Asp.net MVC 批量删除数据

ProductList视图

<div class="mid">
     <div id="editInfo">
        @using (Html.BeginForm("Delete", "Admin"))
        {
           <div class="c1 headFont">
           <input type="checkbox" id="ckbSelAll" onclick="SelectAll(this.checked)" />
           <input type="submit"value="多选删除" onclick="return confirm('确定要删除吗?')" />
           </div>
           <div class="c3 headFont">产品名称</div>
           <div class="c4 headFont">发布时间</div>
           <div class="c5 headFont">编辑</div>
           <ul id="info">
              @foreach (var p in Model)
              {
                 <li>
                    <div class="c1 list">@Html.CheckBox("checkitem", new {value=p.ID }) 
                                   @Html.ActionLink("删除", "Delete", new { id = p.ID }, new { onclick = "return confirm('确定删除吗？')" })
                    </div>
                    <div class="c3 list">@Html.DisplayFor(modelItem => p.productName)</div>
                    <div class="c4 list">@Html.DisplayFor(modelItem => p.inDate,"LongDateTime")</div>
                    <div class="c5 list">@Html.ActionLink("编辑", "EditProduct", new { id=p.ID })</div>
                </li>
            }
          </ul>
     }
    </div>
</div>

效果图如下：

Controller代码：

public ActionResult Delete(int id)
{
   ProductInfo pro = db.ProductInfoes.Find(id);
   db.ProductInfoes.Remove(pro);
   db.SaveChanges();
   return RedirectToAction("ProductList");
}

[HttpPost]
public ActionResult Delete(FormCollection collection)
{
    string str = collection["checkitem"];// checkitem复选框的名
    string[] strDelete = str.Split(',');
    foreach (var i in strDelete)
    {
        if (i != "false")
        {
           ProductInfo pro = db.ProductInfoes.Find(int.Parse(i));
           db.ProductInfoes.Remove(pro);
           db.SaveChanges();
        }
    }
    return RedirectToAction("ProductList");
}