序列化Web Api放置请求MVC 5的表单数据

Question

我有一个强类型的Razor视图，它显示一个类的记录。这个视图显示了一个表单，用户可以用它来更新记录(一个下拉框、几个复选框和几个文本框)。当用户通过更改控件的值来修改字段时，将立即向Web API发送ajax调用以更新该字段。下面的Ajax调用可以正常工作:

$(document).ready(function () {
    $(this).on("change", function (e) {
        var editRecordURL = $("#editRecordURL").val();
        var key = $("#AccessVM_Id").val();
        var mode = $("#AccessVM_AccessMode").val();
        var failLim = $("#AccessVM_LoginFailLimit").val();
        var cap = $("#AccessVM_PwdWCap").is(':checked');
        ...
        var rec = {
            Id: key,
            AccessMode: mode,
            LoginFailLimit: failLim,
            PwdWCap: cap,
            ....
        };
        $.ajax({
            type: "PUT",
            url: editRecordURL,
            data: JSON.stringify(rec),
            contentType: 'application/json; charset=utf-8',
            success: function (msg) {
                bootbox.alert("Success: Record updated successfully!");
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) {
                bootbox.alert("Error: " + errorThrown);
            }
        });
    });
});

然而，我想使这个函数更通用，所以它可以被重用为其他形式(特别是那些有更多的数据更新)。理想情况下，rec对象应该像这样填充:

var rec = $("#form").serializeArray();

不幸的是，这不起作用，因为在rec上应用JSON.stringify()后，它不会返回预期的JSON字符串。相反，它发送一系列像这样的名称/值对:

[{"name":"__RequestVerificationToken","value":"qVedWHJ6HIrqtLJpTxp4m5D2ehZ_AdjCOvQtz4Jyzlg0cdocsWqcTCiE2jzIEB7UsJPwuSZeZF7y1GsluHNrNCDV1wrHjU1UJO5vMMGTLB41"},{"name":"AccessVM.Id","value":"1"},{"name":"AccessVM.AccessMode","value":"1"},{"name":"AccessVM.LoginFailLimit","value":"10"},{"name":"AccessVM.PwdWCap","value":"true"},{"name":"AccessVM.PwdWCap","value":"false"},{"name":"AccessVM.PwdWNum","value":"true"},{"name":"AccessVM.PwdWNum","value":"false"},{"name":"AccessVM.PwdWSC","value":"true"},{"name":"AccessVM.PwdWSC","value":"false"},{"name":"AccessVM.PwdMinLen","value":"6"},{"name":"AccessVM.PwdMaxLen","value":"25"},{"name":"AccessVM.PwdChange","value":"90"},{"name":"AccessVM.PwdPrevUsedLimit","value":"10"}]

那么我如何修复这个，使字符串看起来像:

[{"AccessVM.Id": 1, "AccessVM.AccessMode": 1, "AccessVM.LoginFailLimit": 10, "AccessVM.PwdWCap": true, "AccessVM.PwdWNum": true, "AccessVM.PwdWSC": false, "AccessVM.PwdMinLen": 6, "AccessVM.PwdMaxLen": 25, "AccessVM.PwdChange": 90, "AccessVM.PwdPrevUsedLimit": 10}]

Web API Controller:

public class PoliciesController : ApiController
{
    ....
    // PUT: api/policies/1
    [ResponseType(typeof(void))]
    public IHttpActionResult PutPolicy(int id, AccessItemViewModel polDto)
    {
        ....
    }
    ....
}

视图模型

public class PolicyViewModel
{
    public AccessItemViewModel AccessVM { get; set; }
    ....
}
public class AccessItemViewModel
{
    public int Id { get; set; }
    public int AccessMode { get; set; }  
    public int LoginFailLimit { get; set; } 
    public bool PwdWCap { get; set; }   
    ....
}

Razor视图:

@model App.Web.ViewModels.PolicyViewModel
....
@using (Html.BeginForm("Register", "Account", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary("", new { @class = "text-danger" })
    <input type="hidden" id="editRecordURL" value="@Model.ExtraVM.EditRecordUrl" />
    @Html.LabelFor(m => m.AccessVM.AccessMode, new { @class = "col-xs-5" })
    @Html.HiddenFor(m => m.AccessVM.Id)
    @Html.DropDownListFor(m => m.AccessVM.AccessMode, new SelectList(Model.AccessModes, "Mode", "Description"), null, new { @class = "input-sm col-xs-7" })
    @Html.LabelFor(m => m.AccessVM.LoginFailLimit, new { @class = "col-xs-9" })
    @Html.DropDownListFor(m => m.AccessVM.LoginFailLimit, new SelectList(Model.LoginLimits, "LoginFailLimit", "Value"), null, new { @class = "input-sm col-xs-3" })
    @Html.LabelFor(m => m.AccessVM.PwdWCap, new { @class = "col-xs-11" })
    @Html.CheckBoxFor(m => m.AccessVM.PwdWCap, new { @class = "input-xs col-xs-1" })
    ....
}

Answer 1

您需要使用.serialize()(而不是.serializeArray()，它不能与您的bool属性和DefaultModelBinder正确工作)并删除contentType选项，因此它使用默认的application/x-www-form-urlencoded; charset=UTF-8，不要将数据字符串化。你的脚本应该是

$.ajax({
    type: "PUT",
    url: editRecordURL,
    data: $('form').serialize(),
    success: function (msg) {

但是，视图中的模型是PolicyViewModel，并且基于该模型生成表单控件，因此.serialize()函数将为PolicyViewModel序列化名称/值对。这意味着PutPolicy方法中的模型必须匹配。方法必须是

public IHttpActionResult PutPolicy(int id, PolicyViewModel model) // not AccessItemViewModel

---

如果方法参数不能改变，那么你的视图需要基于AccessItemViewModel，或者你需要使用AccessVM属性的部分视图，这样你就可以生成没有"AccessVM"前缀的name属性。例如

_AccessVM.cshtml

@model AccessItemViewModel
@Html.HiddenFor(m => m.Id)
....

和在主视图中，使用@Html.Action()或@Html.Partial()生成它的html