在 ASP.Net MVC 中设置修改和创建日期时间

Question

我正在尝试创建我自己的 CMS 博客用于教育目的，几乎每个博客在每篇文章中都有一个参考，通常是这样说的：

Updated: April 1, 1999 | Published: April 1, 1999 | Created: April 1, 1999

我将我的模型设置为允许通过视图表单手动输入，但我假设在创建表单时可以通过模型执行此操作。

我知道我应该使用 DateTime.UTCNow 来建立它，但我不确定我应该如何触发它。

型号

using System;
using System.Data.Entity;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Web.Mvc;

namespace JosephMCasey.Areas.Article.Models
{
    public class Articles
    {
        [Key]
        public int PostId { get; set; }
        [Required]
        [StringLength(256, MinimumLength = 1, ErrorMessage = "Title cannot be longer than 256 characters.")]
        public string Title { get; set;}
        [Display(Name = "Create Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? CreateDate { get; set; }
        [Display(Name = "Publish Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? PublishDate { get; set; }
        [Display(Name = "Modify Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? ModifyDate { get; set; }
        public string Author { get; set; }
        [Required]
        [NotMapped]
        public MvcHtmlString PageBody { get; set; }

        public string Body
        {
            get { return PageBody.ToHtmlString(); }
            set { PageBody = new MvcHtmlString(value); }
        }
        // Feature is the featured image of each blog
        public string Feature { get; set; }
        public bool Published { get; set; }
        public string Excerpt { get; set;}
        [Display(Name = "GMT of Create Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? CreateDateUTC { get; set; }
        [Display(Name = "UTC of Publish Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? PublishDateUTC { get; set; }
        [Display(Name = "GMT of Modify Date")]
        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime? ModifyDateUTC { get; set; }
        public string CanonicalUrl { get; set; }
        public string UrlSlug { get; set; }
        public string Category { get; set; }
        public string Tag { get; set; }
    }
    public class ArticleDBContext : DbContext
    {
        public DbSet<Articles> Articles { get; set; }
        public DbSet<Category> Categories { get; set; }
        public DbSet<Tag> Tags { get; set; }
    }
}

可能的扩展方法？

   //Where should the extension method be coded?
            internal static void SyncObjectsStatePreCommit(this DbContext dbContext)
            {
                foreach (var dbEntityEntry in dbContext.ChangeTracker.Entries())
                {
    
                    var trackableObject = dbEntityEntry.Entity as ITrackable;
    
                    // we need to set/update trackable properties
                    if (trackableObject == null)
                    {
                        continue;
                    }
    
                    var dateTime = DateTime.Now;
                    var dateTimeUTC = DateTime.UtcNow;
    
                    // set createddate only for added entities
                    if (entityState.ObjectState == ObjectState.Added)
                    {
                        trackableObject.CreateDate = dateTime;
                        trackableObject.CreateDateUTC = dateTimeUTC;
                    }
    
                    // set LastUpdatedDate for any case other than Unchanged
                    if (entityState.ObjectState != ObjectState.Unchanged)
                    {
                        trackableObject.ModifyDate = dateTime;
                        trackableObject.ModifyDateUTC = dateTimeUTC;
                    }
                }
            }

找到类似问题

Handling Created and Modified Date in MVC

DateCreated and DateModified in ASP.NET MVC 5

Answer 1

我会在您将博客条目保存到数据库时设置所有这些。要么在 table 上设置触发器，要么在执行这些操作时在 C# 代码中设置它们。

您还应该将 Published 和 Modified 设置为 DateTime?，因为您在最初创建博客条目时没有它们的数据。有人可能会争辩说创建和发布可以是同一个任务，所以它们可以耦合，但我仍然认为您可以在发布博客之前先创建一个博客。

在 ASP.Net MVC 中设置修改和创建日期时间

Set Modify and Create DateTime in ASP.Net MVC

c#

asp.net

asp.net-mvc

datetime

model

型号

可能的扩展方法？

找到类似问题