如何在ASP.NET MVC中显示具有相同ID的所有行？

Question

My Index page displays all rows from an Azure SQL Database. When I click a row I get redirected to a unique URL with a QR code for that URL and it also displays the data for only that row. Each row has it's own unique ID, but also a truckID. The truckID is for a driver who can "own" several rows of data, so I want to show every row with the same truckID after a row is clicked.

This is what I've got so far:

MODEL

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

            [Table("data")]
            public partial class data
            {
                [Required]
                [StringLength(50)]
                public string Contract { get; set; }

                [StringLength(50)]
                public string Sort { get; set; }

                public int? Report { get; set; }

                public double? InputKG { get; set; }

                public double? OutputKG { get; set; }

                public double? Recovery { get; set; }

                public double? Si { get; set; }

                public double? Cu { get; set; }

                public double? Mn { get; set; }

                public double? Mg { get; set; }

                public double? Zn { get; set; }

                public double? Cr { get; set; }

                public double? Fe { get; set; }

                public double? Pb { get; set; }

                public int? truckID { get; set; }

                [Key]
                public int ID{ get; set; }

            }
        }

VIEW (after a row is clicked from Index)

        @model QR.data

        @{
            ViewBag.Title = "Details";
            Layout = "~/Views/Shared/_Layout.cshtml";
        }

        <h2>QR code</h2>
            <img src="/Home/BarcodeImage?barcodeText=@Request.Url.OriginalString"/>

        <table class="table">
            <tr>
                <th>
                    @Html.DisplayNameFor(model => model.Contract)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Sort)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Report)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.InputKG)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.OutputKG)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Recovery)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Si)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Cu)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Mn)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Mg)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Zn)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Cr)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Fe)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Pb)
                </th>
            </tr>

            <tr>
                <td>
                    @Html.DisplayFor(model => model.Contract)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Sort)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Report)
                </td>
                <td>
                    @Html.DisplayFor(model => model.InputKG)
                </td>
                <td>
                    @Html.DisplayFor(model => model.OutputKG)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Recovery)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Si)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Cu)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Mn)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Mg)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Zn)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Cr)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Fe)
                </td>
                <td>
                    @Html.DisplayFor(model => model.Pb)
                </td>
            </tr>
        </table>
        <p>
            @Html.ActionLink("Back to List", "Index")
        </p>

CONTROLLER

  public ActionResult Details(int? id)
       {
           if (id == null)
           {
               return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
           }
           data data= db.data.Find(id);
           if (data == null)
           {
               return HttpNotFound();
           }
           return View(data);
       }

And on the Index I have this link:

        @Html.ActionLink("QR", "Details", new { id = item.ID})

Help?

Answer 1

With this answer I presume two things:

• db is a DbContext and has a property called data which is a DbSet<data>
• You don't have any other models for your data, only the data class

If the above is true, here's what you should do:

In the controller:

public ActionResult Details(int? id)
{
    if (id == null)
    {
        return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
    }

    data data = db.data.Find(id);
    if (data == null)
    {
        return HttpNotFound();
    }
    var groupedData = db.data.Where(d => d.truckID == data.truckID).ToList();

    return View(groupedData);
}

In your view (Details)

// This is after declaring the table headers
@foreach (var item in Model)
{
    <tr>
        <td>
                @Html.DisplayFor(model => item.Contract)
        </td>

        // Fill in rest of the td rows as you did 

        <td>
            @Html.DisplayFor(model => item.Pb)
        </td>
    </tr>
}

This should display all of the rows correctly.

Also, this is just for readability, but it is really important, capitalize your class names , ie it should be public partial class Data not data .

Answer 2

You didn't get any error on this statement ?

data data= db.data.Find(id);

I think it has to be like this

data data= db.data.Find(i=>i.ID == id);

and I supposed you were using foreach loop to print all of the data and in that loop you have that @Html.ActionLink.