MVC4-提交期间的部分视图模型绑定 [英] MVC4 - Partial View Model binding during Submit

问题描述

我有一个视图模型，该模型具有另一个子模型来呈现部分视图(如下).

I have view model which has another child model to render the partial view (below).

public class ExamResultsFormViewModel
{
    public PreliminaryInformationViewModel PreliminaryInformation { get; set; }

    public string MemberID { get; set; }

    public string MemberName { get; set; }

    public int PatientID { get; set; }

    public string ConfirmationID { get; set; }

    public bool IsEditable { get; set; }

    #region Select Lists
    public SelectList ProviderOptions { get; set; }
    #endregion
}

public class PreliminaryInformationViewModel
{
    public string ProviderName { get; set; }

    public string ProviderID { get; set; }

    public string ServiceLocation { get; set; }
}

此PreliminaryInformationViewModel视图模型在另一个视图模型中也用作子模型，因为可以在不同页面上更新此初步信息.

This PreliminaryInformationViewModel view model also used as a child models in another view model since this preliminary information can be updated at different pages.

因此，我将这些初步信息作为单独的部分创建，并包含在其他页面中.

So I created this preliminary information as a separate partial and to include in other pages.

@{Html.RenderPartial("_PreliminaryInformation", Model.PreliminaryInformation);}

在部分内

@model Web.Models.Preliminary.PreliminaryInformationViewModel
<div>
    @Html.TextBoxFor(x => x.DateOfService })
</div>

但是问题是在提交过程中，由于HTML名称属性始终呈现为以下形式，因此该初步模型始终为null

But the problem is during submit this preliminary model is always null due to the reason HTML name attribute is always is rendered as

但是当我将父模型传递给部分模型时，如下所示.

but when I pass the parent model to the partial as below.

@model Web.Models.Exam.ExamResultsFormViewModel
<div>
    @Html.TextBoxFor(x => x.PreliminaryInformation.DateOfService })
</div>

现在HTML元素生成为

Now the HTML element is generated as

<input type = 'text' name='PreliminaryInformation.DateOfService.DateOfService' id='PreliminaryInformation.DateOfService'>

，并且在提交期间正确绑定.

and it binds properly during the submit.

我了解MVC基于name属性值绑定元素值，但是第二种实现需要我为每个页面创建一个多个部分，这是我不喜欢的.

I understand MVC bind the element value based on the name attribute value, but the second implementation would need me to create a multiple partial for each page, which I don't like.

到目前为止，我找不到适合第一个实现的解决方案，有没有办法在提交第一个实现的过程中使初步的信息模型值绑定.

So far I couldn't find a solution to work with the first implementation, is there way I can make preliminary information model value bind during submit with the first implementation.

推荐答案

我知道有点晚了，但它可能对某人有帮助

I know its a bit late but it might help to someone

如果您有复杂的模型，仍然可以使用以下方法将其传递给部分模型:

If you have complex model, you can still pass it into partial using:

@Html.Partial("_YourPartialName", Model.Contact, new ViewDataDictionary()
{
    TemplateInfo = new TemplateInfo()
    {
        HtmlFieldPrefix = "Contact"
    }
})

我在其中定义了具有联系人"属性的模型.现在，HtmlFieldPrefix要做的是为每个模型添加属性绑定，以便模型绑定器可以找到父模型"

where I have defined model with property "Contact". Now what HtmlFieldPrefix do is add the property binding for each model "so the model binder can find the parent model"

有一篇关于它的博客文章: http://www.cpodesign.com/blog/bind-partial-view-model-binding-during-submit/

There is a blog post about it: http://www.cpodesign.com/blog/bind-partial-view-model-binding-during-submit/

.NET Core 2绑定

在.NET Core 2和MVC中，以上答案将不起作用，该属性不再可设置.

In .NET Core 2 and MVC the answer above will not work, the property is no longer settable.

解决方案非常相似.

 @{ Html.ViewData.TemplateInfo.HtmlFieldPrefix = "Contact"; }
 @await Html.PartialAsync("_YourPartialName", Model.Contact)

提交模型后，它将再次绑定.

after you can submit your model, it will bind again.

希望有帮助

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