问题描述
我有一个页面，用于修改从数据库中提取的对象。加载页面时，LINQ 查询会创建一个对象列表，然后显示在 HTML 表中。用户可以使用下拉菜单选择他们想要进行的更改，然后单击他们想要进行此更改的对象上的复选框。一切正常，直到 datatables.net 搜索栏发挥作用。
使用此搜索栏，可优化列表中可查看的项目数量，使用户更容易进行所需的更改。不幸的是，当用户单击按钮进行这些更改时，什么也没有发生。查看 OnPost()，那里没有返回任何对象，因此无法更新任何内容。
namespace CustomerPageTest.Pages.View
{
public class EditClassificationTiersModel : PageModel
{
[BindProperty(SupportsGet = true)]
public int returnedClassification { get; set; }
[BindProperty(SupportsGet = true)]
public int returnedTier { get; set; }
[BindProperty(SupportsGet = true)]
public IEnumerable<vInfoView> vInfoViews { get; set; }
[BindProperty(SupportsGet = true)]
public string SearchTerm { get; set; }
[BindProperty(SupportsGet = true)]
public int assessmentID { get; set; }
public List<SelectListItem> ClassificationList { get; set; } = DatabaseClassificationData();
[BindProperty(SupportsGet = true)]
public List<SelectListItem> TierList { get; set; }
public void OnGet(int assessmentId)
{
assessmentID = assessmentId;
TierList = DatabaseTierData();
vInfoViews = GetvInfoViewsByAssessment(assessmentId);
}
public async Task<IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return Page();
}
using (var context = new DataWarehouseContext())
{
foreach (var info in vInfoViews)
{
if (info.isChecked)
{
var temp = context.RvtoolsVInfo
.Where(a => a.VmId.Equals(info.vmID))
.FirstOrDefault();
if(returnedClassification != 0) //If Data Classification form was changed we change it,else it stays the same
temp.DataClassificationId = returnedClassification;
if(returnedTier != 0) //If Tier form was changed we change it,else it stays the same
temp.TierNumber = returnedTier;
try
{
await context.SaveChangesAsync(); //Saves changes on selected objects
}
catch (Exception)
{
}
}
}
}
return RedirectToPage("/View/EditClassificationTiers",new { assessmentId = assessmentID });
}
@page "{assessmentId}"
@model CustomerPageTest.Pages.View.EditClassificationTiersModel
@{
ViewData["Title"] = "EditClassificationTiers";
}
@section Scripts
{
<script src="https://code.jquery.com/jquery-3.5.1.js"></script>
<script src="https://cdn.datatables.net/1.10.22/js/jquery.dataTables.min.js"></script>
<script>
$(document).ready(function () {
$('#myTable').dataTable({
"paging": false,"search": {
"smart": false
}
});
});
</script>
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.datatables.net/1.10.22/css/jquery.dataTables.min.css">
<h1 align="center" style="color:yellowgreen">Edit Classifications / Tiers</h1>
<br />
<form method="post">
<div class="container">
<table class="table" style="border: hidden !important; border-bottom: hidden !important; white-space: Nowrap; width: 100%;">
<tr>
<td>
<h3 class="text-light" style="white-space: Nowrap">Data Classification:</h3>
<div class="form-group justify-content-center">
<select class="form-control" asp-for="returnedClassification" asp-items="Model.ClassificationList"></select>
</div>
</td>
<td>
<h3 class="text-light" style="white-space: Nowrap">Tier:</h3>
<div class="form-group justify-content-center">
<select class="form-control" asp-for="returnedTier" asp-items="Model.TierList"></select>
</div>
</td>
<td>
<br /><br /><br />
<div class="inner-addon left-addon">
<i class="glyphicon glyphicon-plus text-light col-md-offset-6"></i>
<input type="submit" value="Add Classification / Tier" class="btn btn-dark text-light col-md-offset-6" />
</div>
</td>
<td>
<br /><br /><br />
<div class="inline-right justify-content-center">
<a class="btn btn-dark" asp-page="/View/EditAssessment" asp-route-assessmentId="@Model.assessmentID">
<i class="glyphicon glyphicon-arrow-left"></i> Back
</a>
</div>
</td>
</tr>
</table>
</div>
<input type="hidden" asp-for="@Model.assessmentID" name="assessmentID" />
<table id="myTable" class="display cell-border stripe" role="grid" style="background-color: #dbdbdb; text-align:center; width: 100%">
<thead>
<tr class="text-dark">
<th style="text-align: center; width: 5%;"></th>
<th style="text-align: center; width: 10%;"><strong>Name</strong></th>
<th style="text-align: center; width: 10%;"><strong>Datacenter</strong></th>
<th style="text-align: center; width: 15%;"><strong>Cluster</strong></th>
<th style="text-align: center; width: 15%;"><strong>Host</strong></th>
<th style="text-align: center; width: 10%;"><strong>Classification</strong></th>
<th style="text-align: center; width: 10%;"><strong>Tier</strong></th>
<th style="text-align: center; width: 25%"><strong>Annotation</strong></th>
</tr>
</thead>
<tbody style="background-color: #dbdbdb;">
@for (int i = 0; i < Model.vInfoViews.Count(); i++)
{
<tr class="text-dark">
<td style="padding-top: 15px; width: 5%;">
<input type="checkBox" asp-for="@Model.vInfoViews.ElementAt(i).isChecked" name="vInfoViews[@i].isChecked" />
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).vHostID" name="vInfoViews[@i].vHostID" />
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).assessmentID" name="vInfoViews[@i].assessmentID" />
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).vmID" name="vInfoViews[@i].vmID" />
</td>
<td style="padding-top: 15px; width: 10%;">
@Model.vInfoViews.ElementAt(i).Name
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).Name" name="vInfoViews[@i].Name" />
</td>
<td style="padding-top: 15px; width: 10%;">
@Model.vInfoViews.ElementAt(i).Datacenter
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).Datacenter" name="vInfoViews[@i].Datacenter" />
</td>
<td style="padding-top: 15px; width: 15%;">
@Model.vInfoViews.ElementAt(i).Cluster
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).Cluster" name="vInfoViews[@i].Cluster" />
</td>
<td style="padding-top: 15px; width: 15%;">
@Model.vInfoViews.ElementAt(i).hostName
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).hostName" name="vInfoViews[@i].hostName" />
</td>
<td style="padding-top: 15px; width: 10%;">
@Model.vInfoViews.ElementAt(i).printClassification
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).classificationID" name="vInfoViews[@i].classificationID" />
</td>
<td style="padding-top: 15px; width: 10%;">
@Model.vInfoViews.ElementAt(i).Tier
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).Tier" name="vInfoViews[@i].Tier" />
</td>
<td style="padding-top: 15px; width: 25%;">
@Model.vInfoViews.ElementAt(i).Annotation
<input type="hidden" asp-for="@Model.vInfoViews.ElementAt(i).Annotation" name="vInfoViews[@i].Annotation" />
</td>
</tr>
}
</tbody>
</table>
</form>
我不能给出一个有效的例子，但我会提供当前问题的屏幕截图。这些第一个屏幕截图是一切正常时发生的情况：
接下来，这是 OnPost() 的样子：
您可以看到对象已经通过，因此当页面重新加载时，进行了更改：
现在假设我希望使用搜索栏更改带有 Annotation: "PRTG Monitoring" 的行，如下所示：
当我查看 OnPost() 时，这就是我所看到的
列表为空！！
所以，这是一个我不知道如何解决的问题，而且我在其他地方找不到解决方案，你们认为我应该怎么做？有没有办法用与前端每一行中的对象对应的 ID 填充新的 List 对象？
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
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