C#对数据库中null值的判断
dbValue指从数据库读出值
方法为:
Boolean isEquals = Object.Equals(dbValue, DBNull.Value)
或:Boolean isEquals = dbValue.Equals(DBNull.Value)
方法为:
Boolean isEquals = Object.Equals(dbValue, DBNull.Value)
或:Boolean isEquals = dbValue.Equals(DBNull.Value)