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我一直在環顧四周，而且我無法完全找到有人試圖完成我的工作。我有幾個模型在一個頁面上一起工作。型號爲employees1,phone_manager和phone_types。在MVC中設置DropDownList的默認值
我設法讓插入工作得很好，但我似乎無法讓編輯頁面工作。我需要把當前存儲的phone_type這是一個外鍵phone_type_id，並使其成爲我的組合框中的默認項目。
我的模式是：
[Table("employee.employees")]
public partial class employees1
{
public employees1()
{
employee_email_manager = new List<email_manager>();
employee_employment_history = new HashSet<employment_history>();
employee_job_manager = new HashSet<job_manager>();
employee_phone_manager = new HashSet<phone_manager>();
this.salaries = new HashSet<salary>();
}
[Key]
public int employee_id { get; set; }
[Display(Name = "Employee ID")]
public int? assigned_id { get; set; }
[Display(Name = "Web User ID")]
public int? all_id { get; set; }
[Required]
[StringLength(50)]
[Display(Name = "First Name")]
public string first_name { get; set; }
[StringLength(50)]
[Display(Name = "Last Name")]
public string last_name { get; set; }
[Column(TypeName = "date")]
[Display(Name = "Birthday")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime birth_day { get; set; }
[Required]
[StringLength(1)]
[Display(Name = "Gender")]
public string gender { get; set; }
[Required]
[StringLength(128)]
[Display(Name = "Social")]
public string social { get; set; }
[Required]
[StringLength(128)]
[Display(Name = "Address")]
public string address_line_1 { get; set; }
[StringLength(50)]
[Display(Name = "Suite/Apt#")]
public string address_line_2 { get; set; }
[Required]
[StringLength(40)]
[Display(Name = "City")]
public string city { get; set; }
[Required]
[StringLength(20)]
[Display(Name = "State")]
public string state { get; set; }
[Required]
[StringLength(11)]
[Display(Name = "Zip")]
public string zip { get; set; }
[Column(TypeName = "date")]
[Display(Name = "Hire Date")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime hire_date { get; set; }
[Column(TypeName = "date")]
[Display(Name = "Separation Date")]
[DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime? termination_date { get; set; }
[StringLength(70)]
[Display(Name = "Emergency Contact Name")]
public string emergency_contact_name { get; set; }
[StringLength(15)]
[Display(Name = "Emergency Contact Number")]
public string emergency_contact_phone { get; set; }
[Display(Name = "Notes")]
public string notes { get; set; }
public virtual all_employees all_employees { get; set; }
[Display(Name = "Email Addresses")]
public virtual ICollection<email_manager> employee_email_manager { get; set; }
[Display(Name = "Employment History")]
public virtual ICollection<employment_history> employee_employment_history { get; set; }
[Display(Name = "Position History")]
public virtual ICollection<job_manager> employee_job_manager { get; set; }
[Display(Name = "Phone Numbers")]
public virtual ICollection<phone_manager> employee_phone_manager { get; set; }
internal void CreatePhoneNumbers(int count = 1)
{
for (int i = 0; i < count; i++)
{
employee_phone_manager.Add(new phone_manager());
}
}
[Table("employee.phone_manager")]
public partial class phone_manager
{
/*public phone_manager()
{
phone_types = new HashSet<phone_types>();
}*/
[Key]
public int phone_id { get; set; }
public int employee_id { get; set; }
[Required]
[StringLength(15)]
[Display(Name="Phone Number")]
public string phone_number { get; set; }
[StringLength(5)]
[Display(Name = "Extension")]
public string phone_extension { get; set; }
[Display(Name = "Type")]
public int phone_type { get; set; }
[Column(TypeName = "date")]
public DateTime date_added { get; set; }
public bool deleted { get; set; }
public virtual employees1 employees1 { get; set; }
[ForeignKey("phone_type")]
public virtual phone_types phone_types { get; set; }
//public virtual ICollection<phone_types> phone_types { get; set; }
}
[Table("employee.phone_types")]
public partial class phone_types
{
public phone_types()
{
phone_manager = new HashSet<phone_manager>();
}
[Key]
public int phone_type_id { get; set; }
[Required]
[StringLength(50)]
public string phone_type_name { get; set; }
public virtual ICollection<phone_manager> phone_manager { get; set; }
}
}
我的控制器：
public ActionResult Create()
{
ViewBag.all_id = new SelectList(db.all_employees, "all_id", "all_id");
var employee = new employees1();
ViewBag.phone_type = new SelectList(db.phone_types, "phone_type_id", "phone_type_name");
employee.CreatePhoneNumbers(1);
return View(employee);
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include="employee_id,assigned_id,all_id,first_name,last_name,birth_day,gender,social,address_line_1,address_line_2,city,state,zip,hire_date,termination_date,emergency_contact_name,emergency_contact_phone,notes,employee_phone_manager")] employees1 employees1)
{
if (ModelState.IsValid)
{
foreach (employees1.phone_manager phone in employees1.employee_phone_manager.ToList())
{
if (phone.deleted == true)
{
employees1.employee_phone_manager.Remove(phone);
}
}
db.employees1.Add(employees1);
db.SaveChanges();
return RedirectToAction("Index");
}
var employee = new employees1();
ViewBag.phone_type = new SelectList(db.phone_types, "phone_type_id", "phone_type_name");
ViewBag.all = new SelectList(db.all_employees, "all_id", "all_id", employees1.all_id);
return View(employees1);
}
// GET: /Employees/Edit/5
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
employees1 employees1 = db.employees1.Find(id);
if (employees1 == null)
{
return HttpNotFound();
}
var employee = new employees1();
ViewBag.phone_type = new SelectList(db.phone_types, "phone_type_id", "phone_type_name");
ViewBag.all_id = new SelectList(db.all_employees, "all_id", "all_id", employees1.all_id);
return View(employees1);
}
// POST: /Employees/Edit/5
// 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 Edit([Bind(Include="employee_id,assigned_id,all_id,first_name,last_name,birth_day,gender,social,address_line_1,address_line_2,city,state,zip,hire_date,termination_date,emergency_contact_name,emergency_contact_phone,notes")] employees1 employees1)
{
if (ModelState.IsValid)
{
db.Entry(employees1).State = EntityState.Modified;
db.SaveChanges();
foreach (var item in employees1.employee_phone_manager)
{
db.Entry(item).State = EntityState.Modified;
db.SaveChanges();
}
return RedirectToAction("Index");
}
var db2 = new LightHouseMain();
var employee = new employees1();
ViewBag.phone_type = new SelectList(db.phone_types, "phone_type_id", "phone_type_name");
ViewBag.all_id = new SelectList(db.all_employees, "all_id", "all_id", employees1.all_id);
return View(employees1);
}
筆者認爲：
@Html.LabelFor(x => x.phone_type)
@Html.DropDownList("phone_type", string.Empty)
@Html.LabelFor(x => x.phone_number)
@Html.TextBoxFor(x => x.phone_number, new { @class = "phone", size = "10" })
@Html.LabelFor(x => x.phone_extension)
@Html.TextBoxFor(x => x.phone_extension, new { size = "4" })
@Html.HiddenFor(x => x.date_added, new { @Value = System.DateTime.Now })
@Html.HiddenFor(x => x.deleted, new { @class = "mark-for-delete" })
@Html.RemoveLink("Remove", "div.phoneNumber", "input.mark-for-delete")
任何幫助表示讚賞！
編輯
圖： 
你能詳細解釋一下嗎？我試圖做類似的事情，但似乎我的員工模型幾乎包含了我需要的所有東西，但手機類型除外。問題是，我將不得不重複這個過程約6個不同的表格和計數，所以任何簡化我的努力是值得歡迎的。 –
@Jdsfighter db.phone_types是保存所有手機類型數據的集合。我在創建操作的代碼中看到了這一點，並認爲這是您希望在下拉菜單中顯示的集合。 –
@Jdsfighter如果你在ViewBag.phone_type之後，這是一個屬性，它應該有用戶在你想要指定的值之前選擇的值作爲下拉的默認值。您既可以使用ViewBag，也可以在視圖模型中創建一個字符串屬性。 –