我正在制作一個 Web 應用程式，我從資料庫模型中使用了基于物體的 EF 設計器我想隱藏后端的修改日期和修改日期，它不應該顯示給用戶有人可以幫助我如何完成這項作業嗎？我在下面附上了我的圖片和代碼，如果有任何問題，請告訴我。
圖片：
控制器代碼：
// GET: Contract
public ActionResult Index()
{
return View(db.Contracts.ToList());
}
// GET: Contract/Details/5
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Contract contract = db.Contracts.Find(id);
if (contract == null)
{
return HttpNotFound();
}
return View(contract);
}
// GET: Contract/Create
public ActionResult Create()
{
return View();
}
// POST: Contract/Create
// To protect from overposting attacks, enable the specific properties you want to bind to, for
// more details see https://go.microsoft.com/fwlink/?LinkId=317598.
\[HttpPost\]
\[ValidateAntiForgeryToken\]
public ActionResult Create(\[Bind(Include = "Id,ContractName,ContractNumber,CreatedBy,CreatedDate,ModifiedBy,ModifiedDate")\] Contract contract)
{
if (ModelState.IsValid)
{
db.Contracts.Add(contract);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(contract);
}
// GET: Contract/Edit/5
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Contract contract = db.Contracts.Find(id);
if (contract == null)
{
return HttpNotFound();
}
return View(contract);
}
// POST: Contract/Edit/5
// To protect from overposting attacks, enable the specific properties you want to bind to, for
// more details see https://go.microsoft.com/fwlink/?LinkId=317598.
\[HttpPost\]
\[ValidateAntiForgeryToken\]
public ActionResult Edit(\[Bind(Include = "Id,ContractName,ContractNumber,CreatedBy,CreatedDate,ModifiedBy,ModifiedDate")\] Contract contract)
{
if (ModelState.IsValid)
{
db.Entry(contract).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
return View(contract);
}
// GET: Contract/Delete/5
public ActionResult Delete(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Contract contract = db.Contracts.Find(id);
if (contract == null)
{
return HttpNotFound();
}
return View(contract);
}
// POST: Contract/Delete/5
\[HttpPost, ActionName("Delete")\]
\[ValidateAntiForgeryToken\]
public ActionResult DeleteConfirmed(int id)
{
Contract contract = db.Contracts.Find(id);
db.Contracts.Remove(contract);
db.SaveChanges();
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
db.Dispose();
}
base.Dispose(disposing);
}
}
} `
我試圖弄清楚，但我不知道如何在后端隱藏這兩個修改日期和修改者。
查看代碼
<h2>Create</h2>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>Contract</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.ContractName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ContractName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ContractName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.ContractNumber, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ContractNumber, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ContractNumber, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CreatedBy, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.CreatedBy, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.CreatedBy, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CreatedDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.CreatedDate, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.CreatedDate, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.ModifiedBy, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ModifiedBy, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ModifiedBy, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.ModifiedDate, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.ModifiedDate, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ModifiedDate, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button style="background-color:white; border-color:darkgrey;"><input type="submit" value="Create" class="btn btn-default" /></button>
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
<script src="~/Scripts/jquery-3.4.1.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
uj5u.com熱心網友回復：
通常，存盤在資料庫中的物體型別具有您不想、不能或不應該在 UI 上公開的欄位。
如果您不關心存在的資料并且只想“隱藏”它，則不要在表格標記中包含這些資料。
但是，如果您根本不希望出現這些欄位，一種常見的解決方法是創建一個僅包含您希望公開的欄位的 DTO 類。更新您的 UI 以定位 DTO 并從表中洗掉列。
public class ContractDto
{
// all the fields you want to expose
// Ctor
public ContractorDto(Contract contract) { ... }
// "From" pattern
public static ContractDto From(Contract contract)
=> new ContractDto { ... }
// An implicit operator can also be helpful
public static implicit operator ContractDto(Contract contract)
=> new ContractDto { ... }
}
例如，如果您需要更新在更新后洗掉的欄位，請使用主鍵加載物體型別并更新它。這假設您有某種方式來填充當前用戶。
var entity = db.Contracts.Find(contractDto.Id);
// update entity from dto as needed
entity.ModifiedBy = // populate the user from context or similar
entity.ModifiedDate = DateTime.Now;
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