我一定不能用正确的短语搜索。这是一个简单的概念，我已经在其他语言和框架中轻松完成了。
我正在为创建记录的人和最后更新记录的UserID保存UserID。我想显示User.FirstName +''+ User.LastName。而不是显示UserID。
我目前的方式LastEditBy和CreateBy在页面上显示为空白。
控制器：我获取客户模型并手动将模型映射到customerViewModel，然后将其传递给我的部分视图。
public ActionResult Edit(int customerId)
{
Customer customer = DbContext.Customers.FirstOrDefault(x => x.CustomerId == customerId);
CustomerViewModel customerViewModel = MapToViewModel(customer);
customerViewModel.UserSelectList = GetUserGroupList();
UserManager<ApplicationUser> _userManager = HttpContext.GetOwinContext().Get<ApplicationUserManager>();
var CreateByUser = _userManager.FindById(customerViewModel.CreateById);
var EditByUser = _userManager.FindById(customerViewModel.LastEditById);
customerViewModel.CreateBy = CreateByUser.FirstName + " " + CreateByUser.LastName;
customerViewModel.LastEditBy = EditByUser.FirstName + " " + EditByUser.LastName;
if (Request.IsAjaxRequest()) {
return PartialView("_CustomerEditPartial", customerViewModel);
}
return View("_CustomerEditPartial", customerViewModel);
}
CustomerViewModel：
public class CustomerViewModel : DbContext{
public CustomerViewModel(): base("name=CustomerViewModel")
{
}
[Key]
public int CustomerId { get; set; }
[MaxLength(128), ForeignKey("ApplicationUser")]
public string UserId { get; set; }
public SelectList UserSelectList { get; set; }
#region additional Fields
// This overrides default conventions or data annotations
[Required(ErrorMessage = "Please enter your first name.")]
[StringLength(50)]
[Display(Name = "First Name")]
public string FirstName { get; set; }
[Required(ErrorMessage = "Please enter your last name.")]
[StringLength(100)]
[Display(Name = "Last Name")]
public string LastName { get; set; }
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime CreateDate { get; set; } = DateTime.Now;
public string CreateById { get; set; }
[NotMapped]
public string CreateBy { get; set; }
public string LastEditById { get; set; }
[NotMapped]
public string LastEditBy { get; set; }
[DataType(DataType.Date)]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime LastEditDate { get; set; } = DateTime.Now;
public virtual ApplicationUser ApplicationUser { get; set; }
}
public class UserGroupList
{
public string Value { get; set; }
public string Text { get; set; }
}
我的部分视图页面：_CustomerEditPartial.cshtml
@model WOA.ViewModels.CustomerViewModel
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" daa-dismiss="modal" aria-hidden="True">x</button>
<h4 class="modal-title">Edit Customer</h4>
</div>
@using (Ajax.BeginForm("Edit", "Customers", null, new AjaxOptions { HttpMethod = "Post", OnFailure = "OnFail" }, new { @class = "form-horizontal", role = "form" })) {
<div class="modal-body">
<div class="form-horizontal">
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
@Html.HiddenFor(model => model.CustomerId)
<div class="form-group">
@Html.LabelFor(model => model.UserId, "UserId", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.UserId, ViewData.Model.UserSelectList, "Select One", new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.UserId, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.FirstName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.FirstName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.FirstName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.LastName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.LastName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.LastName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CreateDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextBoxFor(model => model.CreateDate, new { @readonly = "readonly" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CreateBy, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextBoxFor(model => model.CreateBy, new { @readonly = "readonly" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.LastEditBy, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextBoxFor(model => model.LastEditBy, new { @readonly = "readonly" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.LastEditDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextBoxFor(model => model.LastEditDate, new { @readonly = "readonly" })
</div>
</div>
</div>
</div>
<div class="modal-footer">
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<input type="submit" class="btn btn-primary" value="Save changes" />
</div>
</div>
</div>
<script type="text/javascript">
function OnSuccess() {
alert("success");
}
function OnFail() {
alert("fail");
}
function OnComplete() {
alert("Complete");
}
</script>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
</div>
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
我已经更新了我的代码，它现在正在运行，但我不相信这是正确的方法。
我相信我应该能够在初始调用时通过Linq返回我需要的其他值，而不是再向数据库再次访问其他值。
我无法找到一种方法来使用Linq。
提前感谢您的时间和精力。