[英]Another null collection being passed to MVC Controller
我需要其他眼睛才能看到:
如何檢查以便僅保存要更改的行。
[HttpPost] public ActionResult Index(IList<EZone_ServiceGroup> sgList) { try { foreach (EZone_ServiceGroup sg in sgList) svcGroupRepo.UpdateServiceGroup(sg); return RedirectToAction("Index"); } catch { return View(); } }
視圖:
@model IEnumerable<KTCEzone.Domain.Entities.EZone_ServiceGroup>
@{
ViewBag.Title = "Index";
}
@using (Html.BeginForm())
{
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
<div class="row">
<table class="table table-condensed table-bordered table-hover table-striped small" id="sgTable">
<tr>
<th class="col-sm-12">@Html.DisplayNameFor(model => model.GroupID)</th>
<th>@Html.DisplayNameFor(model => model.GroupName)</th>
<th>@Html.DisplayNameFor(model => model.ParentGroupID)</th>
<th>@Html.DisplayNameFor(model => model.Active)</th>
<th>@Html.DisplayNameFor(model => model.OrderIndex)</th>
</tr>
@{var items = Model.ToArray();}
@for (int i = 0; i < items.Length; i++)
{
<tr>
<td>@Html.DisplayFor(modelItem => items[i].GroupID)</td>
<td>@Html.EditorFor(modelItem => items[i].GroupName) </td>
<td>@Html.EditorFor(modelItem => items[i].ParentGroupID) </td>
<td>@Html.CheckBoxFor(modelItem => items[i].Active) </td>
<td>@Html.EditorFor(modelItem => items[i].OrderIndex) </td>
</tr>
}
</table>
</div>
}
模型:
public class EZone_ServiceGroup
{
public int GroupID { get; set; }
public string GroupName { get; set; }
public bool Active { get; set; }
public int OrderIndex { get; set; }
public int ParentGroupID { get; set; }
}
將模型更改為@model IList<KTCEzone.Domain.Entities.EZone_ServiceGroup>
,然后從視圖中刪除@{var items = Model.ToArray();}
並使用
@for (int i = 0; i < Model.Count; i++)
{
<tr>
<td>@Html.DisplayFor(m => m[i].GroupID)</td>
<td>@Html.EditorFor(m=> m[i].GroupName)</td>
<td>@Html.EditorFor(m=> m[i].ParentGroupID)</td>
<td>@Html.CheckBoxFor(m=> m[i].Active) </td>
<td>@Html.EditorFor(m=> m[i].OrderIndex) </td>
</tr>
}
它將正確命名您的元素。 如果無法將集合更改為IList,則需要使用自定義EditorTemplate
作為模型的類型,並與@Html.EditorFor()
結合使用
至於“如何檢查以便只保存被更改的行” ,所有控件都將被回發,因此您需要將已發布的值與控制器中的原始值進行比較。
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