我是MVC的新手并试图弄清楚如何为部分类设置默认值。我一直在寻找2天，并且无法获得任何工作。 Here是一种假定的解决方案，但它对我不起作用。我还尝试了[DefaultValue（10）]数据注释。
这是从edmx文件
创建的自动生成的分部类//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated from a template.
//
// Manual changes to this file may cause unexpected behavior in your application.
// Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace OTIS.Models.Admin
{
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
public partial class Company
{
public Company()
{
this.Facilities = new HashSet<Facility>();
}
public int CompanyID { get; set; }
[Required]
[Display(Name = "Company Name")]
public string CompanyName { get; set; }
public string Address1 { get; set; }
public string Address2 { get; set; }
public string City { get; set; }
public string State { get; set; }
public string PostalCode { get; set; }
public decimal ItemMargin { get; set; }
public decimal ServicesMargin { get; set; }
public decimal InvoiceTimeIncrement { get; set; }
public decimal CashDiscountPct { get; set; }
public decimal BaseServiceHourlyRate { get; set; }
public decimal HourlyPremiumRush { get; set; }
public decimal HourlyPremiumLate { get; set; }
public decimal HourlyPremiumCustomerMaterial { get; set; }
public int CreatedByID { get; set; }
public System.DateTime CreatedOn { get; set; }
public int ModifiedBy { get; set; }
public System.DateTime ModifiedOn { get; set; }
public virtual UserProfile UserProfile { get; set; }
public virtual UserProfile UserProfile1 { get; set; }
public virtual ICollection<Facility> Facilities { get; set; }
}
}
这是我创建的用于添加注释的部分类。
namespace OTIS.Models.Admin
{
[MetadataType(typeof(CompanyMD))]
public partial class Company
{
//public Company()
//{
// //private System.DateTime _currentDateTime = DateTime.Now;
// ////Set Default Values
// //CreatedByID = (int)Membership.GetUser().ProviderUserKey;
// //CreatedOn = _currentDateTime;
// //ModifiedBy = (int)Membership.GetUser().ProviderUserKey;
// //ModifiedOn = _currentDateTime;
//}
public string FullAddress
{
get
{
return this.City + ", " + this.State + " " + this.PostalCode;
}
}
public class CompanyMD
{
private System.DateTime _currentDateTime = DateTime.Now;
private int _currentUser = (int)Membership.GetUser().ProviderUserKey;
[Display(Name = "Company ID")]
public int CompanyID { get; set; }
[Required]
[Display(Name = "Company Name")]
public string CompanyName { get; set; }
[Display(Name = "Address")]
public string Address1 { get; set; }
[Display(Name = "Address 2")]
public string Address2 { get; set; }
public string City { get; set; }
public string State { get; set; }
[Display(Name = "Zip")]
public string PostalCode { get; set; }
[Display(Name = "Address")]
public string FullAddress { get; set; }
[Display(Name = "Material Margin")]
public decimal ItemMargin { get; set; }
[Display(Name = "Overtime Margin")]
public decimal ServicesMargin { get; set; }
[Display(Name = "Invoice Hour Increment")]
public decimal InvoiceTimeIncrement { get; set; }
private decimal _cashDiscountPct;
[Display(Name = "Cash Discount %")]
[DisplayFormat(DataFormatString = "{0:P2}")]
public decimal CashDiscountPct
{
get { return _cashDiscountPct; }
set { _cashDiscountPct = value/100; }
}
[Display(Name = "Base Hourly Rate ($/Hr)")]
[DataType(DataType.Currency), DisplayFormat(DataFormatString = "{0:C2}", ApplyFormatInEditMode = true)]
public decimal BaseServiceHourlyRate { get; set; }
[Display(Name = "Rush Premium ($/Hr)")]
[DataType(DataType.Currency), DisplayFormat(DataFormatString = "{0:C2}", ApplyFormatInEditMode = true)]
public decimal HourlyPremiumRush { get; set; }
[Display(Name = "Late Premium ($/Hr)")]
[DataType(DataType.Currency), DisplayFormat(DataFormatString = "{0:C2}", ApplyFormatInEditMode = true)]
[DefaultValue(75)]
public decimal HourlyPremiumLate { get; set; }
[Display(Name = "Cust Material Premium ($/Hr)")]
[DataType(DataType.Currency), DisplayFormat(DataFormatString = "{0:C2}", ApplyFormatInEditMode = true)]
public decimal HourlyPremiumCustomerMaterial { get; set; }
[Display(Name = "Created By")]
public int CreatedByID { get; set; }
//{
// get { return _currentUser; }
// set { _currentUser = value; }
//}
[Display(Name = "Created On")]
[DatabaseGenerated(DatabaseGeneratedOption.Computed)]
//[DataType(DataType.Date), DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
public System.DateTime CreatedOn
{
get { return _currentDateTime; }
set { _currentDateTime = value; }
}
[Display(Name = "Modified By")]
public int ModifiedBy { get; set; }
//{
// get { return _currentUser; }
// set { _currentUser = value; }
//}
[Display(Name = "Modified On")]
public System.DateTime ModifiedOn
{
get { return _currentDateTime; }
set { _currentDateTime = value; }
}
}
}
}
然后在我的控制器中，我实例化一个新的类实例来初始化它，但我设置的值没有设置。
//
// GET: /Company/Create
public ActionResult Create()
{
ViewBag.CreatedByID = new SelectList(db.UserProfiles, "UserId", "UserName");
ViewBag.ModifiedBy = new SelectList(db.UserProfiles, "UserId", "UserName");
Company newCompany = new Company();
return View(newCompany);
}
答案 0 :(得分：3)
我认为问题在于你如何引用部分类。它应该是没有代码的partial类的空引用。 EF使用此“声明”将您的部分类链接到元数据类。因此，您的元数据类应如下所示：
namespace OTIS.Models.Admin
{
[MetadataType(typeof(CompanyMD))]
public partial class Company
{} // <-- note the close bracket!
public class CompanyMD
{
private System.DateTime _currentDateTime = DateTime.Now;
private int _currentUser = (int)Membership.GetUser().ProviderUserKey;
public string FullAddress
{
get
{
return this.City + ", " + this.State + " " + this.PostalCode;
}
}
[Display(Name = "Company ID")]
public int CompanyID { get; set; }
[Required]
[Display(Name = "Company Name")]
public string CompanyName { get; set; }
// ....etc.... removed for brevity
} // close metadata class
} // close namespace
希望这有帮助！
答案 1 :(得分：0)
我发现我需要在GetNew（）方法中的Repository Class中处理这个问题，该方法将填充该类的新实例的默认值。