【发布时间】：2015-10-14 14:49:39
【问题描述】：
我正在使用 Editortemplates 显示与表单关联的项目列表，如果不需要，我允许用户删除行 但是，当用户在删除 POST 操作中的任何行后提交表单时，我将集合设为 null，如果用户没有删除任何项目，我将在 POST 操作中使用修改后的值获得完整的集合。 这是我尝试使用模型控制器和视图的代码
型号
public class Student
{
public string StudName { get; set; }
public int StudId { get; set; }
public List<Assignment> Assignments { get; set; }
}
public class Assignment
{
public int Id{get;set;}
public string Name{get;set;}
public int Amount{get;set;}
public string Remarks{get;set;}
}
控制器动作
public ActionResult Assign(int Id)
{
Student model = new Student { StudId = Id, StudName = "Name +" + Id };
List<Assignment> _assignments = new List<Assignment>();
for(int j=0;j<3;j++)
{
Assignment itm = new Assignment { Id = j, Name = "Assign " + j, Remarks = "Remarks " + j, Amount = j * 33 };
_assignments.Add(itm);
}
model.Assignments = _assignments;
return View(model);
}
[HttpPost]
public ActionResult Assign(int Id,Student model)
{
return Content("rxvd "+model.Assignments.Count);
//count is correct if not removing anything from Assign page
//If i remove any items from assign page then count is null
}
分配视图
@model OpenXMLMvc3.Controllers.Student
@{
ViewBag.Title = "Assign";
}
<h2>Assign</h2>
<script type="text/javascript">
$(function () {
//call from Editor template
$("a.deleteRow").live("click", function () {
$(this).parents("tr.editorRow:first").remove();
return false;
});
});
</script>
@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
<div class="col-md-6">
<div class="editor-label">
@Html.LabelFor(model => model.StudName)
@Html.EditorFor(model => model.StudName)
@Html.ValidationMessageFor(model => model.StudName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.StudId)
@Html.EditorFor(model => model.StudId)
@Html.ValidationMessageFor(model => model.StudId)
</div>
</div>
<div class="col-md-6">
<table id="container">
@for (int j = 0; j < Model.Assignments.Count; j++)
{
//using editor template to list the assignments
@Html.EditorFor(model => Model.Assignments[j])
}
@*This will [using foreach instead of for ] result a NULL at form submission even without editing or removing any rows
@foreach (OpenXMLMvc3.Controllers.Assignment assign in Model.Assignments)
{
@Html.EditorFor(model => assign)
}*@
</table>
</div>
<p>
<input type="submit" value="Create" />
</p>
}
编辑器模板视图
@model OpenXMLMvc3.Controllers.Assignment
<tr class="editorRow">
<td>
@Html.HiddenFor(model => Model.Id, new {@class="iHidden" })
sa
</td>
<td>
@Html.EditorFor(model => Model.Name)
</td>
<td>
@Html.EditorFor(model => Model.Amount)
</td>
<td>
@Html.EditorFor(model => Model.Remarks)
</td>
<td>
<a href="#" class="deleteRow">delete</a>
</td>
</tr>
那么我如何允许用户通过 MVC3 中的 EditorTemplates 从集合中删除项目
【问题讨论】：
标签： c# asp.net-mvc asp.net-mvc-3 mvc-editor-templates