Question

将模型从视图传递到controller-action时，返回的所有属性都是0。请参阅附图。 Returned model

OrderController.cs中定义的动作

[HttpPost]
public ActionResult Update(Order_Detail m)
{
    return View();
    //OrderUpdateViewModel model = new OrderUpdateViewModel();
    //model.hasError = true;
    //model.Title = m.OrderDetail.Title + " Edit Status";
}

查看文件Edit.cshtml：

@model ADO_Fan.Models.OrderDetailViewModel
@using (Html.BeginForm("Update", "Order", FormMethod.Post))
{
    <div>
    @Html.LabelFor(m => m.OrderDetail.OrderID) @Html.DisplayFor(m => m.OrderDetail.OrderID)<br />
    @Html.LabelFor(m => m.OrderDetail.Product.ProductName)  @Html.DisplayFor(m => m.OrderDetail.Product.ProductName)<br />
    @Html.LabelFor(m => m.OrderDetail.UnitPrice) @Html.DisplayFor(m => m.OrderDetail.UnitPrice)<br />
    @Html.LabelFor(m => m.OrderDetail.Quantity) @Html.TextBoxFor(m => m.OrderDetail.Quantity)<br />
    @Html.LabelFor(m => m.OrderDetail.Discount) @Html.DisplayFor(m => m.OrderDetail.Discount)<br />
    <input type="submit" value="Update" />
    </div>
}

在OrderDetailViewModel.cs中查看模型

using NorthwindDAL;
namespace ADO_Fan.Models
{
    public class OrderDetailViewModel
    {
        public Order_Detail OrderDetail { get; set; }
    }
}

在参考类

中定义的Order_Detail

namespace NorthwindDAL
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;
    using System.Data.Entity.Spatial;

    [Table("Order Details")]
    public partial class Order_Detail
    {
        [Key]
        [Column(Order = 0)]
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int OrderID { get; set; }

        [Key]
        [Column(Order = 1)]
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int ProductID { get; set; }

        [Column(TypeName = "money")]
        public decimal UnitPrice { get; set; }

        public short Quantity { get; set; }
        public float Discount { get; set; }
        public virtual Order Order { get; set; }
        public virtual Product Product { get; set; }
    }
}

感谢任何建议/建议！

Answer 1

你必须理解LabelFor和DisplayFor只做一次旅行意味着他们只会显示数据而不会在提交时返回数据，这样你就可以 TextBoxFor用于返回数据，或者您可以使用HiddenFor之类的

@model ADO_Fan.Models.OrderDetailViewModel
@using (Html.BeginForm("Update", "Order", FormMethod.Post))
{ 
   @Html.HiddenFor(m => m.OrderDetail.OrderID);
   @Html.HiddenFor(m => m.OrderDetail.Product.ProductName);
   @Html.HiddenFor(m => m.OrderDetail.UnitPrice);
   @Html.HiddenFor(m => m.OrderDetail.Quantity);
   @Html.HiddenFor(m => m.OrderDetail.Discount);

    <div>
    @Html.LabelFor(m => m.OrderDetail.OrderID) @Html.DisplayFor(m => m.OrderDetail.OrderID)<br />
    @Html.LabelFor(m => m.OrderDetail.Product.ProductName)  @Html.DisplayFor(m => m.OrderDetail.Product.ProductName)<br />
    @Html.LabelFor(m => m.OrderDetail.UnitPrice) @Html.DisplayFor(m => m.OrderDetail.UnitPrice)<br />
    @Html.LabelFor(m => m.OrderDetail.Quantity) @Html.TextBoxFor(m => m.OrderDetail.Quantity)<br />
    @Html.LabelFor(m => m.OrderDetail.Discount) @Html.DisplayFor(m => m.OrderDetail.Discount)<br />
    <input type="submit" value="Update" />
    </div>
}

或者您可以将@Html.LabelFor更改为@Html.TextBoxFor

MVC模型为所有属性返回0

1 个答案: