【发布时间】：2021-12-03 09:39:36
【问题描述】：
在我的应用程序中，为了创建报告视图，我创建了一个 ViewModel：
namespace Asp_PASMVC.ViewModels
{
[NotMapped]
public class ReportViewModel
{
public string RequestBy { get; set; } // AppRequest
public string RequestByDessignation { get; set; } // AppRequest
public string RequestByDepartment { get; set; }// AppRequest
public string RequestedDate { get; set; }// AppRequest
public string ApprovalId { get; set; }// AppRequest
public string CompanyName { get; set; }
public List<ApprovalList> ApprovalList { get; set; }
public List<GeneralItemsApprovedList> GeneralItemsApprovedList { get; set; }
}
[NotMapped]
public class ApprovalList
{
public string ApproveDate { get; set; }
public string ApprovedBy { get; set; }
public string ApprovedByDessignation { get; set; }
}
[NotMapped]
public class GeneralItemsApprovedList
{
public string ItemDescription { get; set; }
public string ItemPrice { get; set; }
public byte[] Attachment { get; set; }
}
}
然后在控制器中，我加入了我想要获取数据的每个表，并将该数据传递给报表视图模型。
public ActionResult Index(int id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
AppRequest appRequest = db.AppRequest.Find(id);
if (appRequest.General.Count != 0)
{
List<ReportViewModel> RequestView = new List<ReportViewModel>();
var ReqDetails = (from a in db.AppRequest
join e in db.CreateEmployee on a.Req_By equals e.Id
join c in db.CreateCompany on e.CompanyId equals c.Id
join d in db.CreateDesignation on e.DesignId equals d.Id
join dep in db.CreateDepartment on e.DepId equals dep.Id
where a.Id == id
select new ReportViewModel
{
RequestedDate = a.Req_Date.ToString(),
RequestBy = e.EmpName,
CompanyName = c.CompanyName,
RequestByDessignation = d.Designation,
RequestByDepartment = dep.Department,
GeneralItemsApprovedList= (from a in db.AppRequest
join g in db.General on a.Id equals g.Req_Id
join gi in db.GeneralItms on g.Id equals gi.General_Id
where a.Id == id
select new GeneralItemsApprovedList
{
Attachment = gi.Attachment,
ItemDescription = gi.Attachment_Description,
ItemPrice = gi.Attachment_Amount.ToString()
}).ToList(),
ApprovalList = (from a in db.AppRequest
join ap in db.ApprovalProcess on a.Id equals ap.Req_Id
join pa in db.ApproveParties on ap.Id equals pa.ApprovalProcess_Id
join ae in db.CreateEmployee on pa.Approver_Id equals ae.Id
join ad in db.CreateDesignation on ae.DesignId equals ad.Id
where a.Id == id
select new ApprovalList
{
ApproveDate = pa.Approved_Date.ToString(),
ApprovedBy = ae.EmpName,
ApprovedByDessignation = ad.Designation,
}).ToList()
}).ToList();
return View("ApprovedReport", ReqDetails);
}
return View("");
}
因此，当我为视图调用视图模型数据时，就会出现问题。它没有向我显示我想要调用的属性。请注意，我仍在学习 asp.MVC，同时我开始为我的教育目的开发这个应用程序。所以有些地方我还不清楚。所以不知道我在这里做错了什么。所以这是我传递 ViewModel 数据的视图
@model IEnumerable <Asp_PASMVC.ViewModels.ReportViewModel>
@{
Layout = "~/Views/Shared/_Layout.cshtml";
}
<br />
<div class="invoice p-3 mb-3">
<!-- title row -->
<div class="row">
<div class="col-12">
<h4>
<i class="fas fa-globe"></i> PAS Approval
<small class="float-right">@DateTime.Now</small>
</h4>
</div>
<div class="col-12">
<h4>
</h4>
</div>
<!-- /.col -->
</div>
<!-- info row -->
<div class="row invoice-info">
<div class="col-sm-4 invoice-col">
From
<address>
<strong> @Html.DisplayFor(model => model.RequestBy)</strong><br> @Html.DisplayFor(model => model.RequestByDessignation)<br> @Html.DisplayFor(model => model.RequestByDepartment)<br> @Html.DisplayFor(model => model.CompanyName)<br><br>@Html.DisplayFor(model => model.RequestedDate)<br>
</address>
</div>
<!-- /.col -->
<div class="col-sm-4 invoice-col">
Approved By
@foreach (var item in Model.ApprovalList)
{
<address>
<strong>@Html.DisplayFor(model => item.ApprovedBy)</strong><br>@Html.DisplayFor(model => item.ApprovedByDessignation)<br>@Html.DisplayFor(model => item.ApproveDate)<br>@*Approved Date*@<br>
</address>
}
错误提示：
传入字典的模型项是类型 'System.Collections.Generic.List`1[Asp_PASMVC.ViewModels.ReportViewModel]', 但是这本字典需要一个类型的模型项 'Asp_PASMVC.ViewModels.ReportViewModel'。
在@Html.DisplayFor(model => model.RequestBy) 行中也显示RequestBy 找不到。
【问题讨论】：
标签： c# asp.net asp.net-mvc asp.net-mvc-4