因此，我实现了一些自定义验证，以防止类似的记录输入到数据库中。我唯一的问题是，它不是向用户显示错误/验证消息，而是显示错误页面。
我要去哪里错了？还是我该如何正确实现呢？
验证：
public class ValidSimilarRequests : ValidationAttribute
{
private LotusWorksEntities db = new LotusWorksEntities();
protected override ValidationResult
IsValid(object value, ValidationContext validationContext)
{
var model = (Models.HolidayRequestForm)validationContext.ObjectInstance;
int empID = Convert.ToInt32(model.EmployeeID);
DateTime _startdate = Convert.ToDateTime(model.StartDate);
DateTime _finishdate = Convert.ToDateTime(model.FinishDate);
var holidayexist = db.HolidayRequestForms.Any( x => x.EmployeeID==empID && x.StartDate <= _startdate && x.FinishDate >= _finishdate );
if (holidayexist)
{
return new ValidationResult
("A holiday Request for this date range has already been requested");
}
else
{
return ValidationResult.Success;
}
}
}
型号：
public partial class HolidayRequestForm
{
public int RequestID { get; set; }
[ValidSimilarRequests(ErrorMessage =
"A holiday Request for this date range has already been requested")]
public int EmployeeID { get; set; }
[ValidSameWeek(ErrorMessage =
"Holiday Request Must be made on a weekly Period")]
[DisplayFormat(DataFormatString = "{0:dd/MMM/yy}", ApplyFormatInEditMode = true)]
public System.DateTime StartDate { get; set; }
[ValidStartFinishDate(ErrorMessage =
"Finish Date can not be Greater than Start date.")]
[DisplayFormat(DataFormatString = "{0:dd/MMM/yy}", ApplyFormatInEditMode = true)]
public System.DateTime FinishDate { get; set; }
[Range(0.0001, int.MaxValue, ErrorMessage = "Hours Requested must be greater than zero. ")]
public decimal HoursTaken { get; set; }
public string Comments { get; set; }
public int YearCreated { get; set; }
public int MonthCreated { get; set; }
public int DayCreated { get; set; }
public Nullable<int> YearOfHoliday { get; set; }
public Nullable<bool> Approved { get; set; }
public string SubmittedBy { get; set; }
public string ApprovedBy { get; set; }
public Nullable<int> WorkWeek { get; set; }
public Nullable<int> MonthOfHoliday { get; set; }
public virtual Employee Employee { get; set; }
}
错误页面显示：
一个或多个实体的验证失败。有关更多详细信息，请参见“ EntityValidationErrors”属性。
控制器：
[Authorize(Roles = "Admin,User,SuperUser")]
public ActionResult Create()
{
ViewBag.EmployeeID = new SelectList(db.Employees, "EmployeeID", "FullName");
return View();
string name = Session["Name"].ToString();
var EmployeeIDCatch = db.Employees.Where(s => s.Email.Equals(name)).Select(s => s.EmployeeID);
}
// POST: HolidayRequestForms/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "RequestID,StartDate,FinishDate,HoursTaken,Comments,YearCreated,MonthCreated,DayCreated,YearOfHoliday,Approved,SubmittedBy,ApprovedBy")] HolidayRequestForm holidayRequestForm)
{
if (ModelState.IsValid)
{
if (Session["Name"] == null)
{
TempData["msg"] = "Your Session Expired - Please Login";
return RedirectToAction("Login", "Account");
}
string name = Session["Name"].ToString();
var employeeID = db.Employees.Where(s => s.Email.Equals(name)).Select(s => s.EmployeeID).FirstOrDefault();
holidayRequestForm.EmployeeID = employeeID;
var submittedby = db.Employees.Where(s => s.Email.Equals(name)).Select(s => s.Email).FirstOrDefault();
holidayRequestForm.SubmittedBy = submittedby;
//Saves changes and begins Email Actions
db.HolidayRequestForms.Add(holidayRequestForm);
db.SaveChanges();
SendMailToAreaManager();
SendMailToManager();
SendMailToAdmin();
return RedirectToAction("Index", "Calendar");
}
ViewBag.EmployeeID = new SelectList(db.Employees, "EmployeeID", "FullName", holidayRequestForm.EmployeeID);
return View(holidayRequestForm);
}
查看：
@model HolidayTracker.Models.HolidayRequestForm
<div>
<div class="col-md-12">
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<h2 align="center">Holiday Request Form</h2>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.StartDate, "Start Date", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.StartDate, "Start Date", new { htmlAttributes = new { @class = "form-control", @style = "width:400px", autocomplete = "off" } })
@Html.ValidationMessageFor(model => model.StartDate, "", new { @class = "text-warning" })
<p id="warning" style="color:orange"></p>
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.FinishDate, "Finish Date", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.FinishDate, new { htmlAttributes = new { @class = "form-control",@style = "width:400px", autocomplete = "off" } })
@Html.ValidationMessageFor(model => model.FinishDate, "", new { @class = "text-danger" })
<p id="warningFD" style="color:orange"></p>
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.HoursTaken, "Hours Requested", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.HoursTaken, new { htmlAttributes = new { @class = "form-control", @style = "width:400px" } })
@Html.ValidationMessageFor(model => model.HoursTaken, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Comments, htmlAttributes: new { @class = "control-label col-md-2"})
<div class="col-md-10">
@Html.TextAreaFor(
model => model.Comments,
new { placeholder = "Enter Dates and how many Hours per Date Here. ", style = "width: 400px; height: 200px;" })
@Html.ValidationMessageFor(model => model.Comments, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Submit" class="btn btn-warning" />
</div>
</div>
}
</div>
</div>
</div>