Question

我有一个创建视图，用于HTTPPOST上的db.SaveChanges（）失败的发票。异常消息是{＆＃34;无效的列名称＆＃39; UserDetail_UserId＆＃39;。＆＃34;}。在POST控制器中，看起来像我试图添加到我的InvoiceItems表中的invoiceitem对象是使用下拉列表中的所选用户名正确填充的，该用户名由我的UserDetails表中的用户名填充。＆＃34;用户ID＆＃34;是UserDetails表中的关键列，但它没有在下拉列表中使用，因此我不清楚为什么有任何数据要保存到＆＃34; UserDetail_UserId＆＃34;柱。我的代码如下：

型号：

public class InvoiceItem
{
    //Identity Column
    public int ServiceID { get; set; }

    [Key]
    public string ProfileUserName { get; set; }

    public DateTime InvoiceDate { get; set; }
    public string Address { get; set; }
    public string Note { get; set; }
    public decimal Price { get; set; }
    public decimal SubTotal { get; set; }
    public bool InvoicePaid { get; set; }
}

public class UserDetail
{
    [Key]
    public Guid UserId { get; set; }
    public string ProfileUserName { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FullName { get; set; }
    public string Address { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string Zip { get; set; }
    public string Phone { get; set; }
    public DateTime DateUpdated { get; set; }
    public virtual ICollection<InvoiceItem> InvoiceItems { get; set; }
}

public class ProShotDB : DbContext
{
    public DbSet<UserDetail> UserDetails { get; set; }
    public DbSet<UserLinkToken> UserLinkTokens { get; set; }
    public DbSet<InvoiceItem> InvoiceItems { get; set; }
}

控制器：

public ActionResult Create()
    {
        ViewBag.ProfileUserNames = db.UserDetails.Select(
        c => new
        {
            ProfileUserName = c.ProfileUserName,
            NameAddress = c.FullName + " - " + c.Address
        });
        return View();
    }

    [HttpPost]
    public ActionResult Create(InvoiceItem invoiceitem)
    {
        decimal Tax = 1.066m;
        if (ModelState.IsValid)
        {
            invoiceitem.InvoiceDate = DateTime.Now;
            invoiceitem.SubTotal = invoiceitem.Price*Tax;
            invoiceitem.InvoicePaid = false;

            db.InvoiceItems.Add(invoiceitem);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        ViewBag.ProfileUserNames = db.UserDetails.Select(
        c => new
        {
            ProfileUserName = c.ProfileUserName,
            NameAddress = c.FullName + " - " + c.Address
        });
        return View(invoiceitem);
    }

查看：

@model Pro_Shot_Portal.Models.InvoiceItem

@{
    ViewBag.Title = "Input Invoice";
}

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
    <legend>Input Invoice:</legend>

    <div class="alert alert-error" style="width:250px;">
        <button type="button" class="close" data-dismiss="alert">×</button>
        <strong>Warning!</strong> Assigning invoice to wrong user could cause major problems, please triple check before proceeding.
    </div>
    <div class="editor-label">
        @Html.LabelFor(model => model.ProfileUserName, "Attach invoice to user")
    </div>
    <div class="editor-field">
        @Html.DropDownListFor(model => model.ProfileUserName, new SelectList(ViewBag.ProfileUserNames, "ProfileUserName", "NameAddress"), "-- Pick Client For Invoice --")
        @Html.ValidationMessageFor(model => model.ProfileUserName)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Address)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Address)
        @Html.ValidationMessageFor(model => model.Address)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Note)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Note)
        @Html.ValidationMessageFor(model => model.Note)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Price)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.Price)
        @Html.ValidationMessageFor(model => model.Price)
    </div>

    <p>
        <input type="submit" value="Create" />
    </p>
</fieldset>
}

<div>
    @Html.ActionLink("Cancel Invoice Creation", "Index")
</div>

据我所知，invoiceitem模型对象属性填充了正确的数据，并且我用db.SaveChanges（）调用的唯一数据库更改是＆＃34; db.InvoiceItems.Add（invoiceitem） ;＆＃34 ;.任何人都可以告诉我它试图访问，编写或更新名为＆＃34; UserDetails_UserId＆＃34;的列的位置和原因。也许我在DropdownListFor上搞砸了什么，因为那是与UserDetails表交互的唯一部分？

感谢。

Answer 1

您具有一对多关系设置，您在异常中使用下划线看到的列名称是默认生成的关系。有关详细信息，请参阅here。

MVC3：HTTPPOST控制器db.SaveChanges（）失败，出现“无效的列名...”

1 个答案: