID？

Answer 1

我的意思是您的链接应该是：@ Html.ActionLink（“添加RawMaterials”，“创建”，“ POMaterialsCreate”，{id = PurchaseOrderID}，空）

还可以浏览浏览器中的调试器控制台