Question

我正在使用MVC .NET 4.5，我的表单返回null而不是List对象。同时我有这个Jquery函数，它将HTML添加到表单中，但它不只是添加HTML，它使表单POST到控制器。我不知道这两者是否相关，但以防我提供所有相关代码。请帮忙。

模特课：

public class BidModels
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id{ set; get;}


    //Who put the bid...
    public string UserId { set; get; }

    //The Compnay putting the bid
    [ForeignKey("CompanyModels")]
    public int? CompanyId { set; get; }

    public virtual CompanyModels CompanyModels { set; get; }

    //The position being bid on
    [ForeignKey("ProjectPositionModels")]
    public int? PositionId { set; get; }

    public virtual ProjectPositionModels ProjectPositionModels { set; get; }

    //How much?
    [DataType(DataType.Currency)]
    public int? BidAmount { set; get; }
}

控制器：

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> AddBid(IList<BidModels> bids)
{ 
    //Iterate the list for every new bid in it.
    var userId = User.Identity.GetUserId();
    var companyId = db.CompanyModels.Single(x => x.UserId == userId);


    //checking for content
    Console.Write(bids.ToString());
        //db.BidModels.Add();
       // await db.SaveChangesAsync();

    return View("Index");
}

局部视图：

    <form method="post" action="/BidModels/AddBid">

    <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
        <h4 class="modal-title">Make a Bid</h4>
    </div>
    <div class="modal-body">
        <div class="row">

            <div style="margin-left:15px;">
                <button id="add"><span class="glyphicon glyphicon-plus"></span></button>
                <button id="remove"><span class="glyphicon glyphicon-minus"></span></button>
            </div>


            @Html.AntiForgeryToken()

            <table class="table" id="form-table">
                <tr>
                    <th>
                        <strong>Position</strong>
                    </th>
                    <th>
                        <strong>Bid Amount</strong>
                    </th>
                </tr>
                <tr class="form-row">
                    <td>
                        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
                        <input type="hidden" name="bid[0].Id" value="" />

                        <input type="hidden" name="bid[0].UserId" value="" />

                        <input type="hidden" name="bid[0].CompanyId" value="" />

                        @Html.DropDownList("bid[0].PositionId", (IEnumerable<SelectListItem>)ViewBag.SelectList, htmlAttributes: new { @class = "form-control dlist" })

                    </td>
                    <td>
                        <div class="input-group">
                            <span class="input-group-addon">$</span>
                            <input type="text" class="form-control" name="bid[0].BidAmount" />
                            <span class="input-group-addon ">.00</span>
                        </div>
                    </td>
                </tr>
            </table>


        </div>
    </div>
    <div class="modal-footer">
        <button type="button" data-dismiss="modal" class="btn btn-default">Close</button>
        <button type="submit" class="btn btn-primary">Submit</button>
    </div>

</form>

Jquery的：

$(document).ready(function () {

        $i = 0;
        var bid = $("#form-table");

        var dlist = $(".dlist").clone().attr("name", "bid[" + $i + "].PositionId");

        $("#add").click(function () {

            $i++;
            var id = '<input type="hidden" name="bid[' + $i + '].Id"/>';
            var userId = '<input type="hidden" name="bid[' + $i + '].UserId"/>';
            var companyId = '<input type="hidden"  name="bid[' + $i + '].CompanyId"/>';
            var bidAmount = '<div class="input-group"><span class="input-group-addon">$</span><input type="text" class="form-control" name="bid[' + $i + '].BidAmount"/></div>';

            bid.append("<tr><td id='mvc" + $i +"'>" + id + userId + companyId + "</td><td> " + bidAmount + " </td></tr>");
            $("#mvc" + $i + "").append(dlist.clone());
    });

    $("#remove").click(function () {
        if ($("#form-table tr").length > 2) {
            $i--;
            $("#form-table tr:last").remove();
        } else {
            return;
        }
    });
});

Answer 1

您使用的名称为bid，但您的控制器正在使用bids。尝试为操作bid创建参数名称（反之亦然）并再次运行。

MVC返回null而不是IList＆lt;＆gt;宾语

1 个答案: