Ajax调用中断了对子对象的绑定 [英] Ajax call breaks binding to object children

问题描述

没有ajax调用，我的主视图绑定到我的父类，主视图上的部分视图绑定到父类的子成员

Without the ajax call, My main view binds to my parent class and the partial view on main view, binds to a child member of the parent class

父母...

public class Client
{
    [ScaffoldColumn(false)]
    public int Id { get; set; }

    [DisplayName("Name")]
    [Required]
    [StringLength(120)]
    public string Name { get; set; }

    // etc...

    public virtual Address Address { get; set; }
}

父母的孩子...

public class Address
{
    [ScaffoldColumn(false)]
    public int AddressId { get; set; }

    [DisplayName("Address")]
    [Required]
    [StringLength(200)]
    public string Street { get; set; }

    // etc...

    [ForeignKey("Client")]
    public int? Id { get; set; }
    public virtual Client Client { get; set; }

}

主视图

@using (Html.BeginForm("Create", "Client", FormMethod.Post, new Dictionary<string, object> { { "data-htci-target", "addressData" } }))
{
    @Html.AntiForgeryToken()


    <div class="row">
        @Html.LabelFor(model => model.Name, new { @class = "control-label col-md-2" })
        <div class="col-sm-4 col-md-4 col-lg-4">
            @Html.Kendo().AutoCompleteFor(model => model.Name).HtmlAttributes(new { style = "width:100%" })
            @Html.ValidationMessageFor(model => model.Name)
        </div>
    </div>

    @{ var vdd = new ViewDataDictionary(ViewData) { TemplateInfo = new TemplateInfo() { HtmlFieldPrefix = "Address" } };}

    @Html.Partial("_AddressPartial", Model.Address, @vdd)

//yada yada ...你可以想象其余的非常标准的视图

// yada yada...you can imagine the rest of the very standard view

局部视图的模型是地址，并且全部连接起来. 当我发回到服务器时，Address成员已从部分视图中正确填充了输入的数据...

The partial view's model is Address and all hooks up. When I post back to the server the Address member is properly filled with entered data from the partial view...

所以现在...在我的局部视图中，我现在加载js来调用异步例程以为用户加载IP GEO数据-这样就可以预先填充城市，省份，国家/地区

So now...in my partial view, I now load the js to call the async routine to load the IP GEO data for the user - so it pre-fills the city, province, country

任何一个ajax调用示例都足够了……我调用了一个AddressControl，返回一个partialview结果，并用更新后的partialview替换了一个名为addressData的div:

Any example of an ajax call will suffice...mine calls an AddressControl, returns a partialview result and replaces a div named addressData with the updated partialview :

$(function() {

var urlGeoIeoip = "http://ip-api.com/json/?callback=?";

$.ajax({
    url: urlGeoIeoip,
    type: "GET",
    dataType: "json",
    timeout: 5000,
    success: function (geoipdata) {


        $.ajax({
            url: "/getlocationdata/" + geoipdata.country + "/" + geoipdata.regionName + "/" + geoipdata.city,
            type: "GET",
            timeout: 5000,
            success: function (data) {
                //alert(data);
                //var $form = $(this);
               // var $target = $($form.attr("data-htci-target"));
                var $newHtml = $(data);
                //alert($target);
                $("#addressData").replaceWith($newHtml);
                $("#City").data("kendoComboBox").value(geoipdata.city);
                $("#State").data("kendoComboBox").value(geoipdata.regionName);
                $("#Country").data("kendoComboBox").value(geoipdata.country);
            }
        });


    }
}).fail(function(xhr, status) {
    if (status === "timeout") {
         // log timeout here
    }
});
});

一切正常！

但是

现在，当我通过提交"按钮回发给用户时，父类的地址"子成员为空....

Now, when I post back to the user via the submit button, the Address child member of the parent class is null....

返回ajax调用后，如何重新绑定父类的Address成员?

How do I get it to rebind the Address member of the parent class after return of the ajax call?

推荐答案

通过在局部视图中生成输入字段，HTML帮助程序没有意识到Address模型是初始Client模型的属性，因此它在生成HTML输入像:

By generating your input fields in the partial view, the HTML helpers are unaware that your Address model is a property of your initial Client model, so it's generating HTML inputs like:

<input type="text" id="City" name="City" />
<input type="text" id="State" name="State" />

如果您的POST操作方法正在接受客户端模型，则模型绑定器将查找不存在的客户端模型属性城市"和州".

If your POST action method is accepting a Client model then the model binder will look for the properties City and State of the Client model, which don't exist.

您需要HTML输入如下所示:

You need your HTML input to look like:

<input type="text" id="Address_City" name="Address.City" />
<input type="text" id="Address_State" name="Address.State" />

您应该使用编辑器模板，它将在这种情况下根据需要保留父属性.

Instead of using a partial for your Address fields, you should use an Editor Template which will then preserve the parent property as you need in this case.

@Html.EditorFor(x => x.Address)

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