当值为00:00:00时，如何处理mysql datetime列

Question

我有一个数据库列'date_announced'，其值为0000-00-00 00:00:00，当我尝试将此值插入类字段时我遇到错误 Unable to convert MySQL date/time value to System.DateTime"，如何优雅地处理代码而不抛出异常？

date_announced = 0000-00-00 00:00:00

var BuildDetails = new BuildAnnounceDetails();

while (rdr.Read())
{
    BuildDetails.SP = rdr.GetString(0);
    //BuildDetails.BuildID = rdr.GetString(1);
    BuildDetails.CreatedDate = rdr.GetString(1);
    BuildDetails.AnnouncedDate = rdr.GetString(2); **//throws an exception at this line**
    BuildDetails.AnnouncedBy = rdr.GetString(3);
    if (BuildDetails != null)
    {
        BuildAnnounceDetailsInfo.Add(BuildDetails);
    }
}

错误：

  

无法将MySQL日期/时间值转换为System.DateTime

Answer 1

您应该使用具有IsValidDateTime属性的GetMySqlDateTime方法。所以在你的情况下：

BuildDetails.AnnouncedDate = rdr.GetMySqlDateTime(2).IsValidDateTime?rdr.GetString(2):string.Empty;