Question

我无法将DropDownListFor绑定到我的模型。 DisplayOrder返回null，VarietyFamilyID始终为0.我有一个未知数量的对象要编辑，所以我尝试使用EditorTemplate。

EditorTemplate视图

@model Wysocki_Variety_Management.Models.Image

<div>
   @Html.HiddenFor(i=>i.ImageStreamID)
   @Model.helperString
   @Html.DropDownListFor(i=>i.DisplayOrder, new SelectList(ViewBag.DisplayOptions, "Key", "Value"))
   @Html.DropDownListFor(i => i.VarietyFamilyID, new SelectList(ViewBag.Variety, "VarietyFamilyID", "Name"))
   @Ajax.ActionLink("Try Me",
                        "UpdateImage",
                        "Images",
                         new { s = Model.ImageStreamID, dislplayOrder = Model.DisplayOrder, familyID = Model.VarietyFamilyID },
                         new AjaxOptions {})
</div>

查看渲染模板

@model List<Wysocki_Variety_Management.Models.Image>

@using (Html.BeginForm("UpdateImage", "Images"))

{    
   <div>
      @Html.EditorForModel()
   </div>
}

控制器操作签名

 public ActionResult UpdateImage(Guid s, int displayOrder,int familyID)

修改

不确定投票或评论。当我使用EditorTemplate和@ Html.EditorForModel时，我为模型的每个成员获得了多个输入。

<form action="/Images/UpdateImage" method="post">   <div>
      <div>
   <input data-val="true" data-val-required="The Guid field is required." name="[0].ImageStreamID" type="hidden" value="e48aab34-0fe6-e511-8ebf-005056c00008" />

   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[0].DisplayOrder"><option value="312">Tuber</option>
<option value="313">Plant</option>
<option value="314">Marketing</option>
</select>
   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[0].VarietyFamilyID"><option value="0">Fianna</option>
<option value="0">Linzer Delikatesse</option>
<option value="3">Markies</option>
<option value="0">Provento</option>
<option value="5">Roko</option>
<option value="6">75-11-15 Sprint</option>
<option value="7">Alegria</option>

</select>
   <a data-ajax="true" href="/Images/UpdateImage?s=e48aab34-0fe6-e511-8ebf-005056c00008&amp;dislplayOrder=0&amp;familyID=0">Try Me</a>
</div><div>
   <input data-val="true" data-val-required="The Guid field is required." name="[1].ImageStreamID" type="hidden" value="e58aab34-0fe6-e511-8ebf-005056c00008" />

   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[1].DisplayOrder"><option value="312">Tuber</option>
<option value="313">Plant</option>
<option value="314">Marketing</option>
</select>
   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[1].VarietyFamilyID"><option value="0">Fianna</option>
<option value="0">Linzer Delikatesse</option>
<option value="3">Markies</option>
<option value="0">Provento</option>
<option value="5">Roko</option>
<option value="6">75-11-15 Sprint</option>
<option value="7">Alegria</option>

</select>
   <a data-ajax="true" href="/Images/UpdateImage?s=e58aab34-0fe6-e511-8ebf-005056c00008&amp;dislplayOrder=0&amp;familyID=0">Try Me</a>
</div><div>
   <input data-val="true" data-val-required="The Guid field is required." name="[2].ImageStreamID" type="hidden" value="e68aab34-0fe6-e511-8ebf-005056c00008" />

   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[2].DisplayOrder"><option value="312">Tuber</option>
<option value="313">Plant</option>
<option value="314">Marketing</option>
</select>
   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[2].VarietyFamilyID"><option value="0">Fianna</option>
<option value="0">Linzer Delikatesse</option>
<option value="3">Markies</option>
<option value="0">Provento</option>
<option value="5">Roko</option>
<option value="6">75-11-15 Sprint</option>
<option value="7">Alegria</option><option value="331">A02507-2LB</option>

</select>
   <a data-ajax="true" href="/Images/UpdateImage?s=e68aab34-0fe6-e511-8ebf-005056c00008&amp;dislplayOrder=0&amp;familyID=0">Try Me</a>
</div><div>
   <input data-val="true" data-val-required="The Guid field is required." name="[3].ImageStreamID" type="hidden" value="e78aab34-0fe6-e511-8ebf-005056c00008" />

   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[3].DisplayOrder"><option value="312">Tuber</option>
<option value="313">Plant</option>
<option value="314">Marketing</option>
</select>
   <select data-val="true" data-val-number="The field Int32 must be a number." data-val-required="The Int32 field is required." name="[3].VarietyFamilyID"><option value="0">Fianna</option>
<option value="0">Linzer Delikatesse</option>
<option value="3">Markies</option>
<option value="0">Provento</option>
<option value="5">Roko</option>
<option value="6">75-11-15 Sprint</option>
<option value="7">Alegria</option>

Answer 1

您视图中的模型为IEnumerable<Image>，因此要在提交表单时进行绑定，方法必须

[HttpPost]
public ActionResult UpdateImage(IEnumerable<Image> model)

和model将包含3个正确绑定的Image个对象。

表单根据成功表单控件的name和value属性发回名称/值对，DefaultModelBinder与您的参数和模型属性匹配。目前，您的方法中的参数为Guid s, int displayOrder, int familyID，并且值可以绑定到这些参数的唯一方法是，您的表单包含name="s"，name="displayOrder"和name="familyID"的控件。 / p>

请注意，在@Ajax.ActionLink()中使用EditorTemplate只会回发模型的初始值。如果要发布表单控件的值，则需要提交表单。

DropDownListFor在EditorTemplate中没有绑定

1 个答案: