验证在ASP.NET MVC中动态创建领域 [英] Validating dynamically created fields in ASP.NET MVC

问题描述

我有一个ASP.NET MVC视图的格式如下：

I have the following form in an ASP.NET MVC view:

<%= Html.ValidationSummary() %>
<% var fields = ViewData.Model; %>
<% using (Html.BeginForm("Dynamic", "Candidate")) { %>
    <% foreach (var field in fields) { %>
       <label for="<%= field.FieldName %>"><%= field.FieldName %></label>
       <%= Html.TextBox(field.FieldName, field.Value, new { @class = "short" }) %>
    <% } %>    
    <a class="button green" onclick="$('form').submit(); return false;">Submit</a>
<% } %>

我有这种加载形式以及接受后一个控制器的动作，它看起来像这样：

I have a single controller action that loads this form as well as accepts the post, it looks like this:

public ActionResult Dynamic() {

    var fields = DataProvider.Candidates.GetAllDynamicFields();

    if (Request.HttpMethod == "POST") {
        fields.ForEach(f => f.Value = Request[f.FieldName]);
        var validation = DataProvider.Candidates.SaveDynamicFields(fields);
        if (validation.IsValid)
            return RedirectToAction("Index");
        ViewData.ModelState.AddErrorsFromValidationResult(validation);
    }

    return View(fields);
}

我的问题是，如果任何一个验证失败（即验证对象包含错误），那么我的观点渲染得到一个错误，因为ViewData.ModelState不包含任何键。我在哪里去错在这里？任何线索？

My problem is that if any of the validators fail (i.e. the validation object contains errors) then I get an error on view rendering because ViewData.ModelState doesn't contain any keys. Where am I going wrong here? Any clues?

推荐答案

想通了。 ViewData.ModelState是在响应对象的PARAMS填充。因此，与动态创建的形式，你不知道到底发生了什么在后通过。所以，我只是重新对飞我的ModelState：

Figured it out. ViewData.ModelState is populated by the params in the response object. So with a dynamically created form you don't know exactly what was passed in the post. So I just recreate my ModelState on the fly:

fields.ForEach(f => ViewData.ModelState.Add(f.FieldName ...

然后，我们都好......当被验证的观点可以发现在ModelState中，并没有异常的所有键运行......就像一个魅力。

And then we're all good...when the validation is run on the view it can find all the keys in the ModelState and no exceptions...works like a charm.

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