在我的索引页面上，我有一个搜索表单，允许用户根据 3 个搜索条件提取信息。当搜索结果从控制器返回时，它们作为一个List对象返回，该对象是视图模型的一个属性，并显示在搜索表单下方的表格中。
然后用户可以选择他们想要更改的记录。他们将通过选中指定记录旁边的复选框来执行此操作。然后，使用显示在搜索框下方的表单，输入新值并点击“更新”按钮以保存更改。（我们这样做是为了允许用户进行大规模更新，而不必逐行更改表格）
这是一个屏幕截图来说明我的意思。这是用户点击“搜索”按钮后页面的外观：
当用户点击“搜索”时，表单被指示回发到控制器的 Index 方法。当用户点击“克隆选定项目”时，表单被指示回发到同一控制器中的“更新”方法。但是，问题是返回到“更新”方法的视图模型对象完全为空，除了放置在New Territory、New Description和New Effective Date文本框中的值。
我对 ASP MVC 比较陌生，所以任何帮助/建议都将不胜感激。不知道为什么视图模型会使用“搜索”按钮从控制器发回相同的值，但不会使用“克隆选定项目”按钮。
查看模型（这是回传到控制器的内容）
public class ZipCodeIndex
{
public List<ZipCodeTerritory> zipCodeTerritory { get; set; }
[DisplayName("Zip Code")]
public string searchZip { get; set; }
[DisplayName("Effective on this date")]
public string searchDate { get; set; }
[DisplayName("State")]
public string searchState { get; set; }
[DisplayName("New Territory")]
public string newTerritory { get; set; }
[DisplayName("New Description")]
public string newDescription { get; set; }
[DisplayName("New Effective Date")]
public string newEffectiveDate { get; set; }
public ZipCodeIndex()
{
zipCodeTerritory = new List<ZipCodeTerritory>();
}
}
模型（这会填充视图模型中的列表对象）
[MetadataType(typeof(ZipCodeTerritoryMetaData))]
public partial class ZipCodeTerritory
{
public bool Update { get; set; }
}
public partial class ZipCodeTerritory
{
public string ChannelCode { get; set; }
public string DrmTerrDesc { get; set; }
public string IndDistrnId { get; set; }
public string StateCode { get; set; }
public string ZipCode { get; set; }
public System.DateTime EndDate { get; set; }
public System.DateTime EffectiveDate { get; set; }
public string LastUpdateId { get; set; }
public Nullable<System.DateTime> LastUpdateDate { get; set; }
public int Id { get; set; }
}
看法
@model Monet.ViewModel.ZipCodeIndex
@using(Html.BeginForm("Index", "ZipCodeTerritory", FormMethod.Post))
{
<div id="searchBox" class="boxMe">
<div id="zipBox">
@Html.Raw("Zip Code")
@Html.TextAreaFor(model => model.searchZip, new { style = "width: 300px;", placeholder = "Enter up to 35 comma separated zip codes" })
</div>
<div id="dateBox">
@Html.LabelFor(model => model.searchDate)
@Html.TextBoxFor(model => model.searchDate, new { style="width: 80px;"})
</div>
<div id="stateBox">
@Html.LabelFor(model => model.searchState)
@Html.TextBoxFor(model => model.searchState, new { style = "width: 25px;" })
<button type="submit">Search</button>
</div>
</div>
<div id="errorStatus">
@ViewBag.ErrorMessage
</div>
<div style="clear: both;"></div>
}
<br/>
@Html.ActionLink("Create New", "Create")
<br/>
@if (Model != null)
{
using(Html.BeginForm("Update", "ZipCodeTerritory", FormMethod.Post))
{
<div id="cloneBox">
@Html.LabelFor(model => model.newTerritory)
@Html.TextBoxFor(model => model.newTerritory, new { style="width: 30px;padding-left:10px;"})
@Html.LabelFor(model => model.newDescription)
@Html.TextBoxFor(model => model.newDescription, new { style = "width: 250px;padding-left:10px;" })
@Html.LabelFor(model => model.newEffectiveDate)
@Html.TextBoxFor(model => model.newEffectiveDate, new { style = "width: 80px;padding-left:10px;" })
<button type="submit">Clone Selected Items</button>
</div>
}
<table id="thetable" class="tablesorter" >
<thead>
<th></th>
<th>Channel</th>
<th>Territory</th>
<th>Description</th>
<th>State</th>
<th>Zip</th>
<th>Effective</th>
<th>End Date</th>
<th>Last Update By</th>
<th>Last Update Date</th>
<th></th>
</thead>
<tbody>
@foreach (var item in Model.zipCodeTerritory)
{
<tr>
<td>@Html.CheckBoxFor(model => item.Update)</td>
<td>
@Html.DisplayFor(model => item.ChannelCode)
</td>
<td>
@Html.DisplayFor(model => item.IndDistrnId)
</td>
<td>
@Html.DisplayFor(model => item.DrmTerrDesc)
</td>
<td>
@Html.DisplayFor(model => item.StateCode)
</td>
<td>
@Html.DisplayFor(model => item.ZipCode)
</td>
<td>
@Html.DisplayFor(model => item.EffectiveDate)
</td>
<td>
@Html.DisplayFor(model => item.EndDate)
</td>
<td>
@Html.DisplayFor(model => item.LastUpdateId)
</td>
<td>
@Html.DisplayFor(model => item.LastUpdateDate)
</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = item.Id })
</td>
</tr>
}
</tbody>
</table>
}
控制器
public ViewResult Index(ZipCodeIndex search)
{
try
{
//If search criteria is null page is loading for the first time so send blank view
if (String.IsNullOrWhiteSpace(search.searchZip) &&
String.IsNullOrWhiteSpace(search.searchDate) &&
String.IsNullOrWhiteSpace(search.searchState))
{
return View();
}
//Determine if necessary search criteria has been sent
if (String.IsNullOrWhiteSpace(search.searchZip) && String.IsNullOrWhiteSpace(search.searchState))
{
ViewBag.ErrorMessage = "Either State or Zip Code Must be Specified";
return View(search);
}
DateTime effectiveDate;
//Convert date string to DateTime type
if (String.IsNullOrWhiteSpace(search.searchDate))
{
effectiveDate = DateTime.MinValue;
}
else
{
effectiveDate = Convert.ToDateTime(search.searchDate);
}
//Conduct search by State Code/Date alone
if (String.IsNullOrWhiteSpace(search.searchZip))
{
search.zipCodeTerritory = (from z in db.ZipCodeTerritory
where z.StateCode.Equals(search.searchState) &&
z.EffectiveDate >= effectiveDate
select z).ToList();
return View(search);
}
//Zip codes have been requested to conduct zip search
string[] zipArray;
//Create array and remove white spaces
zipArray = search.searchZip.Split(',').Distinct().ToArray();
for (int i = 0; i < zipArray.Length; i++)
{
zipArray[i] = zipArray[i].Trim();
}
//Determine if state code is being used in search
if (String.IsNullOrWhiteSpace(search.searchState))
{
foreach (var zip in zipArray)
{
var item = from z in db.ZipCodeTerritory
where z.ZipCode.Equals(zip) &&
z.EffectiveDate >= effectiveDate
select z;
search.zipCodeTerritory.AddRange(item);
}
}
else
{
foreach (var zip in zipArray)
{
var item = from z in db.ZipCodeTerritory
where z.ZipCode.Equals(zip) &&
z.EffectiveDate >= effectiveDate &&
z.StateCode.Equals(search.searchState)
select z;
search.zipCodeTerritory.AddRange(item);
}
}
}
catch (DbEntityValidationException dbEx)
{
ViewBag.ErrorMessage = "An error has occurred, we apologize for the incovenience. IT has been notified and will resolve the issue shortly.";
SendEmail.ErrorMail(Common.ErrorCheck.CombineDbErrors(dbEx));
}
catch (Exception ex)
{
ViewBag.ErrorMessage = ErrorCheck.FriendlyError(ex);
SendEmail.ErrorMail(ex);
}
return View(search);
}
[HttpPost]
public ActionResult Update(ZipCodeIndex updateZip)
{
foreach (var zipCode in updateZip.zipCodeTerritory)
{
if (zipCode.Update)
{
try
{
if (!string.IsNullOrEmpty(updateZip.newTerritory)) zipCode.IndDistrnId = updateZip.newTerritory;
if (!string.IsNullOrWhiteSpace(updateZip.newDescription)) zipCode.DrmTerrDesc = updateZip.newDescription;
if (!string.IsNullOrWhiteSpace(updateZip.newEffectiveDate)) zipCode.EffectiveDate = Convert.ToDateTime(updateZip.newEffectiveDate);
db.Entry(zipCode).State = EntityState.Modified;
db.SaveChanges();
}
catch (DbEntityValidationException dbEx)
{
ViewBag.ErrorMessage = "An error has occurred, we apologize for the incovenience. IT has been notified and will resolve the issue shortly.";
SendEmail.ErrorMail(Common.ErrorCheck.CombineDbErrors(dbEx));
}
catch (Exception ex)
{
ViewBag.ErrorMessage = "An error has occurred, we apologize for the incovenience. IT has been notified and will resolve the issue shortly.";
SendEmail.ErrorMail("Zip Code not updated: " + zipCode.ToString() + " |MESSAGE| " + ex.Message);
}
}
}
return RedirectToAction("Index", updateZip);
}
编辑
我已将以下隐藏字段添加到第二个表单（发布到Update方法）。这将发回搜索条件，但List对象仍为空。
@if (Model != null)
{
using(Html.BeginForm("Update", "ZipCodeTerritory", FormMethod.Post))
{
@Html.HiddenFor(model => model.searchZip)
@Html.HiddenFor(model => model.searchDate)
@Html.HiddenFor(model => model.searchState)
@Html.HiddenFor(model => model.zipCodeTerritory)
<div id="cloneBox">