<null>”和“ System.DateTime”之间的隐式转换错误
private DateTime? pApproveDate=null; pApproveDate =(Reader["ApproveDate"]==DBNull.Value)?(DateTime?)null: Convert.ToDateTime(Reader["ApproveDate"]);
慎于行,敏于思!GGGGGG
private DateTime? pApproveDate=null; pApproveDate =(Reader["ApproveDate"]==DBNull.Value)?(DateTime?)null: Convert.ToDateTime(Reader["ApproveDate"]);