Question

我有一个简单的asp.net mvc3项目，包含实体框架4.1。我问过上一个问题，答案很顺利 - How to correctly override the SaveChanges function in EF 4.1 date和loggedby的值在类构造函数中设置。这对于Create操作很好，但是当我使用Edit操作时，我看到日期和LoggedBy字段已更改，这是我不想要的。我也看到Delete不起作用 - 我猜这是因为构造函数。如何解决这个问题，以便我的Date和LoggedBy值设置为Create但在Edit期间没有更改？乙

using System;
using System.Collections.Generic;
using System.Web;

public partial class tblDefectDetail
{
    public tblDefectDetail()
    {
        DateLogged = DateTime.Now;
        LoggedBy = HttpContext.Current.User.Identity.Name;
    }

    public int ID { get; set; }
    public int Project { get; set; }
    public string LoggedBy { get; set; }
    public System.DateTime DateLogged { get; set; }
    public string Issue { get; set; }

我的行动看起来像这样：

public ActionResult Create()
        {
            ViewBag.BugLocation = new SelectList(db.tblBugLocations, "ID", "BugLocation");
            ViewBag.BugType = new SelectList(db.tblBugTypes, "ID", "BugType");
            ViewBag.BusinessUnit = new SelectList(db.tblBusinessUnits, "ID", "BU_Name");
            ViewBag.BugFoundMethod = new SelectList(db.tblDefectDiscoveryMethods, "ID", "DiscoveryMethod");
            ViewBag.Project = new SelectList(db.tblProjects, "ID", "ProjectName");
            ViewBag.Language = new SelectList(db.tblLanguages, "ID", "Language");
            return View();
        }

Answer 1

不是在构造函数中设置值，而是在Action方法中设置它们。因此，在将模型传递给视图之前，请在“创建操作方法”中设置所需的值。

public ActionResult Create() {
    var model = new tblDefectDetail() { LoggedBy = User.Identity.Name, DateLogged = DateTime.Now }

    return View(model);
}

ASP.NET MVC3需要更改Web应用程序的默认字段

1 个答案: