日期是01/01/0001而不是数据库中的日期?

时间:2012-12-06 11:09:08

标签: c# sql sql-server asp.net-mvc-3

我的sql server 2008 r2数据库中有这一行,但我不明白:

2012-12-06 11:00:36.703 and is of type DATETIME

当我在视图中显示它时:

Mon, Jan 1, 0001 

这是我的代码:

var allNews = ZincService.NewsService.GetNewsPostsForId(id);

List<Zinc.Web.Areas.News.ViewModels.Home.NewsPostsViewModel> newsItems = new List<NewsPostsViewModel>();

foreach (var newsItem in allNews)
{ 
  NewsPostsViewModel newsItemViewModel = new NewsPostsViewModel();
  newsItemViewModel.CommentDate = String.Format("{0:ddd, MMM d, yyyy}", newsItem.CommentDate);
}

public class NewsPostsViewModel
{
  public Entities.News.News MainNews { get; set; }
  public virtual string News { get; set; }
  public virtual int NewsId { get; set; }
  public virtual string CommentDate { get; set; }
}

  public List<DataModels.News.NewsPostsDataModel> GetNewsPostsForId(int id)
{
  using (SqlConnection conn = new SqlConnection(ZincModelContainer.CONNECTIONSTRING))
  {
    using (SqlCommand cmd = conn.CreateCommand())
    {
      conn.Open();
      cmd.CommandType = System.Data.CommandType.StoredProcedure;
      cmd.CommandText = "[News].[GetNewsPostsForId]";

      SqlParameter param = new SqlParameter("@Id", System.Data.SqlDbType.Int);
      param.Value = id;
      cmd.Parameters.Add(param);

      List<DataModels.News.NewsPostsDataModel> news = new List<DataModels.News.NewsPostsDataModel>();

      using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
      {
        DataTable dt = new DataTable();
        adapter.Fill(dt);

        foreach (DataRow row in dt.Rows)
        {
          string message = Convert.ToString(row["NewsDescription"]);
          news.Add(new DataModels.News.NewsPostsDataModel { NewsPostId = id ,Message = message});
        }
      }

      return news;
    }
  }
}

public class NewsPostsDataModel
{
  public virtual int NewsPostId { get; set; }
  public virtual string Message { get; set; }
  public virtual DateTime CommentDate { get; set; }
}

有人可以帮助我吗?

1 个答案:

答案 0 :(得分:3)

这是问题所在:

news.Add(new DataModels.News.NewsPostsDataModel { NewsPostId = id ,Message = message});

您没有在此处填充CommentDate,因此它的默认值为DateTime.MinValue

当然我们现在无法判断你的存储过程是否完全返回值,但假设它存在,你应该从DataRow获取并将其放入模型中......

修复代码之前,您应该退后一步,考虑一下您的诊断过程。你试过调试吗?添加日志?您应该能够非常快速地看到模型中没有CommentDate,然后尝试找出为什么您没有CommentDate ,这应该让你回到创建模型实例的代码。如果您可以改进您的诊断过程,您可以通过不必提出尽可能多的问题来显着加快您未来的发展。