MVC 6 VNext如何设置HtmlFieldPrefix? [英] MVC 6 VNext how to set HtmlFieldPrefix?

问题描述

我的视图分为部分视图.因此，在提交时，我的模型未正确重建.

My view is divided into partial views. Hence, at the time of submission my model isn't reconstructed correctly.

页面视图显示员工数据，其中Employee.Contactinfo是_contactInfo局部视图的模型，该视图又具有_phoneInfo局部视图，以呈现模型为Employee.ContactInfo.PhoneInfo的电话信息.

The page view displays employee data, where Employee.Contactinfo is the model of _contactInfo partial view, which again has a partial view _phoneInfo to render phone info having model Employee.ContactInfo.PhoneInfo.

现在问题出在属性名称上.呈现时的Employee.ContactInfo.PhoneInfo.Contact1名称为"Contact1"，因此，在提交模型时未正确创建模型，我得到Employee的原始数据，但诸如ContactInfo之类的复杂类型为null.

Now the problem is with the name of properties. Employee.ContactInfo.PhoneInfo.Contact1 at the time of rendering has name "Contact1", hence at the time of submission the model isn't created appropriately, I get primitive data of Employee but complex type like ContactInfo is null.

我认为解决方案是在渲染局部视图时添加前缀.如何在MVC 6中执行以下操作?

I think the solution is to add the prefix at the time of rendering the partial view. How can I perform the following in MVC 6?

employee.cshtml

employee.cshtml

@model Employee
<% Html.RenderPartial("_conctactInfo", Model.ContactInfo, new ViewDataDictionary
{
    TemplateInfo = new System.Web.Mvc.TemplateInfo { HtmlFieldPrefix = "ContactInfo" }
})
%>

_contactInfo.cshtml

_contactInfo.cshtml

@model ContactInfo
<% Html.RenderPartial("_phoneInfo", Model.PhoneInfo, new ViewDataDictionary
{
    TemplateInfo = new System.Web.Mvc.TemplateInfo { HtmlFieldPrefix = "PhoneInfo" }
})
%>

_phoneInfo.cshtml

_phoneInfo.cshtml

@model PhoneInfo
<input asp-for="@Model.Contact1" />

推荐答案

这是解决方案，

namespace Website1.Extensions
{
    public static class HtmlHelper
    {
        public static IHtmlContent Partial(this IHtmlHelper htmlHelper, string partialViewName, object model, string prefix)
        {
            var viewData = new ViewDataDictionary(htmlHelper.ViewData);
            var htmlPrefix = viewData.TemplateInfo.HtmlFieldPrefix;
            viewData.TemplateInfo.HtmlFieldPrefix += !Equals(htmlPrefix, string.Empty) ? $".{prefix}" : prefix;
            return htmlHelper.Partial(partialViewName, model, viewData);
        }

        public static Task<IHtmlContent> PartialAsync(this IHtmlHelper htmlHelper, string partialViewName, object model, string prefix)
        {
            var viewData = new ViewDataDictionary(htmlHelper.ViewData);
            var htmlPrefix = viewData.TemplateInfo.HtmlFieldPrefix;
            viewData.TemplateInfo.HtmlFieldPrefix += !Equals(htmlPrefix, string.Empty) ? $".{prefix}" : prefix;
            return htmlHelper.PartialAsync(partialViewName, model, viewData);
        }
    }
}

employee.cshtml

employee.cshtml

@using Website1.Extensions;
@model Employee
@Html.Partial("_contactInfo", Model.ContactInfo, nameof(Model.ContactInfo))

_contactInfo.cshtml

_contactInfo.cshtml

@using Website1.Extensions;
@model ContactInfo
@Html.Partial("_phoneInfo", Model.PhoneInfo, nameof(Model.PhoneInfo))

_phoneInfo.cshtml

_phoneInfo.cshtml

@model PhoneInfo
<input asp-for="@Model.Contact1" />

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