Question

视图出现一秒钟，然后抛出以下错误 -

参数字典包含参数＆＃39; sortField＆＃39;的空条目。非可空类型＆＃39; Project.Enumerators.SortResultEnum＆＃39;方法＆＃39; System.Threading.Tasks.Task 1[System.Web.Mvc.ActionResult] Details(Project.Enumerators.SortResultEnum, System.Web.Helpers.SortDirection, System.String, System.Nullable 1 [System.Int32]）＆＃39;在＆＃39; Project.Controllers.SearchController＆＃39;。可选参数必须是引用类型，可空类型，或者声明为可选参数。参数名称：参数

我有一个正在进行ajax调用的表单，后来ajax调用将它转发给控制器。

Ajax电话：

$(document).on('submit', '#SearchForm', function () {
var $form = $(this);
var $searchString = $("#SearchString").val();
var $sortField = $form.attr("data-sortOrder");
var $sortDirection = $form.attr("data-sortDirection");

SortResults($sortField, $sortDirection, $searchString);
});

形式：

 <form id="SearchForm" action="@Url.Action("Details", "Search")" method="get" data-ajax="true" data-sortOrder="@SortResultEnum.ClientName" data-sortDirection="@SortDirection.Ascending">

   @Html.TextBox("SearchString", ViewBag.CurrentSearchString as string, new { id = "SearchString", @class = "form-control", placeholder = "" })
  <span class="input-group-btn">
       <button class="btn btn-primary" type="submit" id="search-btn"><i class="glyphicon glyphicon-search"></i></button>
   </span>

        </form>

Controller Action就像

public async Task<ActionResult> Details(SortResultEnum sortField,SortDirection sortDirection, string searchString,  int? page)
 {
     //code to call service and get result is here
    // partial view is being used to display data

}

有人可以帮我解决这个错误。感谢。

Answer 1

我认为你在data-sortOrder中错过了“”。试试这个。

  data-sortOrder="@SortResultEnum.ClientName"

使用枚举显示数据时出错

1 个答案: