c# - 当值为0000-00-00 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到类字段时遇到错误 Unable to convert MySQL date/time value to System.DateTime"，如何优雅地处理代码不抛出异常？

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:

Unable to convert MySQL date/time value to System.DateTime

Answer 1

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

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