我在我的解决方案中有一个模型,在我的POST表单操作中没有填充。为什么这个模型不同呢?
这是无法绑定到我的Post操作的模型:
public class CompanyListingParameters
{
public String Category { get; set; }
public String CityState { get; set; }
}
这是从Chrome调试器中获取的实时表单:
<form class="panel form-horizontal" method="post" action="/company/search" novalidate="novalidate">
<div class="panel-heading">
<h2 class="panel-title">
<i class="panel-title-icon fa fa-search fa-3x"></i>
Find a Company
</h2>
</div>
<div class="panel-body padding-sm">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<label class="control-label sr-only" for="Category">Category</label>
<span role="status" aria-live="polite" class="ui-helper-hidden-accessible"></span>
<input type="text" id="Category" name="Category" value="Architecture" class="autocomplete required form-control form-group-margin ui-autocomplete-input" data-autocomplete-url="/api/servicecategory/search/" data-autocomplete-url-method="get" autocomplete="off">
</div>
</div>
<div class="row">
<div class="col-md-8 col-md-offset-2">
<label class="control-label sr-only" for="CityState">City, State</label>
<span role="status" aria-live="polite" class="ui-helper-hidden-accessible"></span>
<input type="text" id="CityState" name="CityState" value="" class="autocomplete required form-control form-group-margin ui-autocomplete-input ui-autocomplete-loading" data-autocomplete-url="/api/companyservicelisting/area/cities/search" data-autocomplete-url-method="get" data-autocomplete-itemtemplate="CityAutocomplete" data-autocomplete-itemvalue="FormattedAddress" autocomplete="off">
</div>
</div>
</div>
<div class="panel-footer text-center">
<input type="submit" value="Search" id="Search" name="Search" class="btn btn-primary btn-lg">
</div>
</form>
控制器代码如下:
[RoutePrefix("company/search")]
public partial class CompanySearchController : Controller
{
[Route("")]
public virtual ActionResult Search(String category, String cityState)
{
var model = ...; //This action works - search results view
return View(MVC.CompanySearch.Views.Search, model);
}
[HttpPost]
[Route("")]
public virtual ActionResult SearchPost(CompanyListingParameters search)
{ //parameter 'search' is null here
return string.IsNullOrWhiteSpace(search.CityState) || string.IsNullOrWhiteSpace(search.Category)
? RedirectToAction(MVC.Home.Index())
: RedirectToAction(MVC.CompanySearch.Search(search.Category.ToLower(), search.CityState.ToLower()));
}
}
如果我将无效的操作更改为以下内容,则它可以正常工作(类别和城市/州已绑定):
[HttpPost]
[Route("")]
public virtual ActionResult SearchPost(String Category, String CityState)
{ //parameters 'Category' and 'CityState' are populated on Post
return string.IsNullOrWhiteSpace(CityState) || string.IsNullOrWhiteSpace(Category)
? RedirectToAction(MVC.Home.Index())
: RedirectToAction(MVC.CompanySearch.Search(Category.ToLower(), CityState.ToLower()));
}
DefaultModelBinder
初始化了一个新的CompanyListingParameters
实例,然后从FormCollection
中分配Category
和CityState
的值,接着它读取另一个名为search
的值,该值匹配您的参数名称,因此它试图将CompanyListingParameters
设置为字符串“搜索”(按钮的值),但无法绑定,因此变成null
。请注意,您还可以通过将参数名称更改为任何名称(除了您返回的其中一个值的名称)来解决此问题。 - user3559349