如何解决C# MVC 返回 ViewModel 到列表
我决定发布一个新问题而不是添加到现有问题中，因为这不是同一个问题。我按照另一个问题的评论创建了一个 viewmodel。
到目前为止，我还没有从 viewmodel 中列出。我确实在网上搜索过，看看我是否能找到一个例子，但我发现的只是；如何在 viewmodel 中创建列表，我已经知道该怎么做了。
我在下面有一个 viewmodel。我不确定它的结构是否正确，但控制器正在返回 count = 0
控制器：
public ActionResult Index()
{
List<Accountingviewmodels> list = new List<Accountingviewmodels>();
return View(list);
}
视图具有：@model IEnumerable<BestenEquipment.Models.Accountingviewmodels>
我确实尝试过@model List<BestenEquipment.Models.Accountingviewmodels>
但出现错误 'List<Accountingviewmodels>' does not contain a deFinition for 'Description' and no extension method 'Description' accepting a first argument of type 'List<Accountingviewmodels>' Could be found (are you missing a using directive or an assembly reference?)
控制器仍然是 count = 0
IEnumerable 不会出错，它只是给了我一个空表。所以我认为 IEnumerable 是要走的路。我只需要修复控制器。
如果有人能指出我正确的方向或告诉我我的控制器有什么问题，那将大有帮助。
这是视图模型：
public class Accountingviewmodels
{
[Key]
public Guid TransactionId { get; set; }
public string Description { get; set; }
[display(Name = "Company")]
public int? CompanyId { get; set; }
[display(Name = "vendor")]
public Guid? vendorId { get; set; }
[display(Name = "Rec Chk #")]
public string InCheckNumber { get; set; }
[display(Name = "Sent Chk #")]
public string OutCheckNumber { get; set; }
[display(Name = "Invoice #")]
public string InvoiceNumber { get; set; }
[display(Name = "PO #")]
public string PurchaSEOrderNumber { get; set; }
[display(Name = "Ledger Acct")]
public Guid LedgerAccountId { get; set; }
[display(Name = "Credit")]
public decimal? DebitAmount { get; set; }
[display(Name = "Debit")]
public decimal? CreditAmount { get; set; }
[display(Name = "Transaction")]
[displayFormat(DataFormatString = "{0:MM/dd/yyyy}",ApplyFormatInEditMode = false)]
public DateTime TransactionDate { get; set; }
[display(Name = "Modified By")]
public string ModifiedBy { get; set; }
[display(Name = "Modified")]
[displayFormat(DataFormatString = "{0:MM/dd/yyyy}",ApplyFormatInEditMode = false)]
public DateTime? ModifiedDate { get; set; }
public string SavedDocument { get; set; }
[display(Name = "Created")]
[displayFormat(DataFormatString = "{0:MM/dd/yyyy}",ApplyFormatInEditMode = false)]
public DateTime CreatedDate { get; set; }
[display(Name = "Created By")]
public string CreatedBy { get; set; }
public bool IsCredit { get; set; }
public bool IsDebit { get; set; }
public Guid Type { get; set; }
[ForeignKey("LedgerAccountId")]
public LedgerAccount LedgerAccount { get; set; }
[ForeignKey("CompanyId")]
public CompanyNames Company { get; set; }
[ForeignKey("vendorId")]
public vendors vendor { get; set; }
}
这很可能是一个简单的修复，我只需要轻轻一推..
使用db模型是这样的：return View(db.Transaction.ToList());
我需要用 viewmodel 做同样的事情..
感谢您的帮助！
谢谢
更新：
这是我的原始问题的链接，并被告知要创建一个视图模型.. Original Issue
更新：
添加视图：
@model List<BestenEquipment.Models.Accountingviewmodels>
@{
Layout = "~/Views/Shared/_DashboardLayout.cshtml";
}
@section ScriptsOrCss
{
@Html.Action("DataTableCssjs","Layout")
}
@Html.ValidationSummary(true,"",new { @class = "text-danger" })
<section class="content-header">
<h1>
Overview List
<small> Transactions </small>
</h1>
</section>
<section class="content">
<!-- Small Boxes (Stat Box) -->
<div class="row">
<div class="col-md-12">
@if (ViewBag.Create == true)
{
<div class="Box Box-solid Box-primary">
<div class="Box-body">
<!-- Split button -->
<div class="margin">
<div class="btn-group">
@Ajax.ModalDialogActionLink("Create Quick","Create","Create ","btn btn-info btn-sm")
</div>
<div class="btn-group">
<a href="~/Tranaction/Create" class="btn btn-warning btn-sm">Create Full</a>
</div>
</div>
<!-- flat split buttons -->
</div><!-- /.Box-body -->
</div>
}
<div class="Box Box-primary">
<div class="Box-header">
<h3 class="Box-title">Orders</h3>
</div><!-- /.Box-header -->
<div class="Box-body table-responsive">
<table class="table table-striped table-hover table-bordered" id="TransactionListTable">
<thead>
<tr>
<th>
@Html.displayNameFor(model => model.Description)
</th>
<th>
@Html.displayNameFor(model => model.Company.CompanyName)
</th>
<th>
@Html.displayNameFor(model => model.vendor.Name)
</th>
<th>
@Html.displayNameFor(model => model.InCheckNumber)
</th>
<th>
@Html.displayNameFor(model => model.OutCheckNumber)
</th>
<th>
@Html.displayNameFor(model => model.InvoiceNumber)
</th>
<th>
@Html.displayNameFor(model => model.PurchaSEOrderNumber)
</th>
<th>
@Html.displayNameFor(model => model.LedgerAccountId)
</th>
<th>
@Html.displayNameFor(model => model.DebitAmount)
</th>
<th>
@Html.displayNameFor(model => model.CreditAmount)
</th>
<th>
@Html.displayNameFor(model => model.TransactionDate)
</th>
<th>
CRUD
</th>
<th>
Actions
</th>
</tr>
</thead>
<tbody>
@foreach (var item in Model.Items)
{
<tr>
<td>
@Html.displayFor(modelItem => item.Description)
</td>
<td>
@if (item.CompanyId != null)
{
@Html.displayFor(modelItem => item.Company.CompanyName)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.vendorId != null)
{
@Html.displayFor(modelItem => item.vendor.Name)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.InCheckNumber != null)
{
@Html.displayFor(modelItem => item.InCheckNumber)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.OutCheckNumber != null)
{
@Html.displayFor(modelItem => item.OutCheckNumber)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.InvoiceNumber != null)
{
@Html.displayFor(modelItem => item.InvoiceNumber)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.PurchaSEOrderNumber != null)
{
@Html.displayFor(modelItem => item.PurchaSEOrderNumber)
}
else
{
<b>N/A</b>
}
</td>
<td>
@Html.displayFor(modelItem => item.LedgerAccount.Title)
</td>
<td>
@if (item.IsDebit == true)
{
@Html.displayFor(modelItem => item.DebitAmount)
}
else
{
<b>N/A</b>
}
</td>
<td>
@if (item.IsCredit == true)
{
@Html.displayFor(modelItem => item.CreditAmount)
}
else
{
<b>N/A</b>
}
</td>
<td>
@Html.displayFor(modelItem => item.TransactionDate)
</td>
<td>
@if (ViewBag.Edit == true)
{
@Ajax.ModalDialogActionLink("Edit","Edit","btn btn-warning btn-sm",new { id = item.TransactionId })
}
@if (ViewBag.Read == true)
{
@Ajax.ModalDialogActionLink("Details","Details","Transaction Details","btn btn-info btn-sm",new { id = item.TransactionId })
}
@if (ViewBag.Delete == true)
{
@Ajax.ActionLink("Delete","Delete","Tranaction",new { id = item.TransactionId },new AjaxOptions()
{
HttpMethod = "Delete",Confirm = "Are you sure you want to delete " + item.Description + "Transaction",},new { @class = "btn btn-danger btn-sm Delete" })
}
</td>
<td>
</td>
</tr>
}
</tbody>
</table>
</div>
</div>
</div>
</div>
解决方法
我复制了你的错误。试试这个。
而不是这个：
@model List<BestenEquipment.Models.AccountingViewModels>
使用这个：
@model IEnumerable<BestenEquipment.Models.AccountingViewModels>
最后，删除 Items 循环中的 foreach 词，它应该是：
@foreach (var item in Model)
Public class AcctModel
{
public IEnumerable<AccountingViewModels> Items {get; set;}
}
在 view.cshtml 中
foreach(var item in Model.Items)
{
// Your code here
}
我发现当您只列出记录时，使用 SQL 视图会更容易。没有任何创建或编辑，因此只需填充您需要的内容就更容易了。数据库的工作就是做这项工作，所以为什么不让它呢！
这是我所做的，以防有人需要这样的东西，或者正在寻找一种更简洁的方法来做到这一点。 请记住，我需要从 2 个独立数据库中的表进行联接。在同一个数据库中创建视图更容易，您只需选择表，然后选择您想要的字段。
首先创建视图，在我的情况下，我需要使用别名进行查询并且没有使用 GUI。
SQL：
SELECT t.TransactionId,t.Description,t.InCheckNumber,t.OutCheckNumber,t.InvoiceNumber,t.PurchaseOrderNumber,la.Title,t.DebitAmount,t.CreditAmount,t.TransactionDate,t.SavedDocument,t.CreatedDate,t.CreatedBy,tt.Type,cn.CompanyName,v.Name
FROM dbo.LedgerAccount AS la INNER JOIN
dbo.[Transaction] AS t ON la.LedgerAccountId = t.LedgerAccountId
INNER JOIN
dbo.TransactionType AS tt ON t.Type = tt.TypeId INNER JOIN
OtherDBName.dbo.CompanyNames AS cn ON t.CompanyId =
cn.CompanyId LEFT OUTER JOIN
OtherDbName.dbo.Vendors AS v ON t.VendorId = v.VendorId
我将事务表 t 称为类型表 tt，当您引用另一个数据库时，您必须使用 dbname.schema.table.column 这些我给了名称 cn用于 CompanyNames 表，v 用于 Vendors 表。在我的特殊情况下，我不会总是在每条记录中都有供应商名称，因此您需要执行 LEFT OUTER JOIN
创建完成后，您现在可以返回到您的项目并创建实体。
在您的上下文中，您将创建它，就好像它只是另一个表一样。除了不映射它。没有必要。我们不会将其用于 CRUD 操作。 我调用了视图 TransactionsView：
public class AccountingEntities : DbContext
{
public AccountingEntities() : base("AccountingConnection")
{
}
[NotMapped]
public IDbSet<TransactionsView> TransactionsView { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
}
}
用途：
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;
using System.ComponentModel.DataAnnotations.Schema;
然后创建模型 TranactionsView：
using System;
using System.ComponentModel.DataAnnotations;
namespace YourProject.AccountingDTO.Entities
{
public class TransactionsView
{
[Key]
public Guid TransactionId { get; set; }
[Display(Name = "Desc")]
public string Description { get; set; }
[Display(Name = "Company")]
public string CompanyName { get; set; }
[Display(Name = "Vendor")]
public String Name { get; set; }
[Display(Name = "Rec Chk #")]
public string InCheckNumber { get; set; }
[Display(Name = "Sent Chk #")]
public string OutCheckNumber { get; set; }
[Display(Name = "Invoice #")]
public string InvoiceNumber { get; set; }
[Display(Name = "PO #")]
public string PurchaseOrderNumber { get; set; }
[Display(Name = "Ledger Acct")]
public string Title { get; set; }
[Display(Name = "Credit")]
public decimal? DebitAmount { get; set; }
[Display(Name = "Debit")]
public decimal? CreditAmount { get; set; }
[Display(Name = "Transaction")]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}",ApplyFormatInEditMode = false)]
public DateTime TransactionDate { get; set; }
[Display(Name = "Doc Link")]
public string SavedDocument { get; set; }
[Display(Name = "Created")]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}",ApplyFormatInEditMode = false)]
public DateTime CreatedDate { get; set; }
[Display(Name = "Created By")]
public string CreatedBy { get; set; }
[Display(Name = "Type")]
public string Type { get; set; }
}
}
控制器中的：
private readonly AccountingEntities account = new AccountingEntities();
// GET: Transaction
public ActionResult Index()
{
return View(account.TransactionsView.ToList());
}
在视图中，您只需创建一个列表视图并将您的 @model 放在顶部：
@model IEnumerable<YourProject.AccountingDTO.Entities.TransactionsView>
如果我遗漏了一些我可以回答您可能提出的任何问题的内容，我会尽量做到彻底。我一直将这些用于列表视图和表格
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